java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:44:58,317 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:44:58,319 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:44:58,334 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:44:58,335 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:44:58,335 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:44:58,336 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:44:58,338 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:44:58,340 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:44:58,340 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:44:58,342 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:44:58,342 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:44:58,343 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:44:58,344 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:44:58,344 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:44:58,347 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:44:58,348 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:44:58,357 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:44:58,359 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:44:58,360 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:44:58,361 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:44:58,366 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:44:58,366 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:44:58,367 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:44:58,367 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:44:58,368 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:44:58,369 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:44:58,369 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:44:58,373 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:44:58,373 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:44:58,374 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:44:58,374 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:44:58,375 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:44:58,375 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:44:58,377 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:44:58,377 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:44:58,392 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:44:58,392 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:44:58,392 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:44:58,393 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:44:58,394 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:44:58,394 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:44:58,395 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:44:58,395 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:44:58,395 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:44:58,395 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:44:58,395 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:44:58,396 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:44:58,396 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:44:58,396 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:44:58,396 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:44:58,396 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:44:58,396 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:44:58,397 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:44:58,397 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:44:58,399 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:44:58,399 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:44:58,441 INFO ]: Repository-Root is: /tmp [2018-06-22 14:44:58,454 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:44:58,457 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:44:58,458 INFO ]: Initializing SmtParser... [2018-06-22 14:44:58,459 INFO ]: SmtParser initialized [2018-06-22 14:44:58,459 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v1.smt2 [2018-06-22 14:44:58,460 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 14:44:58,535 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v1.smt2 unknown [2018-06-22 14:44:58,681 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/conc/fib_bench_safe_v1.smt2 [2018-06-22 14:44:58,686 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:44:58,692 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:44:58,693 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:44:58,693 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:44:58,693 INFO ]: ChcToBoogie initialized [2018-06-22 14:44:58,697 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,745 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58 Unit [2018-06-22 14:44:58,745 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:44:58,746 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:44:58,746 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:44:58,746 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:44:58,769 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,769 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,776 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,776 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,782 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,783 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,784 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (1/1) ... [2018-06-22 14:44:58,787 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:44:58,788 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:44:58,788 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:44:58,788 INFO ]: RCFGBuilder initialized [2018-06-22 14:44:58,789 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (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 14:44:58,808 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:44:58,808 INFO ]: Found specification of procedure False [2018-06-22 14:44:58,808 INFO ]: Found implementation of procedure False [2018-06-22 14:44:58,808 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:44:58,808 INFO ]: Found specification of procedure state [2018-06-22 14:44:58,808 INFO ]: Found implementation of procedure state [2018-06-22 14:44:58,808 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:44:58,808 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:44:58,808 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 14:44:59,080 INFO ]: Using library mode [2018-06-22 14:44:59,080 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:44:59 BoogieIcfgContainer [2018-06-22 14:44:59,080 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:44:59,082 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:44:59,082 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:44:59,094 INFO ]: TraceAbstraction initialized [2018-06-22 14:44:59,094 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:44:58" (1/3) ... [2018-06-22 14:44:59,096 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb0384c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:44:59, skipping insertion in model container [2018-06-22 14:44:59,096 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:44:58" (2/3) ... [2018-06-22 14:44:59,097 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb0384c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:44:59, skipping insertion in model container [2018-06-22 14:44:59,097 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:44:59" (3/3) ... [2018-06-22 14:44:59,098 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:44:59,109 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:44:59,120 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:44:59,168 INFO ]: Using default assertion order modulation [2018-06-22 14:44:59,169 INFO ]: Interprodecural is true [2018-06-22 14:44:59,169 INFO ]: Hoare is false [2018-06-22 14:44:59,169 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:44:59,169 INFO ]: Backedges is TWOTRACK [2018-06-22 14:44:59,169 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:44:59,169 INFO ]: Difference is false [2018-06-22 14:44:59,169 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:44:59,169 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:44:59,191 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:44:59,206 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:44:59,206 INFO ]: Found error trace [2018-06-22 14:44:59,207 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:44:59,207 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:44:59,213 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:44:59,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:44:59,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:44:59,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:44:59,265 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:44:59,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:44:59,305 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:44:59,495 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:44:59,497 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:44:59,498 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:44:59,499 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:44:59,515 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:44:59,515 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:44:59,518 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:44:59,618 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:44:59,619 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:44:59,620 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:44:59,621 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:44:59,622 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:44:59,633 INFO ]: With dead ends: 13 [2018-06-22 14:44:59,633 INFO ]: Without dead ends: 13 [2018-06-22 14:44:59,635 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:44:59,648 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:44:59,667 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:44:59,667 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:44:59,668 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:44:59,669 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:44:59,669 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:44:59,669 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:44:59,669 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:44:59,669 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:44:59,670 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:44:59,670 INFO ]: Found error trace [2018-06-22 14:44:59,670 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:44:59,670 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:44:59,670 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:44:59,670 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:44:59,670 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:44:59,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:44:59,671 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:44:59,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:44:59,687 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:00,230 WARN ]: Spent 397.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2018-06-22 14:45:00,540 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 14:45:00,542 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:45:00,542 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:00,542 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 14:45:00,555 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:00,579 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:00,585 INFO ]: Computing forward predicates... [2018-06-22 14:45:00,983 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 20 [2018-06-22 14:45:01,069 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:45:01,092 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:01,092 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:45:01,093 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:45:01,093 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:45:01,093 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:45:01,093 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:45:01,626 WARN ]: Spent 463.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2018-06-22 14:45:02,054 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 14:45:02,077 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:02,077 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:45:02,078 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:45:02,078 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:45:02,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:02,078 INFO ]: With dead ends: 15 [2018-06-22 14:45:02,078 INFO ]: Without dead ends: 15 [2018-06-22 14:45:02,079 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:45:02,080 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:45:02,082 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:45:02,082 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:45:02,083 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:45:02,083 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:45:02,083 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:02,083 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:45:02,083 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:45:02,083 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:45:02,084 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:45:02,084 INFO ]: Found error trace [2018-06-22 14:45:02,084 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:02,084 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:02,084 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:45:02,084 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:02,084 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:02,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:02,085 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:45:02,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:02,127 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:02,446 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 30 [2018-06-22 14:45:02,546 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:45:02,546 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:02,546 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 14:45:02,558 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:45:02,588 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:45:02,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:02,591 INFO ]: Computing forward predicates... [2018-06-22 14:45:03,096 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:45:03,124 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:03,124 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:45:03,124 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:45:03,124 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:45:03,125 INFO ]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:45:03,125 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:45:03,502 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2018-06-22 14:45:03,534 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:03,534 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:45:03,534 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:45:03,534 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:45:03,534 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:03,535 INFO ]: With dead ends: 17 [2018-06-22 14:45:03,535 INFO ]: Without dead ends: 17 [2018-06-22 14:45:03,535 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:45:03,536 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:45:03,541 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:45:03,541 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:45:03,541 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:45:03,541 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:45:03,542 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:03,542 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:45:03,542 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:45:03,542 