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/eldarica-misc/LIA/llreve/while_after_while_if_merged_safe.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 01:17:26,451 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 01:17:26,453 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 01:17:26,462 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 01:17:26,463 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 01:17:26,464 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 01:17:26,465 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 01:17:26,466 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 01:17:26,468 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 01:17:26,469 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 01:17:26,469 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 01:17:26,470 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 01:17:26,470 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 01:17:26,471 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 01:17:26,472 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 01:17:26,473 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 01:17:26,475 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 01:17:26,477 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 01:17:26,478 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 01:17:26,479 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 01:17:26,480 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 01:17:26,482 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 01:17:26,483 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 01:17:26,483 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 01:17:26,484 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 01:17:26,485 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 01:17:26,485 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 01:17:26,486 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 01:17:26,487 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 01:17:26,487 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 01:17:26,488 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 01:17:26,489 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 01:17:26,489 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 01:17:26,490 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 01:17:26,490 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 01:17:26,491 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 01:17:26,504 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 01:17:26,504 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 01:17:26,504 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 01:17:26,505 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 01:17:26,506 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 01:17:26,506 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 01:17:26,506 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 01:17:26,506 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 01:17:26,506 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 01:17:26,506 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 01:17:26,507 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 01:17:26,507 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 01:17:26,507 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 01:17:26,507 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 01:17:26,507 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 01:17:26,508 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 01:17:26,508 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 01:17:26,509 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 01:17:26,509 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 01:17:26,561 INFO ]: Repository-Root is: /tmp [2018-06-22 01:17:26,575 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 01:17:26,581 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 01:17:26,582 INFO ]: Initializing SmtParser... [2018-06-22 01:17:26,582 INFO ]: SmtParser initialized [2018-06-22 01:17:26,583 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/while_after_while_if_merged_safe.c-1.smt2 [2018-06-22 01:17:26,584 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 01:17:26,659 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while_after_while_if_merged_safe.c-1.smt2 unknown [2018-06-22 01:17:26,904 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/while_after_while_if_merged_safe.c-1.smt2 [2018-06-22 01:17:26,910 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 01:17:26,915 INFO ]: Walking toolchain with 4 elements. [2018-06-22 01:17:26,916 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 01:17:26,916 INFO ]: Initializing ChcToBoogie... [2018-06-22 01:17:26,916 INFO ]: ChcToBoogie initialized [2018-06-22 01:17:26,920 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:26,977 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26 Unit [2018-06-22 01:17:26,977 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 01:17:26,978 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 01:17:26,978 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 01:17:26,978 INFO ]: Boogie Preprocessor initialized [2018-06-22 01:17:26,998 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:26,998 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,007 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,007 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,012 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,015 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,016 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (1/1) ... [2018-06-22 01:17:27,019 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 01:17:27,019 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 01:17:27,020 INFO ]: Initializing RCFGBuilder... [2018-06-22 01:17:27,020 INFO ]: RCFGBuilder initialized [2018-06-22 01:17:27,020 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (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 01:17:27,039 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 01:17:27,039 INFO ]: Found specification of procedure gotoProc [2018-06-22 01:17:27,040 INFO ]: Found implementation of procedure gotoProc [2018-06-22 01:17:27,040 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 01:17:27,040 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 01:17:27,040 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 01:17:27,440 INFO ]: Using library mode [2018-06-22 01:17:27,440 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:17:27 BoogieIcfgContainer [2018-06-22 01:17:27,440 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 01:17:27,442 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 01:17:27,442 INFO ]: Initializing TraceAbstraction... [2018-06-22 01:17:27,445 INFO ]: TraceAbstraction initialized [2018-06-22 01:17:27,445 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 01:17:26" (1/3) ... [2018-06-22 01:17:27,446 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c5c66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 01:17:27, skipping insertion in model container [2018-06-22 01:17:27,446 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 01:17:26" (2/3) ... [2018-06-22 01:17:27,446 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c5c66b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 01:17:27, skipping insertion in model container [2018-06-22 01:17:27,446 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 01:17:27" (3/3) ... [2018-06-22 01:17:27,448 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 01:17:27,462 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 01:17:27,475 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 01:17:27,536 INFO ]: Using default assertion order modulation [2018-06-22 01:17:27,536 INFO ]: Interprodecural is true [2018-06-22 01:17:27,536 INFO ]: Hoare is false [2018-06-22 01:17:27,537 INFO ]: Compute interpolants for FPandBP [2018-06-22 01:17:27,537 INFO ]: Backedges is TWOTRACK [2018-06-22 01:17:27,537 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 01:17:27,537 INFO ]: Difference is false [2018-06-22 01:17:27,537 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 01:17:27,537 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 01:17:27,553 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 01:17:27,567 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 01:17:27,567 INFO ]: Found error trace [2018-06-22 01:17:27,568 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:27,569 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:27,574 INFO ]: Analyzing trace with hash -1679438790, now seen corresponding path program 1 times [2018-06-22 01:17:27,576 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:27,577 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:27,608 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:27,608 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:27,608 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:27,652 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:27,857 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:27,858 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:27,858 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 01:17:27,861 INFO ]: Interpolant automaton has 7 states [2018-06-22 01:17:27,871 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 01:17:27,872 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:27,874 INFO ]: Start difference. First operand 15 states. Second operand 7 states. [2018-06-22 01:17:28,330 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:28,330 INFO ]: Finished difference Result 32 states and 50 transitions. [2018-06-22 01:17:28,331 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:17:28,333 INFO ]: Start accepts. Automaton has 7 states. Word has length 11 [2018-06-22 01:17:28,333 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:28,347 INFO ]: With dead ends: 32 [2018-06-22 01:17:28,347 INFO ]: Without dead ends: 31 [2018-06-22 01:17:28,349 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2018-06-22 01:17:28,368 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 01:17:28,391 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 16. [2018-06-22 01:17:28,394 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 01:17:28,395 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2018-06-22 01:17:28,396 INFO ]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 11 [2018-06-22 01:17:28,396 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:28,396 INFO ]: Abstraction has 16 states and 25 transitions. [2018-06-22 01:17:28,397 INFO ]: Interpolant automaton has 7 states. [2018-06-22 01:17:28,397 INFO ]: Start isEmpty. Operand 16 states and 25 transitions. [2018-06-22 01:17:28,397 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:17:28,398 INFO ]: Found error trace [2018-06-22 01:17:28,398 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:28,398 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:28,398 INFO ]: Analyzing trace with hash -292465600, now seen corresponding path program 1 times [2018-06-22 01:17:28,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:28,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:28,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:28,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:28,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:28,421 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:28,489 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:28,490 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:28,490 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:17:28,491 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:17:28,491 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:17:28,491 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:17:28,491 INFO ]: Start difference. First operand 16 states and 25 transitions. Second operand 5 states. [2018-06-22 01:17:28,604 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:28,604 INFO ]: Finished difference Result 27 states and 43 transitions. [2018-06-22 01:17:28,604 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:17:28,604 INFO ]: Start accepts. Automaton has 5 states. Word has length 12 [2018-06-22 01:17:28,605 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:28,605 INFO ]: With dead ends: 27 [2018-06-22 01:17:28,605 INFO ]: Without dead ends: 27 [2018-06-22 01:17:28,606 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:28,606 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 01:17:28,609 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 17. [2018-06-22 01:17:28,609 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 01:17:28,610 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 28 transitions. [2018-06-22 01:17:28,610 INFO ]: Start accepts. Automaton has 17 states and 28 transitions. Word has length 12 [2018-06-22 01:17:28,610 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:28,610 INFO ]: Abstraction has 17 states and 28 transitions. [2018-06-22 01:17:28,610 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:17:28,610 INFO ]: Start isEmpty. Operand 17 states and 28 transitions. [2018-06-22 01:17:28,610 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:17:28,610 INFO ]: Found error trace [2018-06-22 01:17:28,610 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:28,610 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:28,611 INFO ]: Analyzing trace with hash -698499320, now seen corresponding path program 1 times [2018-06-22 01:17:28,611 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:28,611 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:28,611 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:28,611 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:28,611 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:28,629 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:28,749 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:28,749 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:28,749 INFO ]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-06-22 01:17:28,750 INFO ]: Interpolant automaton has 8 states [2018-06-22 01:17:28,750 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 01:17:28,750 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 01:17:28,750 INFO ]: Start difference. First operand 17 states and 28 transitions. Second operand 8 states. [2018-06-22 01:17:28,988 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 01:17:29,294 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:29,294 INFO ]: Finished difference Result 34 states and 53 transitions. [2018-06-22 01:17:29,294 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 01:17:29,294 INFO ]: Start accepts. Automaton has 8 states. Word has length 12 [2018-06-22 01:17:29,294 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:29,295 INFO ]: With dead ends: 34 [2018-06-22 01:17:29,295 INFO ]: Without dead ends: 33 [2018-06-22 01:17:29,296 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2018-06-22 01:17:29,296 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 01:17:29,299 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 19. [2018-06-22 01:17:29,299 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 01:17:29,300 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 31 transitions. [2018-06-22 01:17:29,300 INFO ]: Start accepts. Automaton has 19 states and 31 transitions. Word has length 12 [2018-06-22 01:17:29,300 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:29,300 INFO ]: Abstraction has 19 states and 31 transitions. [2018-06-22 01:17:29,300 INFO ]: Interpolant automaton has 8 states. [2018-06-22 01:17:29,300 INFO ]: Start isEmpty. Operand 19 states and 31 transitions. [2018-06-22 01:17:29,301 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:17:29,301 INFO ]: Found error trace [2018-06-22 01:17:29,301 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:29,301 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:29,301 INFO ]: Analyzing trace with hash -587676800, now seen corresponding path program 1 times [2018-06-22 01:17:29,301 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:29,301 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:29,302 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,302 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:29,302 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,314 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:29,427 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:29,427 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:29,427 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 01:17:29,436 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:29,462 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:29,468 INFO ]: Computing forward predicates... [2018-06-22 01:17:29,524 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:29,545 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 01:17:29,545 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2018-06-22 01:17:29,545 INFO ]: Interpolant automaton has 7 states [2018-06-22 01:17:29,546 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 01:17:29,546 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:29,546 INFO ]: Start difference. First operand 19 states and 31 transitions. Second operand 7 states. [2018-06-22 01:17:29,630 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:29,630 INFO ]: Finished difference Result 29 states and 46 transitions. [2018-06-22 01:17:29,630 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:17:29,630 INFO ]: Start accepts. Automaton has 7 states. Word has length 12 [2018-06-22 01:17:29,630 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:29,631 INFO ]: With dead ends: 29 [2018-06-22 