java -Xss4m -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/ctigar/dillig19.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 12:54:01,452 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 12:54:01,455 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 12:54:01,469 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 12:54:01,470 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 12:54:01,471 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 12:54:01,475 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 12:54:01,477 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 12:54:01,479 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 12:54:01,480 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 12:54:01,481 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 12:54:01,481 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 12:54:01,482 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 12:54:01,485 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 12:54:01,486 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 12:54:01,487 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 12:54:01,500 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 12:54:01,502 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 12:54:01,503 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 12:54:01,504 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 12:54:01,505 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 12:54:01,511 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 12:54:01,511 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 12:54:01,511 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 12:54:01,512 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 12:54:01,515 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 12:54:01,516 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 12:54:01,517 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 12:54:01,518 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 12:54:01,518 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 12:54:01,519 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 12:54:01,523 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 12:54:01,524 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 12:54:01,524 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 12:54:01,525 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 12:54:01,525 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 12:54:01,547 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 12:54:01,548 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 12:54:01,548 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 12:54:01,548 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 12:54:01,551 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 12:54:01,552 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 12:54:01,552 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 12:54:01,552 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 12:54:01,552 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 12:54:01,552 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 12:54:01,553 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 12:54:01,553 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 12:54:01,553 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 12:54:01,553 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 12:54:01,553 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 12:54:01,554 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 12:54:01,555 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 12:54:01,555 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 12:54:01,555 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 12:54:01,555 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 12:54:01,556 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 12:54:01,557 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 12:54:01,557 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 12:54:01,611 INFO ]: Repository-Root is: /tmp [2018-06-25 12:54:01,629 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 12:54:01,636 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 12:54:01,745 INFO ]: Initializing SmtParser... [2018-06-25 12:54:01,746 INFO ]: SmtParser initialized [2018-06-25 12:54:01,746 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 [2018-06-25 12:54:01,748 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 [2018-06-25 12:54:01,836 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 unknown [2018-06-25 12:54:02,349 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 [2018-06-25 12:54:02,353 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 12:54:02,360 INFO ]: Walking toolchain with 4 elements. [2018-06-25 12:54:02,360 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 12:54:02,360 INFO ]: Initializing ChcToBoogie... [2018-06-25 12:54:02,360 INFO ]: ChcToBoogie initialized [2018-06-25 12:54:02,364 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,427 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02 Unit [2018-06-25 12:54:02,427 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 12:54:02,428 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 12:54:02,428 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 12:54:02,428 INFO ]: Boogie Preprocessor initialized [2018-06-25 12:54:02,448 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,448 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,455 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,456 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,473 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,475 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,476 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (1/1) ... [2018-06-25 12:54:02,478 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 12:54:02,478 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 12:54:02,478 INFO ]: Initializing RCFGBuilder... [2018-06-25 12:54:02,478 INFO ]: RCFGBuilder initialized [2018-06-25 12:54:02,479 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (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) [2018-06-25 12:54:02,500 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 12:54:02,500 INFO ]: Found specification of procedure gotoProc [2018-06-25 12:54:02,500 INFO ]: Found implementation of procedure gotoProc [2018-06-25 12:54:02,500 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 12:54:02,500 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 12:54:02,500 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 [2018-06-25 12:54:02,789 INFO ]: Using library mode [2018-06-25 12:54:02,790 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:54:02 BoogieIcfgContainer [2018-06-25 12:54:02,790 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 12:54:02,791 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 12:54:02,791 INFO ]: Initializing TraceAbstraction... [2018-06-25 12:54:02,795 INFO ]: TraceAbstraction initialized [2018-06-25 12:54:02,796 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 12:54:02" (1/3) ... [2018-06-25 12:54:02,796 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0f2f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 12:54:02, skipping insertion in model container [2018-06-25 12:54:02,796 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 12:54:02" (2/3) ... [2018-06-25 12:54:02,797 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e0f2f3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 12:54:02, skipping insertion in model container [2018-06-25 12:54:02,797 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 12:54:02" (3/3) ... [2018-06-25 12:54:02,800 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 12:54:02,809 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 12:54:02,821 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 12:54:02,873 INFO ]: Using default assertion order modulation [2018-06-25 12:54:02,874 INFO ]: Interprodecural is true [2018-06-25 12:54:02,874 INFO ]: Hoare is false [2018-06-25 12:54:02,876 INFO ]: Compute interpolants for FPandBP [2018-06-25 12:54:02,876 INFO ]: Backedges is TWOTRACK [2018-06-25 12:54:02,876 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 12:54:02,876 INFO ]: Difference is false [2018-06-25 12:54:02,876 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 12:54:02,876 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 12:54:02,895 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 12:54:02,912 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 12:54:02,912 INFO ]: Found error trace [2018-06-25 12:54:02,913 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:02,913 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:02,919 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 12:54:02,922 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:02,922 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:02,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:02,975 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:02,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:03,023 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:03,120 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:03,122 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 12:54:03,122 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 12:54:03,124 INFO ]: Interpolant automaton has 3 states [2018-06-25 12:54:03,140 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 12:54:03,141 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 12:54:03,144 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 12:54:03,234 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:03,235 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 12:54:03,236 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 12:54:03,237 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 12:54:03,237 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:03,249 INFO ]: With dead ends: 9 [2018-06-25 12:54:03,249 INFO ]: Without dead ends: 9 [2018-06-25 12:54:03,253 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 [2018-06-25 12:54:03,273 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 12:54:03,287 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 12:54:03,288 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 12:54:03,289 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 12:54:03,290 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 12:54:03,290 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:03,290 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 12:54:03,290 INFO ]: Interpolant automaton has 3 states. [2018-06-25 12:54:03,290 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 12:54:03,290 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 12:54:03,290 INFO ]: Found error trace [2018-06-25 12:54:03,290 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:03,290 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:03,291 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 12:54:03,291 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:03,291 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:03,292 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:03,292 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:03,292 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:03,361 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:03,563 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:03,564 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:03,564 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 [2018-06-25 12:54:03,574 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:03,637 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:03,647 INFO ]: Computing forward predicates... [2018-06-25 12:54:04,192 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:04,213 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:04,213 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 12:54:04,214 INFO ]: Interpolant automaton has 5 states [2018-06-25 12:54:04,214 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 12:54:04,214 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 12:54:04,214 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 12:54:04,421 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:04,422 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 12:54:04,422 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-25 12:54:04,422 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 12:54:04,422 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:04,423 INFO ]: With dead ends: 10 [2018-06-25 12:54:04,423 INFO ]: Without dead ends: 10 [2018-06-25 12:54:04,423 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:54:04,424 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 12:54:04,425 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 12:54:04,425 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 12:54:04,425 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 12:54:04,425 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 12:54:04,425 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:04,425 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 12:54:04,425 INFO ]: Interpolant automaton has 5 states. [2018-06-25 12:54:04,425 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 12:54:04,425 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 12:54:04,425 INFO ]: Found error trace [2018-06-25 12:54:04,425 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:04,426 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:04,427 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 12:54:04,427 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:04,427 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:04,428 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:04,428 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 12:54:04,428 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:04,499 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:04,762 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 12:54:04,763 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:04,763 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:04,763 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 [2018-06-25 12:54:04,771 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 12:54:04,836 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 12:54:04,836 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:04,839 INFO ]: Computing forward predicates... [2018-06-25 12:54:05,330 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:05,362 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:05,362 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 12:54:05,362 INFO ]: Interpolant automaton has 6 states [2018-06-25 12:54:05,362 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 12:54:05,362 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 12:54:05,362 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 12:54:05,730 WARN ]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 12:54:05,740 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:05,740 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 12:54:05,740 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 12:54:05,740 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 12:54:05,740 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:05,740 INFO ]: With dead ends: 12 [2018-06-25 12:54:05,740 INFO ]: Without dead ends: 12 [2018-06-25 12:54:05,741 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-25 12:54:05,741 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 12:54:05,742 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 12:54:05,742 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 12:54:05,742 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 12:54:05,742 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 12:54:05,742 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:05,742 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 12:54:05,743 INFO ]: Interpolant automaton has 6 states. [2018-06-25 12:54:05,743 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 12:54:05,743 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 12:54:05,743 INFO ]: Found error trace [2018-06-25 12:54:05,743 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:05,743 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:05,743 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 3 times [2018-06-25 12:54:05,743 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:05,743 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:05,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:05,744 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:54:05,744 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:05,809 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:06,231 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-25 12:54:06,399 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:06,399 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:06,399 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 [2018-06-25 12:54:06,407 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 12:54:06,484 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 12:54:06,484 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:06,489 INFO ]: Computing forward predicates... [2018-06-25 12:54:29,811 WARN ]: Spent 249.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 5 [2018-06-25 12:54:31,228 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:31,254 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:31,254 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-25 12:54:31,254 INFO ]: Interpolant automaton has 9 states [2018-06-25 12:54:31,254 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-25 12:54:31,254 INFO ]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-06-25 12:54:31,255 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-25 12:54:31,443 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:31,443 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 12:54:31,443 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 12:54:31,443 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-25 12:54:31,443 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:31,443 INFO ]: With dead ends: 13 [2018-06-25 12:54:31,443 INFO ]: Without dead ends: 13 [2018-06-25 12:54:31,444 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2018-06-25 12:54:31,444 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 12:54:31,445 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 12:54:31,445 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 12:54:31,446 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 12:54:31,446 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 12:54:31,446 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:31,446 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 12:54:31,446 INFO ]: Interpolant automaton has 9 states. [2018-06-25 12:54:31,446 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 12:54:31,446 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 12:54:31,446 INFO ]: Found error trace [2018-06-25 12:54:31,446 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:31,446 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:31,447 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 4 times [2018-06-25 12:54:31,447 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:31,447 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:31,447 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:31,447 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:54:31,447 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:31,484 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:31,637 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:31,637 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:31,637 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 [2018-06-25 12:54:31,645 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 12:54:31,700 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 12:54:31,700 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:31,704 INFO ]: Computing forward predicates... [2018-06-25 12:54:36,522 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:36,541 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 12:54:36,542 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-25 12:54:36,542 INFO ]: Interpolant automaton has 10 states [2018-06-25 12:54:36,542 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 12:54:36,542 INFO ]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-25 12:54:36,542 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states. [2018-06-25 12:54:36,697 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 12:54:36,697 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 12:54:36,697 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 12:54:36,697 INFO ]: Start accepts. Automaton has 10 states. Word has length 12 [2018-06-25 12:54:36,697 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 12:54:36,697 INFO ]: With dead ends: 15 [2018-06-25 12:54:36,697 INFO ]: Without dead ends: 15 [2018-06-25 12:54:36,697 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2018-06-25 12:54:36,697 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 12:54:36,699 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 12:54:36,699 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 12:54:36,699 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 12:54:36,699 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-25 12:54:36,699 INFO ]: Finished accepts. word is rejected. [2018-06-25 12:54:36,699 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 12:54:36,699 INFO ]: Interpolant automaton has 10 states. [2018-06-25 12:54:36,699 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 12:54:36,699 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 12:54:36,700 INFO ]: Found error trace [2018-06-25 12:54:36,700 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 12:54:36,700 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 12:54:36,700 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 5 times [2018-06-25 12:54:36,700 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 12:54:36,700 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 12:54:36,700 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:36,700 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 12:54:36,700 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 12:54:36,787 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:37,728 WARN ]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-25 12:54:37,933 WARN ]: Spent 128.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 9 [2018-06-25 12:54:38,055 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 12:54:38,055 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 12:54:38,055 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 12:54:38,061 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 12:54:38,131 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-25 12:54:38,131 INFO ]: Conjunction of SSA is unsat [2018-06-25 12:54:38,135 INFO ]: Computing forward predicates... [2018-06-25 12:54:43,814 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 12:54:43,942 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 12:54:44,012 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown