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_3_e3_1275_e1_1350.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:13:37,832 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:13:37,835 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:13:37,849 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:13:37,849 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:13:37,850 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:13:37,851 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:13:37,853 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:13:37,855 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:13:37,855 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:13:37,857 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:13:37,858 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:13:37,858 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:13:37,859 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:13:37,862 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:13:37,862 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:13:37,864 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:13:37,874 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:13:37,875 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:13:37,876 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:13:37,877 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:13:37,879 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:13:37,883 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:13:37,883 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:13:37,884 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:13:37,885 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:13:37,885 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:13:37,886 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:13:37,890 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:13:37,891 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:13:37,891 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:13:37,892 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:13:37,892 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:13:37,893 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:13:37,894 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:13:37,895 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 19:13:37,916 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:13:37,916 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:13:37,916 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:13:37,916 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:13:37,917 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:13:37,918 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:13:37,918 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:13:37,918 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:13:37,918 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:13:37,918 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:13:37,919 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:13:37,921 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:13:37,922 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:13:37,922 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:13:37,922 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:13:37,922 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:13:37,922 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:13:37,923 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:13:37,923 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:13:37,924 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:13:37,924 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:13:37,974 INFO ]: Repository-Root is: /tmp [2018-06-22 19:13:37,991 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:13:37,996 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:13:37,998 INFO ]: Initializing SmtParser... [2018-06-22 19:13:37,998 INFO ]: SmtParser initialized [2018-06-22 19:13:37,999 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e1_1350.smt2 [2018-06-22 19:13:38,001 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 19:13:38,094 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e1_1350.smt2 unknown [2018-06-22 19:13:38,526 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_3_e3_1275_e1_1350.smt2 [2018-06-22 19:13:38,530 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:13:38,549 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:13:38,549 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:13:38,549 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:13:38,549 INFO ]: ChcToBoogie initialized [2018-06-22 19:13:38,552 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,659 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38 Unit [2018-06-22 19:13:38,659 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:13:38,660 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:13:38,660 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:13:38,660 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:13:38,686 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,686 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,697 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,697 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,710 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,712 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,723 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (1/1) ... [2018-06-22 19:13:38,726 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:13:38,726 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:13:38,726 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:13:38,727 INFO ]: RCFGBuilder initialized [2018-06-22 19:13:38,727 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (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 19:13:38,749 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:13:38,749 INFO ]: Found specification of procedure False [2018-06-22 19:13:38,749 INFO ]: Found implementation of procedure False [2018-06-22 19:13:38,749 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:13:38,749 INFO ]: Found specification of procedure state [2018-06-22 19:13:38,749 INFO ]: Found implementation of procedure state [2018-06-22 19:13:38,749 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:13:38,749 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:13:38,749 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 19:13:39,141 INFO ]: Using library mode [2018-06-22 19:13:39,142 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:13:39 BoogieIcfgContainer [2018-06-22 19:13:39,142 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:13:39,143 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:13:39,143 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:13:39,149 INFO ]: TraceAbstraction initialized [2018-06-22 19:13:39,149 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:13:38" (1/3) ... [2018-06-22 19:13:39,150 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6792f341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:13:39, skipping insertion in model container [2018-06-22 19:13:39,150 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:13:38" (2/3) ... [2018-06-22 19:13:39,150 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6792f341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:13:39, skipping insertion in model container [2018-06-22 19:13:39,150 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:13:39" (3/3) ... [2018-06-22 19:13:39,152 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:13:39,163 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:13:39,174 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:13:39,224 INFO ]: Using default assertion order modulation [2018-06-22 19:13:39,225 INFO ]: Interprodecural is true [2018-06-22 19:13:39,225 INFO ]: Hoare is false [2018-06-22 19:13:39,225 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:13:39,225 INFO ]: Backedges is TWOTRACK [2018-06-22 19:13:39,225 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:13:39,225 INFO ]: Difference is false [2018-06-22 19:13:39,225 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:13:39,225 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:13:39,240 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:13:39,256 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:13:39,256 INFO ]: Found error trace [2018-06-22 19:13:39,257 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:39,257 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:39,263 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:13:39,265 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:39,266 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:39,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:39,301 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:13:39,301 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:39,408 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:39,592 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:13:39,595 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:13:39,595 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:13:39,597 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:13:39,613 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:13:39,613 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:13:39,616 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:13:39,754 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:13:39,754 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:13:39,755 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:13:39,757 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:13:39,757 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:13:39,771 INFO ]: With dead ends: 13 [2018-06-22 19:13:39,771 INFO ]: Without dead ends: 13 [2018-06-22 19:13:39,774 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 19:13:39,792 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:13:39,813 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:13:39,815 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:13:39,815 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:13:39,816 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:13:39,817 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:13:39,817 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:13:39,817 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:13:39,817 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:13:39,818 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:13:39,818 INFO ]: Found error trace [2018-06-22 19:13:39,818 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:39,819 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:39,819 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:13:39,819 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:39,819 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:39,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:39,820 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:13:39,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:39,919 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:40,282 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:13:40,282 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:13:40,282 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) [2018-06-22 19:13:40,297 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:13:40,427 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:40,437 INFO ]: Computing forward predicates... [2018-06-22 19:13:40,793 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:13:41,073 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:13:41,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:13:41,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:13:41,109 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:13:41,109 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:13:41,109 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:13:41,109 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:13:41,334 WARN ]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 19:13:41,522 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:13:41,522 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:13:41,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:13:41,522 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:13:41,523 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:13:41,523 INFO ]: With dead ends: 15 [2018-06-22 19:13:41,523 INFO ]: Without dead ends: 15 [2018-06-22 19:13:41,524 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:13:41,524 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:13:41,527 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:13:41,527 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:13:41,528 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:13:41,528 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:13:41,528 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:13:41,528 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:13:41,528 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:13:41,528 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:13:41,529 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:13:41,529 INFO ]: Found error trace [2018-06-22 19:13:41,529 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:41,529 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:41,529 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:13:41,529 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:41,529 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:41,530 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:41,530 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:13:41,530 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:41,649 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:42,060 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:13:42,060 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:13:42,060 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 19:13:42,071 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:13:42,227 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:13:42,227 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:42,233 INFO ]: Computing forward predicates... [2018-06-22 19:13:42,518 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:13:42,596 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:13:42,596 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:13:42,597 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:13:42,597 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:13:42,597 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:13:42,597 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:13:43,043 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:13:43,043 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:13:43,044 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:13:43,044 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:13:43,044 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:13:43,045 INFO ]: With dead ends: 17 [2018-06-22 19:13:43,045 INFO ]: Without dead ends: 17 [2018-06-22 19:13:43,045 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:13:43,045 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:13:43,048 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:13:43,048 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:13:43,049 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:13:43,049 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:13:43,049 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:13:43,049 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:13:43,049 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:13:43,049 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:13:43,050 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:13:43,050 INFO ]: Found error trace [2018-06-22 19:13:43,050 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:43,050 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:43,050 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:13:43,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:43,050 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:43,051 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:43,051 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:13:43,051 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:43,170 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:43,847 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2018-06-22 19:13:44,068 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:13:44,068 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:13:44,068 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 19:13:44,084 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:13:44,258 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:13:44,258 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:44,265 INFO ]: Computing forward predicates... [2018-06-22 19:13:44,590 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:13:44,611 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:13:44,611 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:13:44,630 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:13:44,631 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:13:44,631 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:13:44,631 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:13:44,979 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 109 [2018-06-22 19:13:45,302 WARN ]: Spent 258.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 124 [2018-06-22 19:13:45,623 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 107 [2018-06-22 19:13:45,911 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 104 [2018-06-22 19:13:45,950 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:13:45,950 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:13:45,951 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:13:45,951 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:13:45,951 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:13:45,952 INFO ]: With dead ends: 19 [2018-06-22 19:13:45,952 INFO ]: Without dead ends: 19 [2018-06-22 19:13:45,952 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:13:45,952 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:13:45,955 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:13:45,955 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:13:45,956 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:13:45,956 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:13:45,956 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:13:45,956 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:13:45,956 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:13:45,956 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:13:45,957 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:13:45,957 INFO ]: Found error trace [2018-06-22 19:13:45,957 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:45,957 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:45,957 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:13:45,957 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:45,957 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:45,958 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:45,958 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:13:45,958 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:46,083 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:46,501 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:13:46,819 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2018-06-22 19:13:46,968 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2018-06-22 19:13:47,346 WARN ]: Spent 360.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2018-06-22 19:13:47,549 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2018-06-22 19:13:47,682 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 24 [2018-06-22 19:13:47,808 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:13:47,809 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:13:47,809 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 19:13:47,814 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:13:47,987 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:13:47,988 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:47,997 INFO ]: Computing forward predicates... [2018-06-22 19:13:48,595 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:13:48,646 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:13:48,646 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:13:48,647 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:13:48,647 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:13:48,647 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:13:48,647 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:13:48,942 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2018-06-22 19:13:49,273 WARN ]: Spent 283.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 105 [2018-06-22 19:13:49,517 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 83 [2018-06-22 19:13:49,747 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2018-06-22 19:13:50,008 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2018-06-22 19:13:50,046 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:13:50,046 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:13:50,047 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:13:50,047 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:13:50,047 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:13:50,047 INFO ]: With dead ends: 21 [2018-06-22 19:13:50,047 INFO ]: Without dead ends: 21 [2018-06-22 19:13:50,048 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:13:50,048 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:13:50,052 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:13:50,052 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:13:50,053 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:13:50,053 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:13:50,053 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:13:50,053 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:13:50,053 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:13:50,053 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:13:50,058 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:13:50,058 INFO ]: Found error trace [2018-06-22 19:13:50,058 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:13:50,058 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:13:50,058 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:13:50,058 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:13:50,058 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:13:50,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:50,059 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:13:50,059 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:13:50,331 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:51,209 WARN ]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:13:52,744 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 204 DAG size of output: 34 [2018-06-22 19:13:53,781 WARN ]: Spent 996.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 47 [2018-06-22 19:13:54,257 WARN ]: Spent 337.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 30 [2018-06-22 19:13:55,617 WARN ]: Spent 1.28 s on a formula simplification. DAG size of input: 155 DAG size of output: 45 [2018-06-22 19:13:56,486 WARN ]: Spent 796.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 43 [2018-06-22 19:13:57,159 WARN ]: Spent 591.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 26 [2018-06-22 19:13:58,656 WARN ]: Spent 1.33 s on a formula simplification. DAG size of input: 352 DAG size of output: 34 [2018-06-22 19:13:59,250 WARN ]: Spent 452.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 10 [2018-06-22 19:13:59,268 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:13:59,268 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:13:59,268 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 19:13:59,277 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:13:59,612 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:13:59,612 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:13:59,629 INFO ]: Computing forward predicates... [2018-06-22 19:14:00,249 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:14:00,270 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:14:00,270 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 19:14:00,270 INFO ]: Interpolant automaton has 25 states [2018-06-22 19:14:00,271 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 19:14:00,271 INFO ]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2018-06-22 19:14:00,271 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 19:14:00,742 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 116 [2018-06-22 19:14:01,348 WARN ]: Spent 539.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 148 [2018-06-22 19:14:01,947 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 129 [2018-06-22 19:14:02,429 WARN ]: Spent 438.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 133 [2018-06-22 19:14:02,827 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 112 [2018-06-22 19:14:03,206 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 106 [2018-06-22 19:14:03,277 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:14:03,277 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:14:03,278 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:14:03,278 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 19:14:03,278 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:14:03,279 INFO ]: With dead ends: 23 [2018-06-22 19:14:03,279 INFO ]: Without dead ends: 23 [2018-06-22 19:14:03,279 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2018-06-22 19:14:03,279 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:14:03,282 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:14:03,282 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:14:03,283 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:14:03,283 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:14:03,283 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:14:03,283 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:14:03,283 INFO ]: Interpolant automaton has 25 states. [2018-06-22 19:14:03,283 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:14:03,284 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:14:03,284 INFO ]: Found error trace [2018-06-22 19:14:03,284 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:14:03,284 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:14:03,284 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:14:03,284 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:14:03,284 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:14:03,285 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:14:03,285 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:14:03,285 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:14:04,430 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:14:06,779 WARN ]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:14:28,388 WARN ]: Spent 20.98 s on a formula simplification. DAG size of input: 786 DAG size of output: 39 [2018-06-22 19:14:33,615 WARN ]: Spent 4.98 s on a formula simplification. DAG size of input: 739 DAG size of output: 45 [2018-06-22 19:14:40,806 WARN ]: Spent 6.86 s on a formula simplification. DAG size of input: 923 DAG size of output: 62 Received shutdown request... [2018-06-22 19:14:44,933 WARN ]: Removed 2 from assertion stack [2018-06-22 19:14:44,933 WARN ]: Verification canceled [2018-06-22 19:14:44,936 WARN ]: Timeout [2018-06-22 19:14:44,937 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:14:44 BoogieIcfgContainer [2018-06-22 19:14:44,937 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 19:14:44,937 INFO ]: Toolchain (without parser) took 66406.35 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 243.1 MB in the beginning and 454.1 MB in the end (delta: -211.1 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 19:14:44,938 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 269.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 19:14:44,938 INFO ]: ChcToBoogie took 109.94 ms. Allocated memory is still 304.6 MB. Free memory was 243.1 MB in the beginning and 241.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:14:44,938 INFO ]: Boogie Preprocessor took 66.48 ms. Allocated memory is still 304.6 MB. Free memory was 241.1 MB in the beginning and 239.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:14:44,939 INFO ]: RCFGBuilder took 415.70 ms. Allocated memory is still 304.6 MB. Free memory was 239.1 MB in the beginning and 215.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-22 19:14:44,939 INFO ]: TraceAbstraction took 65793.27 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 215.1 MB in the beginning and 454.1 MB in the end (delta: -239.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 19:14:44,941 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 269.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 109.94 ms. Allocated memory is still 304.6 MB. Free memory was 243.1 MB in the beginning and 241.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 66.48 ms. Allocated memory is still 304.6 MB. Free memory was 241.1 MB in the beginning and 239.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 415.70 ms. Allocated memory is still 304.6 MB. Free memory was 239.1 MB in the beginning and 215.1 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65793.27 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 215.1 MB in the beginning and 454.1 MB in the end (delta: -239.0 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 7, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 432. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 65.7s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 6.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 65 SDtfs, 129 SDslu, 433 SDs, 0 SdLazy, 335 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 18.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 59932 SizeOfPredicates, 143 NumberOfNonLiveVariables, 4435 ConjunctsInSsa, 190 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 71/250 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e3_1275_e1_1350.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_19-14-44-949.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_3_e3_1275_e1_1350.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_19-14-44-949.csv Completed graceful shutdown