java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:27:29,388 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:27:29,390 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:27:29,405 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:27:29,406 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:27:29,406 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:27:29,408 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:27:29,411 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:27:29,413 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:27:29,414 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:27:29,416 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:27:29,416 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:27:29,417 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:27:29,420 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:27:29,421 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:27:29,422 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:27:29,424 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:27:29,433 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:27:29,434 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:27:29,435 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:27:29,439 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:27:29,441 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:27:29,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:27:29,441 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:27:29,444 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:27:29,445 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:27:29,445 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:27:29,446 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:27:29,450 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:27:29,450 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:27:29,451 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:27:29,452 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:27:29,452 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:27:29,454 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:27:29,454 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:27:29,455 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:27:29,468 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:27:29,468 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:27:29,469 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:27:29,469 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:27:29,470 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:27:29,470 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:27:29,470 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:27:29,471 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:27:29,471 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:27:29,472 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:27:29,472 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:27:29,472 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:27:29,472 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:27:29,472 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:27:29,472 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:27:29,473 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:27:29,473 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:27:29,474 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:27:29,475 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:27:29,527 INFO ]: Repository-Root is: /tmp [2018-06-22 05:27:29,547 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:27:29,551 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:27:29,553 INFO ]: Initializing SmtParser... [2018-06-22 05:27:29,553 INFO ]: SmtParser initialized [2018-06-22 05:27:29,554 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 [2018-06-22 05:27:29,555 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 05:27:29,652 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 unknown [2018-06-22 05:27:29,856 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/gulwani_fig1a.c.smt2 [2018-06-22 05:27:29,861 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:27:29,870 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:27:29,870 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:27:29,870 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:27:29,870 INFO ]: ChcToBoogie initialized [2018-06-22 05:27:29,874 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,940 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29 Unit [2018-06-22 05:27:29,940 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:27:29,941 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:27:29,941 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:27:29,941 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:27:29,964 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,964 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,971 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,972 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,975 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,977 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,978 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... [2018-06-22 05:27:29,982 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:27:29,983 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:27:29,983 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:27:29,983 INFO ]: RCFGBuilder initialized [2018-06-22 05:27:29,984 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 05:27:30,002 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:27:30,002 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:27:30,002 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:27:30,002 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:27:30,002 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:27:30,002 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:27:30,271 INFO ]: Using library mode [2018-06-22 05:27:30,272 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:27:30 BoogieIcfgContainer [2018-06-22 05:27:30,272 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:27:30,275 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:27:30,275 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:27:30,279 INFO ]: TraceAbstraction initialized [2018-06-22 05:27:30,279 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:27:29" (1/3) ... [2018-06-22 05:27:30,280 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c9e542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:27:30, skipping insertion in model container [2018-06-22 05:27:30,280 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:27:29" (2/3) ... [2018-06-22 05:27:30,281 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c9e542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:27:30, skipping insertion in model container [2018-06-22 05:27:30,281 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:27:30" (3/3) ... [2018-06-22 05:27:30,284 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:27:30,295 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:27:30,308 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:27:30,356 INFO ]: Using default assertion order modulation [2018-06-22 05:27:30,357 INFO ]: Interprodecural is true [2018-06-22 05:27:30,357 INFO ]: Hoare is false [2018-06-22 05:27:30,357 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:27:30,357 INFO ]: Backedges is TWOTRACK [2018-06-22 05:27:30,357 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:27:30,357 INFO ]: Difference is false [2018-06-22 05:27:30,357 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:27:30,357 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:27:30,375 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:27:30,391 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:27:30,391 INFO ]: Found error trace [2018-06-22 05:27:30,396 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:30,396 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:30,401 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:27:30,402 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:30,402 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:30,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:30,444 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:30,444 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:30,484 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:30,569 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:30,574 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:27:30,574 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:27:30,576 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:27:30,595 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:27:30,595 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:27:30,598 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:27:30,690 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:30,690 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:27:30,691 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:27:30,693 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:27:30,693 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:30,701 INFO ]: With dead ends: 9 [2018-06-22 05:27:30,701 INFO ]: Without dead ends: 9 [2018-06-22 05:27:30,703 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:27:30,717 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:27:30,742 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:27:30,743 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:27:30,744 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:27:30,746 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:27:30,746 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:30,746 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:27:30,746 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:27:30,746 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:27:30,747 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:27:30,747 INFO ]: Found error trace [2018-06-22 05:27:30,747 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:30,747 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:30,747 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:27:30,747 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:30,747 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:30,748 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:30,748 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:30,748 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:30,769 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:30,918 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:30,918 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:30,918 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:30,926 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:30,967 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:30,977 INFO ]: Computing forward predicates... [2018-06-22 05:27:31,415 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:31,438 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:31,438 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:27:31,438 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:27:31,439 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:27:31,439 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:27:31,439 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:27:31,507 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:31,507 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:27:31,508 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:27:31,508 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:27:31,508 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:31,508 INFO ]: With dead ends: 10 [2018-06-22 05:27:31,508 INFO ]: Without dead ends: 10 [2018-06-22 05:27:31,509 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:27:31,509 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:27:31,512 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:27:31,512 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:27:31,512 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:27:31,513 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:27:31,513 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:31,513 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:27:31,513 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:27:31,513 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:27:31,513 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:27:31,513 INFO ]: Found error trace [2018-06-22 05:27:31,513 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:31,513 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:31,514 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:27:31,514 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:31,514 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:31,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:31,515 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:31,515 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:31,555 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:31,876 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:31,876 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:31,876 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:31,884 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:27:31,943 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:27:31,943 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:31,946 INFO ]: Computing forward predicates... [2018-06-22 05:27:33,389 WARN ]: Spent 541.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 6 [2018-06-22 05:27:33,460 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:33,481 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:33,481 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 05:27:33,482 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:27:33,482 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:27:33,482 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:27:33,482 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 05:27:33,830 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:33,830 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:27:33,830 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:27:33,830 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 05:27:33,830 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:33,830 INFO ]: With dead ends: 11 [2018-06-22 05:27:33,830 INFO ]: Without dead ends: 11 [2018-06-22 05:27:33,831 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:27:33,831 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:27:33,832 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:27:33,832 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:27:33,832 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:27:33,832 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:27:33,832 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:33,832 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:27:33,832 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:27:33,832 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:27:33,832 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:27:33,833 INFO ]: Found error trace [2018-06-22 05:27:33,833 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:33,833 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:33,833 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:27:33,833 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:33,833 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:33,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:33,834 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:33,834 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:33,885 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:34,012 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:34,013 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:34,013 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 05:27:34,020 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:27:34,081 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:27:34,081 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:34,083 INFO ]: Computing forward predicates... [2018-06-22 05:27:34,333 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:34,356 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:34,356 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-22 05:27:34,357 INFO ]: Interpolant automaton has 7 states [2018-06-22 05:27:34,357 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 05:27:34,357 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-22 05:27:34,357 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 7 states. [2018-06-22 05:27:34,566 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:34,567 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:27:34,567 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:27:34,567 INFO ]: Start accepts. Automaton has 7 states. Word has length 10 [2018-06-22 05:27:34,567 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:34,567 INFO ]: With dead ends: 12 [2018-06-22 05:27:34,567 INFO ]: Without dead ends: 12 [2018-06-22 05:27:34,568 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:27:34,568 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:27:34,569 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:27:34,569 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:27:34,570 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:27:34,570 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:27:34,570 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:34,570 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:27:34,570 INFO ]: Interpolant automaton has 7 states. [2018-06-22 05:27:34,570 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:27:34,570 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:27:34,570 INFO ]: Found error trace [2018-06-22 05:27:34,570 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:34,570 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:34,571 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:27:34,571 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:34,571 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:34,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:34,571 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:34,571 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:34,619 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:34,739 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:34,739 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:34,739 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 05:27:34,749 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:27:34,774 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:27:34,774 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:34,776 INFO ]: Computing forward predicates... [2018-06-22 05:27:35,124 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:35,147 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:35,147 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:27:35,147 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:27:35,148 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:27:35,148 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:27:35,148 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:27:35,292 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:35,292 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:27:35,292 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:27:35,292 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:27:35,293 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:35,293 INFO ]: With dead ends: 13 [2018-06-22 05:27:35,293 INFO ]: Without dead ends: 13 [2018-06-22 05:27:35,293 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:27:35,294 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:27:35,295 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:27:35,295 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:27:35,295 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:27:35,295 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:27:35,295 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:35,295 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:27:35,295 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:27:35,295 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:27:35,296 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:27:35,296 INFO ]: Found error trace [2018-06-22 05:27:35,296 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:35,296 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:35,296 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:27:35,296 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:35,296 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:35,297 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:35,297 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:35,297 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:35,317 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:35,440 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:35,440 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:35,440 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 [2018-06-22 05:27:35,446 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:27:35,526 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:27:35,526 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:35,532 INFO ]: Computing forward predicates... [2018-06-22 05:27:39,063 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:39,084 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:39,084 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:27:39,084 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:27:39,084 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:27:39,084 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:27:39,084 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:27:39,260 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:39,260 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:27:39,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:27:39,260 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:27:39,260 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:39,260 INFO ]: With dead ends: 14 [2018-06-22 05:27:39,260 INFO ]: Without dead ends: 14 [2018-06-22 05:27:39,261 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:27:39,261 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:27:39,262 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:27:39,262 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:27:39,263 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:27:39,263 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:27:39,263 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:39,263 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:27:39,263 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:27:39,263 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:27:39,263 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:27:39,263 INFO ]: Found error trace [2018-06-22 05:27:39,263 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:39,263 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:39,264 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:27:39,264 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:39,264 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:39,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:39,265 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:39,265 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:39,293 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:39,437 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:39,437 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:39,437 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:39,444 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:27:39,469 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:27:39,469 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:39,472 INFO ]: Computing forward predicates... [2018-06-22 05:27:41,039 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:41,073 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:41,073 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-22 05:27:41,073 INFO ]: Interpolant automaton has 10 states [2018-06-22 05:27:41,073 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 05:27:41,073 INFO ]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-22 05:27:41,074 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-22 05:27:41,519 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:41,519 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:27:41,519 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:27:41,519 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 05:27:41,519 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:41,519 INFO ]: With dead ends: 15 [2018-06-22 05:27:41,519 INFO ]: Without dead ends: 15 [2018-06-22 05:27:41,520 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:27:41,520 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:27:41,521 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:27:41,521 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:27:41,521 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:27:41,522 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:27:41,522 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:41,522 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:27:41,522 INFO ]: Interpolant automaton has 10 states. [2018-06-22 05:27:41,522 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:27:41,522 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:27:41,522 INFO ]: Found error trace [2018-06-22 05:27:41,522 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:41,522 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:41,522 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:27:41,522 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:41,522 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:41,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:41,523 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:41,523 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:41,580 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:41,807 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:41,808 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:41,808 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:41,828 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:41,854 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:41,857 INFO ]: Computing forward predicates... [2018-06-22 05:27:43,871 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 05:27:44,071 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:44,098 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:44,149 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 05:27:44,150 INFO ]: Interpolant automaton has 14 states [2018-06-22 05:27:44,150 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 05:27:44,150 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:27:44,150 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-06-22 05:27:44,563 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 24 [2018-06-22 05:27:44,698 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:44,698 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 05:27:44,698 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 05:27:44,698 INFO ]: Start accepts. Automaton has 14 states. Word has length 14 [2018-06-22 05:27:44,698 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:44,698 INFO ]: With dead ends: 16 [2018-06-22 05:27:44,698 INFO ]: Without dead ends: 16 [2018-06-22 05:27:44,699 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:27:44,699 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 05:27:44,700 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 05:27:44,700 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 05:27:44,701 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 05:27:44,701 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-22 05:27:44,701 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:44,701 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 05:27:44,701 INFO ]: Interpolant automaton has 14 states. [2018-06-22 05:27:44,701 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 05:27:44,701 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 05:27:44,701 INFO ]: Found error trace [2018-06-22 05:27:44,701 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:44,702 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:44,702 INFO ]: Analyzing trace with hash 1051911180, now seen corresponding path program 8 times [2018-06-22 05:27:44,702 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:44,702 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:44,702 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:44,702 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:27:44,702 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:44,746 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:45,309 WARN ]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:27:45,752 WARN ]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 05:27:45,968 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:45,968 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:45,968 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 05:27:45,983 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:46,029 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:27:46,029 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:46,032 INFO ]: Computing forward predicates... [2018-06-22 05:27:51,027 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:51,048 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:51,049 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-22 05:27:51,049 INFO ]: Interpolant automaton has 15 states [2018-06-22 05:27:51,049 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 05:27:51,049 INFO ]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:27:51,049 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-06-22 05:27:51,308 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 24 [2018-06-22 05:27:51,586 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:51,586 INFO ]: Finished difference Result 17 states and 17 transitions. [2018-06-22 05:27:51,586 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 05:27:51,586 INFO ]: Start accepts. Automaton has 15 states. Word has length 15 [2018-06-22 05:27:51,586 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:51,587 INFO ]: With dead ends: 17 [2018-06-22 05:27:51,587 INFO ]: Without dead ends: 17 [2018-06-22 05:27:51,587 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2018-06-22 05:27:51,587 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 05:27:51,589 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 05:27:51,589 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 05:27:51,589 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-06-22 05:27:51,589 INFO ]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-06-22 05:27:51,590 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:51,590 INFO ]: Abstraction has 17 states and 17 transitions. [2018-06-22 05:27:51,590 INFO ]: Interpolant automaton has 15 states. [2018-06-22 05:27:51,590 INFO ]: Start isEmpty. Operand 17 states and 17 transitions. [2018-06-22 05:27:51,590 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 05:27:51,590 INFO ]: Found error trace [2018-06-22 05:27:51,590 INFO ]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:51,590 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:51,591 INFO ]: Analyzing trace with hash -1752374252, now seen corresponding path program 9 times [2018-06-22 05:27:51,591 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:51,591 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:51,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:51,591 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:51,591 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:51,640 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:51,883 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:51,883 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:51,883 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:51,890 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:27:51,948 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-22 05:27:51,949 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:51,952 INFO ]: Computing forward predicates... [2018-06-22 05:27:53,561 INFO ]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:53,581 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:27:53,581 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 05:27:53,582 INFO ]: Interpolant automaton has 16 states [2018-06-22 05:27:53,582 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 05:27:53,582 INFO ]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-06-22 05:27:53,582 INFO ]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-06-22 05:27:54,118 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:27:54,118 INFO ]: Finished difference Result 18 states and 18 transitions. [2018-06-22 05:27:54,118 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 05:27:54,118 INFO ]: Start accepts. Automaton has 16 states. Word has length 16 [2018-06-22 05:27:54,118 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:27:54,119 INFO ]: With dead ends: 18 [2018-06-22 05:27:54,119 INFO ]: Without dead ends: 18 [2018-06-22 05:27:54,119 INFO ]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=203, Invalid=447, Unknown=0, NotChecked=0, Total=650 [2018-06-22 05:27:54,119 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-22 05:27:54,121 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-22 05:27:54,121 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-22 05:27:54,122 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-06-22 05:27:54,122 INFO ]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-06-22 05:27:54,122 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:27:54,122 INFO ]: Abstraction has 18 states and 18 transitions. [2018-06-22 05:27:54,122 INFO ]: Interpolant automaton has 16 states. [2018-06-22 05:27:54,122 INFO ]: Start isEmpty. Operand 18 states and 18 transitions. [2018-06-22 05:27:54,122 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 05:27:54,122 INFO ]: Found error trace [2018-06-22 05:27:54,122 INFO ]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:27:54,122 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:27:54,123 INFO ]: Analyzing trace with hash 1509090572, now seen corresponding path program 10 times [2018-06-22 05:27:54,123 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:27:54,123 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:27:54,123 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:54,123 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:27:54,123 