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/ctigar/dillig33.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:00:21,943 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:00:21,945 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:00:21,958 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:00:21,958 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:00:21,959 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:00:21,960 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:00:21,963 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:00:21,964 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:00:21,966 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:00:21,967 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:00:21,967 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:00:21,968 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:00:21,969 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:00:21,970 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:00:21,971 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:00:21,973 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:00:21,975 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:00:21,976 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:00:21,977 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:00:21,978 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:00:21,980 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:00:21,981 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:00:21,981 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:00:21,982 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:00:21,983 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:00:21,983 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:00:21,984 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:00:21,985 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:00:21,985 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:00:21,986 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:00:21,987 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:00:21,987 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:00:21,988 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:00:21,988 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:00:21,989 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 15:00:22,001 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:00:22,002 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:00:22,002 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:00:22,002 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:00:22,003 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:00:22,004 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:00:22,004 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:00:22,004 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:00:22,004 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:00:22,004 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:00:22,005 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:00:22,005 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:00:22,005 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:00:22,005 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:00:22,005 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:00:22,006 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:00:22,006 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:00:22,006 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:00:22,006 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:00:22,007 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:00:22,008 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:00:22,045 INFO ]: Repository-Root is: /tmp [2018-06-22 15:00:22,061 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:00:22,066 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:00:22,068 INFO ]: Initializing SmtParser... [2018-06-22 15:00:22,068 INFO ]: SmtParser initialized [2018-06-22 15:00:22,069 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig33.c.smt2 [2018-06-22 15:00:22,070 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 15:00:22,160 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig33.c.smt2 unknown [2018-06-22 15:00:22,438 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig33.c.smt2 [2018-06-22 15:00:22,443 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:00:22,448 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:00:22,449 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:00:22,449 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:00:22,449 INFO ]: ChcToBoogie initialized [2018-06-22 15:00:22,455 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,511 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22 Unit [2018-06-22 15:00:22,511 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:00:22,512 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:00:22,512 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:00:22,512 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:00:22,535 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,535 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,552 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,552 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,556 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,557 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,568 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... [2018-06-22 15:00:22,570 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:00:22,571 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:00:22,571 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:00:22,571 INFO ]: RCFGBuilder initialized [2018-06-22 15:00:22,572 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 15:00:22,589 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:00:22,589 INFO ]: Found specification of procedure False [2018-06-22 15:00:22,589 INFO ]: Found implementation of procedure False [2018-06-22 15:00:22,589 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:00:22,589 INFO ]: Found specification of procedure state [2018-06-22 15:00:22,589 INFO ]: Found implementation of procedure state [2018-06-22 15:00:22,589 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:00:22,589 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:00:22,589 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 15:00:22,758 INFO ]: Using library mode [2018-06-22 15:00:22,758 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:00:22 BoogieIcfgContainer [2018-06-22 15:00:22,758 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:00:22,760 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:00:22,760 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:00:22,763 INFO ]: TraceAbstraction initialized [2018-06-22 15:00:22,763 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:00:22" (1/3) ... [2018-06-22 15:00:22,764 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c59a3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:00:22, skipping insertion in model container [2018-06-22 15:00:22,764 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:00:22" (2/3) ... [2018-06-22 15:00:22,764 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c59a3df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:00:22, skipping insertion in model container [2018-06-22 15:00:22,764 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:00:22" (3/3) ... [2018-06-22 15:00:22,766 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:00:22,774 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:00:22,782 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:00:22,830 INFO ]: Using default assertion order modulation [2018-06-22 15:00:22,831 INFO ]: Interprodecural is true [2018-06-22 15:00:22,831 INFO ]: Hoare is false [2018-06-22 15:00:22,831 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:00:22,831 INFO ]: Backedges is TWOTRACK [2018-06-22 15:00:22,831 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:00:22,831 INFO ]: Difference is false [2018-06-22 15:00:22,831 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:00:22,831 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:00:22,843 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:00:22,854 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:00:22,854 INFO ]: Found error trace [2018-06-22 15:00:22,855 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:22,855 