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/Ackermann05.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:37:09,754 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:37:09,756 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:37:09,772 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:37:09,774 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:37:09,775 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:37:09,776 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:37:09,780 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:37:09,781 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:37:09,783 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:37:09,784 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:37:09,784 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:37:09,785 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:37:09,786 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:37:09,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:37:09,790 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:37:09,792 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:37:09,805 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:37:09,806 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:37:09,807 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:37:09,808 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:37:09,810 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:37:09,810 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:37:09,810 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:37:09,811 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:37:09,812 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:37:09,813 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:37:09,818 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:37:09,819 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:37:09,819 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:37:09,820 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:37:09,820 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:37:09,820 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:37:09,821 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:37:09,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:37:09,825 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 11:37:09,844 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:37:09,844 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:37:09,844 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:37:09,844 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:37:09,845 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:37:09,846 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:37:09,850 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:37:09,850 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:37:09,850 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:37:09,850 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:37:09,850 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:37:09,851 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:37:09,851 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:37:09,851 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:37:09,851 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:37:09,851 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:37:09,851 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:37:09,852 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:37:09,852 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:37:09,854 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:37:09,854 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:37:09,895 INFO ]: Repository-Root is: /tmp [2018-06-22 11:37:09,906 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:37:09,910 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:37:09,911 INFO ]: Initializing SmtParser... [2018-06-22 11:37:09,912 INFO ]: SmtParser initialized [2018-06-22 11:37:09,912 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/termination/Ackermann05.smt2 [2018-06-22 11:37:09,914 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 11:37:10,010 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/termination/Ackermann05.smt2 unknown [2018-06-22 11:37:10,673 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/termination/Ackermann05.smt2 [2018-06-22 11:37:10,678 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:37:10,695 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:37:10,696 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:37:10,696 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:37:10,696 INFO ]: ChcToBoogie initialized [2018-06-22 11:37:10,717 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,852 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10 Unit [2018-06-22 11:37:10,852 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:37:10,853 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:37:10,853 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:37:10,853 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:37:10,884 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,884 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,895 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,895 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,908 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,915 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,922 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (1/1) ... [2018-06-22 11:37:10,928 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:37:10,929 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:37:10,929 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:37:10,929 INFO ]: RCFGBuilder initialized [2018-06-22 11:37:10,930 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (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 11:37:10,945 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:37:10,945 INFO ]: Found specification of procedure False [2018-06-22 11:37:10,945 INFO ]: Found implementation of procedure False [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure failDLRunknownCLN30 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure failDLRunknownCLN30 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure failDLRunknownCLN30 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN17 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure ack_1030DLRunknownCLN17 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN17 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure ack_without_checking_1087DLRunknownCLN26 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure ack_without_checking_1087DLRunknownCLN26 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure ack_without_checking_1087DLRunknownCLN26 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN8 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure ack_1030DLRunknownCLN8 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN8 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure failDLRunknownCLN31 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure failDLRunknownCLN31 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure failDLRunknownCLN31 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure botDLRunknownCLN29 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure botDLRunknownCLN29 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure botDLRunknownCLN29 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure main_1033DLRunknownCLN37 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure main_1033DLRunknownCLN37 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure main_1033DLRunknownCLN37 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure ack_without_checking_1087DLRunknownCLN27 given in one single declaration [2018-06-22 11:37:10,946 INFO ]: Found specification of procedure ack_without_checking_1087DLRunknownCLN27 [2018-06-22 11:37:10,946 INFO ]: Found implementation of procedure ack_without_checking_1087DLRunknownCLN27 [2018-06-22 11:37:10,946 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN18 given in one single declaration [2018-06-22 11:37:10,947 INFO ]: Found specification of procedure ack_1030DLRunknownCLN18 [2018-06-22 11:37:10,947 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN18 [2018-06-22 11:37:10,947 INFO ]: Specification and implementation of procedure ack_1030DLRunknownCLN9 given in one single declaration [2018-06-22 11:37:10,947 INFO ]: Found specification of procedure ack_1030DLRunknownCLN9 [2018-06-22 11:37:10,947 INFO ]: Found implementation of procedure ack_1030DLRunknownCLN9 [2018-06-22 11:37:10,947 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:37:10,947 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:37:10,947 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 11:37:12,125 INFO ]: Using library mode [2018-06-22 11:37:12,126 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:37:12 BoogieIcfgContainer [2018-06-22 11:37:12,131 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:37:12,132 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:37:12,133 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:37:12,139 INFO ]: TraceAbstraction initialized [2018-06-22 11:37:12,139 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:37:10" (1/3) ... [2018-06-22 11:37:12,140 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dac3bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:37:12, skipping insertion in model container [2018-06-22 11:37:12,140 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:37:10" (2/3) ... [2018-06-22 11:37:12,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dac3bbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:37:12, skipping insertion in model container [2018-06-22 11:37:12,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:37:12" (3/3) ... [2018-06-22 11:37:12,145 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:37:12,156 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:37:12,169 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:37:12,212 INFO ]: Using default assertion order modulation [2018-06-22 11:37:12,212 INFO ]: Interprodecural is true [2018-06-22 11:37:12,212 INFO ]: Hoare is false [2018-06-22 11:37:12,212 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:37:12,212 INFO ]: Backedges is TWOTRACK [2018-06-22 11:37:12,212 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:37:12,212 INFO ]: Difference is false [2018-06-22 11:37:12,212 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:37:12,212 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:37:12,230 INFO ]: Start isEmpty. Operand 72 states. [2018-06-22 11:37:12,243 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-22 11:37:12,243 INFO ]: Found error trace [2018-06-22 11:37:12,244 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-22 11:37:12,244 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:12,249 INFO ]: Analyzing trace with hash 408709688, now seen corresponding path program 1 times [2018-06-22 11:37:12,251 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:12,251 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:12,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:12,286 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:12,286 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:12,300 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:12,325 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:37:12,328 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:37:12,328 INFO ]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-06-22 11:37:12,330 INFO ]: Interpolant automaton has 2 states [2018-06-22 11:37:12,346 INFO ]: Constructing interpolant automaton starting with 2 interpolants. [2018-06-22 11:37:12,347 INFO ]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2018-06-22 11:37:12,349 INFO ]: Start difference. First operand 72 states. Second operand 2 states. [2018-06-22 11:37:12,378 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:12,378 INFO ]: Finished difference Result 62 states and 88 transitions. [2018-06-22 11:37:12,378 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-06-22 11:37:12,379 INFO ]: Start accepts. Automaton has 2 states. Word has length 5 [2018-06-22 11:37:12,380 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:12,397 INFO ]: With dead ends: 62 [2018-06-22 11:37:12,397 INFO ]: Without dead ends: 56 [2018-06-22 11:37:12,399 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 11:37:12,414 INFO ]: Start minimizeSevpa. Operand 56 states. [2018-06-22 11:37:12,450 INFO ]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-06-22 11:37:12,451 INFO ]: Start removeUnreachable. Operand 56 states. [2018-06-22 11:37:12,454 INFO ]: Finished removeUnreachable. Reduced from 56 states to 56 states and 80 transitions. [2018-06-22 