java -Xss4m -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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:16:41,899 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:16:41,900 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:16:41,914 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:16:41,915 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:16:41,916 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:16:41,917 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:16:41,921 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:16:41,923 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:16:41,924 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:16:41,925 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:16:41,925 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:16:41,925 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:16:41,926 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:16:41,927 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:16:41,928 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:16:41,929 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:16:41,931 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:16:41,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:16:41,934 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:16:41,935 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:16:41,938 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:16:41,938 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:16:41,938 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:16:41,939 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:16:41,940 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:16:41,941 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:16:41,942 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:16:41,943 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:16:41,943 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:16:41,944 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:16:41,944 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:16:41,945 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:16:41,945 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:16:41,946 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:16:41,946 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:16:41,966 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:16:41,966 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:16:41,966 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:16:41,966 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:16:41,967 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:16:41,968 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:16:41,968 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:16:41,968 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:16:41,968 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:16:41,969 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:16:41,969 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:16:41,969 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:16:41,969 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:16:41,969 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:16:41,970 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:16:41,970 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:16:41,970 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:16:41,970 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:16:41,970 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:16:41,971 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:16:41,971 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:16:41,972 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:16:41,973 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:16:42,025 INFO ]: Repository-Root is: /tmp [2018-06-25 13:16:42,047 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:16:42,052 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:16:42,053 INFO ]: Initializing SmtParser... [2018-06-25 13:16:42,054 INFO ]: SmtParser initialized [2018-06-25 13:16:42,054 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 [2018-06-25 13:16:42,056 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 [2018-06-25 13:16:42,154 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 unknown [2018-06-25 13:16:42,448 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 [2018-06-25 13:16:42,453 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:16:42,465 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:16:42,466 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:16:42,466 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:16:42,466 INFO ]: ChcToBoogie initialized [2018-06-25 13:16:42,469 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,535 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42 Unit [2018-06-25 13:16:42,535 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:16:42,536 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:16:42,536 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:16:42,536 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:16:42,559 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,562 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,570 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,570 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,585 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,587 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,588 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (1/1) ... [2018-06-25 13:16:42,590 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:16:42,600 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:16:42,600 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:16:42,600 INFO ]: RCFGBuilder initialized [2018-06-25 13:16:42,601 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (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) [2018-06-25 13:16:42,629 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:16:42,629 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:16:42,629 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:16:42,629 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:16:42,629 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:16:42,629 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 [2018-06-25 13:16:42,903 INFO ]: Using library mode [2018-06-25 13:16:42,904 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:16:42 BoogieIcfgContainer [2018-06-25 13:16:42,904 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:16:42,906 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:16:42,906 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:16:42,909 INFO ]: TraceAbstraction initialized [2018-06-25 13:16:42,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:16:42" (1/3) ... [2018-06-25 13:16:42,910 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a150297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:16:42, skipping insertion in model container [2018-06-25 13:16:42,910 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:16:42" (2/3) ... [2018-06-25 13:16:42,910 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a150297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:16:42, skipping insertion in model container [2018-06-25 13:16:42,910 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:16:42" (3/3) ... [2018-06-25 13:16:42,915 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:16:42,924 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:16:42,931 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:16:42,981 INFO ]: Using default assertion order modulation [2018-06-25 13:16:42,981 INFO ]: Interprodecural is true [2018-06-25 13:16:42,981 INFO ]: Hoare is false [2018-06-25 13:16:42,981 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:16:42,981 INFO ]: Backedges is TWOTRACK [2018-06-25 13:16:42,981 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:16:42,981 INFO ]: Difference is false [2018-06-25 13:16:42,981 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:16:42,981 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:16:42,992 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:16:43,004 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:16:43,004 INFO ]: Found error trace [2018-06-25 13:16:43,005 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:16:43,005 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:16:43,011 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:16:43,013 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:16:43,014 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:16:43,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:43,057 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:16:43,057 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:43,103 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:43,200 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:43,204 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:16:43,204 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:16:43,206 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:16:43,225 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:16:43,225 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:16:43,228 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:16:43,310 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:16:43,310 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:16:43,311 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:16:43,312 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:16:43,312 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:16:43,321 INFO ]: With dead ends: 9 [2018-06-25 13:16:43,321 INFO ]: Without dead ends: 9 [2018-06-25 13:16:43,322 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:16:43,367 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:16:43,397 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:16:43,398 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:16:43,399 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:16:43,400 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:16:43,400 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:16:43,400 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:16:43,400 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:16:43,400 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:16:43,400 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:16:43,400 INFO ]: Found error trace [2018-06-25 13:16:43,400 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:16:43,401 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:16:43,401 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:16:43,401 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:16:43,401 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:16:43,402 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:43,402 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:16:43,402 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:43,451 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:43,615 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:43,615 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:16:43,615 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 [2018-06-25 13:16:43,624 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:16:43,687 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:43,698 INFO ]: Computing forward predicates... [2018-06-25 13:16:45,483 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:45,504 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:16:45,504 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:16:45,504 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:16:45,504 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:16:45,504 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:16:45,505 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:16:45,528 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:16:45,528 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:16:45,528 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:16:45,528 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:16:45,528 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:16:45,528 INFO ]: With dead ends: 10 [2018-06-25 13:16:45,528 INFO ]: Without dead ends: 10 [2018-06-25 13:16:45,529 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:16:45,529 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:16:45,530 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:16:45,530 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:16:45,531 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:16:45,531 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:16:45,531 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:16:45,531 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:16:45,531 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:16:45,531 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:16:45,531 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:16:45,531 INFO ]: Found error trace [2018-06-25 13:16:45,531 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:16:45,532 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:16:45,532 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 13:16:45,532 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:16:45,532 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:16:45,533 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:45,533 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:16:45,533 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:45,580 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:45,857 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:16:45,858 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:45,858 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:16:45,858 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) [2018-06-25 13:16:45,873 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:16:45,934 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:16:45,934 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:45,937 INFO ]: Computing forward predicates... [2018-06-25 13:16:47,045 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:47,065 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:16:47,065 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:16:47,065 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:16:47,065 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:16:47,065 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:16:47,065 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:16:47,191 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:16:47,192 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:16:47,192 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:16:47,192 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:16:47,192 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:16:47,192 INFO ]: With dead ends: 11 [2018-06-25 13:16:47,192 INFO ]: Without dead ends: 11 [2018-06-25 13:16:47,192 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:16:47,193 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:16:47,194 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:16:47,194 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:16:47,194 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:16:47,194 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:16:47,194 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:16:47,194 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:16:47,194 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:16:47,194 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:16:47,195 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:16:47,195 INFO ]: Found error trace [2018-06-25 13:16:47,195 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:16:47,195 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:16:47,195 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-25 13:16:47,195 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:16:47,195 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:16:47,196 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:47,196 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:16:47,196 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:47,235 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:47,375 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:47,375 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:16:47,375 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 [2018-06-25 13:16:47,381 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:16:47,450 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:16:47,451 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:47,454 INFO ]: Computing forward predicates... [2018-06-25 13:16:52,747 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:52,787 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:16:52,787 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-25 13:16:52,787 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:16:52,787 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:16:52,788 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:16:52,788 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-25 13:16:52,946 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:16:52,946 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:16:52,946 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:16:52,946 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-25 13:16:52,946 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:16:52,946 INFO ]: With dead ends: 12 [2018-06-25 13:16:52,946 INFO ]: Without dead ends: 12 [2018-06-25 13:16:52,947 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:16:52,947 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:16:52,947 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:16:52,947 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:16:52,948 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:16:52,948 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:16:52,948 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:16:52,948 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:16:52,948 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:16:52,948 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:16:52,948 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:16:52,948 INFO ]: Found error trace [2018-06-25 13:16:52,948 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:16:52,948 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:16:52,948 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-25 13:16:52,948 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:16:52,948 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:16:52,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:52,949 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:16:52,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:16:52,988 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:53,192 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:16:53,193 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:16:53,193 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 [2018-06-25 13:16:53,198 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:16:53,249 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:16:53,249 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:16:53,252 INFO ]: Computing forward predicates... [2018-06-25 13:17:01,226 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:17:01,246 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:17:01,246 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:17:01,247 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:17:01,247 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:17:01,247 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:17:01,247 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:17:01,391 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:17:01,391 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:17:01,391 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:17:01,391 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:17:01,392 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:17:01,392 INFO ]: With dead ends: 13 [2018-06-25 13:17:01,392 INFO ]: Without dead ends: 13 [2018-06-25 13:17:01,396 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:17:01,396 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:17:01,397 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:17:01,397 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:17:01,398 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:17:01,398 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:17:01,398 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:17:01,398 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:17:01,398 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:17:01,398 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:17:01,398 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:17:01,398 INFO ]: Found error trace [2018-06-25 13:17:01,398 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:17:01,398 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:17:01,398 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-25 13:17:01,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:17:01,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:17:01,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:17:01,399 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:17:01,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:17:01,456 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:17:02,100 WARN ]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:17:02,615 WARN ]: Spent 440.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 13:17:02,663 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:17:02,663 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:17:02,663 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 [2018-06-25 13:17:02,669 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:17:02,714 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:17:02,714 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:17:02,718 INFO ]: Computing forward predicates... [2018-06-25 13:17:16,084 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:18,286 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:17:18,306 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:17:18,306 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-25 13:17:18,306 INFO ]: Interpolant automaton has 9 states [2018-06-25 13:17:18,306 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 13:17:18,307 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:17:18,307 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-25 13:17:18,472 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:17:18,472 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:17:18,472 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:17:18,472 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-25 13:17:18,472 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:17:18,472 INFO ]: With dead ends: 14 [2018-06-25 13:17:18,473 INFO ]: Without dead ends: 14 [2018-06-25 13:17:18,473 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:17:18,473 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:17:18,474 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:17:18,474 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:17:18,475 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:17:18,475 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:17:18,475 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:17:18,475 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:17:18,475 INFO ]: Interpolant automaton has 9 states. [2018-06-25 13:17:18,475 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:17:18,475 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:17:18,475 INFO ]: Found error trace [2018-06-25 13:17:18,475 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:17:18,475 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:17:18,475 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-25 13:17:18,475 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:17:18,475 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:17:18,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:17:18,476 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:17:18,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:17:18,550 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:17:18,935 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2018-06-25 13:17:19,122 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-25 13:17:19,191 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:17:19,191 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:17:19,191 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 [2018-06-25 13:17:19,201 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:17:19,264 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:17:19,264 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:17:19,268 INFO ]: Computing forward predicates... [2018-06-25 13:17:20,419 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:20,505 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:20,570 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:20,695 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:20,817 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:17:20,974 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:17:51,927 INFO ]: Timeout while computing interpolants [2018-06-25 13:17:52,128 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:17:52,128 WARN ]: Verification canceled [2018-06-25 13:17:52,132 WARN ]: Timeout [2018-06-25 13:17:52,132 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:17:52 BoogieIcfgContainer [2018-06-25 13:17:52,132 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:17:52,133 INFO ]: Toolchain (without parser) took 69679.36 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 261.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:17:52,134 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:17:52,134 INFO ]: ChcToBoogie took 70.23 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:17:52,135 INFO ]: Boogie Preprocessor took 54.17 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:17:52,135 INFO ]: RCFGBuilder took 304.50 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:17:52,136 INFO ]: TraceAbstraction took 69226.28 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:17:52,139 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 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.23 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.17 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 257.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 304.50 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 247.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69226.28 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.2 MB in the beginning and 1.4 GB in the end (delta: -1.2 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 14 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was transforming 0 conjuction. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 69.1s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 10 SDslu, 107 SDs, 0 SdLazy, 43 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 14 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 107 NumberOfCodeBlocks, 107 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 3435 SizeOfPredicates, 25 NumberOfNonLiveVariables, 835 ConjunctsInSsa, 158 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/70 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/nest-if1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-17-52-157.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if1.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-17-52-157.csv Completed graceful shutdown