java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 13:28:02,804 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 13:28:02,806 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 13:28:02,817 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 13:28:02,817 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 13:28:02,818 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 13:28:02,822 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 13:28:02,824 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 13:28:02,826 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 13:28:02,826 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 13:28:02,827 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 13:28:02,827 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 13:28:02,828 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 13:28:02,830 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 13:28:02,831 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 13:28:02,832 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 13:28:02,833 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 13:28:02,835 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 13:28:02,838 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 13:28:02,839 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 13:28:02,840 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 13:28:02,843 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 13:28:02,843 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 13:28:02,843 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 13:28:02,844 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 13:28:02,845 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 13:28:02,846 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 13:28:02,847 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 13:28:02,848 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 13:28:02,848 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 13:28:02,849 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 13:28:02,849 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 13:28:02,850 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 13:28:02,851 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 13:28:02,851 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 13:28:02,852 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 13:28:02,866 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 13:28:02,866 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 13:28:02,868 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 13:28:02,868 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 13:28:02,869 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 13:28:02,870 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 13:28:02,870 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 13:28:02,870 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 13:28:02,870 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 13:28:02,870 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 13:28:02,871 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 13:28:02,871 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 13:28:02,871 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 13:28:02,871 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 13:28:02,871 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 13:28:02,872 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 13:28:02,872 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 13:28:02,876 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 13:28:02,876 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 13:28:02,929 INFO ]: Repository-Root is: /tmp [2018-06-18 13:28:02,945 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 13:28:02,951 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 13:28:02,953 INFO ]: Initializing SmtParser... [2018-06-18 13:28:02,953 INFO ]: SmtParser initialized [2018-06-18 13:28:02,954 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 [2018-06-18 13:28:02,955 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 [2018-06-18 13:28:03,044 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 unknown [2018-06-18 13:28:03,283 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested3.c.smt2 [2018-06-18 13:28:03,288 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 13:28:03,293 INFO ]: Walking toolchain with 4 elements. [2018-06-18 13:28:03,293 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 13:28:03,293 INFO ]: Initializing ChcToBoogie... [2018-06-18 13:28:03,293 INFO ]: ChcToBoogie initialized [2018-06-18 13:28:03,300 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,354 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03 Unit [2018-06-18 13:28:03,354 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 13:28:03,355 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 13:28:03,355 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 13:28:03,355 INFO ]: Boogie Preprocessor initialized [2018-06-18 13:28:03,376 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,376 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,385 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,385 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,396 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,397 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,398 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (1/1) ... [2018-06-18 13:28:03,400 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 13:28:03,401 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 13:28:03,401 INFO ]: Initializing RCFGBuilder... [2018-06-18 13:28:03,401 INFO ]: RCFGBuilder initialized [2018-06-18 13:28:03,402 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (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) [2018-06-18 13:28:03,415 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 13:28:03,415 INFO ]: Found specification of procedure False [2018-06-18 13:28:03,415 INFO ]: Found implementation of procedure False [2018-06-18 13:28:03,416 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 13:28:03,416 INFO ]: Found specification of procedure state [2018-06-18 13:28:03,416 INFO ]: Found implementation of procedure state [2018-06-18 13:28:03,416 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 13:28:03,416 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 13:28:03,416 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 [2018-06-18 13:28:03,688 INFO ]: Using library mode [2018-06-18 13:28:03,689 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:28:03 BoogieIcfgContainer [2018-06-18 13:28:03,689 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 13:28:03,690 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 13:28:03,690 INFO ]: Initializing TraceAbstraction... [2018-06-18 13:28:03,693 INFO ]: TraceAbstraction initialized [2018-06-18 13:28:03,694 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 01:28:03" (1/3) ... [2018-06-18 13:28:03,694 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3061fb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 01:28:03, skipping insertion in model container [2018-06-18 13:28:03,695 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 01:28:03" (2/3) ... [2018-06-18 13:28:03,695 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3061fb80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 01:28:03, skipping insertion in model container [2018-06-18 13:28:03,695 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 01:28:03" (3/3) ... [2018-06-18 13:28:03,697 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 13:28:03,706 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 13:28:03,714 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 13:28:03,757 INFO ]: Using default assertion order modulation [2018-06-18 13:28:03,758 INFO ]: Interprodecural is true [2018-06-18 13:28:03,758 INFO ]: Hoare is false [2018-06-18 13:28:03,758 INFO ]: Compute interpolants for FPandBP [2018-06-18 13:28:03,758 INFO ]: Backedges is TWOTRACK [2018-06-18 13:28:03,758 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 13:28:03,758 INFO ]: Difference is false [2018-06-18 13:28:03,758 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 13:28:03,758 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 13:28:03,771 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 13:28:03,780 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 13:28:03,780 INFO ]: Found error trace [2018-06-18 13:28:03,781 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:03,781 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:03,785 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 13:28:03,786 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:03,787 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:03,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:03,820 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:03,820 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:03,845 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:03,854 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:03,946 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 13:28:03,947 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 13:28:03,947 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 13:28:03,949 INFO ]: Interpolant automaton has 4 states [2018-06-18 13:28:03,959 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 13:28:03,960 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:28:03,962 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 13:28:04,050 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:04,050 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 13:28:04,051 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 13:28:04,053 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 13:28:04,053 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:04,064 INFO ]: With dead ends: 13 [2018-06-18 13:28:04,064 INFO ]: Without dead ends: 13 [2018-06-18 13:28:04,066 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 13:28:04,082 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 13:28:04,109 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 13:28:04,111 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 13:28:04,112 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 13:28:04,113 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 13:28:04,113 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:04,113 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 13:28:04,113 INFO ]: Interpolant automaton has 4 states. [2018-06-18 13:28:04,113 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 13:28:04,115 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 13:28:04,115 INFO ]: Found error trace [2018-06-18 13:28:04,115 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:04,115 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:04,115 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 13:28:04,115 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:04,115 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:04,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:04,116 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:04,116 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:04,166 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:04,167 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:04,336 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:28:04,336 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:04,336 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 [2018-06-18 13:28:04,348 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:04,388 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:04,395 INFO ]: Computing forward predicates... [2018-06-18 13:28:04,706 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 13:28:04,726 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:04,726 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-18 13:28:04,727 INFO ]: Interpolant automaton has 6 states [2018-06-18 13:28:04,727 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-18 13:28:04,727 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-18 13:28:04,727 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-18 13:28:04,830 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:04,830 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 13:28:04,831 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 13:28:04,831 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-18 13:28:04,831 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:04,832 INFO ]: With dead ends: 15 [2018-06-18 13:28:04,832 INFO ]: Without dead ends: 15 [2018-06-18 13:28:04,832 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-18 13:28:04,833 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 13:28:04,835 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 13:28:04,835 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 13:28:04,836 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 13:28:04,836 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 13:28:04,836 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:04,836 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 13:28:04,836 INFO ]: Interpolant automaton has 6 states. [2018-06-18 13:28:04,836 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 13:28:04,837 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 13:28:04,837 INFO ]: Found error trace [2018-06-18 13:28:04,837 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:04,837 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:04,837 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 13:28:04,837 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:04,837 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:04,838 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:04,838 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:04,838 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:04,873 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:04,873 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:05,600 WARN ]: Spent 480.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 13 [2018-06-18 13:28:05,816 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-18 13:28:05,855 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:28:05,856 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:05,856 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 [2018-06-18 13:28:05,865 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:28:05,918 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:28:05,918 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:05,921 INFO ]: Computing forward predicates... [2018-06-18 13:28:06,151 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 13:28:06,171 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:06,171 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-18 13:28:06,171 INFO ]: Interpolant automaton has 8 states [2018-06-18 13:28:06,171 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 13:28:06,171 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-18 13:28:06,171 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-18 13:28:06,482 WARN ]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-18 13:28:06,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:06,771 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 13:28:06,772 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 13:28:06,772 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-18 13:28:06,772 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:06,772 INFO ]: With dead ends: 17 [2018-06-18 13:28:06,772 INFO ]: Without dead ends: 17 [2018-06-18 13:28:06,773 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-18 13:28:06,773 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 13:28:06,776 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 13:28:06,776 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 13:28:06,776 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 13:28:06,776 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 13:28:06,777 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:06,777 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 13:28:06,777 INFO ]: Interpolant automaton has 8 states. [2018-06-18 13:28:06,777 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 13:28:06,777 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 13:28:06,777 INFO ]: Found error trace [2018-06-18 13:28:06,777 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:06,777 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:06,777 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 13:28:06,778 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:06,778 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:06,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:06,778 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:28:06,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:06,829 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:06,829 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:07,228 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:28:07,229 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:07,229 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 [2018-06-18 13:28:07,236 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 13:28:07,298 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 13:28:07,298 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:07,301 INFO ]: Computing forward predicates... [2018-06-18 13:28:07,510 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 14 [2018-06-18 13:28:07,704 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-06-18 13:28:07,913 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 13:28:07,945 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:07,945 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-18 13:28:07,945 INFO ]: Interpolant automaton has 15 states [2018-06-18 13:28:07,945 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-18 13:28:07,946 INFO ]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-06-18 13:28:07,946 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-18 13:28:08,104 WARN ]: Spent 122.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2018-06-18 13:28:08,374 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-06-18 13:28:08,411 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:08,411 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-18 13:28:08,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-18 13:28:08,412 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-18 13:28:08,412 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:08,412 INFO ]: With dead ends: 19 [2018-06-18 13:28:08,412 INFO ]: Without dead ends: 19 [2018-06-18 13:28:08,413 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-06-18 13:28:08,413 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-18 13:28:08,416 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-18 13:28:08,416 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-18 13:28:08,416 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-18 13:28:08,416 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-18 13:28:08,416 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:08,416 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-18 13:28:08,416 INFO ]: Interpolant automaton has 15 states. [2018-06-18 13:28:08,417 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-18 13:28:08,417 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-18 13:28:08,417 INFO ]: Found error trace [2018-06-18 13:28:08,417 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:08,417 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:08,418 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-18 13:28:08,418 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:08,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:08,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:08,418 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:28:08,418 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:08,454 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:08,455 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:08,904 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-06-18 13:28:09,112 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2018-06-18 13:28:09,191 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:28:09,192 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:09,192 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) [2018-06-18 13:28:09,206 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:28:09,237 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-18 13:28:09,237 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:09,240 INFO ]: Computing forward predicates... [2018-06-18 13:28:10,097 WARN ]: Spent 520.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 31 [2018-06-18 13:28:10,362 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-18 13:28:11,722 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-18 13:28:11,754 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:11,754 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-18 13:28:11,755 INFO ]: Interpolant automaton has 17 states [2018-06-18 13:28:11,755 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-18 13:28:11,755 INFO ]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2018-06-18 13:28:11,755 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-18 13:28:13,636 WARN ]: Spent 1.51 s on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2018-06-18 13:28:13,801 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 21 [2018-06-18 13:28:14,068 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 22 [2018-06-18 13:28:14,303 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2018-06-18 13:28:14,572 WARN ]: Spent 252.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2018-06-18 13:28:14,757 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:14,757 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-18 13:28:14,758 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-18 13:28:14,758 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-18 13:28:14,758 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:14,759 INFO ]: With dead ends: 21 [2018-06-18 13:28:14,759 INFO ]: Without dead ends: 21 [2018-06-18 13:28:14,759 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2018-06-18 13:28:14,759 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-18 13:28:14,764 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-18 13:28:14,764 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-18 13:28:14,765 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-18 13:28:14,765 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-18 13:28:14,765 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:14,765 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-18 13:28:14,765 INFO ]: Interpolant automaton has 17 states. [2018-06-18 13:28:14,765 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-18 13:28:14,766 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-18 13:28:14,766 INFO ]: Found error trace [2018-06-18 13:28:14,766 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:14,766 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:14,766 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-18 13:28:14,766 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:14,766 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:14,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:14,767 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:28:14,767 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:14,837 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:14,837 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:15,215 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:28:15,215 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:15,215 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 [2018-06-18 13:28:15,223 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-18 13:28:15,345 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-18 13:28:15,345 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:15,349 INFO ]: Computing forward predicates... [2018-06-18 13:28:20,559 WARN ]: Spent 4.13 s on a formula simplification. DAG size of input: 639 DAG size of output: 48 [2018-06-18 13:28:21,597 WARN ]: Spent 872.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 43 [2018-06-18 13:28:23,106 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-18 13:28:23,126 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:23,126 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-18 13:28:23,126 INFO ]: Interpolant automaton has 19 states [2018-06-18 13:28:23,126 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-18 13:28:23,126 INFO ]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-06-18 13:28:23,126 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 19 states. [2018-06-18 13:28:23,807 WARN ]: Spent 606.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 84 [2018-06-18 13:28:24,095 WARN ]: Spent 256.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 46 [2018-06-18 13:28:24,386 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 43 [2018-06-18 13:28:24,916 WARN ]: Spent 506.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-06-18 13:28:25,205 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 45 [2018-06-18 13:28:25,812 WARN ]: Spent 575.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2018-06-18 13:28:25,849 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:25,850 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-18 13:28:25,850 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-18 13:28:25,850 INFO ]: Start accepts. Automaton has 19 states. Word has length 29 [2018-06-18 13:28:25,851 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:25,851 INFO ]: With dead ends: 23 [2018-06-18 13:28:25,851 INFO ]: Without dead ends: 23 [2018-06-18 13:28:25,852 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2018-06-18 13:28:25,852 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-18 13:28:25,855 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-18 13:28:25,855 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-18 13:28:25,856 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-18 13:28:25,856 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-18 13:28:25,856 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:25,856 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-18 13:28:25,856 INFO ]: Interpolant automaton has 19 states. [2018-06-18 13:28:25,856 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-18 13:28:25,857 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-18 13:28:25,857 INFO ]: Found error trace [2018-06-18 13:28:25,857 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:25,857 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:25,857 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-18 13:28:25,857 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:25,857 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:25,858 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:25,858 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:28:25,858 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:25,907 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:25,908 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:26,997 WARN ]: Spent 810.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2018-06-18 13:28:27,150 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-18 13:28:27,366 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2018-06-18 13:28:27,818 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:28:27,818 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:27,818 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 [2018-06-18 13:28:27,824 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-18 13:28:27,871 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-18 13:28:27,871 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:27,876 INFO ]: Computing forward predicates... [2018-06-18 13:28:33,679 WARN ]: Spent 5.36 s on a formula simplification. DAG size of input: 578 DAG size of output: 59 [2018-06-18 13:28:34,111 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-18 13:28:34,487 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2018-06-18 13:28:37,483 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-18 13:28:37,513 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:37,513 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2018-06-18 13:28:37,513 INFO ]: Interpolant automaton has 26 states [2018-06-18 13:28:37,513 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-18 13:28:37,514 INFO ]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2018-06-18 13:28:37,514 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 26 states. [2018-06-18 13:28:38,536 WARN ]: Spent 826.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 101 [2018-06-18 13:28:39,045 WARN ]: Spent 437.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 67 [2018-06-18 13:28:39,374 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 44 [2018-06-18 13:28:39,931 WARN ]: Spent 522.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 61 [2018-06-18 13:28:40,801 WARN ]: Spent 835.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 56 [2018-06-18 13:28:41,556 WARN ]: Spent 717.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 46 [2018-06-18 13:28:42,197 WARN ]: Spent 546.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 77 [2018-06-18 13:28:42,227 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:42,227 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-18 13:28:42,228 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-18 13:28:42,228 INFO ]: Start accepts. Automaton has 26 states. Word has length 33 [2018-06-18 13:28:42,228 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:42,229 INFO ]: With dead ends: 25 [2018-06-18 13:28:42,229 INFO ]: Without dead ends: 25 [2018-06-18 13:28:42,229 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2018-06-18 13:28:42,229 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-18 13:28:42,233 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-18 13:28:42,233 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-18 13:28:42,233 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-18 13:28:42,234 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-18 13:28:42,234 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:42,234 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-18 13:28:42,234 INFO ]: Interpolant automaton has 26 states. [2018-06-18 13:28:42,234 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-18 13:28:42,234 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-18 13:28:42,234 INFO ]: Found error trace [2018-06-18 13:28:42,235 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:42,235 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:42,235 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-18 13:28:42,235 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:42,235 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:42,236 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:42,236 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 13:28:42,236 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:42,327 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:42,337 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:43,254 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:28:43,254 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:43,254 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:28:43,264 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:43,304 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:43,309 INFO ]: Computing forward predicates... [2018-06-18 13:28:45,872 WARN ]: Spent 2.21 s on a formula simplification. DAG size of input: 468 DAG size of output: 55 [2018-06-18 13:28:46,066 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2018-06-18 13:28:46,739 WARN ]: Spent 521.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2018-06-18 13:28:46,953 WARN ]: Spent 179.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-18 13:28:47,102 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-18 13:28:48,433 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-18 13:28:48,453 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 13:28:48,453 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2018-06-18 13:28:48,453 INFO ]: Interpolant automaton has 31 states [2018-06-18 13:28:48,453 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-18 13:28:48,454 INFO ]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2018-06-18 13:28:48,454 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 31 states. [2018-06-18 13:28:49,473 WARN ]: Spent 967.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 120 [2018-06-18 13:28:49,744 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 29 [2018-06-18 13:28:50,551 WARN ]: Spent 768.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 66 [2018-06-18 13:28:51,207 WARN ]: Spent 611.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 65 [2018-06-18 13:28:51,979 WARN ]: Spent 725.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 71 [2018-06-18 13:28:52,788 WARN ]: Spent 734.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 64 [2018-06-18 13:28:53,954 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 157 DAG size of output: 69 [2018-06-18 13:28:54,956 WARN ]: Spent 960.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 69 [2018-06-18 13:28:56,249 WARN ]: Spent 1.23 s on a formula simplification. DAG size of input: 155 DAG size of output: 115 [2018-06-18 13:28:56,295 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 13:28:56,295 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-18 13:28:56,295 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-18 13:28:56,295 INFO ]: Start accepts. Automaton has 31 states. Word has length 37 [2018-06-18 13:28:56,296 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 13:28:56,297 INFO ]: With dead ends: 29 [2018-06-18 13:28:56,297 INFO ]: Without dead ends: 29 [2018-06-18 13:28:56,298 INFO ]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=270, Invalid=1290, Unknown=0, NotChecked=0, Total=1560 [2018-06-18 13:28:56,298 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-18 13:28:56,303 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-18 13:28:56,304 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-18 13:28:56,304 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-18 13:28:56,304 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 37 [2018-06-18 13:28:56,305 INFO ]: Finished accepts. word is rejected. [2018-06-18 13:28:56,305 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-18 13:28:56,305 INFO ]: Interpolant automaton has 31 states. [2018-06-18 13:28:56,305 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-18 13:28:56,306 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-18 13:28:56,306 INFO ]: Found error trace [2018-06-18 13:28:56,306 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 13:28:56,306 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 13:28:56,306 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 8 times [2018-06-18 13:28:56,306 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 13:28:56,306 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 13:28:56,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:56,307 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 13:28:56,307 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 13:28:56,385 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:56,386 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 13:28:57,326 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-18 13:28:57,326 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 13:28:57,326 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:28:57,332 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 13:28:57,388 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 13:28:57,388 INFO ]: Conjunction of SSA is unsat [2018-06-18 13:28:57,404 INFO ]: Computing forward predicates... [2018-06-18 13:29:03,386 WARN ]: Spent 5.53 s on a formula simplification. DAG size of input: 741 DAG size of output: 89 [2018-06-18 13:29:03,588 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 Received shutdown request... [2018-06-18 13:29:05,259 WARN ]: Removed 11 from assertion stack [2018-06-18 13:29:05,259 INFO ]: Timeout while computing interpolants [2018-06-18 13:29:05,459 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 13:29:05,459 WARN ]: Verification canceled [2018-06-18 13:29:05,464 WARN ]: Timeout [2018-06-18 13:29:05,464 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 01:29:05 BoogieIcfgContainer [2018-06-18 13:29:05,465 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 13:29:05,465 INFO ]: Toolchain (without parser) took 62177.19 ms. Allocated memory was 303.6 MB in the beginning and 696.8 MB in the end (delta: 393.2 MB). Free memory was 258.0 MB in the beginning and 369.6 MB in the end (delta: -111.7 MB). Peak memory consumption was 469.3 MB. Max. memory is 3.6 GB. [2018-06-18 13:29:05,466 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 13:29:05,467 INFO ]: ChcToBoogie took 61.52 ms. Allocated memory is still 303.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:29:05,467 INFO ]: Boogie Preprocessor took 45.38 ms. Allocated memory is still 303.6 MB. Free memory was 255.0 MB in the beginning and 253.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 13:29:05,468 INFO ]: RCFGBuilder took 288.09 ms. Allocated memory is still 303.6 MB. Free memory was 253.0 MB in the beginning and 244.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. [2018-06-18 13:29:05,473 INFO ]: TraceAbstraction took 61774.29 ms. Allocated memory was 303.6 MB in the beginning and 696.8 MB in the end (delta: 393.2 MB). Free memory was 244.9 MB in the beginning and 369.6 MB in the end (delta: -124.8 MB). Peak memory consumption was 456.2 MB. Max. memory is 3.6 GB. [2018-06-18 13:29:05,476 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 303.6 MB. Free memory is still 269.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.52 ms. Allocated memory is still 303.6 MB. Free memory was 257.0 MB in the beginning and 255.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.38 ms. Allocated memory is still 303.6 MB. Free memory was 255.0 MB in the beginning and 253.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 288.09 ms. Allocated memory is still 303.6 MB. Free memory was 253.0 MB in the beginning and 244.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61774.29 ms. Allocated memory was 303.6 MB in the beginning and 696.8 MB in the end (delta: 393.2 MB). Free memory was 244.9 MB in the beginning and 369.6 MB in the end (delta: -124.8 MB). Peak memory consumption was 456.2 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 46 with TraceHistMax 10, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 349. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.7s OverallTime, 9 OverallIterations, 10 TraceHistogramMax, 19.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 102 SDtfs, 285 SDslu, 586 SDs, 0 SdLazy, 509 SolverSat, 352 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 291 GetRequests, 135 SyntacticMatches, 11 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 41.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 31.7s InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 344 ConstructedInterpolants, 0 QuantifiedInterpolants, 775004 SizeOfPredicates, 352 NumberOfNonLiveVariables, 1204 ConjunctsInSsa, 292 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 168/616 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/nested3.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_13-29-05-493.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested3.c.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_13-29-05-493.csv Completed graceful shutdown