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/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.upper_strengthening_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 12:33:59,334 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 12:33:59,336 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 12:33:59,348 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 12:33:59,348 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 12:33:59,349 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 12:33:59,352 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 12:33:59,354 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 12:33:59,355 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 12:33:59,357 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 12:33:59,357 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 12:33:59,358 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 12:33:59,358 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 12:33:59,359 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 12:33:59,362 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 12:33:59,363 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 12:33:59,365 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 12:33:59,374 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 12:33:59,376 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 12:33:59,377 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 12:33:59,378 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 12:33:59,383 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 12:33:59,383 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 12:33:59,383 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 12:33:59,384 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 12:33:59,385 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 12:33:59,387 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 12:33:59,387 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 12:33:59,388 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 12:33:59,388 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 12:33:59,389 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 12:33:59,389 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 12:33:59,390 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 12:33:59,392 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 12:33:59,393 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 12:33:59,393 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 12:33:59,413 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 12:33:59,414 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 12:33:59,414 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 12:33:59,414 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 12:33:59,415 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 12:33:59,415 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 12:33:59,415 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 12:33:59,416 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 12:33:59,416 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 12:33:59,416 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 12:33:59,416 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 12:33:59,416 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 12:33:59,416 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 12:33:59,417 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 12:33:59,417 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 12:33:59,417 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 12:33:59,417 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 12:33:59,417 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 12:33:59,418 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 12:33:59,419 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 12:33:59,419 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 12:33:59,466 INFO ]: Repository-Root is: /tmp [2018-06-22 12:33:59,481 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 12:33:59,486 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 12:33:59,488 INFO ]: Initializing SmtParser... [2018-06-22 12:33:59,488 INFO ]: SmtParser initialized [2018-06-22 12:33:59,489 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.upper_strengthening_2.smt2 [2018-06-22 12:33:59,490 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 12:33:59,561 INFO ]: Executing SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.upper_strengthening_2.smt2 unknown [2018-06-22 12:33:59,879 INFO ]: Succesfully executed SMT file /storage/chc-comp/sally-chc-benchmarks/lfht/lfht_2_mini_cleaned.upper_strengthening_2.smt2 [2018-06-22 12:33:59,883 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 12:33:59,889 INFO ]: Walking toolchain with 4 elements. [2018-06-22 12:33:59,889 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 12:33:59,890 INFO ]: Initializing ChcToBoogie... [2018-06-22 12:33:59,890 INFO ]: ChcToBoogie initialized [2018-06-22 12:33:59,893 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:33:59" (1/1) ... [2018-06-22 12:33:59,945 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59 Unit [2018-06-22 12:33:59,945 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 12:33:59,949 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 12:33:59,949 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 12:33:59,949 INFO ]: Boogie Preprocessor initialized [2018-06-22 12:33:59,971 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:33:59,971 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:33:59,987 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:33:59,988 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:34:00,003 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:34:00,004 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:34:00,005 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (1/1) ... [2018-06-22 12:34:00,008 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 12:34:00,008 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 12:34:00,008 INFO ]: Initializing RCFGBuilder... [2018-06-22 12:34:00,008 INFO ]: RCFGBuilder initialized [2018-06-22 12:34:00,009 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (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 12:34:00,035 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 12:34:00,035 INFO ]: Found specification of procedure False [2018-06-22 12:34:00,035 INFO ]: Found implementation of procedure False [2018-06-22 12:34:00,035 INFO ]: Specification and implementation of procedure invariant given in one single declaration [2018-06-22 12:34:00,035 INFO ]: Found specification of procedure invariant [2018-06-22 12:34:00,035 INFO ]: Found implementation of procedure invariant [2018-06-22 12:34:00,036 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 12:34:00,036 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 12:34:00,036 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 12:34:00,394 INFO ]: Using library mode [2018-06-22 12:34:00,395 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:34:00 BoogieIcfgContainer [2018-06-22 12:34:00,395 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 12:34:00,396 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 12:34:00,396 INFO ]: Initializing TraceAbstraction... [2018-06-22 12:34:00,401 INFO ]: TraceAbstraction initialized [2018-06-22 12:34:00,401 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 12:33:59" (1/3) ... [2018-06-22 12:34:00,402 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406b7418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 12:34:00, skipping insertion in model container [2018-06-22 12:34:00,402 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 12:33:59" (2/3) ... [2018-06-22 12:34:00,402 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@406b7418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 12:34:00, skipping insertion in model container [2018-06-22 12:34:00,402 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 12:34:00" (3/3) ... [2018-06-22 12:34:00,404 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 12:34:00,421 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 12:34:00,430 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 12:34:00,477 INFO ]: Using default assertion order modulation [2018-06-22 12:34:00,477 INFO ]: Interprodecural is true [2018-06-22 12:34:00,477 INFO ]: Hoare is false [2018-06-22 12:34:00,477 INFO ]: Compute interpolants for FPandBP [2018-06-22 12:34:00,477 INFO ]: Backedges is TWOTRACK [2018-06-22 12:34:00,477 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 12:34:00,477 INFO ]: Difference is false [2018-06-22 12:34:00,477 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 12:34:00,477 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 12:34:00,490 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 12:34:00,500 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 12:34:00,500 INFO ]: Found error trace [2018-06-22 12:34:00,501 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:34:00,501 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:34:00,506 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 12:34:00,508 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:34:00,508 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:34:00,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:00,539 