java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:20:29,956 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:20:29,958 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:20:29,971 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:20:29,971 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:20:29,972 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:20:29,973 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:20:29,977 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:20:29,979 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:20:29,979 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:20:29,981 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:20:29,981 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:20:29,982 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:20:29,985 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:20:29,986 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:20:29,987 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:20:29,991 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:20:29,993 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:20:30,006 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:20:30,007 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:20:30,008 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:20:30,010 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:20:30,010 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:20:30,011 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:20:30,011 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:20:30,012 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:20:30,013 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:20:30,014 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:20:30,014 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:20:30,015 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:20:30,019 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:20:30,019 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:20:30,020 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:20:30,020 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:20:30,021 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:20:30,021 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:20:30,045 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:20:30,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:20:30,046 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:20:30,046 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:20:30,047 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:20:30,047 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:20:30,048 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:20:30,048 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:20:30,048 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:20:30,048 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:20:30,048 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:20:30,051 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:20:30,051 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:20:30,052 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:20:30,054 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:20:30,054 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:20:30,103 INFO ]: Repository-Root is: /tmp [2018-06-22 15:20:30,118 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:20:30,123 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:20:30,125 INFO ]: Initializing SmtParser... [2018-06-22 15:20:30,125 INFO ]: SmtParser initialized [2018-06-22 15:20:30,126 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-22 15:20:30,127 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 15:20:30,215 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 unknown [2018-06-22 15:20:30,468 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if3.c.smt2 [2018-06-22 15:20:30,477 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:20:30,482 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:20:30,483 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:20:30,483 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:20:30,483 INFO ]: ChcToBoogie initialized [2018-06-22 15:20:30,486 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,537 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30 Unit [2018-06-22 15:20:30,537 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:20:30,538 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:20:30,538 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:20:30,538 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:20:30,562 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,562 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,570 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,570 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,574 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,576 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,577 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... [2018-06-22 15:20:30,579 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:20:30,579 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:20:30,579 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:20:30,579 INFO ]: RCFGBuilder initialized [2018-06-22 15:20:30,585 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 15:20:30,597 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:20:30,597 INFO ]: Found specification of procedure False [2018-06-22 15:20:30,597 INFO ]: Found implementation of procedure False [2018-06-22 15:20:30,597 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:20:30,597 INFO ]: Found specification of procedure state [2018-06-22 15:20:30,597 INFO ]: Found implementation of procedure state [2018-06-22 15:20:30,597 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:20:30,597 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:20:30,597 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:20:30,792 INFO ]: Using library mode [2018-06-22 15:20:30,793 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:20:30 BoogieIcfgContainer [2018-06-22 15:20:30,793 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:20:30,795 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:20:30,795 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:20:30,797 INFO ]: TraceAbstraction initialized [2018-06-22 15:20:30,798 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:20:30" (1/3) ... [2018-06-22 15:20:30,799 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fc6512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:20:30, skipping insertion in model container [2018-06-22 15:20:30,799 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:20:30" (2/3) ... [2018-06-22 15:20:30,799 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62fc6512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:20:30, skipping insertion in model container [2018-06-22 15:20:30,799 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:20:30" (3/3) ... [2018-06-22 15:20:30,801 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:20:30,810 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:20:30,817 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:20:30,856 INFO ]: Using default assertion order modulation [2018-06-22 15:20:30,857 INFO ]: Interprodecural is true [2018-06-22 15:20:30,857 INFO ]: Hoare is false [2018-06-22 15:20:30,857 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:20:30,857 INFO ]: Backedges is TWOTRACK [2018-06-22 15:20:30,857 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:20:30,857 INFO ]: Difference is false [2018-06-22 15:20:30,857 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:20:30,857 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:20:30,870 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:20:30,882 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:20:30,882 INFO ]: Found error trace [2018-06-22 15:20:30,883 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:30,883 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:30,889 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:20:30,891 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:30,891 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:30,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:30,925 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:30,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:30,960 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:31,039 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:20:31,042 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:20:31,042 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:20:31,044 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:20:31,061 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:20:31,062 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:20:31,064 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:20:31,182 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:31,183 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:20:31,184 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:20:31,186 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:20:31,186 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:31,197 INFO ]: With dead ends: 13 [2018-06-22 15:20:31,197 INFO ]: Without dead ends: 13 [2018-06-22 15:20:31,200 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:20:31,215 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:20:31,234 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:20:31,235 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:20:31,236 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:20:31,237 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:20:31,237 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:31,237 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:20:31,237 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:20:31,237 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:20:31,239 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:20:31,239 INFO ]: Found error trace [2018-06-22 15:20:31,239 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:31,239 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:31,239 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:20:31,239 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:31,239 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:31,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:31,241 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:31,241 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:31,292 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:31,463 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:20:31,463 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:31,463 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:31,473 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:31,515 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:31,525 INFO ]: Computing forward predicates... [2018-06-22 15:20:31,771 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:20:31,791 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:31,791 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:20:31,792 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:20:31,792 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:20:31,792 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:20:31,792 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:20:31,939 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:31,940 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:20:31,941 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:20:31,941 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:20:31,941 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:31,941 INFO ]: With dead ends: 15 [2018-06-22 15:20:31,941 INFO ]: Without dead ends: 15 [2018-06-22 15:20:31,942 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:20:31,942 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:20:31,946 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:20:31,946 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:20:31,947 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:20:31,947 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:20:31,947 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:31,947 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:20:31,947 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:20:31,947 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:20:31,948 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:20:31,948 INFO ]: Found error trace [2018-06-22 15:20:31,948 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:31,948 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:31,948 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:20:31,948 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:31,948 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:31,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:31,949 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:20:31,949 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:32,010 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:32,415 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 15:20:32,675 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2018-06-22 15:20:32,757 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:20:32,757 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:32,757 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:32,770 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:20:32,806 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:20:32,806 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:32,809 INFO ]: Computing forward predicates... [2018-06-22 15:20:33,243 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:20:33,264 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:33,265 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:20:33,265 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:20:33,265 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:20:33,265 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:20:33,265 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:20:33,808 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 16 [2018-06-22 15:20:33,837 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:33,837 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:20:33,838 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:20:33,838 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:20:33,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:33,838 INFO ]: With dead ends: 17 [2018-06-22 15:20:33,838 INFO ]: Without dead ends: 17 [2018-06-22 15:20:33,839 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:20:33,839 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:20:33,842 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:20:33,842 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:20:33,843 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:20:33,843 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:20:33,843 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:33,843 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:20:33,843 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:20:33,843 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:20:33,844 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:20:33,844 INFO ]: Found error trace [2018-06-22 15:20:33,844 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:33,844 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:33,844 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:20:33,844 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:33,844 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:33,845 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:33,845 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:33,845 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:33,883 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:34,249 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:20:34,249 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:34,249 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:34,266 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:20:34,306 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:20:34,306 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:34,310 INFO ]: Computing forward predicates... [2018-06-22 15:20:35,734 WARN ]: Spent 973.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 20 [2018-06-22 15:20:35,920 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:20:35,953 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:35,953 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-22 15:20:35,953 INFO ]: Interpolant automaton has 12 states [2018-06-22 15:20:35,953 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 15:20:35,954 INFO ]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2018-06-22 15:20:35,954 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 12 states. [2018-06-22 15:20:36,165 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2018-06-22 15:20:36,291 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2018-06-22 15:20:36,420 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 26 [2018-06-22 15:20:36,603 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-06-22 15:20:36,621 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:36,622 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:20:36,622 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:20:36,622 INFO ]: Start accepts. Automaton has 12 states. Word has length 21 [2018-06-22 15:20:36,622 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:36,623 INFO ]: With dead ends: 19 [2018-06-22 15:20:36,623 INFO ]: Without dead ends: 19 [2018-06-22 15:20:36,623 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:20:36,624 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:20:36,627 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:20:36,627 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:20:36,628 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:20:36,628 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:20:36,628 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:36,628 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:20:36,628 INFO ]: Interpolant automaton has 12 states. [2018-06-22 15:20:36,628 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:20:36,629 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:20:36,629 INFO ]: Found error trace [2018-06-22 15:20:36,629 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:36,629 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:36,629 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:20:36,629 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:36,629 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:36,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:36,630 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:36,630 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:36,679 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:37,714 WARN ]: Spent 871.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-06-22 15:20:37,986 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:20:37,986 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:37,986 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:37,992 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:20:38,029 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:20:38,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:38,033 INFO ]: Computing forward predicates... [2018-06-22 15:20:50,673 WARN ]: Spent 11.51 s on a formula simplification. DAG size of input: 1011 DAG size of output: 91 [2018-06-22 15:20:51,845 WARN ]: Spent 687.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-06-22 15:20:54,797 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:20:54,829 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:20:54,829 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 15:20:54,829 INFO ]: Interpolant automaton has 16 states [2018-06-22 15:20:54,829 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 15:20:54,830 INFO ]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2018-06-22 15:20:54,830 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 16 states. [2018-06-22 15:20:55,928 WARN ]: Spent 1.06 s on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2018-06-22 15:20:56,228 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 24 [2018-06-22 15:20:56,631 WARN ]: Spent 378.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 36 [2018-06-22 15:20:57,588 WARN ]: Spent 933.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 66 [2018-06-22 15:20:58,027 WARN ]: Spent 416.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 44 [2018-06-22 15:20:58,051 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:20:58,051 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:20:58,052 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:20:58,052 INFO ]: Start accepts. Automaton has 16 states. Word has length 25 [2018-06-22 15:20:58,052 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:20:58,053 INFO ]: With dead ends: 21 [2018-06-22 15:20:58,053 INFO ]: Without dead ends: 21 [2018-06-22 15:20:58,053 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:20:58,053 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:20:58,056 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:20:58,056 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:20:58,057 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:20:58,057 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:20:58,058 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:20:58,058 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:20:58,058 INFO ]: Interpolant automaton has 16 states. [2018-06-22 15:20:58,058 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:20:58,059 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:20:58,059 INFO ]: Found error trace [2018-06-22 15:20:58,059 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:20:58,059 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:20:58,059 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:20:58,059 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:20:58,059 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:20:58,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:58,060 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:20:58,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:20:58,137 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:58,532 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-06-22 15:20:58,652 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2018-06-22 15:20:58,887 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:20:58,887 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:20:58,887 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:58,898 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:20:59,010 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:20:59,010 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:20:59,016 INFO ]: Computing forward predicates... [2018-06-22 15:20:59,498 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 17 [2018-06-22 15:21:00,378 WARN ]: Spent 436.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 15:21:00,616 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:21:00,637 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:00,637 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 15:21:00,637 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:21:00,637 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:21:00,637 INFO ]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:21:00,638 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 15:21:00,948 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-06-22 15:21:01,256 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2018-06-22 15:21:01,443 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2018-06-22 15:21:01,628 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2018-06-22 15:21:01,934 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2018-06-22 15:21:01,977 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:21:01,978 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:21:01,978 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:21:01,978 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 15:21:01,979 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:21:01,979 INFO ]: With dead ends: 23 [2018-06-22 15:21:01,979 INFO ]: Without dead ends: 23 [2018-06-22 15:21:01,980 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:21:01,980 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:21:01,983 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:21:01,983 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:21:01,984 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:21:01,984 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:21:01,984 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:21:01,984 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:21:01,984 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:21:01,984 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:21:01,985 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:21:01,985 INFO ]: Found error trace [2018-06-22 15:21:01,985 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:21:01,985 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:21:01,985 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:21:01,985 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:21:01,985 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:21:01,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:01,986 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:21:01,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:02,045 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:02,625 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2018-06-22 15:21:03,056 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:21:03,056 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:21:03,056 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:21:03,062 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:21:03,114 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:21:03,114 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:03,119 INFO ]: Computing forward predicates... [2018-06-22 15:21:03,672 WARN ]: Spent 482.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 43 [2018-06-22 15:21:03,883 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 15:21:04,027 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-06-22 15:21:04,203 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 15:21:05,154 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:21:05,183 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:05,183 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2018-06-22 15:21:05,184 INFO ]: Interpolant automaton has 27 states [2018-06-22 15:21:05,184 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 15:21:05,184 INFO ]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:21:05,184 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-22 15:21:05,956 WARN ]: Spent 587.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2018-06-22 15:21:06,341 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 46 [2018-06-22 15:21:06,747 WARN ]: Spent 365.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 56 [2018-06-22 15:21:07,388 WARN ]: Spent 596.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2018-06-22 15:21:07,748 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 57 [2018-06-22 15:21:08,142 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2018-06-22 15:21:08,554 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-06-22 15:21:08,594 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:21:08,594 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:21:08,594 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:21:08,594 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-22 15:21:08,595 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:21:08,595 INFO ]: With dead ends: 25 [2018-06-22 15:21:08,595 INFO ]: Without dead ends: 25 [2018-06-22 15:21:08,596 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 15:21:08,596 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:21:08,598 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:21:08,598 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:21:08,599 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:21:08,599 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:21:08,599 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:21:08,599 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:21:08,599 INFO ]: Interpolant automaton has 27 states. [2018-06-22 15:21:08,599 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:21:08,600 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:21:08,600 INFO ]: Found error trace [2018-06-22 15:21:08,600 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:21:08,600 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:21:08,600 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:21:08,600 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:21:08,600 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:21:08,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:08,601 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:21:08,601 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:08,674 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:09,635 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:21:09,635 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:21:09,635 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:21:09,643 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:21:09,711 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:09,716 INFO ]: Computing forward predicates... [2018-06-22 15:21:09,971 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2018-06-22 15:21:10,714 WARN ]: Spent 641.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2018-06-22 15:21:10,907 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 15:21:11,214 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2018-06-22 15:21:12,468 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:21:12,488 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:12,488 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2018-06-22 15:21:12,488 INFO ]: Interpolant automaton has 31 states [2018-06-22 15:21:12,488 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 15:21:12,489 INFO ]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:21:12,489 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 31 states. [2018-06-22 15:21:13,527 WARN ]: Spent 980.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 90 [2018-06-22 15:21:13,903 WARN ]: Spent 320.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 34 [2018-06-22 15:21:14,339 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 40 [2018-06-22 15:21:14,832 WARN ]: Spent 450.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 53 [2018-06-22 15:21:15,260 WARN ]: Spent 388.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 53 [2018-06-22 15:21:15,703 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 49 [2018-06-22 15:21:16,503 WARN ]: Spent 760.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 56 [2018-06-22 15:21:17,044 WARN ]: Spent 498.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 57 [2018-06-22 15:21:17,091 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:21:17,091 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:21:17,091 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:21:17,091 INFO ]: Start accepts. Automaton has 31 states. Word has length 37 [2018-06-22 15:21:17,092 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:21:17,092 INFO ]: With dead ends: 27 [2018-06-22 15:21:17,092 INFO ]: Without dead ends: 27 [2018-06-22 15:21:17,093 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 15:21:17,093 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:21:17,097 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:21:17,098 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:21:17,098 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:21:17,098 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:21:17,099 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:21:17,099 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:21:17,099 INFO ]: Interpolant automaton has 31 states. [2018-06-22 15:21:17,099 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:21:17,102 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:21:17,102 INFO ]: Found error trace [2018-06-22 15:21:17,102 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:21:17,102 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:21:17,102 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:21:17,102 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:21:17,102 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:21:17,103 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:17,103 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:21:17,103 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:21:17,177 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:18,016 WARN ]: Spent 568.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 21 [2018-06-22 15:21:18,238 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41 [2018-06-22 15:21:18,437 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2018-06-22 15:21:18,836 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2018-06-22 15:21:19,344 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:21:19,345 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:21:19,345 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:21:19,350 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:21:19,399 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:21:19,399 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:21:19,406 INFO ]: Computing forward predicates... [2018-06-22 15:21:19,924 WARN ]: Spent 453.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 45 [2018-06-22 15:21:20,343 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2018-06-22 15:21:23,578 WARN ]: Spent 2.94 s on a formula simplification. DAG size of input: 235 DAG size of output: 49 [2018-06-22 15:21:23,766 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-22 15:21:24,047 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2018-06-22 15:21:24,431 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 31 [2018-06-22 15:21:26,753 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:21:26,773 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:21:26,773 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 32 [2018-06-22 15:21:26,773 INFO ]: Interpolant automaton has 32 states [2018-06-22 15:21:26,773 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 15:21:26,774 INFO ]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2018-06-22 15:21:26,774 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 32 states. [2018-06-22 15:21:28,279 WARN ]: Spent 1.43 s on a formula simplification. DAG size of input: 166 DAG size of output: 122 [2018-06-22 15:21:28,720 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 36 [2018-06-22 15:21:29,320 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 51 [2018-06-22 15:21:29,890 WARN ]: Spent 520.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 58 [2018-06-22 15:21:30,486 WARN ]: Spent 550.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 51 [2018-06-22 15:21:31,115 WARN ]: Spent 579.00 ms on a formula simplification. DAG size of input: 171 DAG size of output: 53 Received shutdown request... [2018-06-22 15:21:31,746 WARN ]: Removed 10 from assertion stack [2018-06-22 15:21:31,746 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:21:31,746 WARN ]: Verification canceled [2018-06-22 15:21:31,749 WARN ]: Timeout [2018-06-22 15:21:31,749 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:21:31 BoogieIcfgContainer [2018-06-22 15:21:31,749 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:21:31,750 INFO ]: Toolchain (without parser) took 61271.83 ms. Allocated memory was 309.3 MB in the beginning and 802.7 MB in the end (delta: 493.4 MB). Free memory was 262.9 MB in the beginning and 708.1 MB in the end (delta: -445.3 MB). Peak memory consumption was 564.3 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:31,750 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:21:31,750 INFO ]: ChcToBoogie took 54.41 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 259.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:31,751 INFO ]: Boogie Preprocessor took 40.78 ms. Allocated memory is still 309.3 MB. Free memory was 259.9 MB in the beginning and 258.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 15:21:31,751 INFO ]: RCFGBuilder took 213.81 ms. Allocated memory is still 309.3 MB. Free memory was 258.9 MB in the beginning and 249.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:31,751 INFO ]: TraceAbstraction took 60954.55 ms. Allocated memory was 309.3 MB in the beginning and 802.7 MB in the end (delta: 493.4 MB). Free memory was 248.9 MB in the beginning and 708.1 MB in the end (delta: -459.3 MB). Peak memory consumption was 550.3 MB. Max. memory is 3.6 GB. [2018-06-22 15:21:31,754 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 54.41 ms. Allocated memory is still 309.3 MB. Free memory was 261.9 MB in the beginning and 259.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.78 ms. Allocated memory is still 309.3 MB. Free memory was 259.9 MB in the beginning and 258.9 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 213.81 ms. Allocated memory is still 309.3 MB. Free memory was 258.9 MB in the beginning and 249.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60954.55 ms. Allocated memory was 309.3 MB in the beginning and 802.7 MB in the end (delta: 493.4 MB). Free memory was 248.9 MB in the beginning and 708.1 MB in the end (delta: -459.3 MB). Peak memory consumption was 550.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (27states) and interpolant automaton (currently 10 states, 32 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 169. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 60.8s OverallTime, 9 OverallIterations, 9 TraceHistogramMax, 19.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 116 SDtfs, 328 SDslu, 692 SDs, 0 SdLazy, 621 SolverSat, 411 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 356 GetRequests, 161 SyntacticMatches, 17 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 772 ImplicationChecksByTransitivity, 48.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 441 NumberOfCodeBlocks, 441 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 2817824 SizeOfPredicates, 498 NumberOfNonLiveVariables, 1720 ConjunctsInSsa, 405 ConjunctsInUnsatCore, 17 InterpolantComputations, 1 PerfectInterpolantSequences, 240/888 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-21-31-764.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if3.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-21-31-764.csv Completed graceful shutdown