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/seesaw.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:28:27,570 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:28:27,571 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:28:27,583 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:28:27,584 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:28:27,584 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:28:27,585 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:28:27,587 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:28:27,588 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:28:27,589 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:28:27,590 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:28:27,590 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:28:27,591 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:28:27,593 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:28:27,594 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:28:27,594 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:28:27,596 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:28:27,598 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:28:27,599 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:28:27,600 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:28:27,601 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:28:27,612 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:28:27,613 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:28:27,613 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:28:27,614 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:28:27,616 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:28:27,616 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:28:27,617 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:28:27,620 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:28:27,620 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:28:27,620 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:28:27,621 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:28:27,621 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:28:27,624 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:28:27,624 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:28:27,625 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 15:28:27,637 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:28:27,638 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:28:27,638 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:28:27,638 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:28:27,639 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:28:27,639 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:28:27,640 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:28:27,640 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:28:27,640 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:28:27,640 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:28:27,641 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:28:27,641 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:28:27,641 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:28:27,641 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:28:27,641 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:28:27,641 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:28:27,642 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:28:27,642 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:28:27,642 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:28:27,643 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:28:27,644 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:28:27,693 INFO ]: Repository-Root is: /tmp [2018-06-22 15:28:27,709 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:28:27,714 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:28:27,715 INFO ]: Initializing SmtParser... [2018-06-22 15:28:27,715 INFO ]: SmtParser initialized [2018-06-22 15:28:27,716 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seesaw.c.smt2 [2018-06-22 15:28:27,717 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 15:28:27,803 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seesaw.c.smt2 unknown [2018-06-22 15:28:28,110 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seesaw.c.smt2 [2018-06-22 15:28:28,117 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:28:28,123 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:28:28,123 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:28:28,123 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:28:28,123 INFO ]: ChcToBoogie initialized [2018-06-22 15:28:28,127 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,172 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28 Unit [2018-06-22 15:28:28,172 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:28:28,174 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:28:28,174 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:28:28,174 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:28:28,195 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,195 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,216 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,216 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,221 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,223 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,224 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (1/1) ... [2018-06-22 15:28:28,235 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:28:28,236 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:28:28,236 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:28:28,236 INFO ]: RCFGBuilder initialized [2018-06-22 15:28:28,236 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (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 15:28:28,250 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:28:28,250 INFO ]: Found specification of procedure False [2018-06-22 15:28:28,250 INFO ]: Found implementation of procedure False [2018-06-22 15:28:28,250 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:28:28,250 INFO ]: Found specification of procedure state [2018-06-22 15:28:28,250 INFO ]: Found implementation of procedure state [2018-06-22 15:28:28,250 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:28:28,250 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:28:28,250 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 15:28:28,521 INFO ]: Using library mode [2018-06-22 15:28:28,521 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:28:28 BoogieIcfgContainer [2018-06-22 15:28:28,521 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:28:28,522 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:28:28,522 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:28:28,525 INFO ]: TraceAbstraction initialized [2018-06-22 15:28:28,526 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:28:28" (1/3) ... [2018-06-22 15:28:28,526 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a3b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:28:28, skipping insertion in model container [2018-06-22 15:28:28,527 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:28:28" (2/3) ... [2018-06-22 15:28:28,527 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a3b003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:28:28, skipping insertion in model container [2018-06-22 15:28:28,527 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:28:28" (3/3) ... [2018-06-22 15:28:28,529 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:28:28,537 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:28:28,546 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:28:28,583 INFO ]: Using default assertion order modulation [2018-06-22 15:28:28,583 INFO ]: Interprodecural is true [2018-06-22 15:28:28,583 INFO ]: Hoare is false [2018-06-22 15:28:28,583 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:28:28,583 INFO ]: Backedges is TWOTRACK [2018-06-22 15:28:28,583 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:28:28,583 INFO ]: Difference is false [2018-06-22 15:28:28,583 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:28:28,583 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:28:28,598 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:28:28,613 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:28:28,613 INFO ]: Found error trace [2018-06-22 15:28:28,614 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:28,615 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:28,620 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:28:28,621 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:28,622 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:28,654 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:28,654 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:28:28,654 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:28,678 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:28,733 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:28:28,735 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:28:28,735 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:28:28,736 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:28:28,747 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:28:28,747 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:28:28,749 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:28:28,853 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:28,853 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:28:28,854 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:28:28,855 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:28:28,855 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:28,866 INFO ]: With dead ends: 13 [2018-06-22 15:28:28,866 INFO ]: Without dead ends: 13 [2018-06-22 15:28:28,868 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 15:28:28,881 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:28:28,914 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:28:28,915 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:28:28,916 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:28:28,917 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:28:28,917 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:28,917 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:28:28,917 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:28:28,917 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:28:28,918 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:28:28,918 INFO ]: Found error trace [2018-06-22 15:28:28,918 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:28,918 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:28,918 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:28:28,918 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:28,918 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:28,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:28,919 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:28:28,919 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:28,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:29,302 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:28:29,302 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:29,302 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 15:28:29,310 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:28:29,350 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:29,361 INFO ]: Computing forward predicates... [2018-06-22 15:28:29,554 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:28:29,579 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:29,579 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:28:29,579 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:28:29,579 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:28:29,580 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:28:29,580 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:28:29,764 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:29,764 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:28:29,766 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:28:29,766 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:28:29,766 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:29,766 INFO ]: With dead ends: 15 [2018-06-22 15:28:29,766 INFO ]: Without dead ends: 15 [2018-06-22 15:28:29,767 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:28:29,767 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:28:29,775 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:28:29,775 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:28:29,776 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:28:29,776 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:28:29,776 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:29,776 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:28:29,776 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:28:29,776 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:28:29,777 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:28:29,777 INFO ]: Found error trace [2018-06-22 15:28:29,777 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:29,777 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:29,777 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:28:29,777 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:29,777 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:29,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:29,778 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:28:29,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:29,874 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:30,396 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-22 15:28:30,670 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 19 [2018-06-22 15:28:30,776 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:28:30,776 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:30,776 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 15:28:30,787 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:28:30,861 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:28:30,861 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:30,865 INFO ]: Computing forward predicates... [2018-06-22 15:28:31,158 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 3 [2018-06-22 15:28:31,351 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 17 [2018-06-22 15:28:31,563 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:28:31,582 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:31,582 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:28:31,583 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:28:31,583 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:28:31,583 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:28:31,583 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:28:31,883 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:31,883 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:28:31,886 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:28:31,886 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:28:31,886 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:31,886 INFO ]: With dead ends: 17 [2018-06-22 15:28:31,886 INFO ]: Without dead ends: 17 [2018-06-22 15:28:31,887 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:28:31,887 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:28:31,890 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:28:31,890 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:28:31,891 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:28:31,891 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:28:31,891 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:31,891 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:28:31,891 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:28:31,891 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:28:31,892 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:28:31,892 INFO ]: Found error trace [2018-06-22 15:28:31,892 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:31,892 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:31,892 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:28:31,892 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:31,892 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:31,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:31,893 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:28:31,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:31,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:32,286 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2018-06-22 15:28:32,411 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:28:32,411 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:32,411 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:28:32,421 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:28:32,468 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:28:32,468 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:32,472 INFO ]: Computing forward predicates... [2018-06-22 15:28:34,166 WARN ]: Spent 1.20 s on a formula simplification. DAG size of input: 164 DAG size of output: 43 [2018-06-22 15:28:35,882 WARN ]: Spent 699.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-06-22 15:28:35,900 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:28:35,931 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:35,931 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 15:28:35,931 INFO ]: Interpolant automaton has 14 states [2018-06-22 15:28:35,931 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 15:28:35,932 INFO ]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:28:35,932 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 14 states. [2018-06-22 15:28:36,129 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 15:28:38,048 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 15:28:38,257 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2018-06-22 15:28:39,162 WARN ]: Spent 887.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2018-06-22 15:28:39,671 WARN ]: Spent 491.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2018-06-22 15:28:39,702 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:39,702 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:28:39,702 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:28:39,702 INFO ]: Start accepts. Automaton has 14 states. Word has length 21 [2018-06-22 15:28:39,703 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:39,703 INFO ]: With dead ends: 19 [2018-06-22 15:28:39,703 INFO ]: Without dead ends: 19 [2018-06-22 15:28:39,703 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:28:39,704 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:28:39,706 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:28:39,706 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:28:39,707 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:28:39,707 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:28:39,707 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:39,707 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:28:39,707 INFO ]: Interpolant automaton has 14 states. [2018-06-22 15:28:39,707 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:28:39,708 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:28:39,708 INFO ]: Found error trace [2018-06-22 15:28:39,708 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:39,708 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:39,708 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:28:39,708 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:39,708 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:39,709 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:39,709 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:28:39,709 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:39,771 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:40,604 WARN ]: Spent 515.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2018-06-22 15:28:40,822 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2018-06-22 15:28:41,033 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2018-06-22 15:28:41,277 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:28:41,277 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:41,277 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 15:28:41,284 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:28:41,335 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:28:41,335 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:41,340 INFO ]: Computing forward predicates... [2018-06-22 15:28:42,225 WARN ]: Spent 709.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 40 [2018-06-22 15:28:42,566 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2018-06-22 15:28:43,552 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:28:43,571 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:28:43,571 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2018-06-22 15:28:43,571 INFO ]: Interpolant automaton has 20 states [2018-06-22 15:28:43,571 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 15:28:43,571 INFO ]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2018-06-22 15:28:43,572 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 15:28:44,138 WARN ]: Spent 510.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2018-06-22 15:28:44,424 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 48 [2018-06-22 15:28:44,763 WARN ]: Spent 313.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2018-06-22 15:28:45,185 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2018-06-22 15:28:45,494 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2018-06-22 15:28:45,543 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:28:45,543 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:28:45,544 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:28:45,544 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 15:28:45,544 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:28:45,544 INFO ]: With dead ends: 21 [2018-06-22 15:28:45,544 INFO ]: Without dead ends: 21 [2018-06-22 15:28:45,545 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=119, Invalid=481, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:28:45,545 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:28:45,548 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:28:45,548 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:28:45,549 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:28:45,549 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:28:45,549 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:28:45,549 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:28:45,549 INFO ]: Interpolant automaton has 20 states. [2018-06-22 15:28:45,549 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:28:45,550 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:28:45,550 INFO ]: Found error trace [2018-06-22 15:28:45,550 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:28:45,550 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:28:45,550 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:28:45,550 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:28:45,550 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:28:45,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:45,551 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:28:45,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:28:45,663 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:46,259 WARN ]: Spent 195.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2018-06-22 15:28:46,472 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2018-06-22 15:28:46,602 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2018-06-22 15:28:46,862 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:28:46,863 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:28:46,863 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 15:28:46,871 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:28:46,969 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:28:46,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:28:46,982 INFO ]: Computing forward predicates... [2018-06-22 15:28:50,197 WARN ]: Spent 2.96 s on a formula simplification. DAG size of input: 299 DAG size of output: 81 [2018-06-22 15:28:51,834 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 144 DAG size of output: 77 [2018-06-22 15:28:52,472 WARN ]: Spent 482.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2018-06-22 15:28:52,688 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown