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/hopv/lia/termination/Ackermann02.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:36:31,611 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:36:31,613 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:36:31,628 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:36:31,628 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:36:31,629 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:36:31,630 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:36:31,633 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:36:31,635 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:36:31,636 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:36:31,637 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:36:31,637 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:36:31,638 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:36:31,639 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:36:31,642 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:36:31,643 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:36:31,645 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:36:31,654 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:36:31,655 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:36:31,656 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:36:31,657 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:36:31,661 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:36:31,662 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:36:31,662 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:36:31,662 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:36:31,663 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:36:31,665 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:36:31,666 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:36:31,667 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:36:31,667 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:36:31,668 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:36:31,668 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:36:31,672 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:36:31,673 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:36:31,674 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:36:31,674 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 11:36:31,695 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:36:31,695 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:36:31,695 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:36:31,696 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:36:31,697 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:36:31,697 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:36:31,698 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:36:31,698 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:36:31,698 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:36:31,698 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:36:31,698 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:36:31,699 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:36:31,699 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:36:31,699 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:36:31,699 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:36:31,699 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:36:31,699 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:36:31,700 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:36:31,703 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:36:31,704 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:36:31,704 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:36:31,753 INFO ]: Repository-Root is: /tmp [2018-06-22 11:36:31,770 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:36:31,774 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:36:31,776 INFO ]: Initializing SmtParser... [2018-06-22 11:36:31,776 INFO ]: SmtParser initialized [2018-06-22 11:36:31,777 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/termination/Ackermann02.smt2 [2018-06-22 11:36:31,779 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 11:36:31,859 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/termination/Ackermann02.smt2 unknown [2018-06-22 11:36:32,415 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/termination/Ackermann02.smt2 [2018-06-22 11:36:32,420 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:36:32,426 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:36:32,427 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:36:32,427 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:36:32,427 INFO ]: ChcToBoogie initialized [2018-06-22 11:36:32,430 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,497 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32 Unit [2018-06-22 11:36:32,498 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:36:32,498 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:36:32,498 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:36:32,498 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:36:32,522 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,523 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,535 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,535 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,556 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,561 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,571 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (1/1) ... [2018-06-22 11:36:32,574 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:36:32,575 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:36:32,575 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:36:32,575 INFO ]: RCFGBuilder initialized [2018-06-22 11:36:32,576 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (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 11:36:32,598 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure False [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure False [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure failDLRunknownCLN30 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure failDLRunknownCLN30 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure failDLRunknownCLN30 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN17 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure ack_1030DLRunknownCLN17 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN17 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure ack_without_checking_1087DLRunknownCLN26 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure ack_without_checking_1087DLRunknownCLN26 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure ack_without_checking_1087DLRunknownCLN26 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure main_1033DLRunknownCLN37 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure main_1033DLRunknownCLN37 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure main_1033DLRunknownCLN37 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN18 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure ack_1030DLRunknownCLN18 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN18 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure botDLRunknownCLN29 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure botDLRunknownCLN29 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure botDLRunknownCLN29 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN9 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure ack_1030DLRunknownCLN9 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN9 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure ack_without_checking_1087DLRunknownCLN27 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure ack_without_checking_1087DLRunknownCLN27 [2018-06-22 11:36:32,598 INFO ]: Found implementation