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/cav12/kundu-bug-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:04:53,184 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:04:53,186 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:04:53,202 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:04:53,203 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:04:53,204 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:04:53,205 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:04:53,206 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:04:53,208 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:04:53,209 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:04:53,210 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:04:53,210 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:04:53,211 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:04:53,212 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:04:53,213 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:04:53,213 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:04:53,216 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:04:53,218 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:04:53,220 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:04:53,221 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:04:53,222 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:04:53,224 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:04:53,225 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:04:53,225 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:04:53,226 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:04:53,227 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:04:53,227 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:04:53,228 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:04:53,229 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:04:53,229 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:04:53,230 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:04:53,231 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:04:53,231 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:04:53,232 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:04:53,233 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:04:53,233 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 14:04:53,246 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:04:53,246 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:04:53,247 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:04:53,247 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:04:53,248 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:04:53,248 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:04:53,249 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:04:53,249 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:04:53,249 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:04:53,249 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:04:53,250 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:04:53,250 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:04:53,250 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:04:53,251 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:04:53,256 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:04:53,256 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:04:53,256 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:04:53,257 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:04:53,257 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:04:53,258 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:04:53,258 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:04:53,293 INFO ]: Repository-Root is: /tmp [2018-06-22 14:04:53,308 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:04:53,314 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:04:53,315 INFO ]: Initializing SmtParser... [2018-06-22 14:04:53,315 INFO ]: SmtParser initialized [2018-06-22 14:04:53,316 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 [2018-06-22 14:04:53,318 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 14:04:53,408 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 unknown [2018-06-22 14:04:53,991 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/kundu-bug-1.smt2 [2018-06-22 14:04:53,996 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:04:54,010 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:04:54,011 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:04:54,011 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:04:54,011 INFO ]: ChcToBoogie initialized [2018-06-22 14:04:54,022 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:04:53" (1/1) ... [2018-06-22 14:04:54,098 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54 Unit [2018-06-22 14:04:54,099 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:04:54,100 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:04:54,100 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:04:54,100 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:04:54,145 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,145 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,172 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,172 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,193 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,195 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,199 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (1/1) ... [2018-06-22 14:04:54,204 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:04:54,205 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:04:54,205 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:04:54,205 INFO ]: RCFGBuilder initialized [2018-06-22 14:04:54,206 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (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 14:04:54,218 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:04:54,218 INFO ]: Found specification of procedure False [2018-06-22 14:04:54,218 INFO ]: Found implementation of procedure False [2018-06-22 14:04:54,218 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:04:54,218 INFO ]: Found specification of procedure state [2018-06-22 14:04:54,218 INFO ]: Found implementation of procedure state [2018-06-22 14:04:54,218 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:04:54,218 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:04:54,218 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 14:04:54,626 INFO ]: Using library mode [2018-06-22 14:04:54,627 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:04:54 BoogieIcfgContainer [2018-06-22 14:04:54,627 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:04:54,629 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:04:54,629 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:04:54,633 INFO ]: TraceAbstraction initialized [2018-06-22 14:04:54,633 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:04:53" (1/3) ... [2018-06-22 14:04:54,634 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172240ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:04:54, skipping insertion in model container [2018-06-22 14:04:54,634 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:04:54" (2/3) ... [2018-06-22 14:04:54,635 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172240ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:04:54, skipping insertion in model container [2018-06-22 14:04:54,635 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:04:54" (3/3) ... [2018-06-22 14:04:54,637 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:04:54,646 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:04:54,656 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:04:54,704 INFO ]: Using default assertion order modulation [2018-06-22 14:04:54,704 INFO ]: Interprodecural is true [2018-06-22 14:04:54,704 INFO ]: Hoare is false [2018-06-22 14:04:54,704 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:04:54,704 INFO ]: Backedges is TWOTRACK [2018-06-22 14:04:54,704 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:04:54,705 INFO ]: Difference is false [2018-06-22 14:04:54,705 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:04:54,705 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:04:54,721 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:04:54,731 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:04:54,731 INFO ]: Found error trace [2018-06-22 14:04:54,732 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:04:54,732 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:04:54,738 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:04:54,740 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:04:54,740 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:04:54,782 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:54,782 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:04:54,782 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:54,817 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:54,963 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:04:54,966 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:04:54,966 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:04:54,968 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:04:54,982 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:04:54,983 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:04:54,989 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:04:55,150 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:04:55,151 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:04:55,152 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:04:55,153 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:04:55,153 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:04:55,166 INFO ]: With dead ends: 13 [2018-06-22 14:04:55,166 INFO ]: Without dead ends: 13 [2018-06-22 14:04:55,168 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 14:04:55,187 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:04:55,208 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:04:55,209 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:04:55,209 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:04:55,210 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:04:55,210 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:04:55,210 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:04:55,210 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:04:55,211 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:04:55,212 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:04:55,212 INFO ]: Found error trace [2018-06-22 14:04:55,212 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:04:55,212 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:04:55,212 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:04:55,212 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:04:55,212 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:04:55,213 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:55,213 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:04:55,213 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:55,350 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:55,643 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:04:55,643 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:04:55,643 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 14:04:55,649 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:04:55,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:55,753 INFO ]: Computing forward predicates... [2018-06-22 14:04:57,083 WARN ]: Spent 800.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2018-06-22 14:04:57,323 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:04:57,348 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:04:57,348 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:04:57,349 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:04:57,349 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:04:57,349 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:04:57,350 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:04:57,718 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:04:57,718 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:04:57,721 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:04:57,721 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:04:57,721 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:04:57,722 INFO ]: With dead ends: 15 [2018-06-22 14:04:57,722 INFO ]: Without dead ends: 15 [2018-06-22 14:04:57,723 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-06-22 14:04:57,723 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:04:57,725 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:04:57,726 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:04:57,726 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:04:57,726 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:04:57,726 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:04:57,726 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:04:57,726 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:04:57,726 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:04:57,727 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:04:57,727 INFO ]: Found error trace [2018-06-22 14:04:57,727 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:04:57,727 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:04:57,727 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:04:57,727 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:04:57,727 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:04:57,728 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:57,728 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:04:57,728 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:04:57,809 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:58,086 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:04:58,086 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:04:58,086 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 14:04:58,097 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:04:58,193 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:04:58,193 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:04:58,202 INFO ]: Computing forward predicates... [2018-06-22 14:04:58,538 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2018-06-22 14:04:59,276 WARN ]: Spent 644.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2018-06-22 14:04:59,530 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:04:59,564 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:04:59,564 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:04:59,564 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:04:59,564 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:04:59,565 INFO ]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:04:59,565 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:05:00,316 WARN ]: Spent 686.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2018-06-22 14:05:00,504 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2018-06-22 14:05:00,865 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2018-06-22 14:05:00,899 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:05:00,899 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:05:00,900 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:05:00,900 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:05:00,901 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:05:00,901 INFO ]: With dead ends: 17 [2018-06-22 14:05:00,901 INFO ]: Without dead ends: 17 [2018-06-22 14:05:00,902 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:05:00,902 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:05:00,905 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:05:00,905 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:05:00,905 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:05:00,905 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:05:00,906 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:05:00,906 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:05:00,906 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:05:00,906 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:05:00,906 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:05:00,906 INFO ]: Found error trace [2018-06-22 14:05:00,906 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:05:00,907 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:05:00,907 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:05:00,907 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:05:00,907 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:05:00,907 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:00,907 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:05:00,907 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:00,984 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:01,298 WARN ]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:05:01,493 WARN ]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:05:01,765 WARN ]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:05:02,148 WARN ]: Spent 286.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:05:02,441 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:05:02,441 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:05:02,441 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 14:05:02,453 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:05:02,564 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:05:02,565 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:02,575 INFO ]: Computing forward predicates... [2018-06-22 14:05:03,274 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 14:05:04,058 WARN ]: Spent 685.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 14:05:04,162 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:05:04,182 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:05:04,182 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:05:04,183 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:05:04,183 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:05:04,183 INFO ]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:05:04,183 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:05:05,089 WARN ]: Spent 864.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2018-06-22 14:05:05,352 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 24 [2018-06-22 14:05:05,744 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2018-06-22 14:05:05,777 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:05:05,778 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:05:05,778 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:05:05,778 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:05:05,778 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:05:05,779 INFO ]: With dead ends: 19 [2018-06-22 14:05:05,779 INFO ]: Without dead ends: 19 [2018-06-22 14:05:05,779 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:05:05,779 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:05:05,782 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:05:05,783 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:05:05,784 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:05:05,784 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:05:05,784 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:05:05,784 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:05:05,784 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:05:05,784 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:05:05,784 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:05:05,785 INFO ]: Found error trace [2018-06-22 14:05:05,785 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:05:05,785 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:05:05,785 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:05:05,785 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:05:05,785 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:05:05,785 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:05,785 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:05:05,785 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:05,896 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:06,392 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:05:06,392 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:05:06,392 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 14:05:06,399 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:05:06,534 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:05:06,534 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:06,547 INFO ]: Computing forward predicates... [2018-06-22 14:05:07,093 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 14:05:08,324 WARN ]: Spent 714.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-22 14:05:08,883 WARN ]: Spent 281.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2018-06-22 14:05:09,545 WARN ]: Spent 610.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 14:05:09,721 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:05:09,753 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:05:09,753 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 14:05:09,753 INFO ]: Interpolant automaton has 21 states [2018-06-22 14:05:09,753 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 14:05:09,753 INFO ]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:05:09,754 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 14:05:10,699 WARN ]: Spent 874.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 57 [2018-06-22 14:05:11,071 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2018-06-22 14:05:11,399 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 41 [2018-06-22 14:05:11,994 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2018-06-22 14:05:12,038 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:05:12,038 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:05:12,039 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:05:12,039 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 14:05:12,039 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:05:12,039 INFO ]: With dead ends: 21 [2018-06-22 14:05:12,039 INFO ]: Without dead ends: 21 [2018-06-22 14:05:12,040 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2018-06-22 14:05:12,040 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:05:12,043 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:05:12,043 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:05:12,043 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:05:12,043 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:05:12,044 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:05:12,044 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:05:12,044 INFO ]: Interpolant automaton has 21 states. [2018-06-22 14:05:12,044 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:05:12,044 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:05:12,044 INFO ]: Found error trace [2018-06-22 14:05:12,045 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:05:12,045 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:05:12,045 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:05:12,045 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:05:12,045 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:05:12,045 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:12,045 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:05:12,045 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:12,179 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:12,533 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:05:12,891 WARN ]: Spent 312.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-06-22 14:05:13,353 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:05:13,353 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:05:13,353 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 14:05:13,361 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:05:13,573 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:05:13,573 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:13,591 INFO ]: Computing forward predicates... [2018-06-22 14:05:13,890 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 14:05:15,017 WARN ]: Spent 986.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 67 [2018-06-22 14:05:18,182 WARN ]: Spent 1.69 s on a formula simplification. DAG size of input: 97 DAG size of output: 85 [2018-06-22 14:05:20,649 WARN ]: Spent 1.10 s on a formula simplification. DAG size of input: 103 DAG size of output: 89 [2018-06-22 14:05:22,322 WARN ]: Spent 1.19 s on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2018-06-22 14:05:22,972 INFO ]: Checked inductivity of 55 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:05:22,993 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:05:22,993 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 14:05:22,993 INFO ]: Interpolant automaton has 25 states [2018-06-22 14:05:22,993 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 14:05:22,993 INFO ]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:05:22,993 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 14:05:25,183 WARN ]: Spent 2.07 s on a formula simplification. DAG size of input: 193 DAG size of output: 125 [2018-06-22 14:05:25,477 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 41 [2018-06-22 14:05:25,779 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 43 [2018-06-22 14:05:26,384 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 42 [2018-06-22 14:05:26,993 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 62 [2018-06-22 14:05:28,638 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 198 DAG size of output: 116 [2018-06-22 14:05:30,677 WARN ]: Spent 1.92 s on a formula simplification. DAG size of input: 193 DAG size of output: 120 [2018-06-22 14:05:30,748 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:05:30,748 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 14:05:30,748 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:05:30,749 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 14:05:30,749 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:05:30,749 INFO ]: With dead ends: 25 [2018-06-22 14:05:30,749 INFO ]: Without dead ends: 25 [2018-06-22 14:05:30,750 INFO ]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=219, Invalid=837, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:05:30,750 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 14:05:30,754 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 14:05:30,754 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 14:05:30,755 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 14:05:30,755 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 29 [2018-06-22 14:05:30,755 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:05:30,755 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 14:05:30,755 INFO ]: Interpolant automaton has 25 states. [2018-06-22 14:05:30,755 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 14:05:30,756 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 14:05:30,756 INFO ]: Found error trace [2018-06-22 14:05:30,756 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:05:30,756 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:05:30,756 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 6 times [2018-06-22 14:05:30,756 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:05:30,756 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:05:30,756 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:30,757 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:05:30,757 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:05:30,997 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:31,884 WARN ]: Spent 314.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 14 [2018-06-22 14:05:32,127 WARN ]: Spent 232.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2018-06-22 14:05:32,491 WARN ]: Spent 352.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 80 [2018-06-22 14:05:32,801 WARN ]: Spent 293.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2018-06-22 14:05:33,001 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2018-06-22 14:05:33,550 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2018-06-22 14:05:33,723 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2018-06-22 14:05:33,921 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:05:33,921 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:05:33,921 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) [2018-06-22 14:05:33,937 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:05:34,184 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 14:05:34,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:05:34,202 INFO ]: Computing forward predicates... [2018-06-22 14:05:34,818 WARN ]: Spent 532.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2018-06-22 14:05:35,953 WARN ]: Spent 1.05 s on a formula simplification. DAG size of input: 78 DAG size of output: 73 [2018-06-22 14:05:37,178 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2018-06-22 14:05:38,508 WARN ]: Spent 1.22 s on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2018-06-22 14:05:40,968 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2018-06-22 14:05:43,005 WARN ]: Spent 1.43 s on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2018-06-22 14:05:44,536 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2018-06-22 14:05:46,073 INFO ]: Checked inductivity of 105 backedges. 4 proven. 73 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 14:05:46,095 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:05:46,096 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 14:05:46,096 INFO ]: Interpolant automaton has 33 states [2018-06-22 14:05:46,096 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 14:05:46,097 INFO ]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 14:05:46,097 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 14:05:48,533 WARN ]: Spent 2.29 s on a formula simplification. DAG size of input: 298 DAG size of output: 142 [2018-06-22 14:05:48,965 WARN ]: Spent 316.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 44 [2018-06-22 14:05:49,357 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 48 [2018-06-22 14:05:49,992 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 330 DAG size of output: 65 [2018-06-22 14:05:51,071 WARN ]: Spent 968.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 82 [2018-06-22 14:05:51,935 WARN ]: Spent 711.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 66 [2018-06-22 14:05:52,954 WARN ]: Spent 897.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 85 Received shutdown request... [2018-06-22 14:05:54,661 WARN ]: Removed 10 from assertion stack [2018-06-22 14:05:54,661 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 14:05:54,661 WARN ]: Verification canceled [2018-06-22 14:05:54,665 WARN ]: Timeout [2018-06-22 14:05:54,665 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:05:54 BoogieIcfgContainer [2018-06-22 14:05:54,665 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:05:54,666 INFO ]: Toolchain (without parser) took 60669.83 ms. Allocated memory was 303.0 MB in the beginning and 1.2 GB in the end (delta: 894.4 MB). Free memory was 233.7 MB in the beginning and 1.1 GB in the end (delta: -893.3 MB). Peak memory consumption was 954.2 MB. Max. memory is 3.6 GB. [2018-06-22 14:05:54,667 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 303.0 MB. Free memory is still 267.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:05:54,667 INFO ]: ChcToBoogie took 87.96 ms. Allocated memory is still 303.0 MB. Free memory was 233.7 MB in the beginning and 229.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:05:54,667 INFO ]: Boogie Preprocessor took 104.84 ms. Allocated memory is still 303.0 MB. Free memory was 229.7 MB in the beginning and 227.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:05:54,668 INFO ]: RCFGBuilder took 421.94 ms. Allocated memory is still 303.0 MB. Free memory was 227.7 MB in the beginning and 199.8 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:05:54,668 INFO ]: TraceAbstraction took 60036.70 ms. Allocated memory was 303.0 MB in the beginning and 1.2 GB in the end (delta: 894.4 MB). Free memory was 199.8 MB in the beginning and 1.1 GB in the end (delta: -927.2 MB). Peak memory consumption was 920.3 MB. Max. memory is 3.6 GB. [2018-06-22 14:05:54,670 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 303.0 MB. Free memory is still 267.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 87.96 ms. Allocated memory is still 303.0 MB. Free memory was 233.7 MB in the beginning and 229.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 104.84 ms. Allocated memory is still 303.0 MB. Free memory was 229.7 MB in the beginning and 227.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 421.94 ms. Allocated memory is still 303.0 MB. Free memory was 227.7 MB in the beginning and 199.8 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60036.70 ms. Allocated memory was 303.0 MB in the beginning and 1.2 GB in the end (delta: 894.4 MB). Free memory was 199.8 MB in the beginning and 1.1 GB in the end (delta: -927.2 MB). Peak memory consumption was 920.3 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 (25states) and interpolant automaton (currently 11 states, 33 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 304. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.9s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 22.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 83 SDtfs, 212 SDslu, 503 SDs, 0 SdLazy, 449 SolverSat, 278 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 243 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 45.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 35.7s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 280 ConstructedInterpolants, 0 QuantifiedInterpolants, 355344 SizeOfPredicates, 2216 NumberOfNonLiveVariables, 2790 ConjunctsInSsa, 219 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 131/460 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/kundu-bug-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-05-54-679.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/kundu-bug-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-05-54-679.csv Completed graceful shutdown