11:37:12,456 INFO ]: Start accepts. Automaton has 56 states and 80 transitions. Word has length 5 [2018-06-22 11:37:12,456 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:12,456 INFO ]: Abstraction has 56 states and 80 transitions. [2018-06-22 11:37:12,456 INFO ]: Interpolant automaton has 2 states. [2018-06-22 11:37:12,456 INFO ]: Start isEmpty. Operand 56 states and 80 transitions. [2018-06-22 11:37:12,459 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 11:37:12,459 INFO ]: Found error trace [2018-06-22 11:37:12,460 INFO ]: trace histogram [3, 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] [2018-06-22 11:37:12,460 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:12,460 INFO ]: Analyzing trace with hash -21900294, now seen corresponding path program 1 times [2018-06-22 11:37:12,460 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:12,460 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:12,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:12,461 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:12,461 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:12,530 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:12,904 INFO ]: Checked inductivity of 13 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:37:12,904 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:12,904 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 11:37:12,919 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:13,027 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:13,038 INFO ]: Computing forward predicates... [2018-06-22 11:37:13,394 INFO ]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 11:37:13,429 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:37:13,429 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-06-22 11:37:13,429 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:37:13,430 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:37:13,430 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:37:13,430 INFO ]: Start difference. First operand 56 states and 80 transitions. Second operand 8 states. [2018-06-22 11:37:14,344 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:14,344 INFO ]: Finished difference Result 67 states and 119 transitions. [2018-06-22 11:37:14,344 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:37:14,345 INFO ]: Start accepts. Automaton has 8 states. Word has length 37 [2018-06-22 11:37:14,345 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:14,348 INFO ]: With dead ends: 67 [2018-06-22 11:37:14,348 INFO ]: Without dead ends: 67 [2018-06-22 11:37:14,349 INFO ]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:37:14,350 INFO ]: Start minimizeSevpa. Operand 67 states. [2018-06-22 11:37:14,371 INFO ]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-06-22 11:37:14,371 INFO ]: Start removeUnreachable. Operand 67 states. [2018-06-22 11:37:14,374 INFO ]: Finished removeUnreachable. Reduced from 67 states to 67 states and 119 transitions. [2018-06-22 11:37:14,375 INFO ]: Start accepts. Automaton has 67 states and 119 transitions. Word has length 37 [2018-06-22 11:37:14,376 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:14,376 INFO ]: Abstraction has 67 states and 119 transitions. [2018-06-22 11:37:14,376 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:37:14,376 INFO ]: Start isEmpty. Operand 67 states and 119 transitions. [2018-06-22 11:37:14,379 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:37:14,379 INFO ]: Found error trace [2018-06-22 11:37:14,380 INFO ]: trace histogram [4, 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] [2018-06-22 11:37:14,380 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:14,380 INFO ]: Analyzing trace with hash 267941919, now seen corresponding path program 1 times [2018-06-22 11:37:14,380 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:14,380 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:14,381 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:14,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:14,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:14,438 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:14,575 INFO ]: Checked inductivity of 22 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 11:37:14,575 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:14,575 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 11:37:14,586 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:14,660 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:14,665 INFO ]: Computing forward predicates... [2018-06-22 11:37:14,940 INFO ]: Checked inductivity of 22 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:37:14,973 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:37:14,973 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2018-06-22 11:37:14,974 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:37:14,974 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:37:14,974 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:37:14,974 INFO ]: Start difference. First operand 67 states and 119 transitions. Second operand 8 states. [2018-06-22 11:37:15,638 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:15,638 INFO ]: Finished difference Result 79 states and 155 transitions. [2018-06-22 11:37:15,639 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:37:15,639 INFO ]: Start accepts. Automaton has 8 states. Word has length 41 [2018-06-22 11:37:15,640 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:15,644 INFO ]: With dead ends: 79 [2018-06-22 11:37:15,644 INFO ]: Without dead ends: 79 [2018-06-22 11:37:15,644 INFO ]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:37:15,644 INFO ]: Start minimizeSevpa. Operand 79 states. [2018-06-22 11:37:15,664 INFO ]: Finished minimizeSevpa. Reduced states from 79 to 69. [2018-06-22 11:37:15,664 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-22 11:37:15,666 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 126 transitions. [2018-06-22 11:37:15,666 INFO ]: Start accepts. Automaton has 69 states and 126 transitions. Word has length 41 [2018-06-22 11:37:15,666 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:15,666 INFO ]: Abstraction has 69 states and 126 transitions. [2018-06-22 11:37:15,666 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:37:15,667 INFO ]: Start isEmpty. Operand 69 states and 126 transitions. [2018-06-22 11:37:15,669 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 