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-if1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:19:11,942 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:19:11,944 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:19:11,955 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:19:11,956 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:19:11,957 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:19:11,960 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:19:11,962 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:19:11,964 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:19:11,964 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:19:11,966 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:19:11,966 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:19:11,967 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:19:11,968 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:19:11,969 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:19:11,970 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:19:11,974 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:19:11,975 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:19:11,988 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:19:11,989 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:19:11,990 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:19:11,992 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:19:11,992 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:19:11,992 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:19:11,993 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:19:11,994 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:19:11,995 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:19:11,998 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:19:12,003 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:19:12,003 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:19:12,004 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:19:12,004 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:19:12,004 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:19:12,005 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:19:12,006 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:19:12,006 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 15:19:12,018 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:19:12,019 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:19:12,019 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:19:12,019 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:19:12,020 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:19:12,020 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:19:12,021 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:19:12,021 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:19:12,021 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:19:12,021 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:19:12,021 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:19:12,022 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:19:12,022 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:19:12,022 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:19:12,022 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:19:12,022 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:19:12,023 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:19:12,023 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:19:12,023 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:19:12,025 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:19:12,025 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:19:12,065 INFO ]: Repository-Root is: /tmp [2018-06-22 15:19:12,077 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:19:12,081 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:19:12,082 INFO ]: Initializing SmtParser... [2018-06-22 15:19:12,083 INFO ]: SmtParser initialized [2018-06-22 15:19:12,083 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 [2018-06-22 15:19:12,084 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 15:19:12,174 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 unknown [2018-06-22 15:19:12,467 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nest-if1.c.smt2 [2018-06-22 15:19:12,472 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:19:12,478 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:19:12,478 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:19:12,478 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:19:12,478 INFO ]: ChcToBoogie initialized [2018-06-22 15:19:12,481 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,528 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12 Unit [2018-06-22 15:19:12,528 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:19:12,528 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:19:12,528 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:19:12,528 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:19:12,549 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,549 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,557 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,558 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,572 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,574 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,575 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (1/1) ... [2018-06-22 15:19:12,577 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:19:12,577 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:19:12,577 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:19:12,577 INFO ]: RCFGBuilder initialized [2018-06-22 15:19:12,578 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (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 15:19:12,599 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:19:12,599 INFO ]: Found specification of procedure False [2018-06-22 15:19:12,600 INFO ]: Found implementation of procedure False [2018-06-22 15:19:12,600 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:19:12,600 INFO ]: Found specification of procedure state [2018-06-22 15:19:12,600 INFO ]: Found implementation of procedure state [2018-06-22 15:19:12,600 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:19:12,600 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:19:12,600 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 15:19:12,758 INFO ]: Using library mode [2018-06-22 15:19:12,758 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:19:12 BoogieIcfgContainer [2018-06-22 15:19:12,758 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:19:12,760 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:19:12,760 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:19:12,763 INFO ]: TraceAbstraction initialized [2018-06-22 15:19:12,764 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:19:12" (1/3) ... [2018-06-22 15:19:12,764 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abae9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:19:12, skipping insertion in model container [2018-06-22 15:19:12,765 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:19:12" (2/3) ... [2018-06-22 15:19:12,765 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abae9bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:19:12, skipping insertion in model container [2018-06-22 15:19:12,765 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:19:12" (3/3) ... [2018-06-22 15:19:12,767 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:19:12,774 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:19:12,780 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:19:12,815 INFO ]: Using default assertion order modulation [2018-06-22 15:19:12,816 INFO ]: Interprodecural is true [2018-06-22 15:19:12,816 INFO ]: Hoare is false [2018-06-22 15:19:12,816 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:19:12,816 INFO ]: Backedges is TWOTRACK [2018-06-22 15:19:12,816 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:19:12,816 INFO ]: Difference is false [2018-06-22 15:19:12,816 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:19:12,816 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:19:12,831 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:19:12,841 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:19:12,841 INFO ]: Found error trace [2018-06-22 15:19:12,843 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:12,843 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:12,848 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:19:12,850 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:12,851 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:12,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:12,884 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:19:12,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:12,908 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:12,971 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:19:12,974 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:19:12,974 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:19:12,976 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:19:12,999 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:19:13,000 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:19:13,002 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:19:13,123 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:19:13,123 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:19:13,124 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:19:13,125 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:19:13,126 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:19:13,135 INFO ]: With dead ends: 13 [2018-06-22 15:19:13,135 INFO ]: Without dead ends: 13 [2018-06-22 15:19:13,136 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 15:19:13,149 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:19:13,178 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:19:13,179 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:19:13,180 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:19:13,181 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:19:13,181 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:19:13,181 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:19:13,181 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:19:13,182 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:19:13,183 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:19:13,183 INFO ]: Found error trace [2018-06-22 15:19:13,183 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:13,183 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:13,183 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:19:13,183 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:13,183 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:13,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:13,184 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:19:13,184 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:13,230 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:13,477 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:19:13,477 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:19:13,477 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 15:19:13,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:19:13,515 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:13,525 INFO ]: Computing forward predicates... [2018-06-22 15:19:13,825 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:19:13,846 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:19:13,846 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:19:13,847 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:19:13,847 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:19:13,847 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:19:13,847 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:19:14,049 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:19:14,049 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:19:14,050 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:19:14,051 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:19:14,051 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:19:14,051 INFO ]: With dead ends: 15 [2018-06-22 15:19:14,051 INFO ]: Without dead ends: 15 [2018-06-22 15:19:14,052 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 15:19:14,052 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:19:14,058 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:19:14,058 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:19:14,058 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:19:14,058 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:19:14,059 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:19:14,059 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:19:14,059 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:19:14,059 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:19:14,059 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:19:14,059 INFO ]: Found error trace [2018-06-22 15:19:14,059 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:14,059 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:14,060 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:19:14,060 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:14,060 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:14,060 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:14,060 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:19:14,061 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:14,116 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:14,394 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 9 [2018-06-22 15:19:14,734 WARN ]: Spent 321.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2018-06-22 15:19:14,778 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:19:14,778 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:19:14,778 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 15:19:14,790 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:19:14,837 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:19:14,837 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:14,840 INFO ]: Computing forward predicates... [2018-06-22 15:19:15,170 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:19:15,200 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:19:15,201 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:19:15,201 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:19:15,201 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:19:15,201 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:19:15,201 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:19:15,395 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 15:19:15,794 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:19:15,794 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:19:15,795 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:19:15,795 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:19:15,795 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:19:15,795 INFO ]: With dead ends: 17 [2018-06-22 15:19:15,795 INFO ]: Without dead ends: 17 [2018-06-22 15:19:15,796 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:19:15,796 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:19:15,799 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:19:15,799 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:19:15,799 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:19:15,799 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:19:15,800 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:19:15,800 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:19:15,800 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:19:15,800 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:19:15,800 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:19:15,801 INFO ]: Found error trace [2018-06-22 15:19:15,801 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:15,801 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:15,801 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:19:15,801 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:15,801 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:15,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:15,802 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:19:15,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:15,837 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:16,243 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:19:16,243 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:19:16,243 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 15:19:16,260 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:19:16,296 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:19:16,296 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:16,301 INFO ]: Computing forward predicates... [2018-06-22 15:19:17,174 WARN ]: Spent 534.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 22 [2018-06-22 15:19:17,645 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:19:17,677 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:19:17,677 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:19:17,677 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:19:17,678 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:19:17,678 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:19:17,678 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:19:17,841 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2018-06-22 15:19:18,140 WARN ]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2018-06-22 15:19:18,321 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2018-06-22 15:19:18,338 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:19:18,338 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:19:18,339 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:19:18,339 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:19:18,339 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:19:18,340 INFO ]: With dead ends: 19 [2018-06-22 15:19:18,340 INFO ]: Without dead ends: 19 [2018-06-22 15:19:18,340 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:19:18,340 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:19:18,343 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:19:18,343 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:19:18,343 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:19:18,343 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:19:18,344 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:19:18,344 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:19:18,344 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:19:18,344 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:19:18,344 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:19:18,344 INFO ]: Found error trace [2018-06-22 15:19:18,344 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:18,345 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:18,345 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:19:18,345 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:18,345 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:18,346 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:18,346 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:19:18,346 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:18,382 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:18,767 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:19:18,767 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:19:18,767 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 15:19:18,775 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:19:18,824 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:19:18,824 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:18,828 INFO ]: Computing forward predicates... [2018-06-22 15:19:19,130 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22 [2018-06-22 15:19:19,253 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:19:19,272 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:19:19,272 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-06-22 15:19:19,273 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:19:19,273 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:19:19,273 INFO ]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:19:19,273 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 13 states. [2018-06-22 15:19:19,431 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2018-06-22 15:19:19,748 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 28 [2018-06-22 15:19:19,879 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:19:19,879 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:19:19,880 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:19:19,880 INFO ]: Start accepts. Automaton has 13 states. Word has length 25 [2018-06-22 15:19:19,880 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:19:19,880 INFO ]: With dead ends: 21 [2018-06-22 15:19:19,880 INFO ]: Without dead ends: 21 [2018-06-22 15:19:19,881 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:19:19,881 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:19:19,884 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:19:19,884 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:19:19,885 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:19:19,885 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:19:19,885 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:19:19,885 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:19:19,885 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:19:19,885 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:19:19,886 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:19:19,886 INFO ]: Found error trace [2018-06-22 15:19:19,886 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:19:19,886 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:19:19,886 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:19:19,886 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:19:19,886 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:19:19,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:19,887 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:19:19,887 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:19:19,982 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:20,651 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:19:20,651 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:19:20,651 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 15:19:20,657 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:19:20,709 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:19:20,709 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:19:20,714 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:20:26,475 WARN ]: Removed 8 from assertion stack [2018-06-22 15:20:26,475 INFO ]: Timeout while computing interpolants [2018-06-22 15:20:26,675 WARN ]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:20:26,676 WARN ]: Verification canceled [2018-06-22 15:20:26,680 WARN ]: Timeout [2018-06-22 15:20:26,680 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:20:26 BoogieIcfgContainer [2018-06-22 15:20:26,680 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:20:26,681 INFO ]: Toolchain (without parser) took 74208.60 ms. Allocated memory was 303.6 MB in the beginning and 966.3 MB in the end (delta: 662.7 MB). Free memory was 254.0 MB in the beginning and 629.6 MB in the end (delta: -375.6 MB). Peak memory consumption was 822.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:20:26,682 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.6 MB. Free memory is still 266.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:20:26,682 INFO ]: ChcToBoogie took 49.67 ms. Allocated memory is still 303.6 MB. Free memory was 254.0 MB in the beginning and 252.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:20:26,683 INFO ]: Boogie Preprocessor took 48.50 ms. Allocated memory is still 303.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:20:26,683 INFO ]: RCFGBuilder took 181.17 ms. Allocated memory is still 303.6 MB. Free memory was 250.0 MB in the beginning and 240.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:20:26,684 INFO ]: TraceAbstraction took 73920.21 ms. Allocated memory was 303.6 MB in the beginning and 966.3 MB in the end (delta: 662.7 MB). Free memory was 240.0 MB in the beginning and 629.6 MB in the end (delta: -389.6 MB). Peak memory consumption was 808.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:20:26,690 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 303.6 MB. Free memory is still 266.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 49.67 ms. Allocated memory is still 303.6 MB. Free memory was 254.0 MB in the beginning and 252.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 48.50 ms. Allocated memory is still 303.6 MB. Free memory was 252.0 MB in the beginning and 250.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 181.17 ms. Allocated memory is still 303.6 MB. Free memory was 250.0 MB in the beginning and 240.0 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 73920.21 ms. Allocated memory was 303.6 MB in the beginning and 966.3 MB in the end (delta: 662.7 MB). Free memory was 240.0 MB in the beginning and 629.6 MB in the end (delta: -389.6 MB). Peak memory consumption was 808.0 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 30 with TraceHistMax 6, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 4513. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 73.8s OverallTime, 6 OverallIterations, 6 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 58 SDslu, 163 SDs, 0 SdLazy, 134 SolverSat, 66 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=5, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 22084 SizeOfPredicates, 150 NumberOfNonLiveVariables, 580 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 40/140 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-20-26-707.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nest-if1.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-20-26-707.csv Completed graceful shutdown