java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/hopv/lia/termination/Fibonacci02.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:56:23,999 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:56:24,002 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:56:24,019 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:56:24,019 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:56:24,020 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:56:24,021 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:56:24,024 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:56:24,025 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:56:24,027 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:56:24,028 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:56:24,028 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:56:24,029 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:56:24,033 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:56:24,034 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:56:24,035 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:56:24,044 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:56:24,045 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:56:24,047 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:56:24,050 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:56:24,051 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:56:24,055 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:56:24,055 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:56:24,055 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:56:24,056 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:56:24,057 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:56:24,058 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:56:24,060 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:56:24,061 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 01:56:24,061 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:56:24,062 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:56:24,062 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:56:24,062 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:56:24,067 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:56:24,068 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:56:24,068 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:56:24,088 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:56:24,088 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:56:24,088 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:56:24,089 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:56:24,090 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:56:24,090 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:56:24,090 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:56:24,091 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:56:24,091 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:56:24,091 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:56:24,091 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:56:24,091 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:56:24,092 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:56:24,092 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:56:24,092 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:56:24,092 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:56:24,092 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:56:24,094 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:56:24,094 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:56:24,142 INFO ]: Repository-Root is: /tmp [2018-06-22 01:56:24,161 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:56:24,167 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:56:24,168 INFO ]: Initializing SmtParser... [2018-06-22 01:56:24,184 INFO ]: SmtParser initialized [2018-06-22 01:56:24,185 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/termination/Fibonacci02.smt2 [2018-06-22 01:56:24,186 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 01:56:24,279 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/termination/Fibonacci02.smt2 unknown [2018-06-22 01:56:24,639 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/termination/Fibonacci02.smt2 [2018-06-22 01:56:24,647 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:56:24,655 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:56:24,656 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:56:24,656 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:56:24,656 INFO ]: ChcToBoogie initialized [2018-06-22 01:56:24,659 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,736 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24 Unit [2018-06-22 01:56:24,736 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:56:24,737 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:56:24,737 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:56:24,737 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:56:24,758 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,758 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,767 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,768 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,782 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,792 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,794 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (1/1) ... [2018-06-22 01:56:24,805 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:56:24,805 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:56:24,805 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:56:24,805 INFO ]: RCFGBuilder initialized [2018-06-22 01:56:24,806 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (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 01:56:24,819 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:56:24,819 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:56:24,819 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:56:24,819 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:56:24,820 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:56:24,820 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 01:56:25,666 INFO ]: Using library mode [2018-06-22 01:56:25,667 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:56:25 BoogieIcfgContainer [2018-06-22 01:56:25,667 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:56:25,668 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:56:25,668 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:56:25,675 INFO ]: TraceAbstraction initialized [2018-06-22 01:56:25,675 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:56:24" (1/3) ... [2018-06-22 01:56:25,676 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ba81e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:56:25, skipping insertion in model container [2018-06-22 01:56:25,676 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:56:24" (2/3) ... [2018-06-22 01:56:25,676 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28ba81e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:56:25, skipping insertion in model container [2018-06-22 01:56:25,676 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:56:25" (3/3) ... [2018-06-22 01:56:25,678 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:56:25,688 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:56:25,698 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:56:25,756 INFO ]: Using default assertion order modulation [2018-06-22 01:56:25,759 INFO ]: Interprodecural is true [2018-06-22 01:56:25,759 INFO ]: Hoare is false [2018-06-22 01:56:25,759 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:56:25,759 INFO ]: Backedges is TWOTRACK [2018-06-22 01:56:25,759 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:56:25,759 INFO ]: Difference is false [2018-06-22 01:56:25,759 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:56:25,759 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:56:25,785 INFO ]: Start isEmpty. Operand 48 states. [2018-06-22 01:56:25,803 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 01:56:25,803 INFO ]: Found error trace [2018-06-22 01:56:25,804 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:56:25,804 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:56:25,810 INFO ]: Analyzing trace with hash 1984764126, now seen corresponding path program 1 times [2018-06-22 01:56:25,812 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:56:25,812 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:56:25,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:25,859 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:25,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:25,895 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:25,988 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:56:25,990 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:56:25,990 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:56:25,992 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:56:26,004 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:56:26,005 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:56:26,008 INFO ]: Start difference. First operand 48 states. Second operand 4 states. [2018-06-22 01:56:27,126 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:56:27,126 INFO ]: Finished difference Result 89 states and 143 transitions. [2018-06-22 01:56:27,127 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:56:27,128 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-22 01:56:27,128 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:56:27,146 INFO ]: With dead ends: 89 [2018-06-22 01:56:27,146 INFO ]: Without dead ends: 79 [2018-06-22 01:56:27,148 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:56:27,168 INFO ]: Start minimizeSevpa. Operand 79 states. [2018-06-22 01:56:27,210 INFO ]: Finished minimizeSevpa. Reduced states from 79 to 79. [2018-06-22 01:56:27,211 INFO ]: Start removeUnreachable. Operand 79 states. [2018-06-22 01:56:27,218 INFO ]: Finished removeUnreachable. Reduced from 79 states to 79 states and 125 transitions. [2018-06-22 01:56:27,220 INFO ]: Start accepts. Automaton has 79 states and 125 transitions. Word has length 7 [2018-06-22 01:56:27,220 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:56:27,220 INFO ]: Abstraction has 79 states and 125 transitions. [2018-06-22 01:56:27,220 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:56:27,220 INFO ]: Start isEmpty. Operand 79 states and 125 transitions. [2018-06-22 01:56:27,223 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:56:27,223 INFO ]: Found error trace [2018-06-22 01:56:27,223 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:56:27,223 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:56:27,223 INFO ]: Analyzing trace with hash -1718218254, now seen corresponding path program 1 times [2018-06-22 01:56:27,223 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:56:27,223 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:56:27,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:27,224 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:27,224 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:27,234 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:27,293 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:56:27,293 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:56:27,293 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:56:27,295 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:56:27,295 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:56:27,295 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:56:27,295 INFO ]: Start difference. First operand 79 states and 125 transitions. Second operand 4 states. [2018-06-22 01:56:28,018 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:56:28,018 INFO ]: Finished difference Result 102 states and 160 transitions. [2018-06-22 01:56:28,019 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:56:28,019 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 01:56:28,019 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:56:28,024 INFO ]: With dead ends: 102 [2018-06-22 01:56:28,024 INFO ]: Without dead ends: 102 [2018-06-22 01:56:28,025 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:56:28,025 INFO ]: Start minimizeSevpa. Operand 102 states. [2018-06-22 01:56:28,041 INFO ]: Finished minimizeSevpa. Reduced states from 102 to 102. [2018-06-22 01:56:28,041 INFO ]: Start removeUnreachable. Operand 102 states. [2018-06-22 01:56:28,046 INFO ]: Finished removeUnreachable. Reduced from 102 states to 102 states and 160 transitions. [2018-06-22 01:56:28,046 INFO ]: Start accepts. Automaton has 102 states and 160 transitions. Word has length 13 [2018-06-22 01:56:28,046 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:56:28,046 INFO ]: Abstraction has 102 states and 160 transitions. [2018-06-22 01:56:28,046 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:56:28,046 INFO ]: Start isEmpty. Operand 102 states and 160 transitions. [2018-06-22 01:56:28,051 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:56:28,051 INFO ]: Found error trace [2018-06-22 01:56:28,052 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:56:28,052 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:56:28,052 INFO ]: Analyzing trace with hash 53269968, now seen corresponding path program 1 times [2018-06-22 01:56:28,052 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:56:28,052 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:56:28,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:28,053 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:28,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:28,061 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:28,227 INFO ]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:56:28,227 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:56:28,227 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 01:56:28,251 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:28,296 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:28,307 INFO ]: Computing forward predicates... [2018-06-22 01:56:28,334 INFO ]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:56:28,369 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:56:28,369 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 01:56:28,369 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:56:28,369 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:56:28,369 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:56:28,369 INFO ]: Start difference. First operand 102 states and 160 transitions. Second operand 4 states. [2018-06-22 01:56:28,839 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:56:28,839 INFO ]: Finished difference Result 125 states and 195 transitions. [2018-06-22 01:56:28,840 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:56:28,840 INFO ]: Start accepts. Automaton has 4 states. Word has length 22 [2018-06-22 01:56:28,841 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:56:28,852 INFO ]: With dead ends: 125 [2018-06-22 01:56:28,852 INFO ]: Without dead ends: 125 [2018-06-22 01:56:28,853 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:56:28,853 INFO ]: Start minimizeSevpa. Operand 125 states. [2018-06-22 01:56:28,897 INFO ]: Finished minimizeSevpa. Reduced states from 125 to 125. [2018-06-22 01:56:28,897 INFO ]: Start removeUnreachable. Operand 125 states. [2018-06-22 01:56:28,905 INFO ]: Finished removeUnreachable. Reduced from 125 states to 125 states and 195 transitions. [2018-06-22 01:56:28,905 INFO ]: Start accepts. Automaton has 125 states and 195 transitions. Word has length 22 [2018-06-22 01:56:28,905 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:56:28,905 INFO ]: Abstraction has 125 states and 195 transitions. [2018-06-22 01:56:28,905 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:56:28,905 INFO ]: Start isEmpty. Operand 125 states and 195 transitions. [2018-06-22 01:56:28,923 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:56:28,924 INFO ]: Found error trace [2018-06-22 01:56:28,924 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:56:28,925 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:56:28,925 INFO ]: Analyzing trace with hash 644189596, now seen corresponding path program 1 times [2018-06-22 01:56:28,925 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:56:28,925 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:56:28,926 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:28,926 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:28,926 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:28,986 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:29,284 INFO ]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 01:56:29,284 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:56:29,284 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:56:29,284 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:56:29,284 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:56:29,284 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:56:29,285 INFO ]: Start difference. First operand 125 states and 195 transitions. Second operand 5 states. [2018-06-22 01:56:29,716 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:56:29,716 INFO ]: Finished difference Result 220 states and 497 transitions. [2018-06-22 01:56:29,716 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:56:29,716 INFO ]: Start accepts. Automaton has 5 states. Word has length 24 [2018-06-22 01:56:29,716 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:56:29,732 INFO ]: With dead ends: 220 [2018-06-22 01:56:29,732 INFO ]: Without dead ends: 220 [2018-06-22 01:56:29,732 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 01:56:29,733 INFO ]: Start minimizeSevpa. Operand 220 states. [2018-06-22 01:56:29,778 INFO ]: Finished minimizeSevpa. Reduced states from 220 to 133. [2018-06-22 01:56:29,778 INFO ]: Start removeUnreachable. Operand 133 states. [2018-06-22 01:56:29,782 INFO ]: Finished removeUnreachable. Reduced from 133 states to 133 states and 211 transitions. [2018-06-22 01:56:29,782 INFO ]: Start accepts. Automaton has 133 states and 211 transitions. Word has length 24 [2018-06-22 01:56:29,782 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:56:29,782 INFO ]: Abstraction has 133 states and 211 transitions. [2018-06-22 01:56:29,782 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:56:29,782 INFO ]: Start isEmpty. Operand 133 states and 211 transitions. [2018-06-22 01:56:29,785 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 01:56:29,785 INFO ]: Found error trace [2018-06-22 01:56:29,785 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:56:29,786 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:56:29,786 INFO ]: Analyzing trace with hash -1506869223, now seen corresponding path program 1 times [2018-06-22 01:56:29,786 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:56:29,786 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:56:29,787 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:29,787 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:56:29,787 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:56:29,808 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:56:29,939 INFO ]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 01:56:29,939 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:56:29,939 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:56:29,939 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:56:29,940 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:56:29,940 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:56:29,940 INFO ]: Start difference. First operand 133 states and 211 transitions. Second operand 3 states. [2018-06-22 01:56:29,973 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:56:29,973 INFO ]: Finished difference Result 120 states and 185 transitions. [2018-06-22 01:56:29,973 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:56:29,973 INFO ]: Start accepts. Automaton has 3 states. Word has length 25 [2018-06-22 01:56:29,973 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:56:29,974 INFO ]: With dead ends: 120 [2018-06-22 01:56:29,974 INFO ]: Without dead ends: 0 [2018-06-22 01:56:29,974 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:56:29,974 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 01:56:29,974 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 01:56:29,974 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 01:56:29,974 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 01:56:29,974 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2018-06-22 01:56:29,974 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:56:29,974 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 01:56:29,974 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:56:29,974 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 01:56:29,974 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 01:56:29,980 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:56:29 BoogieIcfgContainer [2018-06-22 01:56:29,980 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:56:29,981 INFO ]: Toolchain (without parser) took 5333.69 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 255.1 MB in the beginning and 184.0 MB in the end (delta: 71.1 MB). Peak memory consumption was 89.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:56:29,983 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:56:29,984 INFO ]: ChcToBoogie took 80.35 ms. Allocated memory is still 306.7 MB. Free memory was 255.1 MB in the beginning and 253.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:56:29,984 INFO ]: Boogie Preprocessor took 67.88 ms. Allocated memory is still 306.7 MB. Free memory was 253.1 MB in the beginning and 251.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:56:29,985 INFO ]: RCFGBuilder took 861.87 ms. Allocated memory is still 306.7 MB. Free memory was 251.1 MB in the beginning and 227.2 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:56:29,985 INFO ]: TraceAbstraction took 4312.01 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 227.2 MB in the beginning and 184.0 MB in the end (delta: 43.2 MB). Peak memory consumption was 61.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:56:29,993 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 306.7 MB. Free memory is still 271.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 80.35 ms. Allocated memory is still 306.7 MB. Free memory was 255.1 MB in the beginning and 253.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 67.88 ms. Allocated memory is still 306.7 MB. Free memory was 253.1 MB in the beginning and 251.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 861.87 ms. Allocated memory is still 306.7 MB. Free memory was 251.1 MB in the beginning and 227.2 MB in the end (delta: 24.0 MB). Peak memory consumption was 24.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4312.01 ms. Allocated memory was 306.7 MB in the beginning and 324.5 MB in the end (delta: 17.8 MB). Free memory was 227.2 MB in the beginning and 184.0 MB in the end (delta: 43.2 MB). Peak memory consumption was 61.0 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 2 procedures, 48 locations, 1 error locations. SAFE Result, 4.2s OverallTime, 5 OverallIterations, 2 TraceHistogramMax, 2.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 316 SDtfs, 247 SDslu, 366 SDs, 0 SdLazy, 315 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=4, 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, 5 MinimizatonAttempts, 87 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 107 ConstructedInterpolants, 0 QuantifiedInterpolants, 4168 SizeOfPredicates, 1 NumberOfNonLiveVariables, 94 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 20/22 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/Fibonacci02.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-56-30-005.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/Fibonacci02.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-56-30-005.csv Received shutdown request...