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/mochi/fib.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:46:04,064 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:46:04,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:46:04,079 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:46:04,080 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:46:04,081 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:46:04,082 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:46:04,085 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:46:04,086 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:46:04,088 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:46:04,088 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:46:04,089 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:46:04,089 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:46:04,090 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:46:04,093 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:46:04,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:46:04,095 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:46:04,105 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:46:04,107 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:46:04,108 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:46:04,109 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:46:04,114 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-22 01:46:04,120 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:46:04,120 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:46:04,121 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:46:04,121 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:46:04,125 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:46:04,126 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:46:04,126 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:46:04,142 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:46:04,142 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:46:04,143 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:46:04,143 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:46:04,144 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:46:04,144 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:46:04,144 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:46:04,145 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:46:04,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:46:04,145 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:46:04,145 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:46:04,145 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:46:04,145 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:46:04,146 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:46:04,146 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:46:04,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:46:04,146 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:46:04,148 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:46:04,148 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:46:04,187 INFO ]: Repository-Root is: /tmp [2018-06-22 01:46:04,205 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:46:04,210 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:46:04,211 INFO ]: Initializing SmtParser... [2018-06-22 01:46:04,212 INFO ]: SmtParser initialized [2018-06-22 01:46:04,212 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/fib.smt2 [2018-06-22 01:46:04,214 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 01:46:04,305 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/fib.smt2 unknown [2018-06-22 01:46:04,442 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/fib.smt2 [2018-06-22 01:46:04,447 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:46:04,456 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:46:04,456 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:46:04,456 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:46:04,457 INFO ]: ChcToBoogie initialized [2018-06-22 01:46:04,460 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,514 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04 Unit [2018-06-22 01:46:04,514 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:46:04,515 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:46:04,515 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:46:04,515 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:46:04,535 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,535 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,541 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,541 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,543 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,546 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,547 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (1/1) ... [2018-06-22 01:46:04,549 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:46:04,550 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:46:04,550 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:46:04,550 INFO ]: RCFGBuilder initialized [2018-06-22 01:46:04,551 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (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 01:46:04,564 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:46:04,564 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:46:04,564 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:46:04,564 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:46:04,564 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:46:04,564 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 01:46:04,796 INFO ]: Using library mode [2018-06-22 01:46:04,796 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:46:04 BoogieIcfgContainer [2018-06-22 01:46:04,797 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:46:04,797 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:46:04,797 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:46:04,808 INFO ]: TraceAbstraction initialized [2018-06-22 01:46:04,808 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:46:04" (1/3) ... [2018-06-22 01:46:04,809 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bce723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:46:04, skipping insertion in model container [2018-06-22 01:46:04,809 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:46:04" (2/3) ... [2018-06-22 01:46:04,810 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bce723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:46:04, skipping insertion in model container [2018-06-22 01:46:04,810 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:46:04" (3/3) ... [2018-06-22 01:46:04,811 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:46:04,829 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:46:04,844 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:46:04,885 INFO ]: Using default assertion order modulation [2018-06-22 01:46:04,885 INFO ]: Interprodecural is true [2018-06-22 01:46:04,885 INFO ]: Hoare is false [2018-06-22 01:46:04,885 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:46:04,885 INFO ]: Backedges is TWOTRACK [2018-06-22 01:46:04,885 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:46:04,885 INFO ]: Difference is false [2018-06-22 01:46:04,885 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:46:04,885 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:46:04,898 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 01:46:04,915 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 01:46:04,915 INFO ]: Found error trace [2018-06-22 01:46:04,916 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:46:04,916 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:46:04,921 INFO ]: Analyzing trace with hash 81667677, now seen corresponding path program 1 times [2018-06-22 01:46:04,923 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:46:04,923 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:46:04,959 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:04,959 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:46:04,959 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:04,999 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:05,082 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:46:05,084 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:46:05,084 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:46:05,086 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:46:05,101 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:46:05,102 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:46:05,104 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 01:46:05,306 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:46:05,307 INFO ]: Finished difference Result 19 states and 23 transitions. [2018-06-22 01:46:05,308 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:46:05,309 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-22 01:46:05,309 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:46:05,320 INFO ]: With dead ends: 19 [2018-06-22 01:46:05,321 INFO ]: Without dead ends: 19 [2018-06-22 01:46:05,325 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 01:46:05,337 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 01:46:05,357 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 01:46:05,358 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 01:46:05,359 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2018-06-22 01:46:05,360 INFO ]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 7 [2018-06-22 01:46:05,361 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:46:05,361 INFO ]: Abstraction has 19 states and 23 transitions. [2018-06-22 01:46:05,361 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:46:05,362 INFO ]: Start isEmpty. Operand 19 states and 23 transitions. [2018-06-22 01:46:05,363 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 01:46:05,363 INFO ]: Found error trace [2018-06-22 01:46:05,363 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:46:05,363 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:46:05,363 INFO ]: Analyzing trace with hash -1714359962, now seen corresponding path program 1 times [2018-06-22 01:46:05,363 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:46:05,363 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:46:05,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:05,367 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:46:05,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:05,376 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:05,438 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:46:05,438 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:46:05,438 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 01:46:05,440 INFO ]: Interpolant automaton has 3 states [2018-06-22 01:46:05,440 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 01:46:05,440 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 01:46:05,440 INFO ]: Start difference. First operand 19 states and 23 transitions. Second operand 3 states. [2018-06-22 01:46:05,464 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:46:05,464 INFO ]: Finished difference Result 25 states and 31 transitions. [2018-06-22 01:46:05,465 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 01:46:05,465 INFO ]: Start accepts. Automaton has 3 states. Word has length 8 [2018-06-22 01:46:05,465 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:46:05,466 INFO ]: With dead ends: 25 [2018-06-22 01:46:05,466 INFO ]: Without dead ends: 25 [2018-06-22 01:46:05,466 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 01:46:05,467 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 01:46:05,471 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 21. [2018-06-22 01:46:05,471 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 01:46:05,472 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2018-06-22 01:46:05,472 INFO ]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 8 [2018-06-22 01:46:05,472 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:46:05,472 INFO ]: Abstraction has 21 states and 25 transitions. [2018-06-22 01:46:05,472 INFO ]: Interpolant automaton has 3 states. [2018-06-22 01:46:05,472 INFO ]: Start isEmpty. Operand 21 states and 25 transitions. [2018-06-22 01:46:05,473 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:46:05,473 INFO ]: Found error trace [2018-06-22 01:46:05,473 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:46:05,473 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:46:05,473 INFO ]: Analyzing trace with hash -853368821, now seen corresponding path program 1 times [2018-06-22 01:46:05,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:46:05,474 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:46:05,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:05,474 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:46:05,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:05,490 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:05,763 INFO ]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 01:46:05,776 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:46:05,776 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 01:46:05,786 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:46:05,819 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:05,829 INFO ]: Computing forward predicates... [2018-06-22 01:46:06,063 INFO ]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-22 01:46:06,086 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:46:06,086 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 01:46:06,087 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:46:06,087 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:46:06,087 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:46:06,087 INFO ]: Start difference. First operand 21 states and 25 transitions. Second operand 10 states. [2018-06-22 01:46:06,955 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2018-06-22 01:46:07,304 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:46:07,304 INFO ]: Finished difference Result 48 states and 69 transitions. [2018-06-22 01:46:07,304 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:46:07,304 INFO ]: Start accepts. Automaton has 10 states. Word has length 16 [2018-06-22 01:46:07,304 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:46:07,307 INFO ]: With dead ends: 48 [2018-06-22 01:46:07,307 INFO ]: Without dead ends: 40 [2018-06-22 01:46:07,308 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2018-06-22 01:46:07,308 INFO ]: Start minimizeSevpa. Operand 40 states. [2018-06-22 01:46:07,315 INFO ]: Finished minimizeSevpa. Reduced states from 40 to 28. [2018-06-22 01:46:07,315 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-22 01:46:07,316 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2018-06-22 01:46:07,316 INFO ]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 16 [2018-06-22 01:46:07,316 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:46:07,316 INFO ]: Abstraction has 28 states and 37 transitions. [2018-06-22 01:46:07,316 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:46:07,316 INFO ]: Start isEmpty. Operand 28 states and 37 transitions. [2018-06-22 01:46:07,317 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:46:07,317 INFO ]: Found error trace [2018-06-22 01:46:07,317 INFO ]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-06-22 01:46:07,317 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:46:07,318 INFO ]: Analyzing trace with hash 750163760, now seen corresponding path program 2 times [2018-06-22 01:46:07,318 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:46:07,318 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:46:07,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:07,319 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:46:07,319 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:46:07,340 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:07,477 INFO ]: Checked inductivity of 24 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-06-22 01:46:07,477 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:46:07,477 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 01:46:07,485 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:46:07,508 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:46:07,524 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:46:07,527 INFO ]: Computing forward predicates... [2018-06-22 01:46:07,809 INFO ]: Checked inductivity of 24 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-22 01:46:07,830 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:46:07,830 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-06-22 01:46:07,831 INFO ]: Interpolant automaton has 19 states [2018-06-22 01:46:07,831 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 01:46:07,831 INFO ]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:46:07,831 INFO ]: Start difference. First operand 28 states and 37 transitions. Second operand 19 states. [2018-06-22 01:46:08,861 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:46:08,861 INFO ]: Finished difference Result 41 states and 58 transitions. [2018-06-22 01:46:08,862 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-22 01:46:08,862 INFO ]: Start accepts. Automaton has 19 states. Word has length 24 [2018-06-22 01:46:08,862 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:46:08,862 INFO ]: With dead ends: 41 [2018-06-22 01:46:08,862 INFO ]: Without dead ends: 0 [2018-06-22 01:46:08,863 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 01:46:08,863 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 01:46:08,863 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 01:46:08,863 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 01:46:08,863 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 01:46:08,863 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2018-06-22 01:46:08,863 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:46:08,863 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 01:46:08,864 INFO ]: Interpolant automaton has 19 states. [2018-06-22 01:46:08,864 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 01:46:08,864 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 01:46:08,867 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:46:08 BoogieIcfgContainer [2018-06-22 01:46:08,867 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:46:08,868 INFO ]: Toolchain (without parser) took 4420.88 ms. Allocated memory was 305.1 MB in the beginning and 339.2 MB in the end (delta: 34.1 MB). Free memory was 262.5 MB in the beginning and 233.2 MB in the end (delta: 29.3 MB). Peak memory consumption was 63.4 MB. Max. memory is 3.6 GB. [2018-06-22 01:46:08,869 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:46:08,870 INFO ]: ChcToBoogie took 58.25 ms. Allocated memory is still 305.1 MB. Free memory was 261.5 MB in the beginning and 259.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:46:08,870 INFO ]: Boogie Preprocessor took 34.38 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 258.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 01:46:08,871 INFO ]: RCFGBuilder took 246.82 ms. Allocated memory is still 305.1 MB. Free memory was 258.5 MB in the beginning and 251.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:46:08,872 INFO ]: TraceAbstraction took 4069.90 ms. Allocated memory was 305.1 MB in the beginning and 339.2 MB in the end (delta: 34.1 MB). Free memory was 251.5 MB in the beginning and 233.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 52.4 MB. Max. memory is 3.6 GB. [2018-06-22 01:46:08,875 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 305.1 MB. Free memory is still 270.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.25 ms. Allocated memory is still 305.1 MB. Free memory was 261.5 MB in the beginning and 259.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.38 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 258.5 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 246.82 ms. Allocated memory is still 305.1 MB. Free memory was 258.5 MB in the beginning and 251.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 4069.90 ms. Allocated memory was 305.1 MB in the beginning and 339.2 MB in the end (delta: 34.1 MB). Free memory was 251.5 MB in the beginning and 233.2 MB in the end (delta: 18.4 MB). Peak memory consumption was 52.4 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, 13 locations, 1 error locations. SAFE Result, 3.9s OverallTime, 4 OverallIterations, 3 TraceHistogramMax, 2.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 47 SDtfs, 66 SDslu, 134 SDs, 0 SdLazy, 573 SolverSat, 125 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 16 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 89 ConstructedInterpolants, 0 QuantifiedInterpolants, 4611 SizeOfPredicates, 18 NumberOfNonLiveVariables, 159 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 37/62 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/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-46-08-887.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-46-08-887.csv Received shutdown request...