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/nested6.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:13:50,895 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:13:50,897 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:13:50,912 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:13:50,912 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:13:50,914 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:13:50,915 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:13:50,917 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:13:50,918 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:13:50,919 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:13:50,921 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:13:50,921 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:13:50,922 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:13:50,923 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:13:50,924 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:13:50,924 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:13:50,928 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:13:50,929 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:13:50,939 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:13:50,940 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:13:50,941 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:13:50,943 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:13:50,943 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:13:50,943 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:13:50,947 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:13:50,948 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:13:50,949 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:13:50,949 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:13:50,950 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:13:50,950 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:13:50,954 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:13:50,954 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:13:50,955 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:13:50,955 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:13:50,956 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:13:50,956 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:13:50,972 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:13:50,973 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:13:50,973 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:13:50,973 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:13:50,974 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:13:50,974 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:13:50,975 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:13:50,975 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:13:50,975 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:13:50,975 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:13:50,975 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:13:50,976 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:13:50,976 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:13:50,976 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:13:50,976 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:13:50,976 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:13:50,976 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:13:50,977 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:13:50,977 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:13:50,977 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:13:50,977 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:13:50,978 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:13:50,979 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:13:51,027 INFO ]: Repository-Root is: /tmp [2018-06-25 13:13:51,038 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:13:51,042 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:13:51,044 INFO ]: Initializing SmtParser... [2018-06-25 13:13:51,044 INFO ]: SmtParser initialized [2018-06-25 13:13:51,045 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 [2018-06-25 13:13:51,046 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 13:13:51,135 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 unknown [2018-06-25 13:13:51,393 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested6.c.smt2 [2018-06-25 13:13:51,398 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:13:51,405 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:13:51,406 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:13:51,406 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:13:51,406 INFO ]: ChcToBoogie initialized [2018-06-25 13:13:51,409 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,468 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51 Unit [2018-06-25 13:13:51,469 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:13:51,469 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:13:51,469 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:13:51,469 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:13:51,490 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,491 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,498 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,498 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,514 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,516 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,517 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (1/1) ... [2018-06-25 13:13:51,529 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:13:51,529 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:13:51,529 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:13:51,529 INFO ]: RCFGBuilder initialized [2018-06-25 13:13:51,530 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (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 13:13:51,548 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:13:51,549 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:13:51,549 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:13:51,549 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:13:51,549 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:13:51,549 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 13:13:51,857 INFO ]: Using library mode [2018-06-25 13:13:51,858 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:13:51 BoogieIcfgContainer [2018-06-25 13:13:51,858 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:13:51,859 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:13:51,859 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:13:51,862 INFO ]: TraceAbstraction initialized [2018-06-25 13:13:51,863 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:13:51" (1/3) ... [2018-06-25 13:13:51,863 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b55496b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:13:51, skipping insertion in model container [2018-06-25 13:13:51,864 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:13:51" (2/3) ... [2018-06-25 13:13:51,864 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b55496b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:13:51, skipping insertion in model container [2018-06-25 13:13:51,864 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:13:51" (3/3) ... [2018-06-25 13:13:51,865 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:13:51,874 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:13:51,882 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:13:51,945 INFO ]: Using default assertion order modulation [2018-06-25 13:13:51,946 INFO ]: Interprodecural is true [2018-06-25 13:13:51,946 INFO ]: Hoare is false [2018-06-25 13:13:51,946 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:13:51,946 INFO ]: Backedges is TWOTRACK [2018-06-25 13:13:51,946 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:13:51,946 INFO ]: Difference is false [2018-06-25 13:13:51,946 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:13:51,946 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:13:51,963 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:13:51,977 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:13:51,978 INFO ]: Found error trace [2018-06-25 13:13:51,978 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:13:51,979 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:13:51,984 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 13:13:51,987 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:13:51,987 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:13:52,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:52,024 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:13:52,024 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:52,071 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:13:52,125 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:13:52,128 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:13:52,128 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:13:52,130 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:13:52,146 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:13:52,146 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:13:52,149 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:13:52,238 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:13:52,238 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:13:52,239 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:13:52,240 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:13:52,241 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:13:52,249 INFO ]: With dead ends: 9 [2018-06-25 13:13:52,250 INFO ]: Without dead ends: 9 [2018-06-25 13:13:52,251 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 13:13:52,263 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:13:52,278 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:13:52,280 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:13:52,280 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:13:52,281 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:13:52,281 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:13:52,281 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:13:52,281 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:13:52,282 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:13:52,282 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:13:52,282 INFO ]: Found error trace [2018-06-25 13:13:52,282 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:13:52,282 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:13:52,282 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 13:13:52,282 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:13:52,282 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:13:52,283 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:52,283 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:13:52,283 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:52,323 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:13:52,496 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:13:52,496 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:13:52,496 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 13:13:52,506 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:13:52,567 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:13:52,576 INFO ]: Computing forward predicates... [2018-06-25 13:13:53,520 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:13:53,553 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:13:53,553 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 13:13:53,554 INFO ]: Interpolant automaton has 5 states [2018-06-25 13:13:53,554 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 13:13:53,554 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 13:13:53,554 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 13:13:53,687 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-25 13:13:53,783 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:13:53,783 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:13:53,784 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 13:13:53,784 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 13:13:53,784 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:13:53,784 INFO ]: With dead ends: 11 [2018-06-25 13:13:53,784 INFO ]: Without dead ends: 11 [2018-06-25 13:13:53,785 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:13:53,785 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:13:53,786 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:13:53,786 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:13:53,787 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:13:53,787 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-25 13:13:53,787 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:13:53,787 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:13:53,787 INFO ]: Interpolant automaton has 5 states. [2018-06-25 13:13:53,787 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:13:53,787 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:13:53,787 INFO ]: Found error trace [2018-06-25 13:13:53,787 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:13:53,787 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:13:53,787 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 2 times [2018-06-25 13:13:53,787 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:13:53,787 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:13:53,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:53,789 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:13:53,789 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:53,902 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:13:54,298 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-25 13:13:54,359 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:13:54,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:13:54,359 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 [2018-06-25 13:13:54,366 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:13:54,446 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:13:54,446 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:13:54,450 INFO ]: Computing forward predicates... [2018-06-25 13:13:59,758 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:13:59,778 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:13:59,778 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 13:13:59,778 INFO ]: Interpolant automaton has 7 states [2018-06-25 13:13:59,779 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 13:13:59,779 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-25 13:13:59,779 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-25 13:13:59,900 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:13:59,900 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:13:59,900 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:13:59,900 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-25 13:13:59,900 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:13:59,900 INFO ]: With dead ends: 12 [2018-06-25 13:13:59,900 INFO ]: Without dead ends: 12 [2018-06-25 13:13:59,901 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-25 13:13:59,901 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:13:59,902 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:13:59,902 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:13:59,902 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:13:59,902 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:13:59,902 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:13:59,902 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:13:59,902 INFO ]: Interpolant automaton has 7 states. [2018-06-25 13:13:59,902 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:13:59,902 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:13:59,902 INFO ]: Found error trace [2018-06-25 13:13:59,902 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:13:59,902 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:13:59,902 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 13:13:59,903 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:13:59,903 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:13:59,903 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:59,904 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:13:59,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:13:59,976 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:00,291 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-25 13:14:00,397 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:00,398 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:14:00,398 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 13:14:00,407 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:14:00,505 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:14:00,505 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:00,509 INFO ]: Computing forward predicates... [2018-06-25 13:14:04,116 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:04,137 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:14:04,137 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:14:04,137 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:14:04,137 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:14:04,138 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:14:04,138 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:14:04,416 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:14:04,416 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:14:04,416 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:14:04,416 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:14:04,416 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:14:04,417 INFO ]: With dead ends: 13 [2018-06-25 13:14:04,417 INFO ]: Without dead ends: 13 [2018-06-25 13:14:04,417 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:14:04,417 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:14:04,418 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:14:04,419 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:14:04,420 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:14:04,420 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:14:04,420 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:14:04,420 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:14:04,420 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:14:04,420 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:14:04,421 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:14:04,421 INFO ]: Found error trace [2018-06-25 13:14:04,421 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:14:04,421 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:14:04,421 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 13:14:04,421 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:14:04,421 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:14:04,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:04,422 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:14:04,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:04,487 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:04,788 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 8 [2018-06-25 13:14:04,908 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-06-25 13:14:05,027 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 16 [2018-06-25 13:14:05,138 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-06-25 13:14:05,177 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:05,177 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:14:05,177 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 13:14:05,183 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:14:05,234 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:14:05,234 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:05,238 INFO ]: Computing forward predicates... [2018-06-25 13:14:05,654 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:14:07,467 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:14:07,566 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:14:07,581 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:14:16,251 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:16,270 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:14:16,270 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-25 13:14:16,270 INFO ]: Interpolant automaton has 9 states [2018-06-25 13:14:16,270 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 13:14:16,270 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-25 13:14:16,271 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-25 13:14:16,567 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:14:16,567 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:14:16,568 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:14:16,568 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-25 13:14:16,568 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:14:16,568 INFO ]: With dead ends: 14 [2018-06-25 13:14:16,568 INFO ]: Without dead ends: 14 [2018-06-25 13:14:16,568 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-25 13:14:16,569 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:14:16,573 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:14:16,573 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:14:16,573 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:14:16,573 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:14:16,573 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:14:16,573 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:14:16,573 INFO ]: Interpolant automaton has 9 states. [2018-06-25 13:14:16,574 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:14:16,574 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:14:16,574 INFO ]: Found error trace [2018-06-25 13:14:16,574 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:14:16,574 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:14:16,574 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 5 times [2018-06-25 13:14:16,574 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:14:16,574 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:14:16,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:16,575 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:14:16,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:16,673 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:17,166 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 5 [2018-06-25 13:14:17,412 WARN ]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-25 13:14:17,501 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:17,501 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:14:17,501 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 13:14:17,509 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:14:17,594 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:14:17,594 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:17,598 INFO ]: Computing forward predicates... [2018-06-25 13:14:17,787 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:14:29,909 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:14:37,792 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:37,825 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:14:37,825 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-25 13:14:37,825 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:14:37,826 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:14:37,826 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:14:37,826 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-25 13:14:38,109 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:14:38,109 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:14:38,109 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:14:38,109 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-25 13:14:38,109 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:14:38,110 INFO ]: With dead ends: 15 [2018-06-25 13:14:38,110 INFO ]: Without dead ends: 15 [2018-06-25 13:14:38,110 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:14:38,110 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:14:38,111 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:14:38,111 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:14:38,112 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:14:38,112 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:14:38,112 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:14:38,112 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:14:38,112 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:14:38,112 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:14:38,112 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:14:38,112 INFO ]: Found error trace [2018-06-25 13:14:38,112 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:14:38,112 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:14:38,112 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 6 times [2018-06-25 13:14:38,113 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:14:38,113 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:14:38,113 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:38,113 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:14:38,113 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:14:38,226 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:38,543 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:14:39,164 WARN ]: Spent 573.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-25 13:14:39,444 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:14:39,444 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:14:39,444 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 13:14:39,454 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:14:39,530 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-25 13:14:39,530 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:14:39,534 INFO ]: Computing forward predicates... [2018-06-25 13:14:39,849 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 17 [2018-06-25 13:14:40,420 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:14:42,201 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 19 [2018-06-25 13:14:44,609 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:14:53,564 INFO ]: Timeout while computing interpolants [2018-06-25 13:14:53,826 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:14:53,827 WARN ]: Verification canceled [2018-06-25 13:14:53,833 WARN ]: Timeout [2018-06-25 13:14:53,833 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:14:53 BoogieIcfgContainer [2018-06-25 13:14:53,833 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:14:53,834 INFO ]: Toolchain (without parser) took 62435.90 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 255.5 MB in the beginning and 977.3 MB in the end (delta: -721.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:14:53,835 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:14:53,835 INFO ]: ChcToBoogie took 63.34 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:14:53,835 INFO ]: Boogie Preprocessor took 59.49 ms. Allocated memory is still 305.1 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:14:53,836 INFO ]: RCFGBuilder took 329.01 ms. Allocated memory is still 305.1 MB. Free memory was 251.5 MB in the beginning and 241.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:14:53,836 INFO ]: TraceAbstraction took 61973.79 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 241.5 MB in the beginning and 977.3 MB in the end (delta: -735.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:14:53,840 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 63.34 ms. Allocated memory is still 305.1 MB. Free memory was 255.5 MB in the beginning and 253.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 59.49 ms. Allocated memory is still 305.1 MB. Free memory was 253.5 MB in the beginning and 251.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 329.01 ms. Allocated memory is still 305.1 MB. Free memory was 251.5 MB in the beginning and 241.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61973.79 ms. Allocated memory was 305.1 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 241.5 MB in the beginning and 977.3 MB in the end (delta: -735.8 MB). 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 18886 quantified variables from 13 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 61.8s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 42 SDtfs, 14 SDslu, 131 SDs, 0 SdLazy, 51 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 19 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred 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, 0.7s SatisfiabilityAnalysisTime, 43.7s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 5901 SizeOfPredicates, 25 NumberOfNonLiveVariables, 1127 ConjunctsInSsa, 185 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 0/106 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/nested6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-14-53-854.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested6.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-14-53-854.csv Completed graceful shutdown