01:17:29,631 INFO ]: Without dead ends: 29 [2018-06-22 01:17:29,631 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:17:29,631 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 01:17:29,633 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 21. [2018-06-22 01:17:29,634 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 01:17:29,634 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2018-06-22 01:17:29,634 INFO ]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 12 [2018-06-22 01:17:29,634 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:29,634 INFO ]: Abstraction has 21 states and 36 transitions. [2018-06-22 01:17:29,634 INFO ]: Interpolant automaton has 7 states. [2018-06-22 01:17:29,635 INFO ]: Start isEmpty. Operand 21 states and 36 transitions. [2018-06-22 01:17:29,635 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 01:17:29,635 INFO ]: Found error trace [2018-06-22 01:17:29,635 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:29,635 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:29,635 INFO ]: Analyzing trace with hash -1846764798, now seen corresponding path program 1 times [2018-06-22 01:17:29,635 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:29,635 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:29,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,636 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:29,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,647 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:29,672 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:29,672 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:29,672 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 01:17:29,672 INFO ]: Interpolant automaton has 4 states [2018-06-22 01:17:29,672 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 01:17:29,672 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 01:17:29,673 INFO ]: Start difference. First operand 21 states and 36 transitions. Second operand 4 states. [2018-06-22 01:17:29,703 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:29,703 INFO ]: Finished difference Result 29 states and 47 transitions. [2018-06-22 01:17:29,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 01:17:29,704 INFO ]: Start accepts. Automaton has 4 states. Word has length 12 [2018-06-22 01:17:29,704 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:29,706 INFO ]: With dead ends: 29 [2018-06-22 01:17:29,706 INFO ]: Without dead ends: 29 [2018-06-22 01:17:29,706 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:17:29,706 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 01:17:29,709 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 20. [2018-06-22 01:17:29,709 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-22 01:17:29,709 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 32 transitions. [2018-06-22 01:17:29,710 INFO ]: Start accepts. Automaton has 20 states and 32 transitions. Word has length 12 [2018-06-22 01:17:29,710 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:29,710 INFO ]: Abstraction has 20 states and 32 transitions. [2018-06-22 01:17:29,710 INFO ]: Interpolant automaton has 4 states. [2018-06-22 01:17:29,710 INFO ]: Start isEmpty. Operand 20 states and 32 transitions. [2018-06-22 01:17:29,710 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:17:29,710 INFO ]: Found error trace [2018-06-22 01:17:29,710 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:29,710 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:29,710 INFO ]: Analyzing trace with hash -652003390, now seen corresponding path program 1 times [2018-06-22 01:17:29,710 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:29,710 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:29,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,711 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:29,711 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:29,722 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:29,775 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:29,775 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:29,775 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-06-22 01:17:29,775 INFO ]: Interpolant automaton has 6 states [2018-06-22 01:17:29,776 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 01:17:29,776 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-22 01:17:29,776 INFO ]: Start difference. First operand 20 states and 32 transitions. Second operand 6 states. [2018-06-22 01:17:30,046 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:30,047 INFO ]: Finished difference Result 28 states and 44 transitions. [2018-06-22 01:17:30,047 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:17:30,047 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 01:17:30,047 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:30,047 INFO ]: With dead ends: 28 [2018-06-22 01:17:30,048 INFO ]: Without dead ends: 27 [2018-06-22 01:17:30,048 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:17:30,048 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 01:17:30,050 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 22. [2018-06-22 01:17:30,050 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 01:17:30,052 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 34 transitions. [2018-06-22 01:17:30,052 INFO ]: Start accepts. Automaton has 22 states and 34 transitions. Word has length 13 [2018-06-22 01:17:30,052 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:30,052 INFO ]: Abstraction has 22 states and 34 transitions. [2018-06-22 01:17:30,052 INFO ]: Interpolant automaton has 6 states. [2018-06-22 01:17:30,052 INFO ]: Start isEmpty. Operand 22 states and 34 transitions. [2018-06-22 01:17:30,052 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:17:30,052 INFO ]: Found error trace [2018-06-22 01:17:30,052 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:30,052 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:30,053 INFO ]: Analyzing trace with hash -541180870, now seen corresponding path program 1 times [2018-06-22 01:17:30,053 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:30,053 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:30,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,053 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:30,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,090 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:30,253 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:30,253 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:30,253 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 01:17:30,262 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:30,291 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:30,294 INFO ]: Computing forward predicates... [2018-06-22 01:17:30,357 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:30,378 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:30,378 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-06-22 01:17:30,378 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:17:30,378 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:17:30,378 INFO ]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:17:30,378 INFO ]: Start difference. First operand 22 states and 34 transitions. Second operand 14 states. [2018-06-22 01:17:30,619 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:30,619 INFO ]: Finished difference Result 48 states and 73 transitions. [2018-06-22 01:17:30,619 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 01:17:30,620 INFO ]: Start accepts. Automaton has 14 states. Word has length 13 [2018-06-22 01:17:30,620 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:30,620 INFO ]: With dead ends: 48 [2018-06-22 01:17:30,620 INFO ]: Without dead ends: 47 [2018-06-22 01:17:30,621 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:17:30,621 INFO ]: Start minimizeSevpa. Operand 47 states. [2018-06-22 01:17:30,624 INFO ]: Finished minimizeSevpa. Reduced states from 47 to 26. [2018-06-22 01:17:30,624 INFO ]: Start removeUnreachable. Operand 26 states. [2018-06-22 01:17:30,625 INFO ]: Finished removeUnreachable. Reduced from 26 states to 26 states and 42 transitions. [2018-06-22 01:17:30,625 INFO ]: Start accepts. Automaton has 26 states and 42 transitions. Word has length 13 [2018-06-22 01:17:30,625 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:30,625 INFO ]: Abstraction has 26 states and 42 transitions. [2018-06-22 01:17:30,625 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:17:30,625 INFO ]: Start isEmpty. Operand 26 states and 42 transitions. [2018-06-22 01:17:30,626 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:17:30,626 INFO ]: Found error trace [2018-06-22 01:17:30,626 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:30,626 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:30,626 INFO ]: Analyzing trace with hash -125113614, now seen corresponding path program 1 times [2018-06-22 01:17:30,626 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:30,626 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:30,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,627 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:30,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,635 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:30,691 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:30,691 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:30,691 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 01:17:30,698 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:30,733 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:30,735 INFO ]: Computing forward predicates... [2018-06-22 01:17:30,784 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:30,805 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 01:17:30,805 INFO ]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7 [2018-06-22 01:17:30,805 INFO ]: Interpolant automaton has 7 states [2018-06-22 01:17:30,805 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 01:17:30,805 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:30,806 INFO ]: Start difference. First operand 26 states and 42 transitions. Second operand 7 states. [2018-06-22 01:17:30,860 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:30,860 INFO ]: Finished difference Result 44 states and 72 transitions. [2018-06-22 01:17:30,861 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:17:30,861 INFO ]: Start accepts. Automaton has 7 states. Word has length 13 [2018-06-22 01:17:30,861 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:30,862 INFO ]: With dead ends: 44 [2018-06-22 01:17:30,862 INFO ]: Without dead ends: 42 [2018-06-22 01:17:30,862 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:17:30,862 INFO ]: Start minimizeSevpa. Operand 42 states. [2018-06-22 01:17:30,865 INFO ]: Finished minimizeSevpa. Reduced states from 42 to 36. [2018-06-22 01:17:30,865 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-22 01:17:30,866 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 62 transitions. [2018-06-22 01:17:30,866 INFO ]: Start accepts. Automaton has 36 states and 62 transitions. Word has length 13 [2018-06-22 01:17:30,866 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:30,866 INFO ]: Abstraction has 36 states and 62 transitions. [2018-06-22 01:17:30,866 INFO ]: Interpolant automaton has 7 states. [2018-06-22 01:17:30,866 INFO ]: Start isEmpty. Operand 36 states and 62 transitions. [2018-06-22 01:17:30,867 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:17:30,867 INFO ]: Found error trace [2018-06-22 01:17:30,867 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:30,867 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:30,867 INFO ]: Analyzing trace with hash -1213615998, now seen corresponding path program 1 times [2018-06-22 01:17:30,867 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:30,867 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:30,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,868 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:30,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:30,875 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:30,968 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:30,968 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:30,968 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 01:17:30,976 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:31,002 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,004 INFO ]: Computing forward predicates... [2018-06-22 01:17:31,139 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,159 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-22 01:17:31,159 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 9 [2018-06-22 01:17:31,159 INFO ]: Interpolant automaton has 9 states [2018-06-22 01:17:31,159 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 01:17:31,159 INFO ]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:17:31,159 INFO ]: Start difference. First operand 36 states and 62 transitions. Second operand 9 states. [2018-06-22 01:17:31,244 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:31,244 INFO ]: Finished difference Result 44 states and 72 transitions. [2018-06-22 01:17:31,245 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:17:31,245 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 01:17:31,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:31,245 INFO ]: With dead ends: 44 [2018-06-22 01:17:31,245 INFO ]: Without dead ends: 39 [2018-06-22 01:17:31,246 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2018-06-22 01:17:31,246 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 01:17:31,249 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 35. [2018-06-22 01:17:31,249 INFO ]: Start removeUnreachable. Operand 35 states. [2018-06-22 01:17:31,250 INFO ]: Finished removeUnreachable. Reduced from 35 states to 35 states and 58 transitions. [2018-06-22 01:17:31,250 INFO ]: Start accepts. Automaton has 35 states and 58 transitions. Word has length 13 [2018-06-22 01:17:31,250 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:31,250 INFO ]: Abstraction has 35 states and 58 transitions. [2018-06-22 01:17:31,250 INFO ]: Interpolant automaton has 9 states. [2018-06-22 01:17:31,250 INFO ]: Start isEmpty. Operand 35 states and 58 transitions. [2018-06-22 01:17:31,251 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 01:17:31,251 INFO ]: Found error trace [2018-06-22 01:17:31,251 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:31,251 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:31,251 INFO ]: Analyzing trace with hash -1590638272, now seen corresponding path program 1 times [2018-06-22 01:17:31,251 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:31,251 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:31,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,252 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:31,252 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,259 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,326 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,326 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:31,326 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:17:31,327 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:17:31,327 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:17:31,327 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:17:31,327 INFO ]: Start difference. First operand 35 states and 58 transitions. Second operand 5 states. [2018-06-22 01:17:31,355 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:31,355 INFO ]: Finished difference Result 39 states and 62 transitions. [2018-06-22 01:17:31,356 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 01:17:31,356 INFO ]: Start accepts. Automaton has 5 states. Word has length 13 [2018-06-22 01:17:31,356 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:31,356 INFO ]: With dead ends: 39 [2018-06-22 01:17:31,356 INFO ]: Without dead ends: 39 [2018-06-22 01:17:31,356 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:31,357 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 01:17:31,359 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 34. [2018-06-22 01:17:31,359 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-22 01:17:31,360 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2018-06-22 01:17:31,360 INFO ]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 13 [2018-06-22 01:17:31,360 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:31,360 INFO ]: Abstraction has 34 states and 57 transitions. [2018-06-22 01:17:31,360 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:17:31,360 INFO ]: Start isEmpty. Operand 34 states and 57 transitions. [2018-06-22 01:17:31,361 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:17:31,361 INFO ]: Found error trace [2018-06-22 01:17:31,361 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:31,361 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:31,361 INFO ]: Analyzing trace with hash 900192960, now seen corresponding path program 2 times [2018-06-22 01:17:31,361 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:31,361 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:31,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,362 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:31,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,371 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,437 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,437 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:31,437 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 01:17:31,443 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:31,465 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:31,465 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,467 INFO ]: Computing forward predicates... [2018-06-22 01:17:31,488 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,507 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:31,507 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 01:17:31,508 INFO ]: Interpolant automaton has 9 states [2018-06-22 01:17:31,508 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 01:17:31,508 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:17:31,508 INFO ]: Start difference. First operand 34 states and 57 transitions. Second operand 9 states. [2018-06-22 01:17:31,602 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:31,602 INFO ]: Finished difference Result 59 states and 94 transitions. [2018-06-22 01:17:31,602 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:17:31,603 INFO ]: Start accepts. Automaton has 9 states. Word has length 14 [2018-06-22 01:17:31,603 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:31,603 INFO ]: With dead ends: 59 [2018-06-22 01:17:31,603 INFO ]: Without dead ends: 59 [2018-06-22 01:17:31,603 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:31,603 INFO ]: Start minimizeSevpa. Operand 59 states. [2018-06-22 01:17:31,606 INFO ]: Finished minimizeSevpa. Reduced states from 59 to 29. [2018-06-22 01:17:31,606 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 01:17:31,607 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 47 transitions. [2018-06-22 01:17:31,607 INFO ]: Start accepts. Automaton has 29 states and 47 transitions. Word has length 14 [2018-06-22 01:17:31,607 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:31,607 INFO ]: Abstraction has 29 states and 47 transitions. [2018-06-22 01:17:31,607 INFO ]: Interpolant automaton has 9 states. [2018-06-22 01:17:31,607 INFO ]: Start isEmpty. Operand 29 states and 47 transitions. [2018-06-22 01:17:31,608 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:17:31,608 INFO ]: Found error trace [2018-06-22 01:17:31,608 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:31,608 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:31,608 INFO ]: Analyzing trace with hash 227757832, now seen corresponding path program 1 times [2018-06-22 01:17:31,608 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:31,608 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:31,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,609 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:31,609 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:31,620 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,797 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,798 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:31,798 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) [2018-06-22 01:17:31,811 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:31,844 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:31,848 INFO ]: Computing forward predicates... [2018-06-22 01:17:31,959 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:31,978 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:31,978 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 01:17:31,978 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:31,979 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:31,979 INFO ]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:31,979 INFO ]: Start difference. First operand 29 states and 47 transitions. Second operand 16 states. [2018-06-22 01:17:32,168 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:32,168 INFO ]: Finished difference Result 64 states and 98 transitions. [2018-06-22 01:17:32,169 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 01:17:32,169 INFO ]: Start accepts. Automaton has 16 states. Word has length 14 [2018-06-22 01:17:32,169 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:32,169 INFO ]: With dead ends: 64 [2018-06-22 01:17:32,169 INFO ]: Without dead ends: 62 [2018-06-22 01:17:32,170 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2018-06-22 01:17:32,170 INFO ]: Start minimizeSevpa. Operand 62 states. [2018-06-22 01:17:32,173 INFO ]: Finished minimizeSevpa. Reduced states from 62 to 33. [2018-06-22 01:17:32,173 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 01:17:32,174 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 54 transitions. [2018-06-22 01:17:32,174 INFO ]: Start accepts. Automaton has 33 states and 54 transitions. Word has length 14 [2018-06-22 01:17:32,174 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:32,174 INFO ]: Abstraction has 33 states and 54 transitions. [2018-06-22 01:17:32,174 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:32,174 INFO ]: Start isEmpty. Operand 33 states and 54 transitions. [2018-06-22 01:17:32,175 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:17:32,175 INFO ]: Found error trace [2018-06-22 01:17:32,175 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:32,175 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:32,175 INFO ]: Analyzing trace with hash 338580352, now seen corresponding path program 3 times [2018-06-22 01:17:32,175 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:32,175 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:32,175 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,175 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:32,176 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,183 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:32,228 INFO ]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:32,228 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:32,228 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 01:17:32,234 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:17:32,283 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 01:17:32,283 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:32,285 INFO ]: Computing forward predicates... [2018-06-22 01:17:32,358 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:32,377 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:32,378 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 01:17:32,378 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:17:32,378 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:17:32,378 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:17:32,378 INFO ]: Start difference. First operand 33 states and 54 transitions. Second operand 10 states. [2018-06-22 01:17:32,590 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:32,590 INFO ]: Finished difference Result 61 states and 93 transitions. [2018-06-22 01:17:32,591 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:17:32,591 INFO ]: Start accepts. Automaton has 10 states. Word has length 14 [2018-06-22 01:17:32,591 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:32,591 INFO ]: With dead ends: 61 [2018-06-22 01:17:32,591 INFO ]: Without dead ends: 61 [2018-06-22 01:17:32,591 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:32,592 INFO ]: Start minimizeSevpa. Operand 61 states. [2018-06-22 01:17:32,594 INFO ]: Finished minimizeSevpa. Reduced states from 61 to 35. [2018-06-22 01:17:32,595 INFO ]: Start removeUnreachable. Operand 35 states. [2018-06-22 01:17:32,595 INFO ]: Finished removeUnreachable. Reduced from 35 states to 35 states and 59 transitions. [2018-06-22 01:17:32,595 INFO ]: Start accepts. Automaton has 35 states and 59 transitions. Word has length 14 [2018-06-22 01:17:32,595 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:32,595 INFO ]: Abstraction has 35 states and 59 transitions. [2018-06-22 01:17:32,595 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:17:32,595 INFO ]: Start isEmpty. Operand 35 states and 59 transitions. [2018-06-22 01:17:32,596 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:17:32,596 INFO ]: Found error trace [2018-06-22 01:17:32,596 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:32,596 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:32,596 INFO ]: Analyzing trace with hash -651500610, now seen corresponding path program 1 times [2018-06-22 01:17:32,596 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:32,596 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:32,597 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,597 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:32,597 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,603 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:32,630 INFO ]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 01:17:32,630 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 01:17:32,630 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-22 01:17:32,630 INFO ]: Interpolant automaton has 5 states [2018-06-22 01:17:32,630 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 01:17:32,630 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-22 01:17:32,630 INFO ]: Start difference. First operand 35 states and 59 transitions. Second operand 5 states. [2018-06-22 01:17:32,718 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:32,718 INFO ]: Finished difference Result 46 states and 68 transitions. [2018-06-22 01:17:32,718 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 01:17:32,718 INFO ]: Start accepts. Automaton has 5 states. Word has length 14 [2018-06-22 01:17:32,718 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:32,719 INFO ]: With dead ends: 46 [2018-06-22 01:17:32,719 INFO ]: Without dead ends: 39 [2018-06-22 01:17:32,719 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-22 01:17:32,719 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 01:17:32,721 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 33. [2018-06-22 01:17:32,721 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 01:17:32,721 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 48 transitions. [2018-06-22 01:17:32,721 INFO ]: Start accepts. Automaton has 33 states and 48 transitions. Word has length 14 [2018-06-22 01:17:32,722 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:32,722 INFO ]: Abstraction has 33 states and 48 transitions. [2018-06-22 01:17:32,722 INFO ]: Interpolant automaton has 5 states. [2018-06-22 01:17:32,722 INFO ]: Start isEmpty. Operand 33 states and 48 transitions. [2018-06-22 01:17:32,722 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 01:17:32,722 INFO ]: Found error trace [2018-06-22 01:17:32,722 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:32,722 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:32,722 INFO ]: Analyzing trace with hash -2011617350, now seen corresponding path program 1 times [2018-06-22 01:17:32,722 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:32,722 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:32,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,723 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:32,723 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:32,734 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:32,813 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:32,813 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:32,813 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:32,819 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:32,839 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:32,842 INFO ]: Computing forward predicates... [2018-06-22 01:17:32,852 INFO ]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:32,872 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:32,872 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-22 01:17:32,872 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:17:32,872 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:17:32,872 INFO ]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:17:32,872 INFO ]: Start difference. First operand 33 states and 48 transitions. Second operand 10 states. [2018-06-22 01:17:33,003 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:33,003 INFO ]: Finished difference Result 47 states and 65 transitions. [2018-06-22 01:17:33,003 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 01:17:33,003 INFO ]: Start accepts. Automaton has 10 states. Word has length 14 [2018-06-22 01:17:33,003 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:33,004 INFO ]: With dead ends: 47 [2018-06-22 01:17:33,004 INFO ]: Without dead ends: 46 [2018-06-22 01:17:33,004 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2018-06-22 01:17:33,004 INFO ]: Start minimizeSevpa. Operand 46 states. [2018-06-22 01:17:33,006 INFO ]: Finished minimizeSevpa. Reduced states from 46 to 36. [2018-06-22 01:17:33,006 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-22 01:17:33,007 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 52 transitions. [2018-06-22 01:17:33,007 INFO ]: Start accepts. Automaton has 36 states and 52 transitions. Word has length 14 [2018-06-22 01:17:33,007 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:33,007 INFO ]: Abstraction has 36 states and 52 transitions. [2018-06-22 01:17:33,007 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:17:33,007 INFO ]: Start isEmpty. Operand 36 states and 52 transitions. [2018-06-22 01:17:33,008 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:17:33,008 INFO ]: Found error trace [2018-06-22 01:17:33,008 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:33,008 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:33,008 INFO ]: Analyzing trace with hash 1960673602, now seen corresponding path program 2 times [2018-06-22 01:17:33,008 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:33,008 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:33,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:33,009 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:33,009 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:33,016 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:33,237 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:33,237 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:33,237 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 01:17:33,243 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:33,284 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:33,284 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:33,286 INFO ]: Computing forward predicates... [2018-06-22 01:17:33,354 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:33,374 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:33,374 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 01:17:33,374 INFO ]: Interpolant automaton has 11 states [2018-06-22 01:17:33,374 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 01:17:33,374 INFO ]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2018-06-22 01:17:33,374 INFO ]: Start difference. First operand 36 states and 52 transitions. Second operand 11 states. [2018-06-22 01:17:33,506 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:33,506 INFO ]: Finished difference Result 54 states and 74 transitions. [2018-06-22 01:17:33,506 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 01:17:33,506 INFO ]: Start accepts. Automaton has 11 states. Word has length 15 [2018-06-22 01:17:33,506 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:33,507 INFO ]: With dead ends: 54 [2018-06-22 01:17:33,507 INFO ]: Without dead ends: 51 [2018-06-22 01:17:33,507 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2018-06-22 01:17:33,507 INFO ]: Start minimizeSevpa. Operand 51 states. [2018-06-22 01:17:33,510 INFO ]: Finished minimizeSevpa. Reduced states from 51 to 38. [2018-06-22 01:17:33,510 INFO ]: Start removeUnreachable. Operand 38 states. [2018-06-22 01:17:33,510 INFO ]: Finished removeUnreachable. Reduced from 38 states to 38 states and 54 transitions. [2018-06-22 01:17:33,510 INFO ]: Start accepts. Automaton has 38 states and 54 transitions. Word has length 15 [2018-06-22 01:17:33,511 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:33,511 INFO ]: Abstraction has 38 states and 54 transitions. [2018-06-22 01:17:33,511 INFO ]: Interpolant automaton has 11 states. [2018-06-22 01:17:33,511 INFO ]: Start isEmpty. Operand 38 states and 54 transitions. [2018-06-22 01:17:33,511 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:17:33,511 INFO ]: Found error trace [2018-06-22 01:17:33,511 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:33,511 INFO ]: === Iteration 17 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:33,511 INFO ]: Analyzing trace with hash 2071496122, now seen corresponding path program 4 times [2018-06-22 01:17:33,511 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:33,511 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:33,512 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:33,512 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:33,512 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:33,522 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:34,196 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:34,196 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:34,196 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 01:17:34,203 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:34,226 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:34,226 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:34,228 INFO ]: Computing forward predicates... [2018-06-22 01:17:34,303 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:34,322 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:34,322 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2018-06-22 01:17:34,322 INFO ]: Interpolant automaton has 17 states [2018-06-22 01:17:34,322 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 01:17:34,322 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 01:17:34,323 INFO ]: Start difference. First operand 38 states and 54 transitions. Second operand 17 states. [2018-06-22 01:17:34,654 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:34,654 INFO ]: Finished difference Result 80 states and 111 transitions. [2018-06-22 01:17:34,657 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:17:34,657 INFO ]: Start accepts. Automaton has 17 states. Word has length 15 [2018-06-22 01:17:34,657 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:34,658 INFO ]: With dead ends: 80 [2018-06-22 01:17:34,658 INFO ]: Without dead ends: 79 [2018-06-22 01:17:34,658 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:34,658 INFO ]: Start minimizeSevpa. Operand 79 states. [2018-06-22 01:17:34,665 INFO ]: Finished minimizeSevpa. Reduced states from 79 to 45. [2018-06-22 01:17:34,665 INFO ]: Start removeUnreachable. Operand 45 states. [2018-06-22 01:17:34,665 INFO ]: Finished removeUnreachable. Reduced from 45 states to 45 states and 66 transitions. [2018-06-22 01:17:34,666 INFO ]: Start accepts. Automaton has 45 states and 66 transitions. Word has length 15 [2018-06-22 01:17:34,666 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:34,666 INFO ]: Abstraction has 45 states and 66 transitions. [2018-06-22 01:17:34,666 INFO ]: Interpolant automaton has 17 states. [2018-06-22 01:17:34,666 INFO ]: Start isEmpty. Operand 45 states and 66 transitions. [2018-06-22 01:17:34,666 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:17:34,666 INFO ]: Found error trace [2018-06-22 01:17:34,666 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:34,667 INFO ]: === Iteration 18 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:34,667 INFO ]: Analyzing trace with hash 1730551938, now seen corresponding path program 3 times [2018-06-22 01:17:34,667 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:34,667 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:34,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:34,667 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:34,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:34,681 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:35,490 INFO ]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:35,490 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:35,490 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) [2018-06-22 01:17:35,508 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:35,559 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 01:17:35,559 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:35,561 INFO ]: Computing forward predicates... [2018-06-22 01:17:36,086 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,106 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:36,106 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 01:17:36,106 INFO ]: Interpolant automaton has 12 states [2018-06-22 01:17:36,106 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 01:17:36,106 INFO ]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:36,106 INFO ]: Start difference. First operand 45 states and 66 transitions. Second operand 12 states. [2018-06-22 01:17:36,246 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:36,246 INFO ]: Finished difference Result 64 states and 88 transitions. [2018-06-22 01:17:36,247 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:36,247 INFO ]: Start accepts. Automaton has 12 states. Word has length 15 [2018-06-22 01:17:36,247 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:36,247 INFO ]: With dead ends: 64 [2018-06-22 01:17:36,247 INFO ]: Without dead ends: 57 [2018-06-22 01:17:36,248 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:17:36,248 INFO ]: Start minimizeSevpa. Operand 57 states. [2018-06-22 01:17:36,250 INFO ]: Finished minimizeSevpa. Reduced states from 57 to 43. [2018-06-22 01:17:36,250 INFO ]: Start removeUnreachable. Operand 43 states. [2018-06-22 01:17:36,251 INFO ]: Finished removeUnreachable. Reduced from 43 states to 43 states and 62 transitions. [2018-06-22 01:17:36,251 INFO ]: Start accepts. Automaton has 43 states and 62 transitions. Word has length 15 [2018-06-22 01:17:36,252 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:36,252 INFO ]: Abstraction has 43 states and 62 transitions. [2018-06-22 01:17:36,252 INFO ]: Interpolant automaton has 12 states. [2018-06-22 01:17:36,252 INFO ]: Start isEmpty. Operand 43 states and 62 transitions. [2018-06-22 01:17:36,252 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:17:36,252 INFO ]: Found error trace [2018-06-22 01:17:36,252 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:36,252 INFO ]: === Iteration 19 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:36,252 INFO ]: Analyzing trace with hash 2117900416, now seen corresponding path program 2 times [2018-06-22 01:17:36,252 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:36,252 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:36,253 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,253 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:36,253 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,261 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,328 INFO ]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,328 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:36,328 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:36,334 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:36,356 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:36,356 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,358 INFO ]: Computing forward predicates... [2018-06-22 01:17:36,410 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,431 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:36,431 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2018-06-22 01:17:36,431 INFO ]: Interpolant automaton has 10 states [2018-06-22 01:17:36,431 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 01:17:36,431 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 01:17:36,431 INFO ]: Start difference. First operand 43 states and 62 transitions. Second operand 10 states. [2018-06-22 01:17:36,518 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:36,518 INFO ]: Finished difference Result 75 states and 101 transitions. [2018-06-22 01:17:36,520 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:36,520 INFO ]: Start accepts. Automaton has 10 states. Word has length 15 [2018-06-22 01:17:36,520 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:36,521 INFO ]: With dead ends: 75 [2018-06-22 01:17:36,521 INFO ]: Without dead ends: 71 [2018-06-22 01:17:36,521 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2018-06-22 01:17:36,521 INFO ]: Start minimizeSevpa. Operand 71 states. [2018-06-22 01:17:36,524 INFO ]: Finished minimizeSevpa. Reduced states from 71 to 49. [2018-06-22 01:17:36,524 INFO ]: Start removeUnreachable. Operand 49 states. [2018-06-22 01:17:36,525 INFO ]: Finished removeUnreachable. Reduced from 49 states to 49 states and 70 transitions. [2018-06-22 01:17:36,525 INFO ]: Start accepts. Automaton has 49 states and 70 transitions. Word has length 15 [2018-06-22 01:17:36,525 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:36,525 INFO ]: Abstraction has 49 states and 70 transitions. [2018-06-22 01:17:36,525 INFO ]: Interpolant automaton has 10 states. [2018-06-22 01:17:36,525 INFO ]: Start isEmpty. Operand 49 states and 70 transitions. [2018-06-22 01:17:36,525 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 01:17:36,525 INFO ]: Found error trace [2018-06-22 01:17:36,525 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:36,526 INFO ]: === Iteration 20 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:36,526 INFO ]: Analyzing trace with hash -363691022, now seen corresponding path program 3 times [2018-06-22 01:17:36,526 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:36,526 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:36,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,527 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:36,527 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,534 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,612 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,613 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:36,613 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:36,618 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:17:36,649 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 01:17:36,650 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,651 INFO ]: Computing forward predicates... [2018-06-22 01:17:36,676 INFO ]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,695 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:36,695 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 01:17:36,695 INFO ]: Interpolant automaton has 9 states [2018-06-22 01:17:36,696 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 01:17:36,696 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 01:17:36,696 INFO ]: Start difference. First operand 49 states and 70 transitions. Second operand 9 states. [2018-06-22 01:17:36,743 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:36,743 INFO ]: Finished difference Result 63 states and 87 transitions. [2018-06-22 01:17:36,743 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 01:17:36,743 INFO ]: Start accepts. Automaton has 9 states. Word has length 15 [2018-06-22 01:17:36,743 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:36,744 INFO ]: With dead ends: 63 [2018-06-22 01:17:36,744 INFO ]: Without dead ends: 63 [2018-06-22 01:17:36,744 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:36,744 INFO ]: Start minimizeSevpa. Operand 63 states. [2018-06-22 01:17:36,746 INFO ]: Finished minimizeSevpa. Reduced states from 63 to 50. [2018-06-22 01:17:36,746 INFO ]: Start removeUnreachable. Operand 50 states. [2018-06-22 01:17:36,747 INFO ]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2018-06-22 01:17:36,747 INFO ]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 15 [2018-06-22 01:17:36,747 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:36,747 INFO ]: Abstraction has 50 states and 71 transitions. [2018-06-22 01:17:36,747 INFO ]: Interpolant automaton has 9 states. [2018-06-22 01:17:36,747 INFO ]: Start isEmpty. Operand 50 states and 71 transitions. [2018-06-22 01:17:36,748 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:17:36,748 INFO ]: Found error trace [2018-06-22 01:17:36,748 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:36,748 INFO ]: === Iteration 21 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:36,748 INFO ]: Analyzing trace with hash -42689856, now seen corresponding path program 5 times [2018-06-22 01:17:36,748 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:36,748 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:36,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,749 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:36,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:36,758 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,834 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,834 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:36,834 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:36,840 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:36,894 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-06-22 01:17:36,894 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:36,896 INFO ]: Computing forward predicates... [2018-06-22 01:17:36,947 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:36,978 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:36,978 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 01:17:36,978 INFO ]: Interpolant automaton has 12 states [2018-06-22 01:17:36,978 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 01:17:36,978 INFO ]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:36,978 INFO ]: Start difference. First operand 50 states and 71 transitions. Second operand 12 states. [2018-06-22 01:17:37,190 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:37,190 INFO ]: Finished difference Result 97 states and 132 transitions. [2018-06-22 01:17:37,191 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 01:17:37,191 INFO ]: Start accepts. Automaton has 12 states. Word has length 16 [2018-06-22 01:17:37,191 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:37,192 INFO ]: With dead ends: 97 [2018-06-22 01:17:37,192 INFO ]: Without dead ends: 97 [2018-06-22 01:17:37,192 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:37,192 INFO ]: Start minimizeSevpa. Operand 97 states. [2018-06-22 01:17:37,195 INFO ]: Finished minimizeSevpa. Reduced states from 97 to 45. [2018-06-22 01:17:37,195 INFO ]: Start removeUnreachable. Operand 45 states. [2018-06-22 01:17:37,195 INFO ]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2018-06-22 01:17:37,195 INFO ]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 16 [2018-06-22 01:17:37,195 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:37,195 INFO ]: Abstraction has 45 states and 62 transitions. [2018-06-22 01:17:37,195 INFO ]: Interpolant automaton has 12 states. [2018-06-22 01:17:37,195 INFO ]: Start isEmpty. Operand 45 states and 62 transitions. [2018-06-22 01:17:37,196 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:17:37,196 INFO ]: Found error trace [2018-06-22 01:17:37,196 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:37,196 INFO ]: === Iteration 22 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:37,196 INFO ]: Analyzing trace with hash -383634040, now seen corresponding path program 4 times [2018-06-22 01:17:37,196 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:37,196 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:37,197 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:37,197 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:37,197 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:37,205 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:37,355 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:37,355 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:37,355 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:37,362 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:37,403 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:37,403 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:37,405 INFO ]: Computing forward predicates... [2018-06-22 01:17:37,510 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:37,529 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:37,529 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 01:17:37,529 INFO ]: Interpolant automaton has 19 states [2018-06-22 01:17:37,530 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 01:17:37,530 INFO ]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:17:37,530 INFO ]: Start difference. First operand 45 states and 62 transitions. Second operand 19 states. [2018-06-22 01:17:37,771 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:37,771 INFO ]: Finished difference Result 93 states and 124 transitions. [2018-06-22 01:17:37,774 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:37,774 INFO ]: Start accepts. Automaton has 19 states. Word has length 16 [2018-06-22 01:17:37,774 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:37,774 INFO ]: With dead ends: 93 [2018-06-22 01:17:37,774 INFO ]: Without dead ends: 91 [2018-06-22 01:17:37,775 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2018-06-22 01:17:37,775 INFO ]: Start minimizeSevpa. Operand 91 states. [2018-06-22 01:17:37,777 INFO ]: Finished minimizeSevpa. Reduced states from 91 to 50. [2018-06-22 01:17:37,777 INFO ]: Start removeUnreachable. Operand 50 states. [2018-06-22 01:17:37,778 INFO ]: Finished removeUnreachable. Reduced from 50 states to 50 states and 70 transitions. [2018-06-22 01:17:37,778 INFO ]: Start accepts. Automaton has 50 states and 70 transitions. Word has length 16 [2018-06-22 01:17:37,778 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:37,778 INFO ]: Abstraction has 50 states and 70 transitions. [2018-06-22 01:17:37,778 INFO ]: Interpolant automaton has 19 states. [2018-06-22 01:17:37,778 INFO ]: Start isEmpty. Operand 50 states and 70 transitions. [2018-06-22 01:17:37,778 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:17:37,778 INFO ]: Found error trace [2018-06-22 01:17:37,778 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:37,779 INFO ]: === Iteration 23 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:37,783 INFO ]: Analyzing trace with hash -272811520, now seen corresponding path program 6 times [2018-06-22 01:17:37,783 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:37,783 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:37,784 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:37,784 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:37,784 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:37,791 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:37,963 INFO ]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:37,963 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:37,963 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:37,968 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:17:37,994 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-06-22 01:17:37,994 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:37,996 INFO ]: Computing forward predicates... [2018-06-22 01:17:38,086 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:38,105 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:38,105 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 01:17:38,105 INFO ]: Interpolant automaton has 13 states [2018-06-22 01:17:38,105 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 01:17:38,105 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 01:17:38,105 INFO ]: Start difference. First operand 50 states and 70 transitions. Second operand 13 states. [2018-06-22 01:17:38,466 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:38,466 INFO ]: Finished difference Result 100 states and 132 transitions. [2018-06-22 01:17:38,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:38,467 