11:37:15,669 INFO ]: Found error trace [2018-06-22 11:37:15,669 INFO ]: trace histogram [6, 3, 3, 3, 3, 3, 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 11:37:15,669 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:15,670 INFO ]: Analyzing trace with hash -242705997, now seen corresponding path program 1 times [2018-06-22 11:37:15,670 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:15,670 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:15,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:15,670 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:15,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:15,706 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:15,779 INFO ]: Checked inductivity of 61 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-06-22 11:37:15,780 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:15,780 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 11:37:15,795 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:37:15,884 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:15,890 INFO ]: Computing forward predicates... [2018-06-22 11:37:16,083 INFO ]: Checked inductivity of 61 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2018-06-22 11:37:16,117 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:37:16,117 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2018-06-22 11:37:16,118 INFO ]: Interpolant automaton has 5 states [2018-06-22 11:37:16,118 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 11:37:16,118 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:37:16,118 INFO ]: Start difference. First operand 69 states and 126 transitions. Second operand 5 states. [2018-06-22 11:37:16,435 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:16,435 INFO ]: Finished difference Result 69 states and 124 transitions. [2018-06-22 11:37:16,435 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:37:16,435 INFO ]: Start accepts. Automaton has 5 states. Word has length 57 [2018-06-22 11:37:16,436 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:16,437 INFO ]: With dead ends: 69 [2018-06-22 11:37:16,437 INFO ]: Without dead ends: 69 [2018-06-22 11:37:16,438 INFO ]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 11:37:16,438 INFO ]: Start minimizeSevpa. Operand 69 states. [2018-06-22 11:37:16,456 INFO ]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-06-22 11:37:16,456 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-22 11:37:16,464 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 124 transitions. [2018-06-22 11:37:16,464 INFO ]: Start accepts. Automaton has 69 states and 124 transitions. Word has length 57 [2018-06-22 11:37:16,464 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:16,464 INFO ]: Abstraction has 69 states and 124 transitions. [2018-06-22 11:37:16,464 INFO ]: Interpolant automaton has 5 states. [2018-06-22 11:37:16,464 INFO ]: Start isEmpty. Operand 69 states and 124 transitions. [2018-06-22 11:37:16,467 INFO ]: Finished isEmpty. Found accepting run of length 62 [2018-06-22 11:37:16,467 INFO ]: Found error trace [2018-06-22 11:37:16,468 INFO ]: trace histogram [7, 3, 3, 3, 3, 3, 3, 3, 3, 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 11:37:16,468 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:16,468 INFO ]: Analyzing trace with hash -1514585805, now seen corresponding path program 2 times [2018-06-22 11:37:16,468 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:16,468 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:16,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:16,469 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:16,469 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:16,503 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:16,638 INFO ]: Checked inductivity of 81 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2018-06-22 11:37:16,638 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:16,638 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 11:37:16,653 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:37:16,726 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:37:16,726 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:16,731 INFO ]: Computing forward predicates... [2018-06-22 11:37:16,785 INFO ]: Checked inductivity of 81 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2018-06-22 11:37:16,806 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:37:16,806 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2018-06-22 11:37:16,807 INFO ]: Interpolant automaton has 9 states [2018-06-22 11:37:16,807 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 11:37:16,807 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 11:37:16,807 INFO ]: Start difference. First operand 69 states and 124 transitions. Second operand 9 states. [2018-06-22 11:37:17,313 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:17,313 INFO ]: Finished difference Result 88 states and 170 transitions. [2018-06-22 11:37:17,314 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:37:17,314 INFO ]: Start accepts. Automaton has 9 states. Word has length 61 [2018-06-22 11:37:17,314 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:17,316 INFO ]: With dead ends: 88 [2018-06-22 11:37:17,316 INFO ]: Without dead ends: 88 [2018-06-22 11:37:17,316 INFO ]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:37:17,316 INFO ]: Start minimizeSevpa. Operand 88 states. [2018-06-22 11:37:17,331 INFO ]: Finished minimizeSevpa. Reduced states from 88 to 84. [2018-06-22 11:37:17,331 INFO ]: Start removeUnreachable. Operand 84 states. [2018-06-22 11:37:17,333 INFO ]: Finished removeUnreachable. Reduced from 84 states to 84 states and 156 transitions. [2018-06-22 11:37:17,333 INFO ]: Start accepts. Automaton has 84 states and 156 transitions. Word has length 61 [2018-06-22 11:37:17,333 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:17,334 INFO ]: Abstraction has 84 states and 156 transitions. [2018-06-22 11:37:17,334 INFO ]: Interpolant automaton has 9 states. [2018-06-22 11:37:17,334 INFO ]: Start isEmpty. Operand 84 states and 156 transitions. [2018-06-22 11:37:17,337 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-22 11:37:17,337 INFO ]: Found error trace [2018-06-22 11:37:17,337 INFO ]: trace histogram [8, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2018-06-22 11:37:17,337 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:17,337 INFO ]: Analyzing trace with hash 389615741, now seen corresponding path program 3 times [2018-06-22 11:37:17,337 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:17,337 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:17,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:17,338 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:37:17,338 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:17,375 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:17,627 INFO ]: Checked inductivity of 103 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2018-06-22 11:37:17,627 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:17,627 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 11:37:17,641 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:37:17,690 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 11:37:17,690 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:17,697 INFO ]: Computing forward predicates... [2018-06-22 11:37:17,779 INFO ]: Checked inductivity of 103 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2018-06-22 11:37:17,800 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:37:17,800 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2018-06-22 11:37:17,801 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:37:17,801 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:37:17,801 INFO ]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:37:17,801 INFO ]: Start difference. First operand 84 states and 156 transitions. Second operand 12 states. [2018-06-22 11:37:18,490 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:18,490 INFO ]: Finished difference Result 115 states and 246 transitions. [2018-06-22 11:37:18,490 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:37:18,490 INFO ]: Start accepts. Automaton has 12 states. Word has length 65 [2018-06-22 11:37:18,490 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:18,492 INFO ]: With dead ends: 115 [2018-06-22 11:37:18,492 INFO ]: Without dead ends: 115 [2018-06-22 11:37:18,492 INFO ]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2018-06-22 11:37:18,492 INFO ]: Start minimizeSevpa. Operand 115 states. [2018-06-22 11:37:18,530 INFO ]: Finished minimizeSevpa. Reduced states from 115 to 99. [2018-06-22 11:37:18,530 INFO ]: Start removeUnreachable. Operand 99 states. [2018-06-22 11:37:18,533 INFO ]: Finished removeUnreachable. Reduced from 99 states to 99 states and 201 transitions. [2018-06-22 11:37:18,533 INFO ]: Start accepts. Automaton has 99 states and 201 transitions. Word has length 65 [2018-06-22 11:37:18,534 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:18,534 INFO ]: Abstraction has 99 states and 201 transitions. [2018-06-22 11:37:18,534 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:37:18,534 INFO ]: Start isEmpty. Operand 99 states and 201 transitions. [2018-06-22 11:37:18,541 INFO ]: Finished isEmpty. Found accepting run of length 146 [2018-06-22 11:37:18,542 INFO ]: Found error trace [2018-06-22 11:37:18,542 INFO ]: trace histogram [19, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 3, 3, 3, 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] [2018-06-22 11:37:18,542 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:18,542 INFO ]: Analyzing trace with hash -1416725623, now seen corresponding path program 1 times [2018-06-22 11:37:18,542 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:18,542 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:18,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:18,543 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:37:18,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:18,579 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:19,011 INFO ]: Checked inductivity of 662 backedges. 51 proven. 48 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2018-06-22 11:37:19,011 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:19,011 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 11:37:19,021 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:19,195 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:19,207 INFO ]: Computing forward predicates... [2018-06-22 11:37:19,257 INFO ]: Checked inductivity of 662 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2018-06-22 11:37:19,279 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:37:19,279 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2018-06-22 11:37:19,279 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:37:19,279 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:37:19,279 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:37:19,280 INFO ]: Start difference. First operand 99 states and 201 transitions. Second operand 8 states. [2018-06-22 11:37:19,763 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:19,763 INFO ]: Finished difference Result 140 states and 304 transitions. [2018-06-22 11:37:19,763 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:37:19,763 INFO ]: Start accepts. Automaton has 8 states. Word has length 145 [2018-06-22 11:37:19,763 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:19,765 INFO ]: With dead ends: 140 [2018-06-22 11:37:19,765 INFO ]: Without dead ends: 126 [2018-06-22 11:37:19,766 INFO ]: 0 DeclaredPredicates, 155 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-06-22 11:37:19,766 INFO ]: Start minimizeSevpa. Operand 126 states. [2018-06-22 11:37:19,783 INFO ]: Finished minimizeSevpa. Reduced states from 126 to 114. [2018-06-22 11:37:19,783 INFO ]: Start removeUnreachable. Operand 114 states. [2018-06-22 11:37:19,786 INFO ]: Finished removeUnreachable. Reduced from 114 states to 114 states and 231 transitions. [2018-06-22 11:37:19,786 INFO ]: Start accepts. Automaton has 114 states and 231 transitions. Word has length 145 [2018-06-22 11:37:19,786 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:19,786 INFO ]: Abstraction has 114 states and 231 transitions. [2018-06-22 11:37:19,786 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:37:19,786 INFO ]: Start isEmpty. Operand 114 states and 231 transitions. [2018-06-22 11:37:19,790 INFO ]: Finished isEmpty. Found accepting run of length 150 [2018-06-22 11:37:19,790 INFO ]: Found error trace [2018-06-22 11:37:19,790 INFO ]: trace histogram [20, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 3, 3, 3, 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] [2018-06-22 11:37:19,790 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:37:19,790 