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/seq4.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:32:04,792 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:32:04,795 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:32:04,810 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:32:04,811 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:32:04,812 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:32:04,813 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:32:04,815 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:32:04,817 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:32:04,818 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:32:04,820 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:32:04,820 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:32:04,821 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:32:04,821 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:32:04,822 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:32:04,825 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:32:04,827 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:32:04,840 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:32:04,841 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:32:04,842 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:32:04,843 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:32:04,849 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:32:04,849 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:32:04,849 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:32:04,850 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:32:04,851 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:32:04,851 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:32:04,852 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:32:04,853 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:32:04,853 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:32:04,854 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:32:04,854 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:32:04,854 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:32:04,859 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:32:04,860 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:32:04,860 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 15:32:04,879 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:32:04,880 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:32:04,880 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:32:04,880 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:32:04,881 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:32:04,881 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:32:04,882 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:32:04,882 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:32:04,882 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:32:04,882 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:32:04,882 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:32:04,883 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:32:04,885 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:32:04,885 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:32:04,886 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:32:04,886 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:32:04,886 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:32:04,886 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:32:04,886 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:32:04,888 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:32:04,888 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:32:04,937 INFO ]: Repository-Root is: /tmp [2018-06-22 15:32:04,951 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:32:04,957 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:32:04,958 INFO ]: Initializing SmtParser... [2018-06-22 15:32:04,958 INFO ]: SmtParser initialized [2018-06-22 15:32:04,959 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 [2018-06-22 15:32:04,960 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 15:32:05,052 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 unknown [2018-06-22 15:32:05,368 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 [2018-06-22 15:32:05,372 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:32:05,378 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:32:05,379 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:32:05,379 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:32:05,379 INFO ]: ChcToBoogie initialized [2018-06-22 15:32:05,382 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,427 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05 Unit [2018-06-22 15:32:05,427 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:32:05,428 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:32:05,428 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:32:05,428 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:32:05,447 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,447 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,465 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,466 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,470 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,471 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,473 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... [2018-06-22 15:32:05,484 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:32:05,484 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:32:05,484 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:32:05,484 INFO ]: RCFGBuilder initialized [2018-06-22 15:32:05,485 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:32:05,502 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:32:05,502 INFO ]: Found specification of procedure False [2018-06-22 15:32:05,502 INFO ]: Found implementation of procedure False [2018-06-22 15:32:05,502 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:32:05,502 INFO ]: Found specification of procedure state [2018-06-22 15:32:05,502 INFO ]: Found implementation of procedure state [2018-06-22 15:32:05,502 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:32:05,502 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:32:05,502 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:32:05,758 INFO ]: Using library mode [2018-06-22 15:32:05,759 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:32:05 BoogieIcfgContainer [2018-06-22 15:32:05,759 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:32:05,761 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:32:05,761 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:32:05,773 INFO ]: TraceAbstraction initialized [2018-06-22 15:32:05,773 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:32:05" (1/3) ... [2018-06-22 15:32:05,774 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4108f04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:32:05, skipping insertion in model container [2018-06-22 15:32:05,774 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:32:05" (2/3) ... [2018-06-22 15:32:05,774 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4108f04f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:32:05, skipping insertion in model container [2018-06-22 15:32:05,774 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:32:05" (3/3) ... [2018-06-22 15:32:05,778 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:32:05,788 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:32:05,799 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:32:05,847 INFO ]: Using default assertion order modulation [2018-06-22 15:32:05,848 INFO ]: Interprodecural is true [2018-06-22 15:32:05,848 INFO ]: Hoare is false [2018-06-22 15:32:05,848 