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_e3_287.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:07:17,619 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:07:17,621 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:07:17,633 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:07:17,633 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:07:17,636 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:07:17,638 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:07:17,643 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:07:17,645 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:07:17,648 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:07:17,649 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:07:17,650 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:07:17,650 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:07:17,652 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:07:17,652 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:07:17,655 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:07:17,657 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:07:17,665 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:07:17,666 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:07:17,667 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:07:17,677 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:07:17,679 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:07:17,680 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:07:17,680 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:07:17,681 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:07:17,682 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:07:17,682 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:07:17,686 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:07:17,687 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:07:17,687 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:07:17,688 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:07:17,689 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:07:17,689 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:07:17,690 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:07:17,697 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:07:17,697 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 19:07:17,711 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:07:17,712 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:07:17,712 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:07:17,712 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:07:17,713 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:07:17,714 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:07:17,714 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:07:17,714 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:07:17,714 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:07:17,714 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:07:17,715 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:07:17,715 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:07:17,715 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:07:17,715 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:07:17,715 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:07:17,716 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:07:17,716 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:07:17,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:07:17,716 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:07:17,717 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:07:17,718 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:07:17,774 INFO ]: Repository-Root is: /tmp [2018-06-22 19:07:17,796 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:07:17,802 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:07:17,804 INFO ]: Initializing SmtParser... [2018-06-22 19:07:17,804 INFO ]: SmtParser initialized [2018-06-22 19:07:17,805 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 [2018-06-22 19:07:17,807 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 19:07:17,902 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 unknown [2018-06-22 19:07:18,520 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116_e3_287.smt2 [2018-06-22 19:07:18,530 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:07:18,543 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:07:18,543 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:07:18,543 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:07:18,543 INFO ]: ChcToBoogie initialized [2018-06-22 19:07:18,546 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,618 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18 Unit [2018-06-22 19:07:18,618 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:07:18,619 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:07:18,619 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:07:18,619 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:07:18,644 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,644 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,656 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,657 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,671 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,672 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,683 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (1/1) ... [2018-06-22 19:07:18,687 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:07:18,687 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:07:18,687 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:07:18,687 INFO ]: RCFGBuilder initialized [2018-06-22 19:07:18,688 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (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 19:07:18,713 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:07:18,714 INFO ]: Found specification of procedure False [2018-06-22 19:07:18,714 INFO ]: Found implementation of procedure False [2018-06-22 19:07:18,714 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:07:18,714 INFO ]: Found specification of procedure state [2018-06-22 19:07:18,714 INFO ]: Found implementation of procedure state [2018-06-22 19:07:18,714 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:07:18,714 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:07:18,714 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 19:07:19,159 INFO ]: Using library mode [2018-06-22 19:07:19,161 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:07:19 BoogieIcfgContainer [2018-06-22 19:07:19,161 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:07:19,162 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:07:19,162 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:07:19,166 INFO ]: TraceAbstraction initialized [2018-06-22 19:07:19,166 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:07:18" (1/3) ... [2018-06-22 19:07:19,167 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ff7f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:07:19, skipping insertion in model container [2018-06-22 19:07:19,167 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:07:18" (2/3) ... [2018-06-22 19:07:19,167 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18ff7f5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:07:19, skipping insertion in model container [2018-06-22 19:07:19,167 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:07:19" (3/3) ... [2018-06-22 19:07:19,170 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:07:19,180 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:07:19,190 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:07:19,242 INFO ]: Using default assertion order modulation [2018-06-22 19:07:19,243 INFO ]: Interprodecural is true [2018-06-22 19:07:19,243 INFO ]: Hoare is false [2018-06-22 19:07:19,243 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:07:19,243 INFO ]: Backedges is TWOTRACK [2018-06-22 19:07:19,243 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:07:19,243 INFO ]: Difference is false [2018-06-22 19:07:19,243 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:07:19,243 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:07:19,261 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:07:19,283 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:07:19,283 INFO ]: Found error trace [2018-06-22 19:07:19,284 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:19,284 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:19,290 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:07:19,292 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:19,292 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:19,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:19,331 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:19,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:19,439 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:19,627 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:07:19,629 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:07:19,629 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:07:19,631 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:07:19,642 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:07:19,643 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:07:19,644 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:07:19,764 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:19,764 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:07:19,765 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:07:19,766 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:07:19,766 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:19,775 INFO ]: With dead ends: 13 [2018-06-22 19:07:19,775 INFO ]: Without dead ends: 13 [2018-06-22 19:07:19,777 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 19:07:19,790 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:07:19,827 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:07:19,828 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:07:19,828 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:07:19,829 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:07:19,829 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:19,829 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:07:19,829 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:07:19,829 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:07:19,830 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:07:19,830 INFO ]: Found error trace [2018-06-22 19:07:19,830 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:19,831 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:19,831 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:07:19,831 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:19,831 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:19,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:19,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:19,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:19,909 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:20,670 WARN ]: Spent 579.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-22 19:07:20,711 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:07:20,712 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:20,712 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 19:07:20,718 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:20,865 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:20,876 INFO ]: Computing forward predicates... [2018-06-22 19:07:21,332 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-22 19:07:21,400 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:07:21,454 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:21,454 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:07:21,455 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:07:21,455 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:07:21,455 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:07:21,455 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:07:21,854 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:07:22,300 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-06-22 19:07:22,420 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:22,436 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:07:22,437 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:07:22,437 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:07:22,437 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:22,437 INFO ]: With dead ends: 15 [2018-06-22 19:07:22,438 INFO ]: Without dead ends: 15 [2018-06-22 19:07:22,438 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:07:22,439 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:07:22,441 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:07:22,441 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:07:22,442 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:07:22,442 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:07:22,442 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:22,442 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:07:22,442 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:07:22,442 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:07:22,442 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:07:22,443 INFO ]: Found error trace [2018-06-22 19:07:22,443 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:22,443 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:22,443 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:07:22,443 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:22,443 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:22,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:22,444 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:07:22,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:22,580 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:22,989 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2018-06-22 19:07:23,079 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:07:23,079 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:23,079 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 19:07:23,088 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:07:23,223 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:07:23,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:23,229 INFO ]: Computing forward predicates... [2018-06-22 19:07:23,544 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:07:23,573 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:23,573 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:07:23,573 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:07:23,574 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:07:23,574 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:07:23,574 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:07:23,729 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2018-06-22 19:07:23,992 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2018-06-22 19:07:24,148 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2018-06-22 19:07:24,201 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:24,201 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:07:24,203 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:07:24,203 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:07:24,203 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:24,204 INFO ]: With dead ends: 17 [2018-06-22 19:07:24,204 INFO ]: Without dead ends: 17 [2018-06-22 19:07:24,206 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:07:24,206 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:07:24,209 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:07:24,210 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:07:24,210 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:07:24,210 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:07:24,210 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:24,210 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:07:24,210 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:07:24,210 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:07:24,211 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:07:24,211 INFO ]: Found error trace [2018-06-22 19:07:24,211 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:24,211 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:24,211 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:07:24,211 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:24,211 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:24,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:24,212 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:24,212 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:24,363 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:25,178 WARN ]: Spent 469.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2018-06-22 19:07:25,546 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 54 [2018-06-22 19:07:25,782 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2018-06-22 19:07:25,977 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2018-06-22 19:07:26,188 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 31 [2018-06-22 19:07:26,217 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:07:26,218 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:26,218 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 19:07:26,226 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:07:26,348 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:07:26,348 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:26,356 INFO ]: Computing forward predicates... [2018-06-22 19:07:26,732 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:07:26,753 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:26,753 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:07:26,753 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:07:26,753 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:07:26,754 INFO ]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:07:26,754 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:07:27,331 WARN ]: Spent 532.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 118 [2018-06-22 19:07:27,795 WARN ]: Spent 345.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 117 [2018-06-22 19:07:28,053 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 97 [2018-06-22 19:07:28,400 WARN ]: Spent 305.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 95 [2018-06-22 19:07:28,450 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:28,450 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:07:28,451 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:07:28,451 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:07:28,452 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:28,452 INFO ]: With dead ends: 19 [2018-06-22 19:07:28,452 INFO ]: Without dead ends: 19 [2018-06-22 19:07:28,453 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:07:28,453 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:07:28,455 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:07:28,455 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:07:28,456 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:07:28,456 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:07:28,456 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:28,456 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:07:28,456 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:07:28,456 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:07:28,457 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:07:28,457 INFO ]: Found error trace [2018-06-22 19:07:28,457 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:28,457 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:28,457 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 19:07:28,457 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:28,457 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:28,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:28,458 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:28,458 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:28,629 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:29,372 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 22 [2018-06-22 19:07:29,533 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 42 [2018-06-22 19:07:30,210 WARN ]: Spent 545.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 51 [2018-06-22 19:07:30,913 WARN ]: Spent 673.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 56 [2018-06-22 19:07:31,506 WARN ]: Spent 471.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 29 [2018-06-22 19:07:32,337 WARN ]: Spent 692.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 37 [2018-06-22 19:07:32,683 WARN ]: Spent 274.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 34 [2018-06-22 19:07:32,698 INFO ]: Checked inductivity of 36 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:07:32,699 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:07:32,699 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 19:07:32,704 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:07:32,856 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:07:32,856 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:32,863 INFO ]: Computing forward predicates... [2018-06-22 19:07:33,203 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:07:33,229 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:07:33,229 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:07:33,230 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:07:33,230 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:07:33,230 INFO ]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:07:33,230 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:07:33,642 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 99 [2018-06-22 19:07:34,415 WARN ]: Spent 622.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 105 [2018-06-22 19:07:35,086 WARN ]: Spent 628.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 117 [2018-06-22 19:07:35,796 WARN ]: Spent 645.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 118 [2018-06-22 19:07:36,166 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 81 [2018-06-22 19:07:36,231 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:07:36,231 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:07:36,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:07:36,238 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:07:36,238 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:07:36,239 INFO ]: With dead ends: 21 [2018-06-22 19:07:36,239 INFO ]: Without dead ends: 21 [2018-06-22 19:07:36,239 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:07:36,240 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:07:36,242 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:07:36,242 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:07:36,243 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:07:36,243 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:07:36,243 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:07:36,243 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:07:36,243 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:07:36,243 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:07:36,244 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:07:36,244 INFO ]: Found error trace [2018-06-22 19:07:36,244 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:07:36,244 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:07:36,244 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 19:07:36,244 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:07:36,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:07:36,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:36,245 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:07:36,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:07:36,570 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:07:45,850 WARN ]: Spent 530.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 22 [2018-06-22 19:07:47,022 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 373 DAG size of output: 52 [2018-06-22 19:07:50,164 WARN ]: Spent 3.01 s on a formula simplification. DAG size of input: 508 DAG size of output: 75 [2018-06-22 19:07:53,969 WARN ]: Spent 3.64 s on a formula simplification. DAG size of input: 285 DAG size of output: 83 [2018-06-22 19:07:55,068 WARN ]: Spent 1.04 s on a formula simplification. DAG size of input: 194 DAG size of output: 55 [2018-06-22 19:07:56,153 WARN ]: Spent 942.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 40 [2018-06-22 19:07:58,254 WARN ]: Spent 1.93 s on a formula simplification. DAG size of input: 427 DAG size of output: 68 [2018-06-22 19:08:01,921 WARN ]: Spent 3.41 s on a formula simplification. DAG size of input: 643 DAG size of output: 78 [2018-06-22 19:08:03,653 WARN ]: Spent 1.46 s on a formula simplification. DAG size of input: 477 DAG size of output: 35 [2018-06-22 19:08:03,679 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:08:03,679 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:08:03,679 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 19:08:03,686 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:08:03,919 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:08:03,919 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:03,929 INFO ]: Computing forward predicates... [2018-06-22 19:08:04,715 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2018-06-22 19:08:04,835 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:08:04,856 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:08:04,856 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-22 19:08:04,856 INFO ]: Interpolant automaton has 24 states [2018-06-22 19:08:04,856 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 19:08:04,856 INFO ]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2018-06-22 19:08:04,856 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 19:08:05,633 WARN ]: Spent 689.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 158 [2018-06-22 19:08:07,169 WARN ]: Spent 1.29 s on a formula simplification. DAG size of input: 314 DAG size of output: 203 [2018-06-22 19:08:08,849 WARN ]: Spent 1.61 s on a formula simplification. DAG size of input: 315 DAG size of output: 232 [2018-06-22 19:08:10,236 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 288 DAG size of output: 222 [2018-06-22 19:08:11,057 WARN ]: Spent 726.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 174 [2018-06-22 19:08:11,687 WARN ]: Spent 549.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 139 [2018-06-22 19:08:11,873 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:11,873 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:08:11,876 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:08:11,876 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 19:08:11,876 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:11,876 INFO ]: With dead ends: 23 [2018-06-22 19:08:11,876 INFO ]: Without dead ends: 23 [2018-06-22 19:08:11,877 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=178, Invalid=752, Unknown=0, NotChecked=0, Total=930 [2018-06-22 19:08:11,877 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:08:11,885 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:08:11,885 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:08:11,885 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:08:11,885 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:08:11,886 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:11,886 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:08:11,886 INFO ]: Interpolant automaton has 24 states. [2018-06-22 19:08:11,886 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:08:11,886 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:08:11,886 INFO ]: Found error trace [2018-06-22 19:08:11,886 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:11,886 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:11,887 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 19:08:11,887 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:11,887 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:11,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:11,887 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:08:11,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:12,880 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown