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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:52:08,463 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:52:08,496 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:52:08,510 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:52:08,510 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:52:08,511 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:52:08,512 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:52:08,517 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:52:08,519 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:52:08,520 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:52:08,521 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:52:08,521 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:52:08,522 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:52:08,526 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:52:08,527 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:52:08,528 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:52:08,540 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:52:08,542 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:52:08,544 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:52:08,545 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:52:08,546 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:52:08,554 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:52:08,554 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:52:08,555 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:52:08,556 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:52:08,556 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:52:08,557 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:52:08,560 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:52:08,561 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:52:08,561 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:52:08,562 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:52:08,562 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:52:08,563 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:52:08,571 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:52:08,571 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:52:08,572 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:52:08,590 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:52:08,590 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:52:08,591 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:52:08,591 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:52:08,592 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:52:08,593 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:52:08,593 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:52:08,593 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:52:08,593 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:52:08,593 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:52:08,594 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:52:08,594 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:52:08,594 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:52:08,594 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:52:08,594 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:52:08,595 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:52:08,595 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:52:08,596 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:52:08,597 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:52:08,662 INFO ]: Repository-Root is: /tmp [2018-06-22 05:52:08,707 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:52:08,712 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:52:08,714 INFO ]: Initializing SmtParser... [2018-06-22 05:52:08,714 INFO ]: SmtParser initialized [2018-06-22 05:52:08,715 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-22 05:52:08,745 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 05:52:09,051 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 unknown [2018-06-22 05:52:09,483 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq2.c.smt2 [2018-06-22 05:52:09,492 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:52:09,499 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:52:09,499 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:52:09,499 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:52:09,500 INFO ]: ChcToBoogie initialized [2018-06-22 05:52:09,519 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,617 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09 Unit [2018-06-22 05:52:09,617 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:52:09,618 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:52:09,618 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:52:09,618 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:52:09,686 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,686 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,703 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,703 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,708 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,709 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,711 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (1/1) ... [2018-06-22 05:52:09,718 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:52:09,718 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:52:09,718 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:52:09,718 INFO ]: RCFGBuilder initialized [2018-06-22 05:52:09,719 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (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 05:52:09,809 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:52:09,810 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:52:09,810 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:52:09,810 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:52:09,810 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:52:09,810 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:52:10,358 INFO ]: Using library mode [2018-06-22 05:52:10,358 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:52:10 BoogieIcfgContainer [2018-06-22 05:52:10,358 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:52:10,360 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:52:10,360 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:52:10,393 INFO ]: TraceAbstraction initialized [2018-06-22 05:52:10,394 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:52:09" (1/3) ... [2018-06-22 05:52:10,394 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc83a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:52:10, skipping insertion in model container [2018-06-22 05:52:10,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:52:09" (2/3) ... [2018-06-22 05:52:10,395 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc83a9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:52:10, skipping insertion in model container [2018-06-22 05:52:10,395 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:52:10" (3/3) ... [2018-06-22 05:52:10,396 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:52:10,429 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:52:10,454 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:52:10,665 INFO ]: Using default assertion order modulation [2018-06-22 05:52:10,665 INFO ]: Interprodecural is true [2018-06-22 05:52:10,665 INFO ]: Hoare is false [2018-06-22 05:52:10,665 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:52:10,665 INFO ]: Backedges is TWOTRACK [2018-06-22 05:52:10,665 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:52:10,666 INFO ]: Difference is false [2018-06-22 05:52:10,666 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:52:10,666 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:52:10,895 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:52:10,988 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:52:10,988 INFO ]: Found error trace [2018-06-22 05:52:11,009 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:11,009 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:11,052 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:52:11,073 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:11,074 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:11,243 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:11,243 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:52:11,243 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:11,363 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:11,457 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:11,460 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:52:11,460 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:52:11,462 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:52:11,484 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:52:11,485 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:52:11,515 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:52:11,655 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:11,655 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:52:11,656 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:52:11,662 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:52:11,663 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:11,680 INFO ]: With dead ends: 9 [2018-06-22 05:52:11,680 INFO ]: Without dead ends: 9 [2018-06-22 05:52:11,703 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:52:11,807 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:52:11,826 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:52:11,827 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:52:11,828 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:52:11,829 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:52:11,829 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:11,829 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:52:11,829 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:52:11,829 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:52:11,829 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:52:11,829 INFO ]: Found error trace [2018-06-22 05:52:11,829 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:11,829 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:11,830 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:52:11,830 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:11,830 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:11,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:11,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:52:11,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:11,905 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:12,150 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:12,150 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:12,150 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 05:52:12,169 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:52:12,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:12,255 INFO ]: Computing forward predicates... [2018-06-22 05:52:12,604 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:12,642 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:52:12,642 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 05:52:12,642 INFO ]: Interpolant automaton has 4 states [2018-06-22 05:52:12,642 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 05:52:12,643 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 05:52:12,643 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-22 05:52:12,752 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:12,753 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:52:12,753 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:52:12,754 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-22 05:52:12,754 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:12,754 INFO ]: With dead ends: 10 [2018-06-22 05:52:12,754 INFO ]: Without dead ends: 10 [2018-06-22 05:52:12,755 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 05:52:12,755 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:52:12,756 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:52:12,756 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:52:12,757 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:52:12,757 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:52:12,757 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:12,757 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:52:12,757 INFO ]: Interpolant automaton has 4 states. [2018-06-22 05:52:12,757 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:52:12,757 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:52:12,757 INFO ]: Found error trace [2018-06-22 05:52:12,757 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:12,757 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:12,758 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:52:12,759 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:12,759 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:12,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:12,760 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:52:12,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:12,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:13,210 WARN ]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:52:13,284 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:13,284 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:13,284 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 05:52:13,293 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:52:13,367 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:52:13,367 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:13,371 INFO ]: Computing forward predicates... [2018-06-22 05:52:13,608 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 5 [2018-06-22 05:52:16,935 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:16,968 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:52:16,968 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:52:16,968 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:52:16,969 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:52:16,969 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:52:16,969 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:52:17,649 WARN ]: Spent 426.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:52:17,717 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:17,717 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:52:17,717 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:52:17,717 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:52:17,717 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:17,718 INFO ]: With dead ends: 11 [2018-06-22 05:52:17,718 INFO ]: Without dead ends: 11 [2018-06-22 05:52:17,718 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:52:17,718 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:52:17,719 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:52:17,719 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:52:17,720 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:52:17,720 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:52:17,720 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:17,720 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:52:17,720 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:52:17,720 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:52:17,720 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:52:17,720 INFO ]: Found error trace [2018-06-22 05:52:17,720 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:17,720 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:17,722 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:52:17,722 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:17,722 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:17,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:17,723 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:52:17,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:17,782 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:18,375 WARN ]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:52:18,489 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:18,489 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:18,489 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 05:52:18,496 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:52:18,609 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:52:18,609 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:18,613 INFO ]: Computing forward predicates... [2018-06-22 05:52:22,969 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:23,008 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:52:23,008 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 05:52:23,009 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:52:23,009 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:52:23,009 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:52:23,009 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-06-22 05:52:23,392 WARN ]: Spent 318.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 11 [2018-06-22 05:52:23,510 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:23,510 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:52:23,510 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:52:23,510 INFO ]: Start accepts. Automaton has 6 states. Word has length 10 [2018-06-22 05:52:23,510 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:23,511 INFO ]: With dead ends: 12 [2018-06-22 05:52:23,511 INFO ]: Without dead ends: 12 [2018-06-22 05:52:23,511 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:52:23,511 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:52:23,513 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:52:23,513 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:52:23,513 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:52:23,513 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:52:23,513 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:23,513 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:52:23,513 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:52:23,513 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:52:23,514 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:52:23,514 INFO ]: Found error trace [2018-06-22 05:52:23,514 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:23,514 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:23,514 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:52:23,514 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:23,514 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:23,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:23,515 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:52:23,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:23,565 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:23,825 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:23,825 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:23,825 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 05:52:23,839 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:52:23,908 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:52:23,908 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:23,912 INFO ]: Computing forward predicates... [2018-06-22 05:52:28,382 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:52:29,061 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:29,082 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:52:29,082 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:52:29,083 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:52:29,083 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:52:29,083 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:52:29,083 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:52:29,263 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:29,263 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:52:29,263 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:52:29,263 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:52:29,263 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:29,263 INFO ]: With dead ends: 13 [2018-06-22 05:52:29,263 INFO ]: Without dead ends: 13 [2018-06-22 05:52:29,264 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:52:29,264 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:52:29,265 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:52:29,265 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:52:29,266 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:52:29,266 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:52:29,266 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:29,266 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:52:29,266 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:52:29,266 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:52:29,267 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:52:29,267 INFO ]: Found error trace [2018-06-22 05:52:29,267 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:29,267 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:29,267 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:52:29,267 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:29,267 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:29,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:29,267 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:52:29,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:29,340 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:29,567 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:29,567 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:29,567 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 05:52:29,574 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:52:29,631 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:52:29,631 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:29,636 INFO ]: Computing forward predicates... [2018-06-22 05:52:35,819 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:35,839 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:52:35,839 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 05:52:35,839 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:52:35,839 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:52:35,839 INFO ]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:52:35,840 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-22 05:52:36,013 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:52:36,013 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:52:36,013 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:52:36,013 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-22 05:52:36,013 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:52:36,013 INFO ]: With dead ends: 14 [2018-06-22 05:52:36,013 INFO ]: Without dead ends: 14 [2018-06-22 05:52:36,014 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:52:36,014 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:52:36,015 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:52:36,015 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:52:36,015 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:52:36,015 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:52:36,015 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:52:36,015 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:52:36,015 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:52:36,015 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:52:36,016 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:52:36,016 INFO ]: Found error trace [2018-06-22 05:52:36,016 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:52:36,016 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:52:36,016 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:52:36,016 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:52:36,016 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:52:36,016 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:36,016 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:52:36,017 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:52:36,110 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:36,374 WARN ]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 05:52:36,774 WARN ]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:52:36,875 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:52:36,875 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:52:36,875 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 05:52:36,881 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:52:36,947 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:52:36,947 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:52:36,952 INFO ]: Computing forward predicates... [2018-06-22 05:52:38,439 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 05:52:49,810 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 10 [2018-06-22 05:52:50,198 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:01,985 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:01,998 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:07,340 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:53:08,744 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:12,573 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:12,608 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:12,608 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2018-06-22 05:53:12,608 INFO ]: Interpolant automaton has 11 states [2018-06-22 05:53:12,608 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 05:53:12,608 INFO ]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:53:12,608 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 11 states. [2018-06-22 05:53:12,881 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:12,881 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:53:12,881 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:53:12,881 INFO ]: Start accepts. Automaton has 11 states. Word has length 13 [2018-06-22 05:53:12,881 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:12,881 INFO ]: With dead ends: 15 [2018-06-22 05:53:12,881 INFO ]: Without dead ends: 15 [2018-06-22 05:53:12,882 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:53:12,882 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:53:12,883 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:53:12,883 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:53:12,884 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:53:12,884 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:53:12,884 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:12,884 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:53:12,884 INFO ]: Interpolant automaton has 11 states. [2018-06-22 05:53:12,884 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:53:12,884 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:53:12,884 INFO ]: Found error trace [2018-06-22 05:53:12,885 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:12,885 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:12,885 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:53:12,885 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:12,885 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:12,885 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:12,886 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:53:12,886 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:13,033 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 05:53:13,065 FATAL]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:228) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-06-22 05:53:13,073 INFO ]: Toolchain (without parser) took 63580.13 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 252.1 MB in the beginning and 565.3 MB in the end (delta: -313.2 MB). Peak memory consumption was 893.2 MB. Max. memory is 3.6 GB. [2018-06-22 05:53:13,074 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:53:13,074 INFO ]: ChcToBoogie took 117.86 ms. Allocated memory is still 305.7 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:53:13,075 INFO ]: Boogie Preprocessor took 100.05 ms. Allocated memory is still 305.7 MB. Free memory was 250.1 MB in the beginning and 248.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:53:13,075 INFO ]: RCFGBuilder took 640.17 ms. Allocated memory is still 305.7 MB. Free memory was 248.1 MB in the beginning and 236.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:53:13,076 INFO ]: TraceAbstraction took 62712.05 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.1 MB in the beginning and 565.3 MB in the end (delta: -329.2 MB). Peak memory consumption was 877.2 MB. Max. memory is 3.6 GB. [2018-06-22 05:53:13,079 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 305.7 MB. Free memory is still 270.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 117.86 ms. Allocated memory is still 305.7 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 100.05 ms. Allocated memory is still 305.7 MB. Free memory was 250.1 MB in the beginning and 248.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 640.17 ms. Allocated memory is still 305.7 MB. Free memory was 248.1 MB in the beginning and 236.1 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 62712.05 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 236.1 MB in the beginning and 565.3 MB in the end (delta: -329.2 MB). Peak memory consumption was 877.2 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:215) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/seq2.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-53-13-090.csv Completed graceful shutdown