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:32:05,848 INFO ]: Backedges is TWOTRACK [2018-06-22 15:32:05,848 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:32:05,848 INFO ]: Difference is false [2018-06-22 15:32:05,848 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:32:05,848 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:32:05,862 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:32:05,877 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:32:05,877 INFO ]: Found error trace [2018-06-22 15:32:05,878 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:05,878 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:05,885 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:32:05,887 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:05,887 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:05,918 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:05,918 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:05,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:05,948 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:06,099 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:32:06,102 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:32:06,103 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:32:06,104 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:32:06,116 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:32:06,116 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:32:06,118 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:32:06,198 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:06,198 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:32:06,199 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:32:06,200 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:32:06,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:06,209 INFO ]: With dead ends: 13 [2018-06-22 15:32:06,209 INFO ]: Without dead ends: 13 [2018-06-22 15:32:06,210 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:32:06,224 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:32:06,243 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:32:06,244 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:32:06,245 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:32:06,246 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:32:06,246 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:06,246 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:32:06,246 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:32:06,246 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:32:06,247 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:32:06,247 INFO ]: Found error trace [2018-06-22 15:32:06,247 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:06,247 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:06,247 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:32:06,248 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:06,248 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:06,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:06,248 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:06,248 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:06,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:06,555 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:32:06,556 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:06,556 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 15:32:06,563 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:06,601 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:06,608 INFO ]: Computing forward predicates... [2018-06-22 15:32:06,940 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:32:06,961 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:06,961 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:32:06,962 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:32:06,962 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:32:06,962 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:32:06,962 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:32:07,155 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:07,155 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:32:07,156 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:32:07,156 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:32:07,156 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:07,156 INFO ]: With dead ends: 15 [2018-06-22 15:32:07,157 INFO ]: Without dead ends: 15 [2018-06-22 15:32:07,157 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 15:32:07,157 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:32:07,160 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:32:07,160 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:32:07,161 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:32:07,161 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:32:07,161 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:07,161 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:32:07,161 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:32:07,161 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:32:07,162 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:32:07,162 INFO ]: Found error trace [2018-06-22 15:32:07,162 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:07,162 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:07,162 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:32:07,162 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:07,162 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:07,163 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:07,163 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:07,163 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:07,218 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:07,667 WARN ]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:32:07,713 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:32:07,713 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:07,713 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 15:32:07,720 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:32:07,777 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:32:07,777 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:07,781 INFO ]: Computing forward predicates... [2018-06-22 15:32:08,241 WARN ]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 15:32:08,543 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:32:08,562 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:08,562 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:32:08,562 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:32:08,562 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:32:08,562 INFO ]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:32:08,563 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:32:09,174 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 18 [2018-06-22 15:32:09,193 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:09,193 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:32:09,194 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:32:09,194 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:32:09,194 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:09,195 INFO ]: With dead ends: 17 [2018-06-22 15:32:09,195 INFO ]: Without dead ends: 17 [2018-06-22 15:32:09,195 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:32:09,195 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:32:09,198 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:32:09,198 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:32:09,199 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:32:09,199 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:32:09,199 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:09,199 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:32:09,199 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:32:09,199 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:32:09,200 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:32:09,200 INFO ]: Found error trace [2018-06-22 15:32:09,200 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:09,200 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:09,200 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:32:09,200 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:09,200 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:09,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:09,201 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:32:09,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:09,242 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:09,546 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:32:09,546 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:09,546 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 15:32:09,558 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:32:09,625 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:32:09,625 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:09,630 INFO ]: Computing forward predicates... [2018-06-22 15:32:09,939 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:32:09,970 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:09,970 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:32:09,970 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:32:09,970 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:32:09,971 INFO ]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:32:09,971 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:32:10,202 WARN ]: Spent 209.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2018-06-22 15:32:10,417 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:10,417 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:32:10,418 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:32:10,418 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:32:10,418 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:10,419 INFO ]: With dead ends: 19 [2018-06-22 15:32:10,419 INFO ]: Without dead ends: 19 [2018-06-22 15:32:10,419 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:32:10,419 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:32:10,422 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:32:10,422 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:32:10,423 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:32:10,423 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:32:10,423 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:10,423 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:32:10,423 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:32:10,423 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:32:10,424 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:32:10,424 INFO ]: Found error trace [2018-06-22 15:32:10,424 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:10,424 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:10,424 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:32:10,424 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:10,424 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:10,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:10,425 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:32:10,425 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:10,470 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:11,179 WARN ]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 15:32:11,365 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:32:11,365 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:11,365 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 15:32:11,372 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:32:11,414 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:32:11,414 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:11,418 INFO ]: Computing forward predicates... [2018-06-22 15:32:11,937 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:32:11,956 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:11,956 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 15:32:11,956 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:32:11,957 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:32:11,957 INFO ]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:32:11,957 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-22 15:32:12,254 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2018-06-22 15:32:12,530 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2018-06-22 15:32:12,685 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 28 [2018-06-22 15:32:12,823 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-06-22 15:32:12,846 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:12,846 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:32:12,850 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:32:12,850 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-22 15:32:12,850 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:12,851 INFO ]: With dead ends: 21 [2018-06-22 15:32:12,851 INFO ]: Without dead ends: 21 [2018-06-22 15:32:12,851 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2018-06-22 15:32:12,851 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:32:12,854 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:32:12,854 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:32:12,857 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:32:12,857 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:32:12,857 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:12,857 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:32:12,857 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:32:12,857 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:32:12,858 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:32:12,858 INFO ]: Found error trace [2018-06-22 15:32:12,858 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:12,858 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:12,858 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:32:12,858 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:12,858 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:12,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:12,859 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:32:12,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:12,945 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:13,328 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2018-06-22 15:32:13,544 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:32:13,544 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:13,544 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 15:32:13,550 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:32:13,616 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:32:13,616 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:13,621 INFO ]: Computing forward predicates... [2018-06-22 15:32:15,803 WARN ]: Spent 1.68 s on a formula simplification. DAG size of input: 256 DAG size of output: 45 [2018-06-22 15:32:18,591 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 2 [2018-06-22 15:32:18,623 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:32:18,654 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:18,655 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2018-06-22 15:32:18,655 INFO ]: Interpolant automaton has 18 states [2018-06-22 15:32:18,655 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 15:32:18,655 INFO ]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:32:18,655 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2018-06-22 15:32:18,908 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 15:32:19,927 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2018-06-22 15:32:20,147 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 23 [2018-06-22 15:32:20,777 WARN ]: Spent 606.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2018-06-22 15:32:21,141 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2018-06-22 15:32:21,507 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2018-06-22 15:32:21,837 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2018-06-22 15:32:21,864 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:21,864 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:32:21,864 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:32:21,864 INFO ]: Start accepts. Automaton has 18 states. Word has length 29 [2018-06-22 15:32:21,865 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:21,865 INFO ]: With dead ends: 23 [2018-06-22 15:32:21,865 INFO ]: Without dead ends: 23 [2018-06-22 15:32:21,866 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:32:21,866 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:32:21,869 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:32:21,869 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:32:21,870 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:32:21,870 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:32:21,870 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:21,870 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:32:21,870 INFO ]: Interpolant automaton has 18 states. [2018-06-22 15:32:21,870 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:32:21,871 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:32:21,871 INFO ]: Found error trace [2018-06-22 15:32:21,871 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:21,871 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:21,871 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:32:21,871 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:21,871 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:21,872 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:21,872 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:32:21,872 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:21,958 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:22,182 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 15:32:22,884 WARN ]: Spent 657.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 19 [2018-06-22 15:32:23,630 WARN ]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:32:23,727 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:32:23,727 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:23,727 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 15:32:23,735 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:32:23,814 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:32:23,814 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:23,822 INFO ]: Computing forward predicates... [2018-06-22 15:32:24,276 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 27 [2018-06-22 15:32:26,501 WARN ]: Spent 1.85 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2018-06-22 15:32:27,613 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:32:27,642 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:27,642 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2018-06-22 15:32:27,642 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:32:27,642 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:32:27,643 INFO ]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:32:27,643 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 21 states. [2018-06-22 15:32:28,503 WARN ]: Spent 827.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2018-06-22 15:32:28,996 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 45 [2018-06-22 15:32:29,501 WARN ]: Spent 477.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2018-06-22 15:32:30,072 WARN ]: Spent 547.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 52 [2018-06-22 15:32:30,515 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2018-06-22 15:32:31,012 WARN ]: Spent 464.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 54 [2018-06-22 15:32:31,883 WARN ]: Spent 840.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 76 [2018-06-22 15:32:32,002 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:32,002 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:32:32,002 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:32:32,002 INFO ]: Start accepts. Automaton has 21 states. Word has length 33 [2018-06-22 15:32:32,002 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:32,003 INFO ]: With dead ends: 25 [2018-06-22 15:32:32,003 INFO ]: Without dead ends: 25 [2018-06-22 15:32:32,004 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:32:32,004 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:32:32,006 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:32:32,006 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:32:32,007 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:32:32,007 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:32:32,007 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:32,007 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:32:32,007 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:32:32,007 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:32:32,008 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:32:32,008 INFO ]: Found error trace [2018-06-22 15:32:32,008 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:32,008 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:32,008 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:32:32,008 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:32,008 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:32,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:32,009 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:32:32,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:32,104 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:32,605 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2018-06-22 15:32:32,764 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2018-06-22 15:32:33,251 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:32:33,251 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:33,251 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 15:32:33,258 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:33,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:33,331 INFO ]: Computing forward predicates... [2018-06-22 15:32:37,872 WARN ]: Spent 3.97 s on a formula simplification. DAG size of input: 666 DAG size of output: 43 [2018-06-22 15:32:39,283 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 121 DAG size of output: 59 [2018-06-22 15:32:40,963 WARN ]: Spent 1.49 s on a formula simplification. DAG size of input: 182 DAG size of output: 96 [2018-06-22 15:32:41,192 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2018-06-22 15:32:46,931 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:32:46,950 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:32:46,950 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2018-06-22 15:32:46,951 INFO ]: Interpolant automaton has 31 states [2018-06-22 15:32:46,951 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 15:32:46,951 INFO ]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:32:46,951 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 31 states. [2018-06-22 15:32:49,620 WARN ]: Spent 2.59 s on a formula simplification. DAG size of input: 206 DAG size of output: 156 [2018-06-22 15:32:50,481 WARN ]: Spent 709.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 41 [2018-06-22 15:32:51,268 WARN ]: Spent 717.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 33 [2018-06-22 15:32:52,488 WARN ]: Spent 1.17 s on a formula simplification. DAG size of input: 204 DAG size of output: 45 [2018-06-22 15:32:53,244 WARN ]: Spent 697.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 44 [2018-06-22 15:32:54,757 WARN ]: Spent 1.45 s on a formula simplification. DAG size of input: 212 DAG size of output: 113 [2018-06-22 15:32:55,561 WARN ]: Spent 739.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 67 [2018-06-22 15:32:56,858 WARN ]: Spent 1.25 s on a formula simplification. DAG size of input: 203 DAG size of output: 107 [2018-06-22 15:32:56,909 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:32:56,909 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:32:56,909 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:32:56,910 INFO ]: Start accepts. Automaton has 31 states. Word has length 37 [2018-06-22 15:32:56,910 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:32:56,910 INFO ]: With dead ends: 27 [2018-06-22 15:32:56,910 INFO ]: Without dead ends: 27 [2018-06-22 15:32:56,911 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=256, Invalid=1304, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 15:32:56,911 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:32:56,913 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:32:56,914 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:32:56,914 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:32:56,914 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:32:56,914 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:32:56,914 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:32:56,914 INFO ]: Interpolant automaton has 31 states. [2018-06-22 15:32:56,914 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:32:56,916 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:32:56,916 INFO ]: Found error trace [2018-06-22 15:32:56,916 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:32:56,916 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:32:56,916 INFO ]: Analyzing trace with hash -544278078, now seen corresponding path program 8 times [2018-06-22 15:32:56,916 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:32:56,916 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:32:56,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:56,917 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:32:56,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:32:57,092 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:57,356 WARN ]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 15:32:57,545 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 39 [2018-06-22 15:32:58,386 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:32:58,386 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:32:58,386 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 15:32:58,393 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:32:58,480 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:32:58,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:32:58,487 INFO ]: Computing forward predicates... [2018-06-22 15:32:58,843 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 24 [2018-06-22 15:32:59,078 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 36 [2018-06-22 15:32:59,386 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-06-22 15:32:59,564 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2018-06-22 15:32:59,746 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2018-06-22 15:33:01,641 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:33:01,660 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:33:01,660 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2018-06-22 15:33:01,660 INFO ]: Interpolant automaton has 37 states [2018-06-22 15:33:01,661 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 15:33:01,661 INFO ]: CoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 15:33:01,661 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 37 states. [2018-06-22 15:33:03,181 WARN ]: Spent 1.42 s on a formula simplification. DAG size of input: 177 DAG size of output: 126 [2018-06-22 15:33:03,633 WARN ]: Spent 343.00 ms on a formula simplification. DAG size of input: 175 DAG size of output: 43 [2018-06-22 15:33:04,043 WARN ]: Spent 356.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 41 Received shutdown request... [2018-06-22 15:33:04,202 WARN ]: Removed 8 from assertion stack [2018-06-22 15:33:04,202 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:33:04,202 WARN ]: Verification canceled [2018-06-22 15:33:04,205 WARN ]: Timeout [2018-06-22 15:33:04,205 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:33:04 BoogieIcfgContainer [2018-06-22 15:33:04,205 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:33:04,206 INFO ]: Toolchain (without parser) took 58833.19 ms. Allocated memory was 306.2 MB in the beginning and 885.0 MB in the end (delta: 578.8 MB). Free memory was 256.7 MB in the beginning and 387.3 MB in the end (delta: -130.6 MB). Peak memory consumption was 448.2 MB. Max. memory is 3.6 GB. [2018-06-22 15:33:04,206 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:33:04,206 INFO ]: ChcToBoogie took 48.32 ms. Allocated memory is still 306.2 MB. Free memory was 255.7 MB in the beginning and 254.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 15:33:04,207 INFO ]: Boogie Preprocessor took 56.03 ms. Allocated memory is still 306.2 MB. Free memory was 254.8 MB in the beginning and 252.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:33:04,207 INFO ]: RCFGBuilder took 274.84 ms. Allocated memory is still 306.2 MB. Free memory was 252.8 MB in the beginning and 241.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:33:04,207 INFO ]: TraceAbstraction took 58444.56 ms. Allocated memory was 306.2 MB in the beginning and 885.0 MB in the end (delta: 578.8 MB). Free memory was 241.8 MB in the beginning and 387.3 MB in the end (delta: -145.6 MB). Peak memory consumption was 433.3 MB. Max. memory is 3.6 GB. [2018-06-22 15:33:04,210 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 306.2 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 48.32 ms. Allocated memory is still 306.2 MB. Free memory was 255.7 MB in the beginning and 254.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * Boogie Preprocessor took 56.03 ms. Allocated memory is still 306.2 MB. Free memory was 254.8 MB in the beginning and 252.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 274.84 ms. Allocated memory is still 306.2 MB. Free memory was 252.8 MB in the beginning and 241.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58444.56 ms. Allocated memory was 306.2 MB in the beginning and 885.0 MB in the end (delta: 578.8 MB). Free memory was 241.8 MB in the beginning and 387.3 MB in the end (delta: -145.6 MB). Peak memory consumption was 433.3 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 (27states) and interpolant automaton (currently 7 states, 37 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 181. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 58.3s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 22.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 109 SDtfs, 277 SDslu, 660 SDs, 0 SdLazy, 578 SolverSat, 355 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 357 GetRequests, 169 SyntacticMatches, 8 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 42.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=8, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 34.3s InterpolantComputationTime, 441 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 2576948 SizeOfPredicates, 698 NumberOfNonLiveVariables, 2236 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 240/888 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/seq4.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-33-04-219.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq4.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-33-04-219.csv Completed graceful shutdown