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/ex2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:02:38,414 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:02:38,417 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:02:38,429 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:02:38,429 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:02:38,430 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:02:38,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:02:38,437 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:02:38,438 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:02:38,440 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:02:38,441 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:02:38,441 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:02:38,442 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:02:38,443 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:02:38,448 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:02:38,449 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:02:38,462 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:02:38,464 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:02:38,466 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:02:38,467 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:02:38,468 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:02:38,470 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:02:38,470 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:02:38,470 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:02:38,475 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:02:38,476 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:02:38,477 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:02:38,477 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:02:38,479 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:02:38,479 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:02:38,480 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:02:38,480 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:02:38,481 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:02:38,481 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:02:38,487 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:02:38,487 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 15:02:38,508 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:02:38,508 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:02:38,508 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:02:38,509 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:02:38,511 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:02:38,511 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:02:38,511 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:02:38,511 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:02:38,512 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:02:38,512 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:02:38,512 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:02:38,512 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:02:38,512 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:02:38,513 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:02:38,518 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:02:38,518 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:02:38,564 INFO ]: Repository-Root is: /tmp [2018-06-22 15:02:38,578 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:02:38,583 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:02:38,585 INFO ]: Initializing SmtParser... [2018-06-22 15:02:38,585 INFO ]: SmtParser initialized [2018-06-22 15:02:38,586 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex2.c.smt2 [2018-06-22 15:02:38,587 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 15:02:38,676 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex2.c.smt2 unknown [2018-06-22 15:02:38,967 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/ex2.c.smt2 [2018-06-22 15:02:38,972 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:02:38,978 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:02:38,978 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:02:38,978 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:02:38,979 INFO ]: ChcToBoogie initialized [2018-06-22 15:02:38,982 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:02:38" (1/1) ... [2018-06-22 15:02:39,034 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39 Unit [2018-06-22 15:02:39,034 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:02:39,035 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:02:39,035 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:02:39,035 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:02:39,056 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,056 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,075 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,075 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,081 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,095 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,097 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (1/1) ... [2018-06-22 15:02:39,100 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:02:39,100 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:02:39,100 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:02:39,100 INFO ]: RCFGBuilder initialized [2018-06-22 15:02:39,101 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (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 15:02:39,128 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:02:39,128 INFO ]: Found specification of procedure False [2018-06-22 15:02:39,128 INFO ]: Found implementation of procedure False [2018-06-22 15:02:39,128 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:02:39,128 INFO ]: Found specification of procedure state [2018-06-22 15:02:39,128 INFO ]: Found implementation of procedure state [2018-06-22 15:02:39,128 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:02:39,128 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:02:39,128 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 15:02:39,369 INFO ]: Using library mode [2018-06-22 15:02:39,369 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:02:39 BoogieIcfgContainer [2018-06-22 15:02:39,369 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:02:39,371 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:02:39,371 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:02:39,382 INFO ]: TraceAbstraction initialized [2018-06-22 15:02:39,383 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:02:38" (1/3) ... [2018-06-22 15:02:39,384 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a17e476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:02:39, skipping insertion in model container [2018-06-22 15:02:39,384 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:02:39" (2/3) ... [2018-06-22 15:02:39,384 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a17e476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:02:39, skipping insertion in model container [2018-06-22 15:02:39,384 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:02:39" (3/3) ... [2018-06-22 15:02:39,386 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:02:39,404 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:02:39,411 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:02:39,461 INFO ]: Using default assertion order modulation [2018-06-22 15:02:39,461 INFO ]: Interprodecural is true [2018-06-22 15:02:39,461 INFO ]: Hoare is false [2018-06-22 15:02:39,461 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:02:39,461 INFO ]: Backedges is TWOTRACK [2018-06-22 15:02:39,461 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:02:39,461 INFO ]: Difference is false [2018-06-22 15:02:39,461 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:02:39,461 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:02:39,481 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:02:39,493 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:02:39,493 INFO ]: Found error trace [2018-06-22 15:02:39,494 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:39,494 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:39,500 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:02:39,502 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:39,503 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:39,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:39,551 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:02:39,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:39,582 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:39,691 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:02:39,693 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:02:39,694 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:02:39,696 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:02:39,707 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:02:39,707 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:02:39,709 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:02:39,777 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:39,777 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:02:39,778 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:02:39,779 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:02:39,779 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:39,796 INFO ]: With dead ends: 13 [2018-06-22 15:02:39,796 INFO ]: Without dead ends: 13 [2018-06-22 15:02:39,798 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 15:02:39,816 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:02:39,844 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:02:39,845 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:02:39,845 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:02:39,846 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:02:39,846 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:39,846 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:02:39,846 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:02:39,847 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:02:39,848 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:02:39,848 INFO ]: Found error trace [2018-06-22 15:02:39,848 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:39,848 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:39,848 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:02:39,848 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:39,848 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:39,849 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:39,849 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:02:39,849 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:39,916 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:40,192 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:02:40,192 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:40,192 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 15:02:40,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:02:40,260 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:40,269 INFO ]: Computing forward predicates... [2018-06-22 15:02:40,678 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:02:40,711 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:02:40,711 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:02:40,711 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:02:40,711 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:02:40,712 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:02:40,712 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:02:40,875 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:40,875 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:02:40,876 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:02:40,876 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:02:40,876 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:40,877 INFO ]: With dead ends: 15 [2018-06-22 15:02:40,877 INFO ]: Without dead ends: 15 [2018-06-22 15:02:40,877 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 15:02:40,878 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:02:40,881 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:02:40,881 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:02:40,881 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:02:40,881 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:02:40,882 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:40,882 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:02:40,882 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:02:40,882 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:02:40,882 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:02:40,882 INFO ]: Found error trace [2018-06-22 15:02:40,882 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:40,882 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:40,883 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:02:40,883 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:40,883 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:40,883 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:40,883 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:02:40,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:40,939 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:41,280 WARN ]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 15:02:41,659 WARN ]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 15:02:41,725 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:02:41,725 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:41,725 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 15:02:41,742 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:02:41,796 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:02:41,796 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:41,800 INFO ]: Computing forward predicates... [2018-06-22 15:02:41,949 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:02:41,976 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:02:41,976 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 15:02:41,976 INFO ]: Interpolant automaton has 9 states [2018-06-22 15:02:41,976 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 15:02:41,976 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 15:02:41,977 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 9 states. [2018-06-22 15:02:42,353 WARN ]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2018-06-22 15:02:42,494 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:42,494 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:02:42,495 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:02:42,495 INFO ]: Start accepts. Automaton has 9 states. Word has length 17 [2018-06-22 15:02:42,495 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:42,495 INFO ]: With dead ends: 17 [2018-06-22 15:02:42,496 INFO ]: Without dead ends: 17 [2018-06-22 15:02:42,496 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:02:42,496 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:02:42,499 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:02:42,499 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:02:42,500 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:02:42,500 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:02:42,500 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:42,500 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:02:42,500 INFO ]: Interpolant automaton has 9 states. [2018-06-22 15:02:42,500 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:02:42,501 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:02:42,501 INFO ]: Found error trace [2018-06-22 15:02:42,501 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:42,501 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:42,501 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:02:42,501 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:42,501 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:42,502 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:42,502 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:02:42,502 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:42,546 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:42,933 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:02:42,933 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:42,933 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 15:02:42,950 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 15:02:43,046 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:02:43,046 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:43,050 INFO ]: Computing forward predicates... [2018-06-22 15:02:43,292 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2018-06-22 15:02:43,644 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:02:43,664 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:02:43,664 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 15:02:43,665 INFO ]: Interpolant automaton has 13 states [2018-06-22 15:02:43,665 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 15:02:43,665 INFO ]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2018-06-22 15:02:43,665 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-22 15:02:43,944 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 41 [2018-06-22 15:02:44,188 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-06-22 15:02:44,324 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:44,324 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:02:44,324 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:02:44,324 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-22 15:02:44,325 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:44,325 INFO ]: With dead ends: 19 [2018-06-22 15:02:44,325 INFO ]: Without dead ends: 19 [2018-06-22 15:02:44,326 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:02:44,326 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:02:44,328 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:02:44,328 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:02:44,329 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:02:44,329 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:02:44,329 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:44,329 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:02:44,329 INFO ]: Interpolant automaton has 13 states. [2018-06-22 15:02:44,329 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:02:44,330 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:02:44,330 INFO ]: Found error trace [2018-06-22 15:02:44,330 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:44,330 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:44,330 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:02:44,330 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:44,330 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:44,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:44,331 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:02:44,331 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:44,374 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:45,125 WARN ]: Spent 543.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 15:02:45,345 WARN ]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2018-06-22 15:02:45,607 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:02:45,607 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:45,607 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 15:02:45,614 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:02:45,659 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:02:45,659 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:45,663 INFO ]: Computing forward predicates... [2018-06-22 15:02:45,835 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2018-06-22 15:02:46,095 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:02:46,114 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:02:46,114 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:02:46,114 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:02:46,114 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:02:46,114 INFO ]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:02:46,115 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:02:46,487 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2018-06-22 15:02:46,712 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2018-06-22 15:02:46,878 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2018-06-22 15:02:47,067 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2018-06-22 15:02:47,086 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:47,086 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:02:47,088 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:02:47,088 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:02:47,088 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:47,089 INFO ]: With dead ends: 21 [2018-06-22 15:02:47,089 INFO ]: Without dead ends: 21 [2018-06-22 15:02:47,089 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:02:47,089 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:02:47,092 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:02:47,092 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:02:47,096 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:02:47,096 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:02:47,096 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:47,096 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:02:47,096 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:02:47,096 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:02:47,097 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:02:47,097 INFO ]: Found error trace [2018-06-22 15:02:47,097 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:47,097 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:47,097 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:02:47,097 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:47,097 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:47,098 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:47,098 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:02:47,098 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:47,142 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:47,699 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2018-06-22 15:02:47,910 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:02:47,910 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:47,910 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 15:02:47,917 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:02:47,987 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:02:47,987 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:47,992 INFO ]: Computing forward predicates... [2018-06-22 15:02:49,093 WARN ]: Spent 841.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 39 [2018-06-22 15:02:50,996 WARN ]: Spent 1.54 s on a formula simplification. DAG size of input: 101 DAG size of output: 40 [2018-06-22 15:02:51,895 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:02:51,915 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:02:51,915 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2018-06-22 15:02:51,915 INFO ]: Interpolant automaton has 18 states [2018-06-22 15:02:51,915 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 15:02:51,915 INFO ]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2018-06-22 15:02:51,915 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states. [2018-06-22 15:02:52,471 WARN ]: Spent 513.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 70 [2018-06-22 15:02:52,649 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 29 [2018-06-22 15:02:52,874 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2018-06-22 15:02:53,133 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 43 [2018-06-22 15:02:53,425 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 44 [2018-06-22 15:02:53,747 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2018-06-22 15:02:53,776 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:02:53,776 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:02:53,777 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:02:53,777 INFO ]: Start accepts. Automaton has 18 states. Word has length 29 [2018-06-22 15:02:53,777 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:02:53,778 INFO ]: With dead ends: 23 [2018-06-22 15:02:53,778 INFO ]: Without dead ends: 23 [2018-06-22 15:02:53,778 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2018-06-22 15:02:53,778 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:02:53,783 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:02:53,783 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:02:53,783 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:02:53,783 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:02:53,784 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:02:53,784 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:02:53,784 INFO ]: Interpolant automaton has 18 states. [2018-06-22 15:02:53,784 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:02:53,785 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:02:53,785 INFO ]: Found error trace [2018-06-22 15:02:53,785 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:02:53,785 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:02:53,785 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:02:53,785 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:02:53,785 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:02:53,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:53,786 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:02:53,786 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:02:53,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:54,651 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:02:54,651 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:02:54,651 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 15:02:54,657 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:02:54,817 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:02:54,817 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:02:54,825 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 15:03:48,490 WARN ]: Removed 5 from assertion stack [2018-06-22 15:03:48,491 INFO ]: Timeout while computing interpolants [2018-06-22 15:03:48,691 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:03:48,691 WARN ]: Verification canceled [2018-06-22 15:03:48,696 WARN ]: Timeout [2018-06-22 15:03:48,697 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:03:48 BoogieIcfgContainer [2018-06-22 15:03:48,697 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:03:48,698 INFO ]: Toolchain (without parser) took 69725.09 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 254.0 MB in the beginning and 192.5 MB in the end (delta: 61.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 15:03:48,698 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:03:48,699 INFO ]: ChcToBoogie took 56.45 ms. Allocated memory is still 304.6 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 15:03:48,699 INFO ]: Boogie Preprocessor took 64.63 ms. Allocated memory is still 304.6 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 15:03:48,701 INFO ]: RCFGBuilder took 269.06 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 238.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:03:48,702 INFO ]: TraceAbstraction took 69326.25 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 238.1 MB in the beginning and 192.5 MB in the end (delta: 45.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 15:03:48,705 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 304.6 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 56.45 ms. Allocated memory is still 304.6 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 64.63 ms. Allocated memory is still 304.6 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 269.06 ms. Allocated memory is still 304.6 MB. Free memory was 250.0 MB in the beginning and 238.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69326.25 ms. Allocated memory was 304.6 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 238.1 MB in the beginning and 192.5 MB in the end (delta: 45.5 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 34 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 32802. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 69.2s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 4.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 72 SDtfs, 93 SDslu, 291 SDs, 0 SdLazy, 240 SolverSat, 123 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 10.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.0s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 0 QuantifiedInterpolants, 59700 SizeOfPredicates, 152 NumberOfNonLiveVariables, 1270 ConjunctsInSsa, 173 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 70/250 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/ex2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-03-48-723.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/ex2.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-03-48-723.csv Completed graceful shutdown