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:45:03,542 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:45:03,542 INFO ]: Found error trace [2018-06-22 14:45:03,542 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:03,542 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:03,543 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:45:03,543 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:03,543 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:03,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:03,543 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:45:03,543 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:03,587 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:04,069 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2018-06-22 14:45:04,220 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 36 [2018-06-22 14:45:04,430 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 9 [2018-06-22 14:45:04,703 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:45:04,704 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:04,704 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:45:04,713 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:45:04,741 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:45:04,742 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:04,745 INFO ]: Computing forward predicates... [2018-06-22 14:45:05,323 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2018-06-22 14:45:05,525 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:45:05,548 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:05,548 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:45:05,549 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:45:05,549 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:45:05,549 INFO ]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:45:05,549 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:45:05,697 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 35 [2018-06-22 14:45:05,910 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 49 [2018-06-22 14:45:06,186 WARN ]: Spent 240.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 60 [2018-06-22 14:45:06,392 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2018-06-22 14:45:06,417 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:06,418 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:45:06,418 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:45:06,418 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:45:06,418 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:06,419 INFO ]: With dead ends: 19 [2018-06-22 14:45:06,419 INFO ]: Without dead ends: 19 [2018-06-22 14:45:06,419 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:45:06,419 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:45:06,421 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:45:06,421 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:45:06,422 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:45:06,422 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:45:06,422 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:06,422 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:45:06,422 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:45:06,422 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:45:06,423 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:45:06,423 INFO ]: Found error trace [2018-06-22 14:45:06,423 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:06,423 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:06,423 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:45:06,423 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:06,423 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:06,424 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:06,424 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:45:06,424 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:06,484 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:06,950 WARN ]: Spent 145.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 6 [2018-06-22 14:45:07,275 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 43 [2018-06-22 14:45:07,565 WARN ]: Spent 273.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 33 [2018-06-22 14:45:07,875 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2018-06-22 14:45:08,181 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 28 [2018-06-22 14:45:08,459 WARN ]: Spent 245.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 23 [2018-06-22 14:45:08,622 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 6 [2018-06-22 14:45:08,624 INFO ]: Checked inductivity of 36 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:45:08,624 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:08,624 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:45:08,631 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:45:08,650 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:45:08,650 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:08,653 INFO ]: Computing forward predicates... [2018-06-22 14:45:09,864 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2018-06-22 14:45:10,093 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2018-06-22 14:45:10,111 INFO ]: Checked inductivity of 36 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 14:45:10,131 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:10,131 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 14:45:10,132 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:45:10,132 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:45:10,132 INFO ]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:45:10,132 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 14:45:10,406 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2018-06-22 14:45:10,698 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2018-06-22 14:45:10,954 WARN ]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2018-06-22 14:45:10,974 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:10,974 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:45:10,974 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:45:10,974 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 14:45:10,974 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:10,975 INFO ]: With dead ends: 21 [2018-06-22 14:45:10,975 INFO ]: Without dead ends: 21 [2018-06-22 14:45:10,975 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:45:10,975 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:45:10,979 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:45:10,979 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:45:10,980 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:45:10,980 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:45:10,980 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:10,980 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:45:10,980 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:45:10,980 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:45:10,981 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:45:10,981 INFO ]: Found error trace [2018-06-22 14:45:10,981 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:10,981 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:10,981 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:45:10,981 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:10,981 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:10,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:10,982 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:45:10,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:11,152 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:12,244 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 6 [2018-06-22 14:45:12,596 WARN ]: Spent 295.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 29 [2018-06-22 14:45:14,593 WARN ]: Spent 1.92 s on a formula simplification. DAG size of input: 204 DAG size of output: 49 [2018-06-22 14:45:15,473 WARN ]: Spent 778.