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:34:00,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:00,602 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:00,797 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 12:34:00,799 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 12:34:00,799 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 12:34:00,800 INFO ]: Interpolant automaton has 4 states [2018-06-22 12:34:00,810 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 12:34:00,811 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 12:34:00,812 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 12:34:00,931 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:34:00,931 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 12:34:00,933 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 12:34:00,934 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 12:34:00,935 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:34:00,950 INFO ]: With dead ends: 13 [2018-06-22 12:34:00,950 INFO ]: Without dead ends: 13 [2018-06-22 12:34:00,952 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 12:34:00,968 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 12:34:00,987 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 12:34:00,988 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 12:34:00,989 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 12:34:00,990 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 12:34:00,990 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:34:00,990 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 12:34:00,990 INFO ]: Interpolant automaton has 4 states. [2018-06-22 12:34:00,990 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 12:34:00,992 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 12:34:00,992 INFO ]: Found error trace [2018-06-22 12:34:00,992 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:34:00,992 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:34:00,992 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 12:34:00,992 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:34:00,992 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:34:00,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:00,993 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:34:00,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:01,122 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:02,470 WARN ]: Spent 1.08 s on a formula simplification. DAG size of input: 81 DAG size of output: 22 [2018-06-22 12:34:02,657 WARN ]: Spent 162.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 12:34:02,671 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:34:02,671 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:34:02,671 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 12:34:02,678 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:34:02,733 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:02,746 INFO ]: Computing forward predicates... [2018-06-22 12:34:22,152 WARN ]: Spent 601.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-06-22 12:34:22,539 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 12:34:22,578 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:34:22,578 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 12:34:22,578 INFO ]: Interpolant automaton has 9 states [2018-06-22 12:34:22,578 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 12:34:22,579 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 12:34:22,579 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 12:34:22,856 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2018-06-22 12:34:23,095 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:34:23,095 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 12:34:23,095 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 12:34:23,095 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 12:34:23,096 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:34:23,096 INFO ]: With dead ends: 15 [2018-06-22 12:34:23,096 INFO ]: Without dead ends: 15 [2018-06-22 12:34:23,097 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 12:34:23,097 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 12:34:23,100 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 12:34:23,100 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 12:34:23,100 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 12:34:23,100 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 12:34:23,100 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:34:23,100 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 12:34:23,101 INFO ]: Interpolant automaton has 9 states. [2018-06-22 12:34:23,101 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 12:34:23,101 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 12:34:23,101 INFO ]: Found error trace [2018-06-22 12:34:23,101 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:34:23,101 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:34:23,101 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 12:34:23,101 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:34:23,101 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:34:23,102 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:23,102 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 12:34:23,102 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:23,246 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:23,695 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 48 [2018-06-22 12:34:23,827 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:34:23,827 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:34:23,827 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 12:34:23,841 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 12:34:23,969 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 12:34:23,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:23,973 INFO ]: Computing forward predicates... [2018-06-22 12:34:37,820 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2018-06-22 12:34:50,846 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2018-06-22 12:34:51,001 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 12:34:51,025 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 12:34:51,025 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 12:34:51,025 INFO ]: Interpolant automaton has 13 states [2018-06-22 12:34:51,025 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 12:34:51,026 INFO ]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 12:34:51,026 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 12:34:51,261 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2018-06-22 12:34:51,410 WARN ]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2018-06-22 12:34:51,434 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 12:34:51,434 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 12:34:51,435 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 12:34:51,435 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 12:34:51,435 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 12:34:51,435 INFO ]: With dead ends: 17 [2018-06-22 12:34:51,436 INFO ]: Without dead ends: 17 [2018-06-22 12:34:51,436 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2018-06-22 12:34:51,436 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 12:34:51,438 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 12:34:51,438 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 12:34:51,438 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 12:34:51,438 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 12:34:51,438 INFO ]: Finished accepts. word is rejected. [2018-06-22 12:34:51,438 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 12:34:51,438 INFO ]: Interpolant automaton has 13 states. [2018-06-22 12:34:51,438 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 12:34:51,439 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 12:34:51,439 INFO ]: Found error trace [2018-06-22 12:34:51,439 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 12:34:51,439 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 12:34:51,439 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 12:34:51,439 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 12:34:51,440 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 12:34:51,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:51,440 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 12:34:51,440 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 12:34:51,561 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:52,249 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 53 [2018-06-22 12:34:52,952 WARN ]: Spent 682.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 95 [2018-06-22 12:34:53,277 WARN ]: Spent 267.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 61 [2018-06-22 12:34:53,600 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2018-06-22 12:34:53,766 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2018-06-22 12:34:53,778 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 12:34:53,778 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 12:34:53,778 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 12:34:53,784 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 12:34:53,887 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 12:34:53,887 INFO ]: Conjunction of SSA is unsat [2018-06-22 12:34:53,898 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown