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_e1_1116_e7_1440.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:07:19,156 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:07:19,158 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:07:19,169 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:07:19,170 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:07:19,171 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:07:19,173 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:07:19,177 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:07:19,180 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:07:19,181 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:07:19,182 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:07:19,182 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:07:19,183 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:07:19,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:07:19,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:07:19,188 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:07:19,201 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:07:19,203 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:07:19,204 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:07:19,205 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:07:19,206 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:07:19,209 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:07:19,209 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:07:19,209 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:07:19,213 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:07:19,214 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:07:19,215 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:07:19,215 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:07:19,218 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:07:19,218 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:07:19,219 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:07:19,219 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:07:19,220 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:07:19,220 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:07:19,227 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:07:19,227 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 19:07:19,248 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:07:19,250 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:07:19,250 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:07:19,250 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:07:19,251 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:07:19,251 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:07:19,252 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:07:19,252 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:07:19,252 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:07:19,252 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:07:19,252 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:07:19,252 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:07:19,253 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:07:19,253 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:07:19,253 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:07:19,253 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:07:19,253 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:07:19,254 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:07:19,256 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:07:19,258 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:07:19,258 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:07:19,308 INFO ]: Repository-Root is: /tmp [2018-06-22 19:07:19,321 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:07:19,326 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:07:19,327 INFO ]: Initializing SmtParser... [2018-06-22 19:07:19,328 INFO ]: SmtParser initialized [2018-06-22 19:07:19,328 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e7_1440.smt2 [2018-06-22 19:07:19,329 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 19:07:19,410 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e7_1440.smt2 unknown [2018-06-22 19:07:19,822 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e7_1440.smt2 [2018-06-22 19:07:19,827 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:07:19,833 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:07:19,833 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:07:19,833 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:07:19,833 INFO ]: ChcToBoogie initialized [2018-06-22 19:07:19,846 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:19,946 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19 Unit [2018-06-22 19:07:19,947 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:07:19,947 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:07:19,947 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:07:19,947 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:07:19,986 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:19,986 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,004 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,004 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,009 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,019 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,021 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (1/1) ... [2018-06-22 19:07:20,024 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:07:20,024 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:07:20,024 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:07:20,024 INFO ]: RCFGBuilder initialized [2018-06-22 19:07:20,025 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (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 19:07:20,035 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:07:20,035 INFO ]: Found specification of procedure False [2018-06-22 19:07:20,035 INFO ]: Found implementation of procedure False [2018-06-22 19:07:20,035 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:07:20,035 INFO ]: Found specification of procedure state [2018-06-22 19:07:20,035 INFO ]: Found implementation of procedure state [2018-06-22 19:07:20,035 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:07:20,035 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:07:20,035 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 19:07:20,473 INFO ]: Using library mode [2018-06-22 19:07:20,474 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:07:20 BoogieIcfgContainer [2018-06-22 19:07:20,474 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:07:20,478 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:07:20,478 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:07:20,481 INFO ]: TraceAbstraction initialized [2018-06-22 19:07:20,481 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:07:19" (1/3) ... [2018-06-22 19:07:20,483 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8be2598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:07:20, skipping insertion in model container [2018-06-22 19:07:20,484 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:19" (2/3) ... [2018-06-22 19:07:20,484 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8be2598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:07:20, skipping insertion in model container [2018-06-22 19:07:20,484 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:07:20" (3/3) ... [2018-06-22 19:07:20,486 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:07:20,495 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:07:20,506 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:07:20,562 INFO ]: Using default assertion order modulation [2018-06-22 19:07:20,563 INFO ]: Interprodecural is true [2018-06-22 19:07:20,563 INFO ]: Hoare is false [2018-06-22 19:07:20,563 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:07:20,563 INFO ]: Backedges is TWOTRACK [2018-06-22 19:07:20,563 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:07:20,563 INFO ]: Difference is false [2018-06-22 19:07:20,563 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:07:20,563 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:07:20,587 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:07:20,600 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:07:20,600 INFO ]: Found error trace [2018-06-22 19:07:20,601 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:20,601 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:20,606 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:07:20,608 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:20,608 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:20,650 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:20,651 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:20,651 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:20,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:20,954 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:07:20,957 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:07:20,957 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:07:20,959 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:07:20,969 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:07:20,970 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:07:20,971 