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/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:04:57,284 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:04:57,287 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:04:57,301 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:04:57,302 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:04:57,305 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:04:57,306 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:04:57,308 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:04:57,310 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:04:57,312 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:04:57,314 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:04:57,315 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:04:57,316 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:04:57,317 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:04:57,317 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:04:57,320 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:04:57,322 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:04:57,333 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:04:57,334 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:04:57,335 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:04:57,336 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:04:57,342 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:04:57,342 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:04:57,343 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:04:57,343 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:04:57,344 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:04:57,347 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:04:57,348 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:04:57,349 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:04:57,349 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:04:57,350 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:04:57,350 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:04:57,354 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:04:57,356 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:04:57,356 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:04:57,357 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:04:57,378 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:04:57,379 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:04:57,379 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:04:57,379 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:04:57,380 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:04:57,382 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:04:57,382 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:04:57,382 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:04:57,382 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:04:57,382 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:04:57,383 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:04:57,384 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:04:57,386 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:04:57,386 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:04:57,441 INFO ]: Repository-Root is: /tmp [2018-06-22 05:04:57,458 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:04:57,464 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:04:57,465 INFO ]: Initializing SmtParser... [2018-06-22 05:04:57,465 INFO ]: SmtParser initialized [2018-06-22 05:04:57,466 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 [2018-06-22 05:04:57,468 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 05:04:57,563 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 unknown [2018-06-22 05:04:57,785 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v2.smt2 [2018-06-22 05:04:57,791 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:04:57,798 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:04:57,798 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:04:57,799 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:04:57,799 INFO ]: ChcToBoogie initialized [2018-06-22 05:04:57,802 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,858 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57 Unit [2018-06-22 05:04:57,858 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:04:57,859 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:04:57,859 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:04:57,859 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:04:57,880 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,880 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,886 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,886 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,889 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,891 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,892 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (1/1) ... [2018-06-22 05:04:57,893 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:04:57,894 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:04:57,894 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:04:57,894 INFO ]: RCFGBuilder initialized [2018-06-22 05:04:57,895 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (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 05:04:57,912 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:04:57,912 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:04:57,912 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:04:57,913 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:04:57,913 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:04:57,913 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 05:04:58,075 INFO ]: Using library mode [2018-06-22 05:04:58,076 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:04:58 BoogieIcfgContainer [2018-06-22 05:04:58,076 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:04:58,077 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:04:58,077 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:04:58,080 INFO ]: TraceAbstraction initialized [2018-06-22 05:04:58,081 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:04:57" (1/3) ... [2018-06-22 05:04:58,082 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef28364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:04:58, skipping insertion in model container [2018-06-22 05:04:58,082 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:04:57" (2/3) ... [2018-06-22 05:04:58,082 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ef28364 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:04:58, skipping insertion in model container [2018-06-22 05:04:58,082 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:04:58" (3/3) ... [2018-06-22 05:04:58,084 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:04:58,094 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:04:58,103 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:04:58,149 INFO ]: Using default assertion order modulation [2018-06-22 05:04:58,150 INFO ]: Interprodecural is true [2018-06-22 05:04:58,150 INFO ]: Hoare is false [2018-06-22 05:04:58,150 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:04:58,150 INFO ]: Backedges is TWOTRACK [2018-06-22 05:04:58,150 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:04:58,150 INFO ]: Difference is false [2018-06-22 05:04:58,150 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:04:58,150 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:04:58,165 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:04:58,176 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:04:58,176 INFO ]: Found error trace [2018-06-22 05:04:58,177 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:04:58,178 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:04:58,182 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:04:58,183 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:04:58,184 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:04:58,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:04:58,219 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:04:58,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:04:58,262 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:04:58,375 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:04:58,383 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:04:58,383 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:04:58,390 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:04:58,407 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:04:58,408 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:04:58,411 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:04:58,493 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:04:58,493 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:04:58,494 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:04:58,495 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:04:58,495 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:04:58,506 INFO ]: With dead ends: 9 [2018-06-22 05:04:58,506 INFO ]: Without dead ends: 9 [2018-06-22 05:04:58,508 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 05:04:58,525 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:04:58,539 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:04:58,541 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:04:58,541 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:04:58,543 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:04:58,543 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:04:58,543 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:04:58,543 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:04:58,543 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:04:58,543 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:04:58,543 INFO ]: Found error trace [2018-06-22 05:04:58,543 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:04:58,543 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:04:58,544 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:04:58,544 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:04:58,544 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:04:58,545 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:04:58,545 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:04:58,545 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:04:58,576 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:04:58,821 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 16 [2018-06-22 05:04:58,823 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:04:58,823 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:04:58,823 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 05:04:58,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:04:58,877 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:04:58,889 INFO ]: Computing forward predicates... [2018-06-22 05:04:59,380 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:05:00,896 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 05:05:09,604 WARN ]: Spent 1.99 s on a formula simplification. DAG size of input: 286 DAG size of output: 17 [2018-06-22 05:05:09,616 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:05:09,648 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:05:09,649 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:05:09,649 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:05:09,649 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:05:09,649 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:05:09,649 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:05:09,781 WARN ]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2018-06-22 05:05:09,829 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:05:09,829 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:05:09,830 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:05:09,830 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:05:09,830 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:05:09,830 INFO ]: With dead ends: 10 [2018-06-22 05:05:09,830 INFO ]: Without dead ends: 10 [2018-06-22 05:05:09,831 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:05:09,831 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:05:09,832 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:05:09,832 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:05:09,832 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:05:09,833 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:05:09,834 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:05:09,834 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:05:09,834 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:05:09,834 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:05:09,835 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:05:09,835 INFO ]: Found error trace [2018-06-22 05:05:09,835 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:05:09,835 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:05:09,835 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:05:09,835 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:05:09,835 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:05:09,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:05:09,836 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:05:09,836 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:05:09,896 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:05:10,271 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:05:10,271 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:05:10,271 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 05:05:10,280 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:05:10,329 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:05:10,329 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:05:10,332 INFO ]: Computing forward predicates... [2018-06-22 05:05:16,675 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:16,724 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:16,739 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,757 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:16,762 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,771 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,808 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,826 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:16,861 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,868 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,876 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:16,956 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,019 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,046 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,151 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,171 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,222 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,231 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,262 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,268 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,422 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,621 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,700 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,788 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,826 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,857 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,864 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,875 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,900 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,926 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:17,961 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,970 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:17,980 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,376 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,406 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,425 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,448 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,474 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,518 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,525 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,529 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,542 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,586 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,619 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,637 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,698 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,707 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,745 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,756 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,779 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,799 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,805 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,821 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,837 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,907 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,911 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,945 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,952 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:05:18,959 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,965 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,979 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:05:18,981 WARN ]: expecting exponential blowup for input size 7 Received shutdown request... [2018-06-22 05:06:06,832 INFO ]: Timeout while computing interpolants [2018-06-22 05:06:07,033 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:06:07,033 WARN ]: Verification canceled [2018-06-22 05:06:07,039 WARN ]: Timeout [2018-06-22 05:06:07,039 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:06:07 BoogieIcfgContainer [2018-06-22 05:06:07,039 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:06:07,083 INFO ]: Toolchain (without parser) took 69249.14 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 260.1 MB in the beginning and 155.3 MB in the end (delta: 104.8 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 05:06:07,084 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 305.7 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:06:07,084 INFO ]: ChcToBoogie took 59.90 ms. Allocated memory is still 305.7 MB. Free memory was 260.1 MB in the beginning and 258.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:06:07,085 INFO ]: Boogie Preprocessor took 34.66 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:06:07,085 INFO ]: RCFGBuilder took 181.93 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 248.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:06:07,093 INFO ]: TraceAbstraction took 68962.44 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.1 MB in the beginning and 155.3 MB in the end (delta: 92.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 05:06:07,097 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 305.7 MB. Free memory is still 270.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 59.90 ms. Allocated memory is still 305.7 MB. Free memory was 260.1 MB in the beginning and 258.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 34.66 ms. Allocated memory is still 305.7 MB. Free memory was 258.1 MB in the beginning and 256.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 181.93 ms. Allocated memory is still 305.7 MB. Free memory was 256.1 MB in the beginning and 248.1 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 68962.44 ms. Allocated memory was 305.7 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 248.1 MB in the beginning and 155.3 MB in the end (delta: 92.8 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 10 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 11209 quantified variables from 21 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 68.8s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 15 SDs, 0 SdLazy, 9 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 506 SizeOfPredicates, 8 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib_bench_safe_v2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-06-07-110.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib_bench_safe_v2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-06-07-110.csv Completed graceful shutdown