INFO ]: Analyzing trace with hash -2042423506, now seen corresponding path program 2 times [2018-06-22 11:37:19,790 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:37:19,790 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:37:19,791 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:19,791 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:37:19,791 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:37:19,828 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:20,312 INFO ]: Checked inductivity of 725 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2018-06-22 11:37:20,312 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:37:20,312 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) [2018-06-22 11:37:20,326 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:37:20,512 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:37:20,512 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:37:20,521 INFO ]: Computing forward predicates... [2018-06-22 11:37:20,687 INFO ]: Checked inductivity of 725 backedges. 231 proven. 0 refuted. 0 times theorem prover too weak. 494 trivial. 0 not checked. [2018-06-22 11:37:20,719 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 11:37:20,719 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2018-06-22 11:37:20,720 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:37:20,720 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:37:20,720 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:37:20,721 INFO ]: Start difference. First operand 114 states and 231 transitions. Second operand 7 states. [2018-06-22 11:37:20,890 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:37:20,890 INFO ]: Finished difference Result 107 states and 203 transitions. [2018-06-22 11:37:20,891 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 11:37:20,891 INFO ]: Start accepts. Automaton has 7 states. Word has length 149 [2018-06-22 11:37:20,891 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:37:20,891 INFO ]: With dead ends: 107 [2018-06-22 11:37:20,891 INFO ]: Without dead ends: 0 [2018-06-22 11:37:20,892 INFO ]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:37:20,892 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:37:20,892 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:37:20,892 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:37:20,892 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:37:20,892 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 149 [2018-06-22 11:37:20,892 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:37:20,892 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:37:20,892 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:37:20,892 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:37:20,892 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:37:20,897 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:37:20 BoogieIcfgContainer [2018-06-22 11:37:20,898 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:37:20,899 INFO ]: Toolchain (without parser) took 10219.99 ms. Allocated memory was 308.3 MB in the beginning and 432.0 MB in the end (delta: 123.7 MB). Free memory was 234.7 MB in the beginning and 280.3 MB in the end (delta: -45.6 MB). Peak memory consumption was 78.2 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:20,900 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:37:20,900 INFO ]: ChcToBoogie took 156.81 ms. Allocated memory is still 308.3 MB. Free memory was 234.7 MB in the beginning and 231.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:20,901 INFO ]: Boogie Preprocessor took 74.98 ms. Allocated memory is still 308.3 MB. Free memory was 231.7 MB in the beginning and 228.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:20,901 INFO ]: RCFGBuilder took 1202.48 ms. Allocated memory was 308.3 MB in the beginning and 324.5 MB in the end (delta: 16.3 MB). Free memory was 228.7 MB in the beginning and 291.5 MB in the end (delta: -62.8 MB). Peak memory consumption was 47.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:20,901 INFO ]: TraceAbstraction took 8765.45 ms. Allocated memory was 324.5 MB in the beginning and 432.0 MB in the end (delta: 107.5 MB). Free memory was 291.5 MB in the beginning and 280.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 118.7 MB. Max. memory is 3.6 GB. [2018-06-22 11:37:20,908 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 308.3 MB. Free memory is still 271.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 156.81 ms. Allocated memory is still 308.3 MB. Free memory was 234.7 MB in the beginning and 231.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 74.98 ms. Allocated memory is still 308.3 MB. Free memory was 231.7 MB in the beginning and 228.7 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1202.48 ms. Allocated memory was 308.3 MB in the beginning and 324.5 MB in the end (delta: 16.3 MB). Free memory was 228.7 MB in the beginning and 291.5 MB in the end (delta: -62.8 MB). Peak memory consumption was 47.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 8765.45 ms. Allocated memory was 324.5 MB in the beginning and 432.0 MB in the end (delta: 107.5 MB). Free memory was 291.5 MB in the beginning and 280.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 118.7 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, 72 locations, 1 error locations. SAFE Result, 8.6s OverallTime, 8 OverallIterations, 20 TraceHistogramMax, 3.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 617 SDtfs, 32 SDslu, 2275 SDs, 0 SdLazy, 1677 SolverSat, 106 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 617 GetRequests, 553 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=7, 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 42 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 3.0s InterpolantComputationTime, 1115 NumberOfCodeBlocks, 1081 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 1100 ConstructedInterpolants, 0 QuantifiedInterpolants, 144116 SizeOfPredicates, 48 NumberOfNonLiveVariables, 4606 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 15 InterpolantComputations, 6 PerfectInterpolantSequences, 3195/3334 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/Ackermann05.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-37-20-923.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Ackermann05.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-37-20-923.csv Received shutdown request...