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:07:21,084 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:21,084 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:07:21,085 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:07:21,086 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:07:21,086 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:21,101 INFO ]: With dead ends: 13 [2018-06-22 19:07:21,101 INFO ]: Without dead ends: 13 [2018-06-22 19:07:21,102 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 19:07:21,115 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:07:21,148 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:07:21,149 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:07:21,150 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:07:21,151 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:07:21,152 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:21,152 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:07:21,152 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:07:21,152 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:07:21,153 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:07:21,153 INFO ]: Found error trace [2018-06-22 19:07:21,153 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:21,153 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:21,153 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:07:21,154 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:21,154 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:21,155 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:21,155 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:21,155 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:21,256 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:21,716 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-06-22 19:07:21,867 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:07:21,867 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:21,867 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 19:07:21,875 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:21,992 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:22,002 INFO ]: Computing forward predicates... [2018-06-22 19:07:22,382 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:07:22,405 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:22,436 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:07:22,437 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:07:22,437 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:07:22,437 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:07:22,438 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:07:22,902 WARN ]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-06-22 19:07:23,148 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:23,148 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:07:23,149 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:07:23,149 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:07:23,149 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:23,149 INFO ]: With dead ends: 15 [2018-06-22 19:07:23,149 INFO ]: Without dead ends: 15 [2018-06-22 19:07:23,150 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 19:07:23,150 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:07:23,153 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:07:23,153 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:07:23,153 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:07:23,153 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:07:23,154 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:23,154 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:07:23,154 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:07:23,154 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:07:23,154 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:07:23,154 INFO ]: Found error trace [2018-06-22 19:07:23,154 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:23,154 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:23,155 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:07:23,155 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:23,155 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:23,155 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:23,156 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:23,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:23,295 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:23,680 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2018-06-22 19:07:24,045 WARN ]: Spent 339.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2018-06-22 19:07:24,117 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:07:24,117 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:24,117 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 19:07:24,145 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:07:24,266 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:07:24,266 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:24,273 INFO ]: Computing forward predicates... [2018-06-22 19:07:24,741 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:07:24,775 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:24,775 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:07:24,775 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:07:24,775 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:07:24,776 INFO ]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:07:24,776 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:07:25,000 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 [2018-06-22 19:07:25,261 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 94 [2018-06-22 19:07:25,892 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 114 [2018-06-22 19:07:26,095 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2018-06-22 19:07:26,208 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:26,208 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:07:26,209 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:07:26,209 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:07:26,209 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:26,209 INFO ]: With dead ends: 17 [2018-06-22 19:07:26,209 INFO ]: Without dead ends: 17 [2018-06-22 19:07:26,210 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:07:26,210 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:07:26,213 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:07:26,213 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:07:26,214 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:07:26,214 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:07:26,214 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:26,214 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:07:26,214 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:07:26,214 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:07:26,214 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:07:26,214 INFO ]: Found error trace [2018-06-22 19:07:26,215 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:26,215 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:26,215 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:07:26,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:26,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:26,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:26,216 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:26,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:26,374 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:26,899 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 15 [2018-06-22 19:07:27,022 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 37 [2018-06-22 19:07:27,432 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 28 [2018-06-22 19:07:27,445 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:07:27,445 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:27,445 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 19:07:27,454 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:07:27,577 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:07:27,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:27,601 INFO ]: Computing forward predicates... [2018-06-22 19:07:27,877 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:07:27,897 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:27,897 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:07:27,897 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:07:27,897 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:07:27,897 INFO ]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:07:27,898 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:07:28,117 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2018-06-22 19:07:28,424 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2018-06-22 19:07:28,639 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2018-06-22 19:07:28,838 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:28,838 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:07:28,839 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:07:28,839 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:07:28,839 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:28,840 INFO ]: With dead ends: 19 [2018-06-22 19:07:28,840 INFO ]: Without dead ends: 19 [2018-06-22 19:07:28,840 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:07:28,840 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:07:28,843 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:07:28,843 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:07:28,844 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:07:28,844 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:07:28,844 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:28,844 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:07:28,844 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:07:28,844 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:07:28,845 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:07:28,845 INFO ]: Found error trace [2018-06-22 19:07:28,845 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:28,845 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:28,845 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:07:28,845 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:28,845 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:28,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:28,846 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:28,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:28,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:30,106 WARN ]: Spent 563.