of procedure ack_without_checking_1087DLRunknownCLN27 [2018-06-22 11:36:32,598 INFO ]: Specification and implementation of procedure failDLRunknownCLN31 given in one single declaration [2018-06-22 11:36:32,598 INFO ]: Found specification of procedure failDLRunknownCLN31 [2018-06-22 11:36:32,599 INFO ]: Found implementation of procedure failDLRunknownCLN31 [2018-06-22 11:36:32,599 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN8 given in one single declaration [2018-06-22 11:36:32,599 INFO ]: Found specification of procedure ack_1030DLRunknownCLN8 [2018-06-22 11:36:32,599 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN8 [2018-06-22 11:36:32,599 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:36:32,599 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:36:32,599 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 11:36:33,646 INFO ]: Using library mode [2018-06-22 11:36:33,647 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:36:33 BoogieIcfgContainer [2018-06-22 11:36:33,647 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:36:33,648 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:36:33,649 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:36:33,652 INFO ]: TraceAbstraction initialized [2018-06-22 11:36:33,652 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:36:32" (1/3) ... [2018-06-22 11:36:33,653 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cea6ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:36:33, skipping insertion in model container [2018-06-22 11:36:33,653 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:36:32" (2/3) ... [2018-06-22 11:36:33,653 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cea6ab1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:36:33, skipping insertion in model container [2018-06-22 11:36:33,654 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:36:33" (3/3) ... [2018-06-22 11:36:33,656 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:36:33,665 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:36:33,675 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:36:33,723 INFO ]: Using default assertion order modulation [2018-06-22 11:36:33,723 INFO ]: Interprodecural is true [2018-06-22 11:36:33,723 INFO ]: Hoare is false [2018-06-22 11:36:33,723 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:36:33,723 INFO ]: Backedges is TWOTRACK [2018-06-22 11:36:33,724 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:36:33,724 INFO ]: Difference is false [2018-06-22 11:36:33,724 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:36:33,724 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:36:33,752 INFO ]: Start isEmpty. Operand 70 states. [2018-06-22 11:36:33,777 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 11:36:33,777 INFO ]: Found error trace [2018-06-22 11:36:33,778 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 11:36:33,779 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:33,786 INFO ]: Analyzing trace with hash 403106870, now seen corresponding path program 1 times [2018-06-22 11:36:33,789 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:33,789 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:33,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:33,825 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:33,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:33,839 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:33,860 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:36:33,863 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:36:33,863 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 11:36:33,865 INFO ]: Interpolant automaton has 2 states [2018-06-22 11:36:33,883 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 11:36:33,883 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:36:33,886 INFO ]: Start difference. First operand 70 states. Second operand 2 states. [2018-06-22 11:36:33,920 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:33,920 INFO ]: Finished difference Result 59 states and 82 transitions. [2018-06-22 11:36:33,920 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 11:36:33,921 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 11:36:33,922 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:33,944 INFO ]: With dead ends: 59 [2018-06-22 11:36:33,944 INFO ]: Without dead ends: 54 [2018-06-22 11:36:33,947 INFO ]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:36:33,963 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-22 11:36:33,991 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-06-22 11:36:33,992 INFO ]: Start removeUnreachable. Operand 54 states. [2018-06-22 11:36:33,997 INFO ]: Finished removeUnreachable. Reduced from 54 states to 54 states and 76 transitions. [2018-06-22 11:36:33,998 INFO ]: Start accepts. Automaton has 54 states and 76 transitions. Word has length 5 [2018-06-22 11:36:33,998 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:33,998 INFO ]: Abstraction has 54 states and 76 transitions. [2018-06-22 11:36:33,998 INFO ]: Interpolant automaton has 2 states. [2018-06-22 11:36:33,998 INFO ]: Start isEmpty. Operand 54 states and 76 transitions. [2018-06-22 11:36:34,001 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:36:34,001 INFO ]: Found error trace [2018-06-22 11:36:34,001 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:34,001 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:34,002 INFO ]: Analyzing trace with hash -1667384735, now seen corresponding path program 1 times [2018-06-22 11:36:34,002 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:34,002 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:34,002 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:34,003 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:34,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:34,069 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:34,412 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:36:34,412 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:36:34,412 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 11:36:34,414 INFO ]: Interpolant automaton has 6 states [2018-06-22 11:36:34,414 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 11:36:34,414 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:36:34,414 INFO ]: Start difference. First operand 54 states and 76 transitions. Second operand 6 states. [2018-06-22 11:36:34,669 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:34,669 INFO ]: Finished difference Result 58 states and 90 transitions. [2018-06-22 11:36:34,670 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:36:34,670 INFO ]: Start accepts. Automaton has 6 states. Word has length 21 [2018-06-22 11:36:34,670 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:34,673 INFO ]: With dead ends: 58 [2018-06-22 11:36:34,673 INFO ]: Without dead ends: 58 [2018-06-22 11:36:34,674 INFO ]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:36:34,674 INFO ]: Start minimizeSevpa. Operand 58 states. [2018-06-22 11:36:34,688 INFO ]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-06-22 11:36:34,688 INFO ]: Start removeUnreachable. Operand 58 states. [2018-06-22 11:36:34,690 INFO ]: Finished removeUnreachable. Reduced from 58 states to 58 states and 90 transitions. [2018-06-22 11:36:34,690 INFO ]: Start accepts. Automaton has 58 states and 90 transitions. Word has length 21 [2018-06-22 11:36:34,692 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:34,692 INFO ]: Abstraction has 58 states and 90 transitions. [2018-06-22 11:36:34,692 INFO ]: Interpolant automaton has 6 states. [2018-06-22 11:36:34,692 INFO ]: Start isEmpty. Operand 58 states and 90 transitions. [2018-06-22 11:36:34,693 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:36:34,693 INFO ]: Found error trace [2018-06-22 11:36:34,694 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:34,694 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:34,694 INFO ]: Analyzing trace with hash -1934054181, now seen corresponding path program 1 times [2018-06-22 11:36:34,694 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:34,694 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:34,695 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:34,695 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:34,695 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:34,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:35,228 INFO ]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-06-22 11:36:35,228 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:35,228 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 11:36:35,245 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:35,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:35,348 INFO ]: Computing forward predicates... [2018-06-22 11:36:35,523 INFO ]: Checked inductivity of 17 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 11:36:35,554 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:35,554 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 9 [2018-06-22 11:36:35,554 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:36:35,554 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:36:35,554 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:36:35,555 INFO ]: Start difference. First operand 58 states and 90 transitions. Second operand 9 states. [2018-06-22 11:36:36,147 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:36,147 INFO ]: Finished difference Result 65 states and 111 transitions. [2018-06-22 11:36:36,147 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:36:36,147 INFO ]: Start accepts. Automaton has 9 states. Word has length 41 [2018-06-22 11:36:36,147 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:36,150 INFO ]: With dead ends: 65 [2018-06-22 11:36:36,150 INFO ]: Without dead ends: 65 [2018-06-22 11:36:36,150 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:36:36,150 INFO ]: Start minimizeSevpa. Operand 65 states. [2018-06-22 11:36:36,162 INFO ]: Finished minimizeSevpa. Reduced states from 65 to 61. [2018-06-22 11:36:36,162 INFO ]: Start removeUnreachable. Operand 61 states. [2018-06-22 11:36:36,165 INFO ]: Finished removeUnreachable. Reduced from 61 states to 61 states and 96 transitions. [2018-06-22 11:36:36,165 INFO ]: Start accepts. Automaton has 61 states and 96 transitions. Word has length 41 [2018-06-22 11:36:36,165 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:36,165 INFO ]: Abstraction has 61 states and 96 transitions. [2018-06-22 11:36:36,165 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:36:36,165 INFO ]: Start isEmpty. Operand 61 states and 96 transitions. [2018-06-22 11:36:36,169 INFO ]: Finished isEmpty. Found accepting run of length 82 [2018-06-22 11:36:36,169 INFO ]: Found error trace [2018-06-22 11:36:36,169 INFO ]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:36,169 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:36,170 INFO ]: Analyzing trace with hash -769355957, now seen corresponding path program 1 times [2018-06-22 11:36:36,170 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:36,170 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:36,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:36,171 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:36,171 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:36,198 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:36,289 INFO ]: Checked inductivity of 97 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2018-06-22 11:36:36,289 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:36:36,289 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:36:36,289 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:36:36,289 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:36:36,289 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:36:36,290 INFO ]: Start difference. First operand 61 states and 96 transitions. Second operand 4 states. [2018-06-22 11:36:36,410 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:36,410 INFO ]: Finished difference Result 67 states and 118 transitions. [2018-06-22 11:36:36,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:36:36,412 INFO ]: Start accepts. Automaton has 4 states. Word has length 81 [2018-06-22 11:36:36,413 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:36,415 INFO ]: With dead ends: 67 [2018-06-22 11:36:36,415 INFO ]: Without dead ends: 67 [2018-06-22 11:36:36,416 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 11:36:36,416 INFO ]: Start minimizeSevpa. Operand 67 states. [2018-06-22 11:36:36,431 INFO ]: Finished minimizeSevpa. Reduced states from 67 to 63. [2018-06-22 11:36:36,432 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-22 11:36:36,434 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 98 transitions. [2018-06-22 11:36:36,434 INFO ]: Start accepts. Automaton has 63 states and 98 transitions. Word has length 81 [2018-06-22 11:36:36,434 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:36,434 INFO ]: Abstraction has 63 states and 98 transitions. [2018-06-22 11:36:36,434 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:36:36,434 INFO ]: Start isEmpty. Operand 63 states and 98 transitions. [2018-06-22 11:36:36,439 INFO ]: Finished isEmpty. Found accepting run of length 82 [2018-06-22 11:36:36,439 INFO ]: Found error trace [2018-06-22 11:36:36,439 INFO ]: trace histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:36,439 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:36,439 INFO ]: Analyzing trace with hash -834933371, now seen corresponding path program 1 times [2018-06-22 11:36:36,439 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:36,439 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:36,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:36,440 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:36,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:36,469 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:36,605 INFO ]: Checked inductivity of 97 backedges. 22 proven. 8 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-06-22 11:36:36,605 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:36,605 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 11:36:36,612 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:36,716 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:36,723 INFO ]: Computing forward predicates... [2018-06-22 11:36:36,979 INFO ]: Checked inductivity of 97 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2018-06-22 11:36:37,013 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:37,014 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-06-22 11:36:37,014 INFO ]: Interpolant automaton has 13 states [2018-06-22 11:36:37,014 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 11:36:37,014 INFO ]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:36:37,015 INFO ]: Start difference. First operand 63 states and 98 transitions. Second operand 13 states. [2018-06-22 11:36:37,833 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:37,833 INFO ]: Finished difference Result 108 states and 219 transitions. [2018-06-22 11:36:37,835 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 11:36:37,835 INFO ]: Start accepts. Automaton has 13 states. Word has length 81 [2018-06-22 11:36:37,836 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:37,839 INFO ]: With dead ends: 108 [2018-06-22 11:36:37,839 INFO ]: Without dead ends: 108 [2018-06-22 11:36:37,839 INFO ]: 0 DeclaredPredicates, 96 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2018-06-22 11:36:37,840 INFO ]: Start minimizeSevpa. Operand 108 states. [2018-06-22 11:36:37,885 INFO ]: Finished minimizeSevpa. Reduced states from 108 to 83. [2018-06-22 11:36:37,885 INFO ]: Start removeUnreachable. Operand 83 states. [2018-06-22 11:36:37,894 INFO ]: Finished removeUnreachable. Reduced from 83 states to 83 states and 152 transitions. [2018-06-22 11:36:37,894 INFO ]: Start accepts. Automaton has 83 states and 152 transitions. Word has length 81 [2018-06-22 11:36:37,894 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:37,894 INFO ]: Abstraction has 83 states and 152 transitions. [2018-06-22 11:36:37,894 INFO ]: Interpolant automaton has 13 states. [2018-06-22 11:36:37,894 INFO ]: Start isEmpty. Operand 83 states and 152 transitions. [2018-06-22 11:36:37,903 INFO ]: Finished isEmpty. Found accepting run of length 106 [2018-06-22 11:36:37,904 INFO ]: Found error trace [2018-06-22 11:36:37,904 INFO ]: trace histogram [9, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:37,904 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:37,904 INFO ]: Analyzing trace with hash 1450852747, now seen corresponding path program 1 times [2018-06-22 11:36:37,904 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:37,904 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:37,905 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:37,905 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:37,905 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:37,939 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:38,052 INFO ]: Checked inductivity of 196 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2018-06-22 11:36:38,053 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:38,053 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 11:36:38,058 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:38,173 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:38,181 INFO ]: Computing forward predicates... [2018-06-22 11:36:38,211 INFO ]: Checked inductivity of 196 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2018-06-22 11:36:38,232 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:36:38,232 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2018-06-22 11:36:38,233 INFO ]: Interpolant automaton has 5 states [2018-06-22 11:36:38,233 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 11:36:38,233 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:36:38,233 INFO ]: Start difference. First operand 83 states and 152 transitions. Second operand 5 states. [2018-06-22 11:36:38,353 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:38,353 INFO ]: Finished difference Result 83 states and 150 transitions. [2018-06-22 11:36:38,354 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:36:38,354 INFO ]: Start accepts. Automaton has 5 states. Word has length 105 [2018-06-22 11:36:38,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:38,356 INFO ]: With dead ends: 83 [2018-06-22 11:36:38,356 INFO ]: Without dead ends: 83 [2018-06-22 11:36:38,356 INFO ]: 0 DeclaredPredicates, 110 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:36:38,356 INFO ]: Start minimizeSevpa. Operand 83 states. [2018-06-22 11:36:38,375 INFO ]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-06-22 11:36:38,375 INFO ]: Start removeUnreachable. Operand 83 states. [2018-06-22 11:36:38,377 INFO ]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2018-06-22 11:36:38,377 INFO ]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 105 [2018-06-22 11:36:38,377 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:38,377 INFO ]: Abstraction has 83 states and 150 transitions. [2018-06-22 11:36:38,377 INFO ]: Interpolant automaton has 5 states. [2018-06-22 11:36:38,377 INFO ]: Start isEmpty. Operand 83 states and 150 transitions. [2018-06-22 11:36:38,380 INFO ]: Finished isEmpty. Found accepting run of length 142 [2018-06-22 11:36:38,380 INFO ]: Found error trace [2018-06-22 11:36:38,381 INFO ]: trace histogram [12, 8, 8, 8, 8, 8, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:38,381 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:38,381 INFO ]: Analyzing trace with hash 1910832499, now seen corresponding path program 1 times [2018-06-22 11:36:38,381 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:38,381 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:38,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:38,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:38,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:38,421 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:38,840 INFO ]: Checked inductivity of 400 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2018-06-22 11:36:38,840 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:38,840 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 11:36:38,854 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:39,023 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:39,035 INFO ]: Computing forward predicates... [2018-06-22 11:36:39,261 INFO ]: Checked inductivity of 400 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-06-22 11:36:39,282 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:39,282 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2018-06-22 11:36:39,284 INFO ]: Interpolant automaton has 16 states [2018-06-22 11:36:39,284 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 11:36:39,284 INFO ]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-06-22 11:36:39,285 INFO ]: Start difference. First operand 83 states and 150 transitions. Second operand 16 states. [2018-06-22 11:36:39,913 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:39,913 INFO ]: Finished difference Result 114 states and 244 transitions. [2018-06-22 11:36:39,916 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:36:39,916 INFO ]: Start accepts. Automaton has 16 states. Word has length 141 [2018-06-22 11:36:39,917 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:39,920 INFO ]: With dead ends: 114 [2018-06-22 11:36:39,920 INFO ]: Without dead ends: 112 [2018-06-22 11:36:39,921 INFO ]: 0 DeclaredPredicates, 155 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:36:39,922 INFO ]: Start minimizeSevpa. Operand 112 states. [2018-06-22 11:36:39,938 INFO ]: Finished minimizeSevpa. Reduced states from 112 to 86. [2018-06-22 11:36:39,938 INFO ]: Start removeUnreachable. Operand 86 states. [2018-06-22 11:36:39,940 INFO ]: Finished removeUnreachable. Reduced from 86 states to 86 states and 160 transitions. [2018-06-22 11:36:39,940 INFO ]: Start accepts. Automaton has 86 states and 160 transitions. Word has length 141 [2018-06-22 11:36:39,940 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:39,940 INFO ]: Abstraction has 86 states and 160 transitions. [2018-06-22 11:36:39,940 INFO ]: Interpolant automaton has 16 states. [2018-06-22 11:36:39,940 INFO ]: Start isEmpty. Operand 86 states and 160 transitions. [2018-06-22 11:36:39,943 INFO ]: Finished isEmpty. Found accepting run of length 138 [2018-06-22 11:36:39,943 INFO ]: Found error trace [2018-06-22 11:36:39,943 INFO ]: trace histogram [12, 8, 8, 8, 8, 8, 5, 5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:39,943 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:39,944 INFO ]: Analyzing trace with hash 819558873, now seen corresponding path program 1 times [2018-06-22 11:36:39,944 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:39,944 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:39,944 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:39,944 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:39,944 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:39,990 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:41,084 INFO ]: Checked inductivity of 367 backedges. 30 proven. 6 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2018-06-22 11:36:41,084 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:41,084 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 11:36:41,090 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:41,227 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:41,236 INFO ]: Computing forward predicates... [2018-06-22 11:36:41,447 INFO ]: Checked inductivity of 367 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2018-06-22 11:36:41,477 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:41,477 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-06-22 11:36:41,477 INFO ]: Interpolant automaton has 22 states [2018-06-22 11:36:41,478 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 11:36:41,478 INFO ]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:36:41,478 INFO ]: Start difference. First operand 86 states and 160 transitions. Second operand 22 states. [2018-06-22 11:36:44,689 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:44,689 INFO ]: Finished difference Result 225 states and 614 transitions. [2018-06-22 11:36:44,690 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-06-22 11:36:44,690 INFO ]: Start accepts. Automaton has 22 states. Word has length 137 [2018-06-22 11:36:44,691 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:44,703 INFO ]: With dead ends: 225 [2018-06-22 11:36:44,703 INFO ]: Without dead ends: 218 [2018-06-22 11:36:44,704 INFO ]: 0 DeclaredPredicates, 176 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 11:36:44,704 INFO ]: Start minimizeSevpa. Operand 218 states. [2018-06-22 11:36:44,754 INFO ]: Finished minimizeSevpa. Reduced states from 218 to 166. [2018-06-22 11:36:44,754 INFO ]: Start removeUnreachable. Operand 166 states. [2018-06-22 11:36:44,762 INFO ]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2018-06-22 11:36:44,762 INFO ]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 137 [2018-06-22 11:36:44,763 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:44,763 INFO ]: Abstraction has 166 states and 413 transitions. [2018-06-22 11:36:44,763 INFO ]: Interpolant automaton has 22 states. [2018-06-22 11:36:44,763 INFO ]: Start isEmpty. Operand 166 states and 413 transitions. [2018-06-22 11:36:44,772 INFO ]: Finished isEmpty. Found accepting run of length 178 [2018-06-22 11:36:44,772 INFO ]: Found error trace [2018-06-22 11:36:44,772 INFO ]: trace histogram [16, 10, 10, 10, 10, 10, 7, 7, 7, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:44,772 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:44,772 INFO ]: Analyzing trace with hash 231854250, now seen corresponding path program 1 times [2018-06-22 11:36:44,772 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:44,772 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:44,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:44,773 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:44,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:44,788 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:44,976 INFO ]: Checked inductivity of 675 backedges. 64 proven. 5 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2018-06-22 11:36:44,976 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:44,976 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 11:36:44,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:45,180 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:45,192 INFO ]: Computing forward predicates... [2018-06-22 11:36:45,372 INFO ]: Checked inductivity of 675 backedges. 141 proven. 5 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2018-06-22 11:36:45,393 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:45,393 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 11:36:45,394 INFO ]: Interpolant automaton has 6 states [2018-06-22 11:36:45,394 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 11:36:45,394 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:36:45,394 INFO ]: Start difference. First operand 166 states and 413 transitions. Second operand 6 states. [2018-06-22 11:36:45,431 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:45,431 INFO ]: Finished difference Result 161 states and 377 transitions. [2018-06-22 11:36:45,431 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:36:45,431 INFO ]: Start accepts. Automaton has 6 states. Word has length 177 [2018-06-22 11:36:45,431 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:45,435 INFO ]: With dead ends: 161 [2018-06-22 11:36:45,435 INFO ]: Without dead ends: 160 [2018-06-22 11:36:45,435 INFO ]: 0 DeclaredPredicates, 180 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:36:45,436 INFO ]: Start minimizeSevpa. Operand 160 states. [2018-06-22 11:36:45,462 INFO ]: Finished minimizeSevpa. Reduced states from 160 to 158. [2018-06-22 11:36:45,462 INFO ]: Start removeUnreachable. Operand 158 states. [2018-06-22 11:36:45,464 INFO ]: Finished removeUnreachable. Reduced from 158 states to 158 states and 365 transitions. [2018-06-22 11:36:45,464 INFO ]: Start accepts. Automaton has 158 states and 365 transitions. Word has length 177 [2018-06-22 11:36:45,465 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:45,465 INFO ]: Abstraction has 158 states and 365 transitions. [2018-06-22 11:36:45,465 INFO ]: Interpolant automaton has 6 states. [2018-06-22 11:36:45,467 INFO ]: Start isEmpty. Operand 158 states and 365 transitions. [2018-06-22 11:36:45,473 INFO ]: Finished isEmpty. Found accepting run of length 250 [2018-06-22 11:36:45,473 INFO ]: Found error trace [2018-06-22 11:36:45,473 INFO ]: trace histogram [22, 15, 15, 15, 15, 15, 9, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:45,473 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:45,473 INFO ]: Analyzing trace with hash -607441670, now seen corresponding path program 1 times [2018-06-22 11:36:45,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:45,473 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:45,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:45,474 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:45,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:45,527 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:45,789 INFO ]: Checked inductivity of 1358 backedges. 70 proven. 26 refuted. 0 times theorem prover too weak. 1262 trivial. 0 not checked. [2018-06-22 11:36:45,789 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:45,789 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:45,801 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:46,047 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:46,066 INFO ]: Computing forward predicates... [2018-06-22 11:36:46,167 INFO ]: Checked inductivity of 1358 backedges. 353 proven. 0 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2018-06-22 11:36:46,190 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:36:46,190 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-06-22 11:36:46,190 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:36:46,191 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:36:46,191 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:36:46,191 INFO ]: Start difference. First operand 158 states and 365 transitions. Second operand 8 states. [2018-06-22 11:36:46,265 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:46,265 INFO ]: Finished difference Result 158 states and 361 transitions. [2018-06-22 11:36:46,266 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:36:46,266 INFO ]: Start accepts. Automaton has 8 states. Word has length 249 [2018-06-22 11:36:46,266 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:46,269 INFO ]: With dead ends: 158 [2018-06-22 11:36:46,269 INFO ]: Without dead ends: 154 [2018-06-22 11:36:46,270 INFO ]: 0 DeclaredPredicates, 256 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:36:46,270 INFO ]: Start minimizeSevpa. Operand 154 states. [2018-06-22 11:36:46,286 INFO ]: Finished minimizeSevpa. Reduced states from 154 to 154. [2018-06-22 11:36:46,287 INFO ]: Start removeUnreachable. Operand 154 states. [2018-06-22 11:36:46,290 INFO ]: Finished removeUnreachable. Reduced from 154 states to 154 states and 346 transitions. [2018-06-22 11:36:46,290 INFO ]: Start accepts. Automaton has 154 states and 346 transitions. Word has length 249 [2018-06-22 11:36:46,290 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:46,290 INFO ]: Abstraction has 154 states and 346 transitions. [2018-06-22 11:36:46,290 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:36:46,290 INFO ]: Start isEmpty. Operand 154 states and 346 transitions. [2018-06-22 11:36:46,298 INFO ]: Finished isEmpty. Found accepting run of length 250 [2018-06-22 11:36:46,298 INFO ]: Found error trace [2018-06-22 11:36:46,298 INFO ]: trace histogram [22, 15, 15, 15, 15, 15, 9, 9, 9, 9, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:46,298 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:46,298 INFO ]: Analyzing trace with hash -1781959244, now seen corresponding path program 1 times [2018-06-22 11:36:46,298 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:46,298 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:46,299 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:46,299 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:46,299 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:46,346 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:47,342 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-06-22 11:36:47,674 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-06-22 11:36:47,949 INFO ]: Checked inductivity of 1360 backedges. 88 proven. 31 refuted. 0 times theorem prover too weak. 1241 trivial. 0 not checked. [2018-06-22 11:36:47,949 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:47,949 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:47,959 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:48,191 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:48,207 INFO ]: Computing forward predicates... [2018-06-22 11:36:48,324 INFO ]: Checked inductivity of 1360 backedges. 369 proven. 27 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2018-06-22 11:36:48,350 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:48,350 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2018-06-22 11:36:48,351 INFO ]: Interpolant automaton has 17 states [2018-06-22 11:36:48,351 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 11:36:48,351 INFO ]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:36:48,351 INFO ]: Start difference. First operand 154 states and 346 transitions. Second operand 17 states. [2018-06-22 11:36:48,926 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:48,926 INFO ]: Finished difference Result 225 states and 511 transitions. [2018-06-22 11:36:48,926 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:36:48,926 INFO ]: Start accepts. Automaton has 17 states. Word has length 249 [2018-06-22 11:36:48,927 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:48,931 INFO ]: With dead ends: 225 [2018-06-22 11:36:48,931 INFO ]: Without dead ends: 216 [2018-06-22 11:36:48,931 INFO ]: 0 DeclaredPredicates, 275 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:36:48,932 INFO ]: Start minimizeSevpa. Operand 216 states. [2018-06-22 11:36:48,959 INFO ]: Finished minimizeSevpa. Reduced states from 216 to 172. [2018-06-22 11:36:48,959 INFO ]: Start removeUnreachable. Operand 172 states. [2018-06-22 11:36:48,962 INFO ]: Finished removeUnreachable. Reduced from 172 states to 172 states and 370 transitions. [2018-06-22 11:36:48,962 INFO ]: Start accepts. Automaton has 172 states and 370 transitions. Word has length 249 [2018-06-22 11:36:48,962 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:48,962 INFO ]: Abstraction has 172 states and 370 transitions. [2018-06-22 11:36:48,962 INFO ]: Interpolant automaton has 17 states. [2018-06-22 11:36:48,962 INFO ]: Start isEmpty. Operand 172 states and 370 transitions. [2018-06-22 11:36:48,968 INFO ]: Finished isEmpty. Found accepting run of length 262 [2018-06-22 11:36:48,968 INFO ]: Found error trace [2018-06-22 11:36:48,968 INFO ]: trace histogram [23, 16, 16, 16, 16, 16, 9, 9, 9, 9, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:48,968 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:48,969 INFO ]: Analyzing trace with hash -406290168, now seen corresponding path program 2 times [2018-06-22 11:36:48,969 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:48,969 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:48,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:48,969 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:36:48,969 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:49,021 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:49,281 INFO ]: Checked inductivity of 1500 backedges. 103 proven. 124 refuted. 0 times theorem prover too weak. 1273 trivial. 0 not checked. [2018-06-22 11:36:49,281 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:49,281 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:49,287 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:36:49,572 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:36:49,572 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:49,582 INFO ]: Computing forward predicates... [2018-06-22 11:36:49,720 INFO ]: Checked inductivity of 1500 backedges. 770 proven. 0 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2018-06-22 11:36:49,742 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:36:49,742 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2018-06-22 11:36:49,742 INFO ]: Interpolant automaton has 14 states [2018-06-22 11:36:49,742 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 11:36:49,742 INFO ]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-06-22 11:36:49,742 INFO ]: Start difference. First operand 172 states and 370 transitions. Second operand 14 states. [2018-06-22 11:36:50,231 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:50,231 INFO ]: Finished difference Result 214 states and 461 transitions. [2018-06-22 11:36:50,232 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 11:36:50,232 INFO ]: Start accepts. Automaton has 14 states. Word has length 261 [2018-06-22 11:36:50,232 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:50,241 INFO ]: With dead ends: 214 [2018-06-22 11:36:50,241 INFO ]: Without dead ends: 190 [2018-06-22 11:36:50,242 INFO ]: 0 DeclaredPredicates, 279 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:36:50,242 INFO ]: Start minimizeSevpa. Operand 190 states. [2018-06-22 11:36:50,259 INFO ]: Finished minimizeSevpa. Reduced states from 190 to 174. [2018-06-22 11:36:50,259 INFO ]: Start removeUnreachable. Operand 174 states. [2018-06-22 11:36:50,261 INFO ]: Finished removeUnreachable. Reduced from 174 states to 174 states and 367 transitions. [2018-06-22 11:36:50,261 INFO ]: Start accepts. Automaton has 174 states and 367 transitions. Word has length 261 [2018-06-22 11:36:50,262 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:50,262 INFO ]: Abstraction has 174 states and 367 transitions. [2018-06-22 11:36:50,262 INFO ]: Interpolant automaton has 14 states. [2018-06-22 11:36:50,262 INFO ]: Start isEmpty. Operand 174 states and 367 transitions. [2018-06-22 11:36:50,265 INFO ]: Finished isEmpty. Found accepting run of length 302 [2018-06-22 11:36:50,265 INFO ]: Found error trace [2018-06-22 11:36:50,266 INFO ]: trace histogram [27, 18, 18, 18, 18, 18, 11, 11, 11, 11, 8, 8, 8, 8, 6, 6, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:50,266 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:50,266 INFO ]: Analyzing trace with hash 1541350780, now seen corresponding path program 3 times [2018-06-22 11:36:50,266 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:50,266 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:50,266 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:50,266 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:36:50,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:50,312 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:50,545 INFO ]: Checked inductivity of 2072 backedges. 96 proven. 6 refuted. 0 times theorem prover too weak. 1970 trivial. 0 not checked. [2018-06-22 11:36:50,545 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:50,545 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:50,551 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:36:50,863 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-06-22 11:36:50,863 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:50,878 INFO ]: Computing forward predicates... [2018-06-22 11:36:52,419 INFO ]: Checked inductivity of 2072 backedges. 493 proven. 16 refuted. 0 times theorem prover too weak. 1563 trivial. 0 not checked. [2018-06-22 11:36:52,441 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:52,441 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2018-06-22 11:36:52,441 INFO ]: Interpolant automaton has 18 states [2018-06-22 11:36:52,441 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 11:36:52,441 INFO ]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:36:52,442 INFO ]: Start difference. First operand 174 states and 367 transitions. Second operand 18 states. [2018-06-22 11:36:53,792 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:53,792 INFO ]: Finished difference Result 218 states and 491 transitions. [2018-06-22 11:36:53,792 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:36:53,792 INFO ]: Start accepts. Automaton has 18 states. Word has length 301 [2018-06-22 11:36:53,793 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:53,798 INFO ]: With dead ends: 218 [2018-06-22 11:36:53,798 INFO ]: Without dead ends: 218 [2018-06-22 11:36:53,799 INFO ]: 0 DeclaredPredicates, 316 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:36:53,799 INFO ]: Start minimizeSevpa. Operand 218 states. [2018-06-22 11:36:53,857 INFO ]: Finished minimizeSevpa. Reduced states from 218 to 194. [2018-06-22 11:36:53,857 INFO ]: Start removeUnreachable. Operand 194 states. [2018-06-22 11:36:53,859 INFO ]: Finished removeUnreachable. Reduced from 194 states to 194 states and 445 transitions. [2018-06-22 11:36:53,859 INFO ]: Start accepts. Automaton has 194 states and 445 transitions. Word has length 301 [2018-06-22 11:36:53,861 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:53,861 INFO ]: Abstraction has 194 states and 445 transitions. [2018-06-22 11:36:53,861 INFO ]: Interpolant automaton has 18 states. [2018-06-22 11:36:53,861 INFO ]: Start isEmpty. Operand 194 states and 445 transitions. [2018-06-22 11:36:53,868 INFO ]: Finished isEmpty. Found accepting run of length 458 [2018-06-22 11:36:53,868 INFO ]: Found error trace [2018-06-22 11:36:53,868 INFO ]: trace histogram [41, 28, 28, 28, 28, 28, 16, 16, 16, 16, 11, 11, 11, 11, 8, 7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:53,868 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:53,869 INFO ]: Analyzing trace with hash -1166702050, now seen corresponding path program 4 times [2018-06-22 11:36:53,869 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:53,869 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:53,869 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:53,869 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:36:53,869 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:53,953 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:54,574 INFO ]: Checked inductivity of 4885 backedges. 200 proven. 24 refuted. 0 times theorem prover too weak. 4661 trivial. 0 not checked. [2018-06-22 11:36:54,574 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:54,574 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:54,592 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:36:55,258 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:36:55,258 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:55,290 INFO ]: Computing forward predicates... [2018-06-22 11:36:55,514 INFO ]: Checked inductivity of 4885 backedges. 200 proven. 24 refuted. 0 times theorem prover too weak. 4661 trivial. 0 not checked. [2018-06-22 11:36:55,537 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:55,538 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 11:36:55,538 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:36:55,539 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:36:55,539 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:36:55,539 INFO ]: Start difference. First operand 194 states and 445 transitions. Second operand 7 states. [2018-06-22 11:36:55,679 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:36:55,679 INFO ]: Finished difference Result 246 states and 557 transitions. [2018-06-22 11:36:55,680 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:36:55,680 INFO ]: Start accepts. Automaton has 7 states. Word has length 457 [2018-06-22 11:36:55,680 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:36:55,684 INFO ]: With dead ends: 246 [2018-06-22 11:36:55,684 INFO ]: Without dead ends: 214 [2018-06-22 11:36:55,685 INFO ]: 0 DeclaredPredicates, 463 GetRequests, 457 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:36:55,685 INFO ]: Start minimizeSevpa. Operand 214 states. [2018-06-22 11:36:55,705 INFO ]: Finished minimizeSevpa. Reduced states from 214 to 190. [2018-06-22 11:36:55,705 INFO ]: Start removeUnreachable. Operand 190 states. [2018-06-22 11:36:55,707 INFO ]: Finished removeUnreachable. Reduced from 190 states to 190 states and 424 transitions. [2018-06-22 11:36:55,707 INFO ]: Start accepts. Automaton has 190 states and 424 transitions. Word has length 457 [2018-06-22 11:36:55,708 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:36:55,708 INFO ]: Abstraction has 190 states and 424 transitions. [2018-06-22 11:36:55,708 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:36:55,709 INFO ]: Start isEmpty. Operand 190 states and 424 transitions. [2018-06-22 11:36:55,714 INFO ]: Finished isEmpty. Found accepting run of length 362 [2018-06-22 11:36:55,714 INFO ]: Found error trace [2018-06-22 11:36:55,714 INFO ]: trace histogram [32, 22, 22, 22, 22, 22, 13, 13, 13, 13, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:36:55,714 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:36:55,714 INFO ]: Analyzing trace with hash -1963347936, now seen corresponding path program 5 times [2018-06-22 11:36:55,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:36:55,714 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:36:55,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:55,715 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:36:55,715 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:36:55,800 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:56,823 INFO ]: Checked inductivity of 2984 backedges. 138 proven. 73 refuted. 0 times theorem prover too weak. 2773 trivial. 0 not checked. [2018-06-22 11:36:56,824 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:36:56,824 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:36:56,830 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:36:57,376 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-06-22 11:36:57,377 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:36:57,388 INFO ]: Computing forward predicates... [2018-06-22 11:36:57,596 INFO ]: Checked inductivity of 2984 backedges. 120 proven. 18 refuted. 0 times theorem prover too weak. 2846 trivial. 0 not checked. [2018-06-22 11:36:57,618 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:36:57,618 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2018-06-22 11:36:57,619 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:36:57,619 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:36:57,619 INFO ]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:36:57,619 INFO ]: Start difference. First operand 190 states and 424 transitions. Second operand 27 states. [2018-06-22 11:37:00,462 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:00,462 INFO ]: Finished difference Result 438 states and 1371 transitions. [2018-06-22 11:37:00,463 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-06-22 11:37:00,463 INFO ]: Start accepts. Automaton has 27 states. Word has length 361 [2018-06-22 11:37:00,463 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:00,470 INFO ]: With dead ends: 438 [2018-06-22 11:37:00,470 INFO ]: Without dead ends: 420 [2018-06-22 11:37:00,474 INFO ]: 0 DeclaredPredicates, 425 GetRequests, 365 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=307, Invalid=3353, Unknown=0, NotChecked=0, Total=3660 [2018-06-22 11:37:00,475 INFO ]: Start minimizeSevpa. Operand 420 states. [2018-06-22 11:37:00,523 INFO ]: Finished minimizeSevpa. Reduced states from 420 to 281. [2018-06-22 11:37:00,523 INFO ]: Start removeUnreachable. Operand 281 states. [2018-06-22 11:37:00,529 INFO ]: Finished removeUnreachable. Reduced from 281 states to 281 states and 734 transitions. [2018-06-22 11:37:00,529 INFO ]: Start accepts. Automaton has 281 states and 734 transitions. Word has length 361 [2018-06-22 11:37:00,530 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:00,530 INFO ]: Abstraction has 281 states and 734 transitions. [2018-06-22 11:37:00,530 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:37:00,530 INFO ]: Start isEmpty. Operand 281 states and 734 transitions. [2018-06-22 11:37:00,539 INFO ]: Finished isEmpty. Found accepting run of length 522 [2018-06-22 11:37:00,540 INFO ]: Found error trace [2018-06-22 11:37:00,540 INFO ]: trace histogram [47, 32, 32, 32, 32, 32, 18, 18, 18, 18, 13, 13, 13, 13, 10, 9, 9, 9, 9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:37:00,540 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:00,540 INFO ]: Analyzing trace with hash -136650903, now seen corresponding path program 6 times [2018-06-22 11:37:00,540 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:00,540 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:00,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:00,541 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:37:00,541 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:00,609 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:01,478 INFO ]: Checked inductivity of 6453 backedges. 261 proven. 96 refuted. 0 times theorem prover too weak. 6096 trivial. 0 not checked. [2018-06-22 11:37:01,478 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:01,478 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:37:01,484 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:37:01,882 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2018-06-22 11:37:01,882 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:01,897 INFO ]: Computing forward predicates... [2018-06-22 11:37:02,431 INFO ]: Checked inductivity of 6453 backedges. 1702 proven. 152 refuted. 0 times theorem prover too weak. 4599 trivial. 0 not checked. [2018-06-22 11:37:02,453 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:37:02,453 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2018-06-22 11:37:02,454 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:37:02,454 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:37:02,454 INFO ]: CoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:37:02,454 INFO ]: Start difference. First operand 281 states and 734 transitions. Second operand 27 states. [2018-06-22 11:37:06,636 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:06,636 INFO ]: Finished difference Result 393 states and 1036 transitions. [2018-06-22 11:37:06,639 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-06-22 11:37:06,639 INFO ]: Start accepts. Automaton has 27 states. Word has length 521 [2018-06-22 11:37:06,640 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:06,641 INFO ]: With dead ends: 393 [2018-06-22 11:37:06,641 INFO ]: Without dead ends: 0 [2018-06-22 11:37:06,642 INFO ]: 0 DeclaredPredicates, 592 GetRequests, 523 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=478, Invalid=4352, Unknown=0, NotChecked=0, Total=4830 [2018-06-22 11:37:06,642 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:37:06,642 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:37:06,642 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:37:06,642 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:37:06,642 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 521 [2018-06-22 11:37:06,642 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:06,642 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:37:06,642 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:37:06,642 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:37:06,642 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:37:06,824 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:37:06 BoogieIcfgContainer [2018-06-22 11:37:06,824 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:37:06,825 INFO ]: Toolchain (without parser) took 34404.03 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 697.8 MB). Free memory was 244.6 MB in the beginning and 959.8 MB in the end (delta: -715.2 MB). Peak memory consumption was 64.5 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:06,825 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:37:06,825 INFO ]: ChcToBoogie took 71.01 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 241.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:06,826 INFO ]: Boogie Preprocessor took 76.17 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 239.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:06,826 INFO ]: RCFGBuilder took 1071.78 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 206.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:06,826 INFO ]: TraceAbstraction took 33175.32 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 697.8 MB). Free memory was 205.6 MB in the beginning and 959.8 MB in the end (delta: -754.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:06,830 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 71.01 ms. Allocated memory is still 306.2 MB. Free memory was 244.6 MB in the beginning and 241.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 76.17 ms. Allocated memory is still 306.2 MB. Free memory was 241.6 MB in the beginning and 239.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1071.78 ms. Allocated memory is still 306.2 MB. Free memory was 239.6 MB in the beginning and 206.6 MB in the end (delta: 33.0 MB). Peak memory consumption was 33.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 33175.32 ms. Allocated memory was 306.2 MB in the beginning and 1.0 GB in the end (delta: 697.8 MB). Free memory was 205.6 MB in the beginning and 959.8 MB in the end (delta: -754.2 MB). Peak memory consumption was 25.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 12 procedures, 70 locations, 1 error locations. SAFE Result, 33.1s OverallTime, 16 OverallIterations, 47 TraceHistogramMax, 15.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1251 SDtfs, 149 SDslu, 10314 SDs, 0 SdLazy, 12061 SolverSat, 784 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3386 GetRequests, 3075 SyntacticMatches, 12 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=281occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 360 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.7s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 6269 NumberOfCodeBlocks, 6028 NumberOfCodeBlocksAsserted, 73 NumberOfCheckSat, 6240 ConstructedInterpolants, 0 QuantifiedInterpolants, 2303500 SizeOfPredicates, 87 NumberOfNonLiveVariables, 24003 ConjunctsInSsa, 171 ConjunctsInUnsatCore, 29 InterpolantComputations, 6 PerfectInterpolantSequences, 44004/44825 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Ackermann02.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-37-06-846.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Ackermann02.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-37-06-846.csv Received shutdown request...