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:27:54,167 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:54,695 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 4 [2018-06-22 05:27:55,096 WARN ]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:27:55,267 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:27:55,267 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:27:55,267 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:27:55,274 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:27:55,311 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:27:55,311 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:27:55,314 INFO ]: Computing forward predicates... [2018-06-22 05:28:03,910 INFO ]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:28:04,028 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:28:04,028 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2018-06-22 05:28:04,029 INFO ]: Interpolant automaton has 17 states [2018-06-22 05:28:04,029 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 05:28:04,029 INFO ]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2018-06-22 05:28:04,029 INFO ]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-06-22 05:28:04,683 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:28:04,683 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-22 05:28:04,683 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 05:28:04,683 INFO ]: Start accepts. Automaton has 17 states. Word has length 17 [2018-06-22 05:28:04,684 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:28:04,684 INFO ]: With dead ends: 19 [2018-06-22 05:28:04,684 INFO ]: Without dead ends: 19 [2018-06-22 05:28:04,685 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2018-06-22 05:28:04,685 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 05:28:04,687 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 05:28:04,687 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 05:28:04,687 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-06-22 05:28:04,687 INFO ]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-06-22 05:28:04,687 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:28:04,687 INFO ]: Abstraction has 19 states and 19 transitions. [2018-06-22 05:28:04,687 INFO ]: Interpolant automaton has 17 states. [2018-06-22 05:28:04,687 INFO ]: Start isEmpty. Operand 19 states and 19 transitions. [2018-06-22 05:28:04,688 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 05:28:04,688 INFO ]: Found error trace [2018-06-22 05:28:04,688 INFO ]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:28:04,688 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:28:04,688 INFO ]: Analyzing trace with hash -464714988, now seen corresponding path program 11 times [2018-06-22 05:28:04,688 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:28:04,688 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:28:04,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:28:04,689 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:28:04,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:28:04,741 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:28:05,184 WARN ]: Spent 194.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 16 [2018-06-22 05:28:05,435 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:28:05,435 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:28:05,435 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:28:05,443 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:28:05,486 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 05:28:05,486 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:28:05,490 INFO ]: Computing forward predicates... [2018-06-22 05:28:07,213 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 12 [2018-06-22 05:28:07,534 INFO ]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:28:07,556 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:28:07,556 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 05:28:07,557 INFO ]: Interpolant automaton has 22 states [2018-06-22 05:28:07,557 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 05:28:07,557 INFO ]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2018-06-22 05:28:07,557 INFO ]: Start difference. First operand 19 states and 19 transitions. Second operand 22 states. [2018-06-22 05:28:07,727 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 7 [2018-06-22 05:28:07,951 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 30 [2018-06-22 05:28:07,972 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:28:07,972 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:28:07,976 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:28:07,976 INFO ]: Start accepts. Automaton has 22 states. Word has length 18 [2018-06-22 05:28:07,976 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:28:07,976 INFO ]: With dead ends: 15 [2018-06-22 05:28:07,976 INFO ]: Without dead ends: 0 [2018-06-22 05:28:07,977 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2018-06-22 05:28:07,977 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 05:28:07,977 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 05:28:07,977 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 05:28:07,977 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 05:28:07,977 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-22 05:28:07,977 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:28:07,977 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 05:28:07,977 INFO ]: Interpolant automaton has 22 states. [2018-06-22 05:28:07,977 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 05:28:07,977 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 05:28:08,000 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:28:08 BoogieIcfgContainer [2018-06-22 05:28:08,000 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:28:08,004 INFO ]: Toolchain (without parser) took 38141.76 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 258.4 MB in the beginning and 433.7 MB in the end (delta: -175.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 05:28:08,005 INFO ]: SmtParser took 0.13 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:28:08,005 INFO ]: ChcToBoogie took 70.18 ms. Allocated memory is still 303.0 MB. Free memory was 258.4 MB in the beginning and 256.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:28:08,006 INFO ]: Boogie Preprocessor took 41.09 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 254.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:28:08,006 INFO ]: RCFGBuilder took 289.25 ms. Allocated memory is still 303.0 MB. Free memory was 254.5 MB in the beginning and 246.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:28:08,007 INFO ]: TraceAbstraction took 37725.21 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.5 MB in the beginning and 433.7 MB in the end (delta: -187.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. [2018-06-22 05:28:08,011 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.13 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 70.18 ms. Allocated memory is still 303.0 MB. Free memory was 258.4 MB in the beginning and 256.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.09 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 254.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 289.25 ms. Allocated memory is still 303.0 MB. Free memory was 254.5 MB in the beginning and 246.5 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 37725.21 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 246.5 MB in the beginning and 433.7 MB in the end (delta: -187.3 MB). Peak memory consumption was 1.0 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 37.6s OverallTime, 12 OverallIterations, 11 TraceHistogramMax, 4.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 28 SDslu, 341 SDs, 0 SdLazy, 115 SolverSat, 78 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 300 GetRequests, 85 SyntacticMatches, 40 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 11.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=11, 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, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 31.6s InterpolantComputationTime, 293 NumberOfCodeBlocks, 293 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 270 ConstructedInterpolants, 0 QuantifiedInterpolants, 22568 SizeOfPredicates, 44 NumberOfNonLiveVariables, 1705 ConjunctsInSsa, 499 ConjunctsInUnsatCore, 23 InterpolantComputations, 1 PerfectInterpolantSequences, 0/572 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-28-08-021.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/gulwani_fig1a.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-28-08-021.csv Received shutdown request...