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:22,859 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:00:22,861 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:22,861 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:22,901 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:22,901 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:22,901 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:22,939 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:23,055 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:00:23,058 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:00:23,058 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:00:23,059 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:00:23,075 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:00:23,075 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:00:23,078 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:00:23,204 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:23,204 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:00:23,205 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:00:23,206 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:00:23,207 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:23,216 INFO ]: With dead ends: 13 [2018-06-22 15:00:23,217 INFO ]: Without dead ends: 13 [2018-06-22 15:00:23,219 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 15:00:23,232 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:00:23,254 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:00:23,255 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:00:23,255 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:00:23,256 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:00:23,256 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:23,256 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:00:23,256 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:00:23,257 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:00:23,258 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:00:23,258 INFO ]: Found error trace [2018-06-22 15:00:23,258 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:23,258 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:23,258 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:00:23,258 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:23,258 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:23,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:23,259 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:23,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:23,309 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:23,558 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:00:23,558 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:23,558 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 15:00:23,568 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:23,619 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:23,629 INFO ]: Computing forward predicates... [2018-06-22 15:00:23,987 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:00:24,021 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:24,021 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:00:24,021 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:00:24,022 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:00:24,022 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:00:24,023 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:00:24,199 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:24,199 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:00:24,200 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:00:24,200 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:00:24,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:24,200 INFO ]: With dead ends: 15 [2018-06-22 15:00:24,200 INFO ]: Without dead ends: 15 [2018-06-22 15:00:24,201 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:00:24,201 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:00:24,205 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:00:24,205 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:00:24,206 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:00:24,206 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:00:24,206 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:24,206 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:00:24,206 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:00:24,206 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:00:24,207 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:00:24,207 INFO ]: Found error trace [2018-06-22 15:00:24,207 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:24,207 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:24,207 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:00:24,207 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:24,207 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:24,208 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:24,208 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:24,208 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:24,276 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:24,787 WARN ]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:00:25,066 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:00:25,303 WARN ]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:00:25,316 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:00:25,316 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:25,316 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 15:00:25,325 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:00:25,390 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:00:25,390 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:25,393 INFO ]: Computing forward predicates... [2018-06-22 15:00:25,609 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:00:25,629 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:25,629 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:00:25,629 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:00:25,629 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:00:25,629 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:00:25,630 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:00:25,785 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2018-06-22 15:00:26,246 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 15:00:26,261 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:26,261 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:00:26,262 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:00:26,262 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:00:26,262 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:26,262 INFO ]: With dead ends: 17 [2018-06-22 15:00:26,262 INFO ]: Without dead ends: 17 [2018-06-22 15:00:26,262 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:00:26,262 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:00:26,265 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:00:26,265 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:00:26,265 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:00:26,265 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:00:26,265 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:26,266 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:00:26,266 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:00:26,266 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:00:26,266 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:00:26,266 INFO ]: Found error trace [2018-06-22 15:00:26,266 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:26,266 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:26,267 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:00:26,267 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:26,267 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:26,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:26,267 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:00:26,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:26,300 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:26,530 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:00:26,530 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:26,530 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 15:00:26,539 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:00:26,599 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:00:26,599 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:26,603 INFO ]: Computing forward predicates... [2018-06-22 15:00:26,893 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:00:26,919 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:26,919 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:00:26,920 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:00:26,920 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:00:26,920 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:00:26,920 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:00:27,045 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 23 [2018-06-22 15:00:27,336 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2018-06-22 15:00:27,354 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:27,354 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:00:27,355 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:00:27,355 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:00:27,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:27,355 INFO ]: With dead ends: 19 [2018-06-22 15:00:27,355 INFO ]: Without dead ends: 19 [2018-06-22 15:00:27,356 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:00:27,356 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:00:27,359 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:00:27,359 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:00:27,359 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:00:27,359 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:00:27,360 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:27,360 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:00:27,360 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:00:27,360 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:00:27,360 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:00:27,360 INFO ]: Found error trace [2018-06-22 15:00:27,360 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:27,361 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:27,361 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:00:27,361 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:27,361 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:27,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:27,362 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:00:27,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:27,427 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:27,896 WARN ]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:00:27,992 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:00:27,992 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:27,993 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 15:00:28,004 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:00:28,042 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:00:28,042 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:28,046 INFO ]: Computing forward predicates... [2018-06-22 15:00:28,426 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:00:28,446 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:28,446 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 15:00:28,446 INFO ]: Interpolant automaton has 19 states [2018-06-22 15:00:28,447 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 15:00:28,447 INFO ]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:00:28,447 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 15:00:28,985 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-22 15:00:29,104 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:29,104 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:00:29,107 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:00:29,107 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 15:00:29,107 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:29,108 INFO ]: With dead ends: 21 [2018-06-22 15:00:29,108 INFO ]: Without dead ends: 21 [2018-06-22 15:00:29,109 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:00:29,109 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:00:29,112 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:00:29,112 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:00:29,113 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:00:29,113 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:00:29,113 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:29,113 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:00:29,113 INFO ]: Interpolant automaton has 19 states. [2018-06-22 15:00:29,113 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:00:29,114 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:00:29,114 INFO ]: Found error trace [2018-06-22 15:00:29,114 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:29,114 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:29,114 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:00:29,114 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:29,114 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:29,115 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:29,115 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:00:29,115 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:29,173 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:29,691 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:00:29,691 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:29,691 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 15:00:29,697 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:00:29,749 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:00:29,749 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:29,754 INFO ]: Computing forward predicates... [2018-06-22 15:00:30,556 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:00:30,575 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:30,575 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 15:00:30,576 INFO ]: Interpolant automaton has 22 states [2018-06-22 15:00:30,576 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 15:00:30,576 INFO ]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:00:30,576 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 22 states. [2018-06-22 15:00:30,936 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2018-06-22 15:00:31,387 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2018-06-22 15:00:31,638 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41 [2018-06-22 15:00:31,858 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-06-22 15:00:31,893 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:31,893 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:00:31,896 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:00:31,896 INFO ]: Start accepts. Automaton has 22 states. Word has length 29 [2018-06-22 15:00:31,896 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:31,897 INFO ]: With dead ends: 23 [2018-06-22 15:00:31,897 INFO ]: Without dead ends: 23 [2018-06-22 15:00:31,897 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:00:31,897 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:00:31,901 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:00:31,901 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:00:31,902 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:00:31,902 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:00:31,902 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:31,902 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:00:31,902 INFO ]: Interpolant automaton has 22 states. [2018-06-22 15:00:31,902 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:00:31,903 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:00:31,903 INFO ]: Found error trace [2018-06-22 15:00:31,903 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:31,903 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:31,903 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:00:31,903 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:31,903 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:31,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:31,904 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:00:31,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:32,018 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:32,480 WARN ]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 15:00:32,649 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2018-06-22 15:00:33,060 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:00:33,060 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:33,060 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:00:33,067 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:00:33,166 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:00:33,166 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:33,171 INFO ]: Computing forward predicates... [2018-06-22 15:00:33,900 WARN ]: Spent 451.