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 16 [2018-06-22 19:07:30,829 WARN ]: Spent 698.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 45 [2018-06-22 19:07:31,128 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 34 [2018-06-22 19:07:31,245 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2018-06-22 19:07:31,419 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 29 [2018-06-22 19:07:31,748 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 33 [2018-06-22 19:07:32,594 WARN ]: Spent 796.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 45 [2018-06-22 19:07:32,610 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:07:32,610 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:32,610 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 19:07:32,623 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:07:32,790 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:07:32,790 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:32,797 INFO ]: Computing forward predicates... [2018-06-22 19:07:33,308 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 19:07:33,370 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:07:33,391 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:33,391 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 19:07:33,391 INFO ]: Interpolant automaton has 21 states [2018-06-22 19:07:33,391 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 19:07:33,391 INFO ]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:07:33,391 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 19:07:33,705 WARN ]: Spent 221.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 92 [2018-06-22 19:07:34,188 WARN ]: Spent 425.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 99 [2018-06-22 19:07:34,608 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 111 [2018-06-22 19:07:35,181 WARN ]: Spent 521.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 133 [2018-06-22 19:07:35,420 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 75 [2018-06-22 19:07:35,483 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:35,483 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:07:35,484 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:07:35,484 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 19:07:35,484 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:35,485 INFO ]: With dead ends: 21 [2018-06-22 19:07:35,485 INFO ]: Without dead ends: 21 [2018-06-22 19:07:35,485 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2018-06-22 19:07:35,485 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:07:35,488 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:07:35,488 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:07:35,489 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:07:35,489 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:07:35,489 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:35,489 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:07:35,489 INFO ]: Interpolant automaton has 21 states. [2018-06-22 19:07:35,489 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:07:35,490 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:07:35,490 INFO ]: Found error trace [2018-06-22 19:07:35,490 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:35,490 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:35,490 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:07:35,490 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:35,490 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:35,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:35,491 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:35,491 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:35,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:39,392 WARN ]: Spent 2.23 s on a formula simplification. DAG size of input: 215 DAG size of output: 23 [2018-06-22 19:07:40,151 WARN ]: Spent 721.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 27 [2018-06-22 19:07:42,002 WARN ]: Spent 1.71 s on a formula simplification. DAG size of input: 371 DAG size of output: 54 [2018-06-22 19:07:42,574 WARN ]: Spent 535.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 66 [2018-06-22 19:07:44,092 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 428 DAG size of output: 50 [2018-06-22 19:07:45,239 WARN ]: Spent 927.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 31 [2018-06-22 19:07:46,665 WARN ]: Spent 1.21 s on a formula simplification. DAG size of input: 392 DAG size of output: 43 [2018-06-22 19:07:49,239 WARN ]: Spent 2.28 s on a formula simplification. DAG size of input: 455 DAG size of output: 37 [2018-06-22 19:07:51,072 WARN ]: Spent 1.61 s on a formula simplification. DAG size of input: 425 DAG size of output: 31 [2018-06-22 19:07:51,097 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:07:51,119 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:51,119 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:07:51,125 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:07:51,357 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:07:51,368 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:51,377 INFO ]: Computing forward predicates... [2018-06-22 19:07:52,146 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:07:52,167 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:52,167 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2018-06-22 19:07:52,167 INFO ]: Interpolant automaton has 23 states [2018-06-22 19:07:52,167 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 19:07:52,167 INFO ]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2018-06-22 19:07:52,168 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 19:07:52,365 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2018-06-22 19:07:53,010 WARN ]: Spent 598.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 118 [2018-06-22 19:07:53,997 WARN ]: Spent 925.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 114 [2018-06-22 19:07:55,372 WARN ]: Spent 1.19 s on a formula simplification. DAG size of input: 295 DAG size of output: 148 [2018-06-22 19:07:57,305 WARN ]: Spent 1.86 s on a formula simplification. DAG size of input: 252 DAG size of output: 189 [2018-06-22 19:07:58,234 WARN ]: Spent 792.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 143 [2018-06-22 19:07:58,883 WARN ]: Spent 576.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 102 [2018-06-22 19:07:58,947 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:58,947 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:07:58,948 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:07:58,948 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 19:07:58,948 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:58,949 INFO ]: With dead ends: 23 [2018-06-22 19:07:58,949 INFO ]: Without dead ends: 23 [2018-06-22 19:07:58,950 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-06-22 19:07:58,950 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:07:58,953 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:07:58,953 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:07:58,954 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:07:58,954 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:07:58,954 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:58,954 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:07:58,954 INFO ]: Interpolant automaton has 23 states. [2018-06-22 19:07:58,954 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:07:58,955 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:07:58,955 INFO ]: Found error trace [2018-06-22 19:07:58,955 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:58,955 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:58,955 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:07:58,955 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:58,955 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:58,956 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:58,956 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:58,956 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:00,265 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown