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/cav12/toy.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:36:37,980 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:36:37,982 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:36:37,994 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:36:37,994 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:36:37,995 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:36:37,997 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:36:38,000 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:36:38,002 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:36:38,003 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:36:38,004 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:36:38,004 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:36:38,005 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:36:38,006 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:36:38,007 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:36:38,008 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:36:38,010 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:36:38,012 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:36:38,013 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:36:38,015 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:36:38,016 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:36:38,019 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:36:38,019 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:36:38,019 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:36:38,020 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:36:38,021 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:36:38,022 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:36:38,023 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:36:38,024 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:36:38,024 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:36:38,025 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:36:38,026 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:36:38,026 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:36:38,027 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:36:38,028 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:36:38,028 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 14:36:38,042 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:36:38,043 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:36:38,043 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:36:38,044 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:36:38,045 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:36:38,045 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:36:38,045 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:36:38,045 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:36:38,046 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:36:38,046 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:36:38,046 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:36:38,046 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:36:38,046 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:36:38,047 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:36:38,049 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:36:38,049 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:36:38,105 INFO ]: Repository-Root is: /tmp [2018-06-22 14:36:38,122 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:36:38,129 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:36:38,130 INFO ]: Initializing SmtParser... [2018-06-22 14:36:38,130 INFO ]: SmtParser initialized [2018-06-22 14:36:38,131 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/toy.smt2 [2018-06-22 14:36:38,133 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 14:36:38,226 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/toy.smt2 unknown [2018-06-22 14:36:38,750 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/toy.smt2 [2018-06-22 14:36:38,760 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:36:38,768 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:36:38,769 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:36:38,769 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:36:38,769 INFO ]: ChcToBoogie initialized [2018-06-22 14:36:38,773 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,838 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38 Unit [2018-06-22 14:36:38,839 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:36:38,839 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:36:38,839 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:36:38,839 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:36:38,871 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,880 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,903 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,903 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,941 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,942 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,946 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (1/1) ... [2018-06-22 14:36:38,950 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:36:38,951 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:36:38,951 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:36:38,951 INFO ]: RCFGBuilder initialized [2018-06-22 14:36:38,952 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:36:38,977 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:36:38,977 INFO ]: Found specification of procedure False [2018-06-22 14:36:38,978 INFO ]: Found implementation of procedure False [2018-06-22 14:36:38,978 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:36:38,978 INFO ]: Found specification of procedure state [2018-06-22 14:36:38,978 INFO ]: Found implementation of procedure state [2018-06-22 14:36:38,978 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:36:38,978 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:36:38,978 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 14:36:39,399 INFO ]: Using library mode [2018-06-22 14:36:39,399 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:36:39 BoogieIcfgContainer [2018-06-22 14:36:39,400 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:36:39,405 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:36:39,405 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:36:39,408 INFO ]: TraceAbstraction initialized [2018-06-22 14:36:39,409 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:36:38" (1/3) ... [2018-06-22 14:36:39,410 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d23ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:36:39, skipping insertion in model container [2018-06-22 14:36:39,414 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:36:38" (2/3) ... [2018-06-22 14:36:39,415 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72d23ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:36:39, skipping insertion in model container [2018-06-22 14:36:39,415 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:36:39" (3/3) ... [2018-06-22 14:36:39,421 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:36:39,431 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:36:39,439 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:36:39,481 INFO ]: Using default assertion order modulation [2018-06-22 14:36:39,482 INFO ]: Interprodecural is true [2018-06-22 14:36:39,482 INFO ]: Hoare is false [2018-06-22 14:36:39,482 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:36:39,482 INFO ]: Backedges is TWOTRACK [2018-06-22 14:36:39,482 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:36:39,482 INFO ]: Difference is false [2018-06-22 14:36:39,482 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:36:39,482 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:36:39,497 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:36:39,508 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:36:39,508 INFO ]: Found error trace [2018-06-22 14:36:39,509 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:36:39,509 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:36:39,515 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:36:39,517 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:36:39,517 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:36:39,552 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:39,552 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:36:39,552 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:39,594 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:39,687 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:36:39,690 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:36:39,690 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:36:39,692 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:36:39,705 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:36:39,706 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:36:39,708 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:36:39,828 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:36:39,828 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:36:39,828 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:36:39,830 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:36:39,830 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:36:39,842 INFO ]: With dead ends: 13 [2018-06-22 14:36:39,842 INFO ]: Without dead ends: 13 [2018-06-22 14:36:39,844 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 14:36:39,863 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:36:39,891 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:36:39,893 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:36:39,894 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:36:39,895 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:36:39,895 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:36:39,895 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:36:39,895 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:36:39,895 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:36:39,897 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:36:39,897 INFO ]: Found error trace [2018-06-22 14:36:39,897 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:36:39,898 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:36:39,898 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:36:39,898 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:36:39,898 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:36:39,899 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:39,899 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:36:39,899 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:40,087 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:40,487 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:36:40,488 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:36:40,488 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) [2018-06-22 14:36:40,508 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:36:40,593 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:40,608 INFO ]: Computing forward predicates... [2018-06-22 14:36:42,288 WARN ]: Spent 854.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 15 [2018-06-22 14:36:42,458 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:36:42,489 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:36:42,489 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:36:42,489 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:36:42,490 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:36:42,490 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:36:42,490 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:36:43,062 WARN ]: Spent 151.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-06-22 14:36:43,096 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:36:43,096 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:36:43,097 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:36:43,097 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:36:43,097 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:36:43,098 INFO ]: With dead ends: 15 [2018-06-22 14:36:43,098 INFO ]: Without dead ends: 15 [2018-06-22 14:36:43,099 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:36:43,099 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:36:43,102 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:36:43,102 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:36:43,103 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:36:43,103 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:36:43,103 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:36:43,103 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:36:43,103 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:36:43,103 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:36:43,103 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:36:43,103 INFO ]: Found error trace [2018-06-22 14:36:43,103 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:36:43,104 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:36:43,104 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:36:43,104 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:36:43,104 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:36:43,105 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:43,105 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:36:43,105 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:43,246 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:43,544 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:36:43,544 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:36:43,544 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 14:36:43,554 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:36:43,632 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:36:43,633 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:43,641 INFO ]: Computing forward predicates... [2018-06-22 14:36:45,977 WARN ]: Spent 1.31 s on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2018-06-22 14:36:46,033 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:36:46,054 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:36:46,054 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:36:46,054 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:36:46,054 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:36:46,055 INFO ]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:36:46,055 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:36:46,263 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2018-06-22 14:36:46,558 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2018-06-22 14:36:46,623 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:36:46,623 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:36:46,623 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:36:46,623 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:36:46,623 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:36:46,624 INFO ]: With dead ends: 17 [2018-06-22 14:36:46,624 INFO ]: Without dead ends: 17 [2018-06-22 14:36:46,624 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:36:46,637 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:36:46,640 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:36:46,640 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:36:46,640 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:36:46,640 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:36:46,641 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:36:46,641 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:36:46,641 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:36:46,641 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:36:46,641 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:36:46,641 INFO ]: Found error trace [2018-06-22 14:36:46,641 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:36:46,641 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:36:46,641 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:36:46,641 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:36:46,641 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:36:46,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:46,642 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:36:46,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:46,748 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:47,086 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:36:47,086 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:36:47,086 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) [2018-06-22 14:36:47,101 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:36:47,183 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:36:47,184 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:47,193 INFO ]: Computing forward predicates... [2018-06-22 14:36:47,696 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 12 [2018-06-22 14:36:48,788 WARN ]: Spent 386.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2018-06-22 14:36:48,840 INFO ]: Checked inductivity of 21 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:36:48,865 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:36:48,865 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:36:48,865 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:36:48,866 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:36:48,866 INFO ]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:36:48,866 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:36:49,203 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 38 [2018-06-22 14:36:49,562 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2018-06-22 14:36:49,780 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2018-06-22 14:36:49,813 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:36:49,813 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:36:49,814 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:36:49,814 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:36:49,814 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:36:49,814 INFO ]: With dead ends: 19 [2018-06-22 14:36:49,814 INFO ]: Without dead ends: 19 [2018-06-22 14:36:49,815 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2018-06-22 14:36:49,815 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:36:49,818 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:36:49,818 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:36:49,819 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:36:49,819 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:36:49,820 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:36:49,820 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:36:49,820 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:36:49,820 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:36:49,821 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:36:49,821 INFO ]: Found error trace [2018-06-22 14:36:49,821 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:36:49,821 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:36:49,821 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:36:49,821 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:36:49,821 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:36:49,822 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:49,822 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:36:49,822 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:36:49,956 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:50,421 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:36:50,655 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:36:50,655 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:36:50,655 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 14:36:50,662 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:36:55,040 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:36:55,040 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:36:55,055 INFO ]: Computing forward predicates... [2018-06-22 14:36:55,366 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 Received shutdown request... [2018-06-22 14:37:48,806 INFO ]: Timeout while computing interpolants [2018-06-22 14:37:49,006 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:37:49,007 WARN ]: Verification canceled [2018-06-22 14:37:49,011 WARN ]: Timeout [2018-06-22 14:37:49,012 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:37:49 BoogieIcfgContainer [2018-06-22 14:37:49,012 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:37:49,013 INFO ]: Toolchain (without parser) took 70252.36 ms. Allocated memory was 297.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 230.4 MB in the beginning and 570.1 MB in the end (delta: -339.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:37:49,014 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 297.8 MB. Free memory is still 262.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:37:49,015 INFO ]: ChcToBoogie took 69.87 ms. Allocated memory is still 297.8 MB. Free memory was 230.4 MB in the beginning and 228.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:37:49,015 INFO ]: Boogie Preprocessor took 110.70 ms. Allocated memory is still 297.8 MB. Free memory was 228.3 MB in the beginning and 226.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:37:49,016 INFO ]: RCFGBuilder took 449.01 ms. Allocated memory is still 297.8 MB. Free memory was 226.3 MB in the beginning and 202.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:37:49,016 INFO ]: TraceAbstraction took 69606.44 ms. Allocated memory was 297.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 202.4 MB in the beginning and 570.1 MB in the end (delta: -367.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 14:37:49,020 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 297.8 MB. Free memory is still 262.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.87 ms. Allocated memory is still 297.8 MB. Free memory was 230.4 MB in the beginning and 228.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 110.70 ms. Allocated memory is still 297.8 MB. Free memory was 228.3 MB in the beginning and 226.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 449.01 ms. Allocated memory is still 297.8 MB. Free memory was 226.3 MB in the beginning and 202.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69606.44 ms. Allocated memory was 297.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 202.4 MB in the beginning and 570.1 MB in the end (delta: -367.7 MB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 4400 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 69.5s OverallTime, 5 OverallIterations, 5 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 44 SDtfs, 48 SDslu, 127 SDs, 0 SdLazy, 88 SolverSat, 61 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=4, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 13476 SizeOfPredicates, 498 NumberOfNonLiveVariables, 645 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 22/68 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/toy.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-37-49-042.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/toy.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-37-49-042.csv Completed graceful shutdown