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 26 [2018-06-22 15:00:34,161 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2018-06-22 15:00:36,899 WARN ]: Spent 2.37 s on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-06-22 15:00:37,435 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:00:37,470 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:37,470 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2018-06-22 15:00:37,471 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:00:37,471 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:00:37,471 INFO ]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:00:37,471 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 25 states. [2018-06-22 15:00:38,017 WARN ]: Spent 505.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 72 [2018-06-22 15:00:38,245 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 31 [2018-06-22 15:00:38,448 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 34 [2018-06-22 15:00:38,829 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2018-06-22 15:00:39,103 WARN ]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 42 [2018-06-22 15:00:39,562 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 45 [2018-06-22 15:00:40,165 WARN ]: Spent 492.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2018-06-22 15:00:40,440 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:40,440 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:00:40,440 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:00:40,440 INFO ]: Start accepts. Automaton has 25 states. Word has length 33 [2018-06-22 15:00:40,441 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:40,441 INFO ]: With dead ends: 25 [2018-06-22 15:00:40,441 INFO ]: Without dead ends: 25 [2018-06-22 15:00:40,442 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:00:40,442 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:00:40,445 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:00:40,445 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:00:40,445 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:00:40,445 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:00:40,446 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:40,446 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:00:40,446 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:00:40,446 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:00:40,447 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:00:40,447 INFO ]: Found error trace [2018-06-22 15:00:40,447 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:40,447 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:40,447 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:00:40,447 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:40,447 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:40,447 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:40,448 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:00:40,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:40,513 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:41,482 WARN ]: Spent 633.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2018-06-22 15:00:42,100 WARN ]: Spent 278.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2018-06-22 15:00:42,381 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:00:42,381 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:42,381 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:00:42,387 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:42,443 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:42,449 INFO ]: Computing forward predicates... [2018-06-22 15:00:43,200 WARN ]: Spent 581.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 45 [2018-06-22 15:00:44,726 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:00:44,745 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:44,745 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 26 [2018-06-22 15:00:44,745 INFO ]: Interpolant automaton has 26 states [2018-06-22 15:00:44,746 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 15:00:44,746 INFO ]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2018-06-22 15:00:44,746 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 26 states. [2018-06-22 15:00:45,538 WARN ]: Spent 755.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2018-06-22 15:00:45,816 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 41 [2018-06-22 15:00:46,073 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 46 [2018-06-22 15:00:46,486 WARN ]: Spent 382.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 60 [2018-06-22 15:00:46,798 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 47 [2018-06-22 15:00:47,272 WARN ]: Spent 442.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 68 [2018-06-22 15:00:47,769 WARN ]: Spent 463.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 71 [2018-06-22 15:00:48,581 WARN ]: Spent 746.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 99 [2018-06-22 15:00:48,665 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:00:48,665 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:00:48,665 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:00:48,665 INFO ]: Start accepts. Automaton has 26 states. Word has length 37 [2018-06-22 15:00:48,665 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:00:48,666 INFO ]: With dead ends: 27 [2018-06-22 15:00:48,666 INFO ]: Without dead ends: 27 [2018-06-22 15:00:48,667 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:00:48,667 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:00:48,670 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:00:48,670 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:00:48,672 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:00:48,672 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:00:48,672 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:00:48,672 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:00:48,672 INFO ]: Interpolant automaton has 26 states. [2018-06-22 15:00:48,672 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:00:48,673 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:00:48,674 INFO ]: Found error trace [2018-06-22 15:00:48,674 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:00:48,674 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:00:48,674 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:00:48,674 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:00:48,674 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:00:48,675 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:48,675 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:00:48,675 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:00:48,751 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:49,274 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2018-06-22 15:00:49,507 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-22 15:00:50,016 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:00:50,017 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:00:50,017 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:00:50,022 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:00:50,084 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:00:50,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:00:50,091 INFO ]: Computing forward predicates... [2018-06-22 15:00:53,828 WARN ]: Spent 3.45 s on a formula simplification. DAG size of input: 374 DAG size of output: 86 [2018-06-22 15:00:54,728 WARN ]: Spent 821.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2018-06-22 15:00:55,442 WARN ]: Spent 576.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 41 [2018-06-22 15:00:55,809 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-22 15:00:56,064 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-06-22 15:00:59,958 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:00:59,977 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:00:59,977 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-22 15:00:59,978 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:00:59,978 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:00:59,978 INFO ]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:00:59,978 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-22 15:01:01,594 WARN ]: Spent 1.53 s on a formula simplification. DAG size of input: 198 DAG size of output: 142 [2018-06-22 15:01:02,427 WARN ]: Spent 759.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 33 [2018-06-22 15:01:03,364 WARN ]: Spent 892.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 70 [2018-06-22 15:01:04,607 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 192 DAG size of output: 54 [2018-06-22 15:01:05,559 WARN ]: Spent 892.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 46 [2018-06-22 15:01:06,431 WARN ]: Spent 822.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 61 [2018-06-22 15:01:07,922 WARN ]: Spent 1.42 s on a formula simplification. DAG size of input: 206 DAG size of output: 89 [2018-06-22 15:01:09,176 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 203 DAG size of output: 90 [2018-06-22 15:01:10,732 WARN ]: Spent 1.46 s on a formula simplification. DAG size of input: 199 DAG size of output: 140 [2018-06-22 15:01:10,779 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:01:10,779 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:01:10,780 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:01:10,780 INFO ]: Start accepts. Automaton has 32 states. Word has length 41 [2018-06-22 15:01:10,780 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:01:10,781 INFO ]: With dead ends: 29 [2018-06-22 15:01:10,781 INFO ]: Without dead ends: 29 [2018-06-22 15:01:10,781 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:01:10,781 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:01:10,785 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:01:10,785 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:01:10,785 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:01:10,785 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:01:10,786 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:01:10,786 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:01:10,786 INFO ]: Interpolant automaton has 32 states. [2018-06-22 15:01:10,786 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:01:10,787 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:01:10,787 INFO ]: Found error trace [2018-06-22 15:01:10,787 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:01:10,787 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:01:10,787 INFO ]: Analyzing trace with hash 1442343014, now seen corresponding path program 9 times [2018-06-22 15:01:10,787 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:01:10,787 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:01:10,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:01:10,788 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:01:10,788 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:01:10,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:01:11,558 WARN ]: Spent 403.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2018-06-22 15:01:11,735 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 15:01:11,886 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2018-06-22 15:01:12,018 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2018-06-22 15:01:12,141 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 28 [2018-06-22 15:01:12,703 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:01:12,703 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:01:12,703 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:01:12,710 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:01:12,804 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:01:12,805 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:01:12,820 INFO ]: Computing forward predicates... [2018-06-22 15:01:16,636 WARN ]: Spent 3.57 s on a formula simplification. DAG size of input: 405 DAG size of output: 78 [2018-06-22 15:01:17,587 WARN ]: Spent 826.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2018-06-22 15:01:18,032 WARN ]: Spent 351.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2018-06-22 15:01:18,415 WARN ]: Spent 304.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-22 15:01:18,625 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2018-06-22 15:01:23,538 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:01:23,557 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:01:23,557 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2018-06-22 15:01:23,557 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:01:23,558 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:01:23,558 INFO ]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:01:23,558 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 33 states. Received shutdown request... [2018-06-22 15:01:24,483 WARN ]: Removed 13 from assertion stack [2018-06-22 15:01:24,483 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 15:01:24,484 WARN ]: Verification canceled [2018-06-22 15:01:24,487 WARN ]: Timeout [2018-06-22 15:01:24,487 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:01:24 BoogieIcfgContainer [2018-06-22 15:01:24,487 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:01:24,488 INFO ]: Toolchain (without parser) took 62044.56 ms. Allocated memory was 306.7 MB in the beginning and 945.8 MB in the end (delta: 639.1 MB). Free memory was 258.1 MB in the beginning and 769.3 MB in the end (delta: -511.2 MB). Peak memory consumption was 747.2 MB. Max. memory is 3.6 GB. [2018-06-22 15:01:24,488 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:01:24,488 INFO ]: ChcToBoogie took 62.89 ms. Allocated memory is still 306.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:01:24,489 INFO ]: Boogie Preprocessor took 58.25 ms. Allocated memory is still 306.7 MB. Free memory was 256.1 MB in the beginning and 254.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:01:24,489 INFO ]: RCFGBuilder took 187.13 ms. Allocated memory is still 306.7 MB. Free memory was 254.1 MB in the beginning and 244.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:01:24,490 INFO ]: TraceAbstraction took 61727.41 ms. Allocated memory was 306.7 MB in the beginning and 945.8 MB in the end (delta: 639.1 MB). Free memory was 244.1 MB in the beginning and 769.3 MB in the end (delta: -525.1 MB). Peak memory consumption was 733.2 MB. Max. memory is 3.6 GB. [2018-06-22 15:01:24,493 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 62.89 ms. Allocated memory is still 306.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 58.25 ms. Allocated memory is still 306.7 MB. Free memory was 256.1 MB in the beginning and 254.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 187.13 ms. Allocated memory is still 306.7 MB. Free memory was 254.1 MB in the beginning and 244.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61727.41 ms. Allocated memory was 306.7 MB in the beginning and 945.8 MB in the end (delta: 639.1 MB). Free memory was 244.1 MB in the beginning and 769.3 MB in the end (delta: -525.1 MB). Peak memory consumption was 733.2 MB. 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 constructing difference of abstraction (29states) and interpolant automaton (currently 3 states, 33 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 228. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.6s OverallTime, 10 OverallIterations, 10 TraceHistogramMax, 22.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 124 SDtfs, 388 SDslu, 746 SDs, 0 SdLazy, 650 SolverSat, 483 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 429 GetRequests, 205 SyntacticMatches, 9 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 44.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=9, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 37.9s InterpolantComputationTime, 531 NumberOfCodeBlocks, 531 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 512 ConstructedInterpolants, 0 QuantifiedInterpolants, 1031648672 SizeOfPredicates, 689 NumberOfNonLiveVariables, 2538 ConjunctsInSsa, 482 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 330/1230 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/dillig33.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-01-24-502.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig33.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-01-24-502.csv Completed graceful shutdown