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 31 [2018-06-22 14:45:16,983 WARN ]: Spent 1.44 s on a formula simplification. DAG size of input: 280 DAG size of output: 44 [2018-06-22 14:45:18,762 WARN ]: Spent 1.55 s on a formula simplification. DAG size of input: 425 DAG size of output: 66 [2018-06-22 14:45:19,600 WARN ]: Spent 604.00 ms on a formula simplification. DAG size of input: 289 DAG size of output: 30 [2018-06-22 14:45:21,220 WARN ]: Spent 1.51 s on a formula simplification. DAG size of input: 297 DAG size of output: 24 [2018-06-22 14:45:22,726 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 300 DAG size of output: 11 [2018-06-22 14:45:23,694 WARN ]: Spent 811.00 ms on a formula simplification. DAG size of input: 267 DAG size of output: 11 [2018-06-22 14:45:24,403 WARN ]: Spent 557.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 13 [2018-06-22 14:45:24,410 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:45:24,410 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:45:24,410 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 14:45:24,426 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:45:24,470 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:45:24,470 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:24,473 INFO ]: Computing forward predicates... [2018-06-22 14:45:26,152 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2018-06-22 14:45:27,173 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2018-06-22 14:45:27,736 WARN ]: Spent 473.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 100 [2018-06-22 14:45:28,868 WARN ]: Spent 863.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 86 [2018-06-22 14:45:28,885 INFO ]: Checked inductivity of 55 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:45:28,907 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:45:28,907 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 14:45:28,907 INFO ]: Interpolant automaton has 25 states [2018-06-22 14:45:28,907 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 14:45:28,907 INFO ]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2018-06-22 14:45:28,908 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 14:45:29,078 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-06-22 14:45:29,247 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2018-06-22 14:45:29,463 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2018-06-22 14:45:29,817 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2018-06-22 14:45:30,542 WARN ]: Spent 683.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 128 [2018-06-22 14:45:31,283 WARN ]: Spent 551.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 113 [2018-06-22 14:45:31,331 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:45:31,331 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:45:31,334 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:45:31,334 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 14:45:31,334 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:45:31,334 INFO ]: With dead ends: 23 [2018-06-22 14:45:31,335 INFO ]: Without dead ends: 23 [2018-06-22 14:45:31,335 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:45:31,335 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:45:31,337 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:45:31,337 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:45:31,338 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:45:31,338 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:45:31,338 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:45:31,338 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:45:31,338 INFO ]: Interpolant automaton has 25 states. [2018-06-22 14:45:31,338 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:45:31,338 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:45:31,338 INFO ]: Found error trace [2018-06-22 14:45:31,338 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:45:31,338 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:45:31,338 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 14:45:31,338 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:45:31,338 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:45:31,339 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:31,339 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:45:31,339 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:45:31,588 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:45:34,988 WARN ]: Spent 1.70 s on a formula simplification. DAG size of input: 331 DAG size of output: 6 [2018-06-22 14:45:35,733 WARN ]: Spent 708.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 12 [2018-06-22 14:45:38,165 WARN ]: Spent 2.30 s on a formula simplification. DAG size of input: 453 DAG size of output: 20 [2018-06-22 14:45:58,152 WARN ]: Spent 19.56 s on a formula simplification. DAG size of input: 603 DAG size of output: 58 Received shutdown request... [2018-06-22 14:46:06,168 WARN ]: Removed 38 from assertion stack [2018-06-22 14:46:06,169 WARN ]: Verification canceled [2018-06-22 14:46:06,173 WARN ]: Timeout [2018-06-22 14:46:06,173 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:46:06 BoogieIcfgContainer [2018-06-22 14:46:06,173 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:46:06,174 INFO ]: Toolchain (without parser) took 67487.21 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 767.6 MB). Free memory was 261.5 MB in the beginning and 693.2 MB in the end (delta: -431.7 MB). Peak memory consumption was 817.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:46:06,174 INFO ]: SmtParser took 0.06 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 14:46:06,174 INFO ]: ChcToBoogie took 52.18 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 14:46:06,175 INFO ]: Boogie Preprocessor took 41.66 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 258.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:46:06,175 INFO ]: RCFGBuilder took 292.50 ms. Allocated memory is still 305.1 MB. Free memory was 258.4 MB in the beginning and 251.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:46:06,176 INFO ]: TraceAbstraction took 67091.08 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 767.6 MB). Free memory was 251.4 MB in the beginning and 693.2 MB in the end (delta: -441.8 MB). Peak memory consumption was 807.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:46:06,178 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 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 52.18 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 41.66 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 258.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 292.50 ms. Allocated memory is still 305.1 MB. Free memory was 258.4 MB in the beginning and 251.4 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 67091.08 ms. Allocated memory was 305.1 MB in the beginning and 1.1 GB in the end (delta: 767.6 MB). Free memory was 251.4 MB in the beginning and 693.2 MB in the end (delta: -441.8 MB). Peak memory consumption was 807.7 MB. 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 34 with TraceHistMax 7, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 731. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 67.0s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 5.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 66 SDtfs, 72 SDslu, 327 SDs, 0 SdLazy, 250 SolverSat, 88 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 26.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 25.6s InterpolantComputationTime, 219 NumberOfCodeBlocks, 219 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 208 ConstructedInterpolants, 2 QuantifiedInterpolants, 169140 SizeOfPredicates, 114 NumberOfNonLiveVariables, 430 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 77/250 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_v1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-46-06-189.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/fib_bench_safe_v1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-46-06-189.csv Completed graceful shutdown