INFO ]: Start accepts. Automaton has 13 states. Word has length 16 [2018-06-22 01:17:38,467 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:38,468 INFO ]: With dead ends: 100 [2018-06-22 01:17:38,468 INFO ]: Without dead ends: 95 [2018-06-22 01:17:38,468 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2018-06-22 01:17:38,468 INFO ]: Start minimizeSevpa. Operand 95 states. [2018-06-22 01:17:38,470 INFO ]: Finished minimizeSevpa. Reduced states from 95 to 51. [2018-06-22 01:17:38,470 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-22 01:17:38,471 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2018-06-22 01:17:38,471 INFO ]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 16 [2018-06-22 01:17:38,471 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:38,471 INFO ]: Abstraction has 51 states and 71 transitions. [2018-06-22 01:17:38,471 INFO ]: Interpolant automaton has 13 states. [2018-06-22 01:17:38,471 INFO ]: Start isEmpty. Operand 51 states and 71 transitions. [2018-06-22 01:17:38,471 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:17:38,471 INFO ]: Found error trace [2018-06-22 01:17:38,471 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:38,471 INFO ]: === Iteration 24 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:38,472 INFO ]: Analyzing trace with hash 619878902, now seen corresponding path program 1 times [2018-06-22 01:17:38,472 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:38,472 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:38,472 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:38,472 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:38,472 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:38,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:38,590 INFO ]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:38,590 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:38,590 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:38,595 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:38,618 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:38,619 INFO ]: Computing forward predicates... [2018-06-22 01:17:38,642 INFO ]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:38,661 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:38,661 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-06-22 01:17:38,661 INFO ]: Interpolant automaton has 12 states [2018-06-22 01:17:38,661 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 01:17:38,661 INFO ]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:38,661 INFO ]: Start difference. First operand 51 states and 71 transitions. Second operand 12 states. [2018-06-22 01:17:38,835 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:38,835 INFO ]: Finished difference Result 67 states and 88 transitions. [2018-06-22 01:17:38,835 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:38,835 INFO ]: Start accepts. Automaton has 12 states. Word has length 16 [2018-06-22 01:17:38,835 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:38,836 INFO ]: With dead ends: 67 [2018-06-22 01:17:38,836 INFO ]: Without dead ends: 62 [2018-06-22 01:17:38,836 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2018-06-22 01:17:38,836 INFO ]: Start minimizeSevpa. Operand 62 states. [2018-06-22 01:17:38,838 INFO ]: Finished minimizeSevpa. Reduced states from 62 to 49. [2018-06-22 01:17:38,838 INFO ]: Start removeUnreachable. Operand 49 states. [2018-06-22 01:17:38,838 INFO ]: Finished removeUnreachable. Reduced from 49 states to 49 states and 68 transitions. [2018-06-22 01:17:38,838 INFO ]: Start accepts. Automaton has 49 states and 68 transitions. Word has length 16 [2018-06-22 01:17:38,838 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:38,838 INFO ]: Abstraction has 49 states and 68 transitions. [2018-06-22 01:17:38,838 INFO ]: Interpolant automaton has 12 states. [2018-06-22 01:17:38,838 INFO ]: Start isEmpty. Operand 49 states and 68 transitions. [2018-06-22 01:17:38,839 INFO ]: Finished isEmpty. Found accepting run of length 17 [2018-06-22 01:17:38,839 INFO ]: Found error trace [2018-06-22 01:17:38,839 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:38,839 INFO ]: === Iteration 25 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:38,839 INFO ]: Analyzing trace with hash 1664009032, now seen corresponding path program 4 times [2018-06-22 01:17:38,839 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:38,839 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:38,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:38,840 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:38,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:38,847 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:39,437 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:39,437 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:39,437 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:39,445 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:39,467 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:39,467 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:39,470 INFO ]: Computing forward predicates... [2018-06-22 01:17:39,497 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:39,516 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:39,516 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-06-22 01:17:39,516 INFO ]: Interpolant automaton has 12 states [2018-06-22 01:17:39,516 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 01:17:39,517 INFO ]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:39,517 INFO ]: Start difference. First operand 49 states and 68 transitions. Second operand 12 states. [2018-06-22 01:17:39,673 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:39,673 INFO ]: Finished difference Result 66 states and 88 transitions. [2018-06-22 01:17:39,673 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:39,674 INFO ]: Start accepts. Automaton has 12 states. Word has length 16 [2018-06-22 01:17:39,674 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:39,674 INFO ]: With dead ends: 66 [2018-06-22 01:17:39,674 INFO ]: Without dead ends: 65 [2018-06-22 01:17:39,674 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2018-06-22 01:17:39,674 INFO ]: Start minimizeSevpa. Operand 65 states. [2018-06-22 01:17:39,676 INFO ]: Finished minimizeSevpa. Reduced states from 65 to 52. [2018-06-22 01:17:39,676 INFO ]: Start removeUnreachable. Operand 52 states. [2018-06-22 01:17:39,676 INFO ]: Finished removeUnreachable. Reduced from 52 states to 52 states and 72 transitions. [2018-06-22 01:17:39,677 INFO ]: Start accepts. Automaton has 52 states and 72 transitions. Word has length 16 [2018-06-22 01:17:39,677 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:39,677 INFO ]: Abstraction has 52 states and 72 transitions. [2018-06-22 01:17:39,677 INFO ]: Interpolant automaton has 12 states. [2018-06-22 01:17:39,677 INFO ]: Start isEmpty. Operand 52 states and 72 transitions. [2018-06-22 01:17:39,677 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 01:17:39,677 INFO ]: Found error trace [2018-06-22 01:17:39,677 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:39,677 INFO ]: === Iteration 26 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:39,677 INFO ]: Analyzing trace with hash -1498889918, now seen corresponding path program 5 times [2018-06-22 01:17:39,677 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:39,677 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:39,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:39,678 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:39,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:39,684 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:39,746 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:39,746 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:39,746 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:39,753 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:39,779 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-06-22 01:17:39,779 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:39,780 INFO ]: Computing forward predicates... [2018-06-22 01:17:39,823 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:39,842 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:39,842 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2018-06-22 01:17:39,842 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:17:39,843 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:17:39,843 INFO ]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:17:39,843 INFO ]: Start difference. First operand 52 states and 72 transitions. Second operand 14 states. [2018-06-22 01:17:39,955 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:39,955 INFO ]: Finished difference Result 88 states and 116 transitions. [2018-06-22 01:17:39,981 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 01:17:39,981 INFO ]: Start accepts. Automaton has 14 states. Word has length 17 [2018-06-22 01:17:39,981 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:39,982 INFO ]: With dead ends: 88 [2018-06-22 01:17:39,982 INFO ]: Without dead ends: 83 [2018-06-22 01:17:39,982 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:17:39,982 INFO ]: Start minimizeSevpa. Operand 83 states. [2018-06-22 01:17:39,984 INFO ]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-06-22 01:17:39,984 INFO ]: Start removeUnreachable. Operand 56 states. [2018-06-22 01:17:39,984 INFO ]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2018-06-22 01:17:39,985 INFO ]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 17 [2018-06-22 01:17:39,985 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:39,985 INFO ]: Abstraction has 56 states and 77 transitions. [2018-06-22 01:17:39,985 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:17:39,985 INFO ]: Start isEmpty. Operand 56 states and 77 transitions. [2018-06-22 01:17:39,985 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 01:17:39,985 INFO ]: Found error trace [2018-06-22 01:17:39,985 INFO ]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:39,985 INFO ]: === Iteration 27 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:39,985 INFO ]: Analyzing trace with hash -1388067398, now seen corresponding path program 7 times [2018-06-22 01:17:39,985 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:39,985 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:39,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:39,986 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:39,986 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:39,997 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:40,152 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:40,152 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:40,152 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:40,158 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:40,182 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:40,184 INFO ]: Computing forward predicates... [2018-06-22 01:17:40,296 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:40,315 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:40,315 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2018-06-22 01:17:40,315 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:17:40,315 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:17:40,315 INFO ]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:17:40,315 INFO ]: Start difference. First operand 56 states and 77 transitions. Second operand 20 states. [2018-06-22 01:17:40,545 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:40,545 INFO ]: Finished difference Result 123 states and 163 transitions. [2018-06-22 01:17:40,545 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 01:17:40,545 INFO ]: Start accepts. Automaton has 20 states. Word has length 17 [2018-06-22 01:17:40,545 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:40,545 INFO ]: With dead ends: 123 [2018-06-22 01:17:40,545 INFO ]: Without dead ends: 122 [2018-06-22 01:17:40,546 INFO ]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2018-06-22 01:17:40,546 INFO ]: Start minimizeSevpa. Operand 122 states. [2018-06-22 01:17:40,548 INFO ]: Finished minimizeSevpa. Reduced states from 122 to 64. [2018-06-22 01:17:40,548 INFO ]: Start removeUnreachable. Operand 64 states. [2018-06-22 01:17:40,549 INFO ]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2018-06-22 01:17:40,549 INFO ]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 17 [2018-06-22 01:17:40,550 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:40,550 INFO ]: Abstraction has 64 states and 90 transitions. [2018-06-22 01:17:40,550 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:17:40,550 INFO ]: Start isEmpty. Operand 64 states and 90 transitions. [2018-06-22 01:17:40,550 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 01:17:40,550 INFO ]: Found error trace [2018-06-22 01:17:40,550 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:40,550 INFO ]: === Iteration 28 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:40,550 INFO ]: Analyzing trace with hash -42726910, now seen corresponding path program 6 times [2018-06-22 01:17:40,550 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:40,551 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:40,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:40,551 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:40,551 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:40,557 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:40,629 INFO ]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:40,629 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:40,629 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:40,635 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:17:40,660 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-06-22 01:17:40,660 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:40,661 INFO ]: Computing forward predicates... [2018-06-22 01:17:40,703 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:40,721 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:40,721 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-22 01:17:40,722 INFO ]: Interpolant automaton has 15 states [2018-06-22 01:17:40,722 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 01:17:40,722 INFO ]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2018-06-22 01:17:40,722 INFO ]: Start difference. First operand 64 states and 90 transitions. Second operand 15 states. [2018-06-22 01:17:40,919 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:40,919 INFO ]: Finished difference Result 101 states and 133 transitions. [2018-06-22 01:17:40,919 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 01:17:40,919 INFO ]: Start accepts. Automaton has 15 states. Word has length 17 [2018-06-22 01:17:40,920 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:40,920 INFO ]: With dead ends: 101 [2018-06-22 01:17:40,920 INFO ]: Without dead ends: 90 [2018-06-22 01:17:40,920 INFO ]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=492, Unknown=0, NotChecked=0, Total=650 [2018-06-22 01:17:40,920 INFO ]: Start minimizeSevpa. Operand 90 states. [2018-06-22 01:17:40,922 INFO ]: Finished minimizeSevpa. Reduced states from 90 to 64. [2018-06-22 01:17:40,922 INFO ]: Start removeUnreachable. Operand 64 states. [2018-06-22 01:17:40,923 INFO ]: Finished removeUnreachable. Reduced from 64 states to 64 states and 88 transitions. [2018-06-22 01:17:40,923 INFO ]: Start accepts. Automaton has 64 states and 88 transitions. Word has length 17 [2018-06-22 01:17:40,923 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:40,923 INFO ]: Abstraction has 64 states and 88 transitions. [2018-06-22 01:17:40,923 INFO ]: Interpolant automaton has 15 states. [2018-06-22 01:17:40,923 INFO ]: Start isEmpty. Operand 64 states and 88 transitions. [2018-06-22 01:17:40,923 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 01:17:40,923 INFO ]: Found error trace [2018-06-22 01:17:40,924 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:40,924 INFO ]: === Iteration 29 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:40,924 INFO ]: Analyzing trace with hash 98201266, now seen corresponding path program 5 times [2018-06-22 01:17:40,924 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:40,924 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:40,924 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:40,924 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:40,924 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:40,931 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,152 INFO ]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:41,153 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:41,153 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:41,158 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:41,185 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-06-22 01:17:41,185 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,187 INFO ]: Computing forward predicates... [2018-06-22 01:17:41,224 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:41,244 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:41,244 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2018-06-22 01:17:41,244 INFO ]: Interpolant automaton has 13 states [2018-06-22 01:17:41,244 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 01:17:41,244 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 01:17:41,244 INFO ]: Start difference. First operand 64 states and 88 transitions. Second operand 13 states. [2018-06-22 01:17:41,397 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:41,397 INFO ]: Finished difference Result 116 states and 151 transitions. [2018-06-22 01:17:41,398 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:17:41,398 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 01:17:41,398 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:41,399 INFO ]: With dead ends: 116 [2018-06-22 01:17:41,399 INFO ]: Without dead ends: 111 [2018-06-22 01:17:41,399 INFO ]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=437, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:41,399 INFO ]: Start minimizeSevpa. Operand 111 states. [2018-06-22 01:17:41,402 INFO ]: Finished minimizeSevpa. Reduced states from 111 to 73. [2018-06-22 01:17:41,402 INFO ]: Start removeUnreachable. Operand 73 states. [2018-06-22 01:17:41,402 INFO ]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2018-06-22 01:17:41,402 INFO ]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 17 [2018-06-22 01:17:41,403 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:41,403 INFO ]: Abstraction has 73 states and 100 transitions. [2018-06-22 01:17:41,403 INFO ]: Interpolant automaton has 13 states. [2018-06-22 01:17:41,403 INFO ]: Start isEmpty. Operand 73 states and 100 transitions. [2018-06-22 01:17:41,403 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 01:17:41,403 INFO ]: Found error trace [2018-06-22 01:17:41,403 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:41,403 INFO ]: === Iteration 30 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:41,403 INFO ]: Analyzing trace with hash 478278016, now seen corresponding path program 6 times [2018-06-22 01:17:41,403 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:41,403 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:41,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:41,404 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:41,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:41,411 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,604 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:41,604 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:41,604 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:41,610 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:17:41,638 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-06-22 01:17:41,638 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,640 INFO ]: Computing forward predicates... [2018-06-22 01:17:41,666 INFO ]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:41,685 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:41,685 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 01:17:41,685 INFO ]: Interpolant automaton has 12 states [2018-06-22 01:17:41,685 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 01:17:41,685 INFO ]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-22 01:17:41,686 INFO ]: Start difference. First operand 73 states and 100 transitions. Second operand 12 states. [2018-06-22 01:17:41,760 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:41,760 INFO ]: Finished difference Result 100 states and 133 transitions. [2018-06-22 01:17:41,760 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 01:17:41,760 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 01:17:41,760 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:41,760 INFO ]: With dead ends: 100 [2018-06-22 01:17:41,760 INFO ]: Without dead ends: 100 [2018-06-22 01:17:41,761 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:41,761 INFO ]: Start minimizeSevpa. Operand 100 states. [2018-06-22 01:17:41,763 INFO ]: Finished minimizeSevpa. Reduced states from 100 to 74. [2018-06-22 01:17:41,763 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-22 01:17:41,764 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2018-06-22 01:17:41,764 INFO ]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 17 [2018-06-22 01:17:41,764 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:41,764 INFO ]: Abstraction has 74 states and 101 transitions. [2018-06-22 01:17:41,764 INFO ]: Interpolant automaton has 12 states. [2018-06-22 01:17:41,764 INFO ]: Start isEmpty. Operand 74 states and 101 transitions. [2018-06-22 01:17:41,764 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:41,764 INFO ]: Found error trace [2018-06-22 01:17:41,764 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:41,764 INFO ]: === Iteration 31 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:41,764 INFO ]: Analyzing trace with hash -1601261248, now seen corresponding path program 8 times [2018-06-22 01:17:41,764 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:41,764 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:41,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:41,765 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:41,765 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:41,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,929 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:41,930 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:41,930 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:41,936 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:41,965 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:41,965 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:41,967 INFO ]: Computing forward predicates... [2018-06-22 01:17:42,022 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:42,045 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:42,045 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-22 01:17:42,045 INFO ]: Interpolant automaton has 15 states [2018-06-22 01:17:42,046 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 01:17:42,046 INFO ]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-06-22 01:17:42,046 INFO ]: Start difference. First operand 74 states and 101 transitions. Second operand 15 states. [2018-06-22 01:17:42,154 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:42,154 INFO ]: Finished difference Result 151 states and 196 transitions. [2018-06-22 01:17:42,155 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:17:42,155 INFO ]: Start accepts. Automaton has 15 states. Word has length 18 [2018-06-22 01:17:42,155 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:42,155 INFO ]: With dead ends: 151 [2018-06-22 01:17:42,155 INFO ]: Without dead ends: 151 [2018-06-22 01:17:42,156 INFO ]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:17:42,156 INFO ]: Start minimizeSevpa. Operand 151 states. [2018-06-22 01:17:42,159 INFO ]: Finished minimizeSevpa. Reduced states from 151 to 68. [2018-06-22 01:17:42,159 INFO ]: Start removeUnreachable. Operand 68 states. [2018-06-22 01:17:42,159 INFO ]: Finished removeUnreachable. Reduced from 68 states to 68 states and 91 transitions. [2018-06-22 01:17:42,159 INFO ]: Start accepts. Automaton has 68 states and 91 transitions. Word has length 18 [2018-06-22 01:17:42,159 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:42,159 INFO ]: Abstraction has 68 states and 91 transitions. [2018-06-22 01:17:42,159 INFO ]: Interpolant automaton has 15 states. [2018-06-22 01:17:42,159 INFO ]: Start isEmpty. Operand 68 states and 91 transitions. [2018-06-22 01:17:42,160 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:42,160 INFO ]: Found error trace [2018-06-22 01:17:42,160 INFO ]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:42,160 INFO ]: === Iteration 32 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:42,160 INFO ]: Analyzing trace with hash -255920760, now seen corresponding path program 7 times [2018-06-22 01:17:42,160 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:42,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:42,160 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:42,160 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:42,160 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:42,169 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:42,278 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:42,278 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:42,278 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:42,284 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:42,325 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:42,328 INFO ]: Computing forward predicates... [2018-06-22 01:17:42,832 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:42,854 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:42,854 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2018-06-22 01:17:42,854 INFO ]: Interpolant automaton has 22 states [2018-06-22 01:17:42,854 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 01:17:42,854 INFO ]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2018-06-22 01:17:42,854 INFO ]: Start difference. First operand 68 states and 91 transitions. Second operand 22 states. [2018-06-22 01:17:43,195 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:43,195 INFO ]: Finished difference Result 144 states and 184 transitions. [2018-06-22 01:17:43,195 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 01:17:43,195 INFO ]: Start accepts. Automaton has 22 states. Word has length 18 [2018-06-22 01:17:43,196 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:43,196 INFO ]: With dead ends: 144 [2018-06-22 01:17:43,196 INFO ]: Without dead ends: 142 [2018-06-22 01:17:43,196 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:17:43,197 INFO ]: Start minimizeSevpa. Operand 142 states. [2018-06-22 01:17:43,199 INFO ]: Finished minimizeSevpa. Reduced states from 142 to 74. [2018-06-22 01:17:43,199 INFO ]: Start removeUnreachable. Operand 74 states. [2018-06-22 01:17:43,199 INFO ]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2018-06-22 01:17:43,199 INFO ]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 18 [2018-06-22 01:17:43,200 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:43,200 INFO ]: Abstraction has 74 states and 100 transitions. [2018-06-22 01:17:43,200 INFO ]: Interpolant automaton has 22 states. [2018-06-22 01:17:43,200 INFO ]: Start isEmpty. Operand 74 states and 100 transitions. [2018-06-22 01:17:43,200 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:43,200 INFO ]: Found error trace [2018-06-22 01:17:43,200 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:43,200 INFO ]: === Iteration 33 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:43,200 INFO ]: Analyzing trace with hash -145098240, now seen corresponding path program 9 times [2018-06-22 01:17:43,200 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:43,200 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:43,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:43,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:43,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:43,208 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:43,296 INFO ]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:43,296 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:43,296 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:43,302 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:17:43,334 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 01:17:43,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:43,336 INFO ]: Computing forward predicates... [2018-06-22 01:17:43,403 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:43,422 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:43,422 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 01:17:43,422 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:43,423 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:43,423 INFO ]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:43,423 INFO ]: Start difference. First operand 74 states and 100 transitions. Second operand 16 states. [2018-06-22 01:17:43,603 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:43,603 INFO ]: Finished difference Result 154 states and 196 transitions. [2018-06-22 01:17:43,606 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-22 01:17:43,606 INFO ]: Start accepts. Automaton has 16 states. Word has length 18 [2018-06-22 01:17:43,606 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:43,607 INFO ]: With dead ends: 154 [2018-06-22 01:17:43,607 INFO ]: Without dead ends: 148 [2018-06-22 01:17:43,607 INFO ]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2018-06-22 01:17:43,607 INFO ]: Start minimizeSevpa. Operand 148 states. [2018-06-22 01:17:43,610 INFO ]: Finished minimizeSevpa. Reduced states from 148 to 75. [2018-06-22 01:17:43,610 INFO ]: Start removeUnreachable. Operand 75 states. [2018-06-22 01:17:43,610 INFO ]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2018-06-22 01:17:43,610 INFO ]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 18 [2018-06-22 01:17:43,610 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:43,610 INFO ]: Abstraction has 75 states and 101 transitions. [2018-06-22 01:17:43,611 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:43,611 INFO ]: Start isEmpty. Operand 75 states and 101 transitions. [2018-06-22 01:17:43,611 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:43,611 INFO ]: Found error trace [2018-06-22 01:17:43,611 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:43,611 INFO ]: === Iteration 34 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:43,611 INFO ]: Analyzing trace with hash -1802091078, now seen corresponding path program 2 times [2018-06-22 01:17:43,611 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:43,611 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:43,612 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:43,612 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:43,612 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:43,618 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:43,777 INFO ]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:43,777 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:43,777 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:43,784 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:43,828 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:43,828 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:43,830 INFO ]: Computing forward predicates... [2018-06-22 01:17:43,905 INFO ]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:43,924 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:43,924 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-06-22 01:17:43,924 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:17:43,924 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:17:43,924 INFO ]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:17:43,924 INFO ]: Start difference. First operand 75 states and 101 transitions. Second operand 14 states. [2018-06-22 01:17:44,146 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:44,146 INFO ]: Finished difference Result 110 states and 138 transitions. [2018-06-22 01:17:44,147 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 01:17:44,147 INFO ]: Start accepts. Automaton has 14 states. Word has length 18 [2018-06-22 01:17:44,147 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:44,147 INFO ]: With dead ends: 110 [2018-06-22 01:17:44,147 INFO ]: Without dead ends: 104 [2018-06-22 01:17:44,147 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:44,147 INFO ]: Start minimizeSevpa. Operand 104 states. [2018-06-22 01:17:44,149 INFO ]: Finished minimizeSevpa. Reduced states from 104 to 72. [2018-06-22 01:17:44,149 INFO ]: Start removeUnreachable. Operand 72 states. [2018-06-22 01:17:44,150 INFO ]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2018-06-22 01:17:44,150 INFO ]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 18 [2018-06-22 01:17:44,150 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:44,150 INFO ]: Abstraction has 72 states and 97 transitions. [2018-06-22 01:17:44,150 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:17:44,150 INFO ]: Start isEmpty. Operand 72 states and 97 transitions. [2018-06-22 01:17:44,150 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:44,150 INFO ]: Found error trace [2018-06-22 01:17:44,150 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:44,150 INFO ]: === Iteration 35 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:44,150 INFO ]: Analyzing trace with hash 1806236616, now seen corresponding path program 3 times [2018-06-22 01:17:44,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:44,151 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:44,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:44,151 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:44,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:44,158 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:44,472 INFO ]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:44,472 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:44,472 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:44,478 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:17:44,508 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 01:17:44,508 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:44,521 INFO ]: Computing forward predicates... [2018-06-22 01:17:44,546 INFO ]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:44,565 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:44,565 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-06-22 01:17:44,565 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:17:44,565 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:17:44,565 INFO ]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:17:44,565 INFO ]: Start difference. First operand 72 states and 97 transitions. Second operand 14 states. [2018-06-22 01:17:44,805 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:44,805 INFO ]: Finished difference Result 95 states and 121 transitions. [2018-06-22 01:17:44,805 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 01:17:44,805 INFO ]: Start accepts. Automaton has 14 states. Word has length 18 [2018-06-22 01:17:44,805 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:44,806 INFO ]: With dead ends: 95 [2018-06-22 01:17:44,806 INFO ]: Without dead ends: 89 [2018-06-22 01:17:44,806 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:44,806 INFO ]: Start minimizeSevpa. Operand 89 states. [2018-06-22 01:17:44,808 INFO ]: Finished minimizeSevpa. Reduced states from 89 to 72. [2018-06-22 01:17:44,808 INFO ]: Start removeUnreachable. Operand 72 states. [2018-06-22 01:17:44,809 INFO ]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2018-06-22 01:17:44,809 INFO ]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 18 [2018-06-22 01:17:44,809 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:44,809 INFO ]: Abstraction has 72 states and 96 transitions. [2018-06-22 01:17:44,809 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:17:44,809 INFO ]: Start isEmpty. Operand 72 states and 96 transitions. [2018-06-22 01:17:44,809 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-22 01:17:44,809 INFO ]: Found error trace [2018-06-22 01:17:44,809 INFO ]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:44,809 INFO ]: === Iteration 36 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:44,809 INFO ]: Analyzing trace with hash 1995245434, now seen corresponding path program 7 times [2018-06-22 01:17:44,809 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:44,809 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:44,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:44,810 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:44,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:44,817 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:45,168 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:45,168 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:45,215 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:45,221 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:45,250 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:45,252 INFO ]: Computing forward predicates... [2018-06-22 01:17:45,286 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:45,305 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:45,305 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-06-22 01:17:45,305 INFO ]: Interpolant automaton has 14 states [2018-06-22 01:17:45,305 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 01:17:45,305 INFO ]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-06-22 01:17:45,305 INFO ]: Start difference. First operand 72 states and 96 transitions. Second operand 14 states. [2018-06-22 01:17:45,551 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:45,551 INFO ]: Finished difference Result 91 states and 118 transitions. [2018-06-22 01:17:45,551 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 01:17:45,551 INFO ]: Start accepts. Automaton has 14 states. Word has length 18 [2018-06-22 01:17:45,551 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:45,552 INFO ]: With dead ends: 91 [2018-06-22 01:17:45,552 INFO ]: Without dead ends: 90 [2018-06-22 01:17:45,552 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:45,552 INFO ]: Start minimizeSevpa. Operand 90 states. [2018-06-22 01:17:45,553 INFO ]: Finished minimizeSevpa. Reduced states from 90 to 75. [2018-06-22 01:17:45,553 INFO ]: Start removeUnreachable. Operand 75 states. [2018-06-22 01:17:45,554 INFO ]: Finished removeUnreachable. Reduced from 75 states to 75 states and 100 transitions. [2018-06-22 01:17:45,554 INFO ]: Start accepts. Automaton has 75 states and 100 transitions. Word has length 18 [2018-06-22 01:17:45,554 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:45,554 INFO ]: Abstraction has 75 states and 100 transitions. [2018-06-22 01:17:45,554 INFO ]: Interpolant automaton has 14 states. [2018-06-22 01:17:45,554 INFO ]: Start isEmpty. Operand 75 states and 100 transitions. [2018-06-22 01:17:45,554 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-22 01:17:45,554 INFO ]: Found error trace [2018-06-22 01:17:45,554 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:45,554 INFO ]: === Iteration 37 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:45,554 INFO ]: Analyzing trace with hash 1725004482, now seen corresponding path program 8 times [2018-06-22 01:17:45,554 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:45,554 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:45,554 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:45,554 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:45,554 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:45,560 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:45,649 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:45,649 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:45,649 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:45,655 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:45,683 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:45,683 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:45,684 INFO ]: Computing forward predicates... [2018-06-22 01:17:45,731 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:45,749 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:45,749 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 01:17:45,749 INFO ]: Interpolant automaton has 17 states [2018-06-22 01:17:45,750 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 01:17:45,750 INFO ]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-06-22 01:17:45,750 INFO ]: Start difference. First operand 75 states and 100 transitions. Second operand 17 states. [2018-06-22 01:17:45,862 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:45,862 INFO ]: Finished difference Result 137 states and 174 transitions. [2018-06-22 01:17:45,862 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 01:17:45,862 INFO ]: Start accepts. Automaton has 17 states. Word has length 19 [2018-06-22 01:17:45,862 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:45,863 INFO ]: With dead ends: 137 [2018-06-22 01:17:45,863 INFO ]: Without dead ends: 130 [2018-06-22 01:17:45,863 INFO ]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2018-06-22 01:17:45,863 INFO ]: Start minimizeSevpa. Operand 130 states. [2018-06-22 01:17:45,866 INFO ]: Finished minimizeSevpa. Reduced states from 130 to 81. [2018-06-22 01:17:45,866 INFO ]: Start removeUnreachable. Operand 81 states. [2018-06-22 01:17:45,866 INFO ]: Finished removeUnreachable. Reduced from 81 states to 81 states and 108 transitions. [2018-06-22 01:17:45,866 INFO ]: Start accepts. Automaton has 81 states and 108 transitions. Word has length 19 [2018-06-22 01:17:45,866 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:45,867 INFO ]: Abstraction has 81 states and 108 transitions. [2018-06-22 01:17:45,867 INFO ]: Interpolant automaton has 17 states. [2018-06-22 01:17:45,867 INFO ]: Start isEmpty. Operand 81 states and 108 transitions. [2018-06-22 01:17:45,867 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-22 01:17:45,867 INFO ]: Found error trace [2018-06-22 01:17:45,867 INFO ]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:45,867 INFO ]: === Iteration 38 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:45,867 INFO ]: Analyzing trace with hash 1835827002, now seen corresponding path program 10 times [2018-06-22 01:17:45,867 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:45,867 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:45,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:45,868 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:45,868 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:45,875 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:46,106 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:46,106 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:46,106 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:46,123 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:46,151 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:46,151 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:46,153 INFO ]: Computing forward predicates... [2018-06-22 01:17:46,269 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:46,288 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:46,288 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2018-06-22 01:17:46,288 INFO ]: Interpolant automaton has 23 states [2018-06-22 01:17:46,288 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 01:17:46,288 INFO ]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2018-06-22 01:17:46,288 INFO ]: Start difference. First operand 81 states and 108 transitions. Second operand 23 states. [2018-06-22 01:17:46,641 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:46,641 INFO ]: Finished difference Result 182 states and 232 transitions. [2018-06-22 01:17:46,641 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 01:17:46,641 INFO ]: Start accepts. Automaton has 23 states. Word has length 19 [2018-06-22 01:17:46,641 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:46,641 INFO ]: With dead ends: 182 [2018-06-22 01:17:46,641 INFO ]: Without dead ends: 181 [2018-06-22 01:17:46,642 INFO ]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 01:17:46,642 INFO ]: Start minimizeSevpa. Operand 181 states. [2018-06-22 01:17:46,644 INFO ]: Finished minimizeSevpa. Reduced states from 181 to 90. [2018-06-22 01:17:46,644 INFO ]: Start removeUnreachable. Operand 90 states. [2018-06-22 01:17:46,645 INFO ]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2018-06-22 01:17:46,645 INFO ]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 19 [2018-06-22 01:17:46,645 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:46,645 INFO ]: Abstraction has 90 states and 122 transitions. [2018-06-22 01:17:46,645 INFO ]: Interpolant automaton has 23 states. [2018-06-22 01:17:46,645 INFO ]: Start isEmpty. Operand 90 states and 122 transitions. [2018-06-22 01:17:46,645 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-22 01:17:46,645 INFO ]: Found error trace [2018-06-22 01:17:46,645 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:46,645 INFO ]: === Iteration 39 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:46,645 INFO ]: Analyzing trace with hash -378582526, now seen corresponding path program 9 times [2018-06-22 01:17:46,645 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:46,645 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:46,646 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:46,646 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:46,646 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:46,653 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:48,216 INFO ]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:48,216 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:48,216 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 01:17:48,231 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:48,303 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 01:17:48,303 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:48,305 INFO ]: Computing forward predicates... [2018-06-22 01:17:48,932 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:48,951 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:48,951 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-06-22 01:17:48,951 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:17:48,951 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:17:48,951 INFO ]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:17:48,952 INFO ]: Start difference. First operand 90 states and 122 transitions. Second operand 18 states. [2018-06-22 01:17:49,141 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:49,141 INFO ]: Finished difference Result 152 states and 193 transitions. [2018-06-22 01:17:49,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 01:17:49,142 INFO ]: Start accepts. Automaton has 18 states. Word has length 19 [2018-06-22 01:17:49,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:49,143 INFO ]: With dead ends: 152 [2018-06-22 01:17:49,143 INFO ]: Without dead ends: 137 [2018-06-22 01:17:49,143 INFO ]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=864, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 01:17:49,143 INFO ]: Start minimizeSevpa. Operand 137 states. [2018-06-22 01:17:49,145 INFO ]: Finished minimizeSevpa. Reduced states from 137 to 91. [2018-06-22 01:17:49,145 INFO ]: Start removeUnreachable. Operand 91 states. [2018-06-22 01:17:49,146 INFO ]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2018-06-22 01:17:49,146 INFO ]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 19 [2018-06-22 01:17:49,146 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:49,146 INFO ]: Abstraction has 91 states and 121 transitions. [2018-06-22 01:17:49,146 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:17:49,146 INFO ]: Start isEmpty. Operand 91 states and 121 transitions. [2018-06-22 01:17:49,147 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-22 01:17:49,147 INFO ]: Found error trace [2018-06-22 01:17:49,147 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:49,147 INFO ]: === Iteration 40 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:49,147 INFO ]: Analyzing trace with hash 1776595136, now seen corresponding path program 8 times [2018-06-22 01:17:49,147 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:49,147 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:49,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:49,147 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:49,147 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:49,154 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:49,300 INFO ]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:49,300 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:49,300 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:49,305 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:17:49,335 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:49,335 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:49,336 INFO ]: Computing forward predicates... [2018-06-22 01:17:49,380 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:49,399 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:49,399 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2018-06-22 01:17:49,400 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:49,400 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:49,400 INFO ]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:49,400 INFO ]: Start difference. First operand 91 states and 121 transitions. Second operand 16 states. [2018-06-22 01:17:49,662 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:49,662 INFO ]: Finished difference Result 166 states and 211 transitions. [2018-06-22 01:17:49,662 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 01:17:49,662 INFO ]: Start accepts. Automaton has 16 states. Word has length 19 [2018-06-22 01:17:49,662 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:49,662 INFO ]: With dead ends: 166 [2018-06-22 01:17:49,662 INFO ]: Without dead ends: 160 [2018-06-22 01:17:49,663 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=287, Invalid=835, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 01:17:49,663 INFO ]: Start minimizeSevpa. Operand 160 states. [2018-06-22 01:17:49,664 INFO ]: Finished minimizeSevpa. Reduced states from 160 to 103. [2018-06-22 01:17:49,664 INFO ]: Start removeUnreachable. Operand 103 states. [2018-06-22 01:17:49,665 INFO ]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2018-06-22 01:17:49,665 INFO ]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 19 [2018-06-22 01:17:49,665 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:49,665 INFO ]: Abstraction has 103 states and 137 transitions. [2018-06-22 01:17:49,665 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:49,665 INFO ]: Start isEmpty. Operand 103 states and 137 transitions. [2018-06-22 01:17:49,665 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-22 01:17:49,665 INFO ]: Found error trace [2018-06-22 01:17:49,665 INFO ]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:49,666 INFO ]: === Iteration 41 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:49,666 INFO ]: Analyzing trace with hash 674072498, now seen corresponding path program 9 times [2018-06-22 01:17:49,666 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:49,666 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:49,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:49,666 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:49,666 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:49,672 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:49,724 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:49,724 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:49,724 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:49,730 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:17:49,760 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 01:17:49,760 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:49,761 INFO ]: Computing forward predicates... [2018-06-22 01:17:49,793 INFO ]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:49,812 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:49,812 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-22 01:17:49,812 INFO ]: Interpolant automaton has 15 states [2018-06-22 01:17:49,813 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 01:17:49,813 INFO ]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2018-06-22 01:17:49,813 INFO ]: Start difference. First operand 103 states and 137 transitions. Second operand 15 states. [2018-06-22 01:17:50,097 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 01:17:50,768 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 01:17:50,985 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:50,985 INFO ]: Finished difference Result 146 states and 189 transitions. [2018-06-22 01:17:50,985 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 01:17:50,985 INFO ]: Start accepts. Automaton has 15 states. Word has length 19 [2018-06-22 01:17:50,985 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:50,986 INFO ]: With dead ends: 146 [2018-06-22 01:17:50,986 INFO ]: Without dead ends: 146 [2018-06-22 01:17:50,986 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:17:50,986 INFO ]: Start minimizeSevpa. Operand 146 states. [2018-06-22 01:17:50,988 INFO ]: Finished minimizeSevpa. Reduced states from 146 to 104. [2018-06-22 01:17:50,988 INFO ]: Start removeUnreachable. Operand 104 states. [2018-06-22 01:17:50,989 INFO ]: Finished removeUnreachable. Reduced from 104 states to 104 states and 138 transitions. [2018-06-22 01:17:50,989 INFO ]: Start accepts. Automaton has 104 states and 138 transitions. Word has length 19 [2018-06-22 01:17:50,989 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:50,989 INFO ]: Abstraction has 104 states and 138 transitions. [2018-06-22 01:17:50,989 INFO ]: Interpolant automaton has 15 states. [2018-06-22 01:17:50,989 INFO ]: Start isEmpty. Operand 104 states and 138 transitions. [2018-06-22 01:17:50,989 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:50,989 INFO ]: Found error trace [2018-06-22 01:17:50,989 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:50,989 INFO ]: === Iteration 42 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:50,990 INFO ]: Analyzing trace with hash -1179999936, now seen corresponding path program 11 times [2018-06-22 01:17:50,990 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:50,990 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:50,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:50,992 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:50,992 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:51,000 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:51,822 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:51,822 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:51,822 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:51,828 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:51,861 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 01:17:51,861 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:51,862 INFO ]: Computing forward predicates... [2018-06-22 01:17:51,911 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:51,931 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:51,931 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-06-22 01:17:51,931 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:17:51,931 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:17:51,931 INFO ]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:17:51,931 INFO ]: Start difference. First operand 104 states and 138 transitions. Second operand 18 states. [2018-06-22 01:17:52,099 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:52,099 INFO ]: Finished difference Result 222 states and 278 transitions. [2018-06-22 01:17:52,099 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 01:17:52,099 INFO ]: Start accepts. Automaton has 18 states. Word has length 20 [2018-06-22 01:17:52,099 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:52,099 INFO ]: With dead ends: 222 [2018-06-22 01:17:52,099 INFO ]: Without dead ends: 222 [2018-06-22 01:17:52,100 INFO ]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-06-22 01:17:52,100 INFO ]: Start minimizeSevpa. Operand 222 states. [2018-06-22 01:17:52,102 INFO ]: Finished minimizeSevpa. Reduced states from 222 to 97. [2018-06-22 01:17:52,102 INFO ]: Start removeUnreachable. Operand 97 states. [2018-06-22 01:17:52,103 INFO ]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2018-06-22 01:17:52,103 INFO ]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 20 [2018-06-22 01:17:52,103 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:52,103 INFO ]: Abstraction has 97 states and 127 transitions. [2018-06-22 01:17:52,103 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:17:52,103 INFO ]: Start isEmpty. Operand 97 states and 127 transitions. [2018-06-22 01:17:52,103 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:52,103 INFO ]: Found error trace [2018-06-22 01:17:52,104 INFO ]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:52,104 INFO ]: === Iteration 43 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:52,104 INFO ]: Analyzing trace with hash 900557832, now seen corresponding path program 10 times [2018-06-22 01:17:52,104 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:52,104 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:52,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:52,104 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:52,104 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:52,112 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:52,604 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:52,605 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:52,605 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:52,614 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:52,644 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:52,644 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:52,646 INFO ]: Computing forward predicates... [2018-06-22 01:17:52,782 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:52,808 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:52,808 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2018-06-22 01:17:52,808 INFO ]: Interpolant automaton has 25 states [2018-06-22 01:17:52,808 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 01:17:52,808 INFO ]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:17:52,808 INFO ]: Start difference. First operand 97 states and 127 transitions. Second operand 25 states. [2018-06-22 01:17:53,156 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:53,157 INFO ]: Finished difference Result 212 states and 262 transitions. [2018-06-22 01:17:53,157 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:53,157 INFO ]: Start accepts. Automaton has 25 states. Word has length 20 [2018-06-22 01:17:53,157 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:53,157 INFO ]: With dead ends: 212 [2018-06-22 01:17:53,157 INFO ]: Without dead ends: 210 [2018-06-22 01:17:53,158 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 01:17:53,158 INFO ]: Start minimizeSevpa. Operand 210 states. [2018-06-22 01:17:53,160 INFO ]: Finished minimizeSevpa. Reduced states from 210 to 104. [2018-06-22 01:17:53,160 INFO ]: Start removeUnreachable. Operand 104 states. [2018-06-22 01:17:53,161 INFO ]: Finished removeUnreachable. Reduced from 104 states to 104 states and 137 transitions. [2018-06-22 01:17:53,161 INFO ]: Start accepts. Automaton has 104 states and 137 transitions. Word has length 20 [2018-06-22 01:17:53,161 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:53,161 INFO ]: Abstraction has 104 states and 137 transitions. [2018-06-22 01:17:53,161 INFO ]: Interpolant automaton has 25 states. [2018-06-22 01:17:53,161 INFO ]: Start isEmpty. Operand 104 states and 137 transitions. [2018-06-22 01:17:53,161 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:53,161 INFO ]: Found error trace [2018-06-22 01:17:53,161 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:53,161 INFO ]: === Iteration 44 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:53,162 INFO ]: Analyzing trace with hash 1011380352, now seen corresponding path program 12 times [2018-06-22 01:17:53,162 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:53,162 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:53,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:53,162 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:53,162 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:53,168 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:53,630 INFO ]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:53,630 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:53,630 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:53,641 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:17:53,674 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 01:17:53,674 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:53,676 INFO ]: Computing forward predicates... [2018-06-22 01:17:53,788 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:53,807 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:53,807 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 01:17:53,807 INFO ]: Interpolant automaton has 19 states [2018-06-22 01:17:53,807 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 01:17:53,807 INFO ]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:17:53,808 INFO ]: Start difference. First operand 104 states and 137 transitions. Second operand 19 states. [2018-06-22 01:17:54,175 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:54,175 INFO ]: Finished difference Result 225 states and 278 transitions. [2018-06-22 01:17:54,176 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-06-22 01:17:54,176 INFO ]: Start accepts. Automaton has 19 states. Word has length 20 [2018-06-22 01:17:54,176 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:54,177 INFO ]: With dead ends: 225 [2018-06-22 01:17:54,177 INFO ]: Without dead ends: 218 [2018-06-22 01:17:54,177 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 01:17:54,178 INFO ]: Start minimizeSevpa. Operand 218 states. [2018-06-22 01:17:54,181 INFO ]: Finished minimizeSevpa. Reduced states from 218 to 105. [2018-06-22 01:17:54,181 INFO ]: Start removeUnreachable. Operand 105 states. [2018-06-22 01:17:54,182 INFO ]: Finished removeUnreachable. Reduced from 105 states to 105 states and 138 transitions. [2018-06-22 01:17:54,182 INFO ]: Start accepts. Automaton has 105 states and 138 transitions. Word has length 20 [2018-06-22 01:17:54,182 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:54,182 INFO ]: Abstraction has 105 states and 138 transitions. [2018-06-22 01:17:54,182 INFO ]: Interpolant automaton has 19 states. [2018-06-22 01:17:54,182 INFO ]: Start isEmpty. Operand 105 states and 138 transitions. [2018-06-22 01:17:54,182 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:54,182 INFO ]: Found error trace [2018-06-22 01:17:54,182 INFO ]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:54,183 INFO ]: === Iteration 45 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:54,183 INFO ]: Analyzing trace with hash 1918585078, now seen corresponding path program 4 times [2018-06-22 01:17:54,183 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:54,183 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:54,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:54,183 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:54,183 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:54,190 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:54,473 INFO ]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:54,473 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:54,473 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:54,478 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:54,510 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:54,510 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:54,513 INFO ]: Computing forward predicates... [2018-06-22 01:17:54,622 INFO ]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:54,642 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:54,642 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-06-22 01:17:54,643 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:54,643 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:54,643 INFO ]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:54,643 INFO ]: Start difference. First operand 105 states and 138 transitions. Second operand 16 states. [2018-06-22 01:17:55,443 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:55,443 INFO ]: Finished difference Result 166 states and 202 transitions. [2018-06-22 01:17:55,444 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:55,444 INFO ]: Start accepts. Automaton has 16 states. Word has length 20 [2018-06-22 01:17:55,444 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:55,444 INFO ]: With dead ends: 166 [2018-06-22 01:17:55,444 INFO ]: Without dead ends: 159 [2018-06-22 01:17:55,444 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2018-06-22 01:17:55,444 INFO ]: Start minimizeSevpa. Operand 159 states. [2018-06-22 01:17:55,446 INFO ]: Finished minimizeSevpa. Reduced states from 159 to 101. [2018-06-22 01:17:55,446 INFO ]: Start removeUnreachable. Operand 101 states. [2018-06-22 01:17:55,447 INFO ]: Finished removeUnreachable. Reduced from 101 states to 101 states and 133 transitions. [2018-06-22 01:17:55,447 INFO ]: Start accepts. Automaton has 101 states and 133 transitions. Word has length 20 [2018-06-22 01:17:55,447 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:55,447 INFO ]: Abstraction has 101 states and 133 transitions. [2018-06-22 01:17:55,447 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:55,447 INFO ]: Start isEmpty. Operand 101 states and 133 transitions. [2018-06-22 01:17:55,447 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:55,447 INFO ]: Found error trace [2018-06-22 01:17:55,447 INFO ]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:55,447 INFO ]: === Iteration 46 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:55,447 INFO ]: Analyzing trace with hash -882308664, now seen corresponding path program 5 times [2018-06-22 01:17:55,447 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:55,447 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:55,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:55,448 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:55,448 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:55,454 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:56,013 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:56,013 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:56,013 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:56,018 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:56,052 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:17:56,052 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:56,054 INFO ]: Computing forward predicates... [2018-06-22 01:17:56,082 INFO ]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:56,103 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:56,103 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-06-22 01:17:56,103 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:56,103 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:56,103 INFO ]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:56,103 INFO ]: Start difference. First operand 101 states and 133 transitions. Second operand 16 states. [2018-06-22 01:17:56,430 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:56,430 INFO ]: Finished difference Result 151 states and 185 transitions. [2018-06-22 01:17:56,431 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:56,431 INFO ]: Start accepts. Automaton has 16 states. Word has length 20 [2018-06-22 01:17:56,431 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:56,431 INFO ]: With dead ends: 151 [2018-06-22 01:17:56,431 INFO ]: Without dead ends: 144 [2018-06-22 01:17:56,432 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2018-06-22 01:17:56,432 INFO ]: Start minimizeSevpa. Operand 144 states. [2018-06-22 01:17:56,434 INFO ]: Finished minimizeSevpa. Reduced states from 144 to 101. [2018-06-22 01:17:56,434 INFO ]: Start removeUnreachable. Operand 101 states. [2018-06-22 01:17:56,434 INFO ]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2018-06-22 01:17:56,434 INFO ]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 20 [2018-06-22 01:17:56,434 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:56,434 INFO ]: Abstraction has 101 states and 132 transitions. [2018-06-22 01:17:56,435 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:56,435 INFO ]: Start isEmpty. Operand 101 states and 132 transitions. [2018-06-22 01:17:56,435 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:56,435 INFO ]: Found error trace [2018-06-22 01:17:56,435 INFO ]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:56,435 INFO ]: === Iteration 47 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:56,435 INFO ]: Analyzing trace with hash -1810668746, now seen corresponding path program 6 times [2018-06-22 01:17:56,435 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:56,435 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:56,436 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:56,436 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:56,436 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:56,444 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:56,891 INFO ]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:56,891 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:56,891 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:56,897 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:17:56,929 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-06-22 01:17:56,929 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:56,932 INFO ]: Computing forward predicates... [2018-06-22 01:17:57,102 INFO ]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:57,122 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:57,122 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-06-22 01:17:57,122 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:57,122 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:57,122 INFO ]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:57,122 INFO ]: Start difference. First operand 101 states and 132 transitions. Second operand 16 states. [2018-06-22 01:17:57,398 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:57,398 INFO ]: Finished difference Result 127 states and 159 transitions. [2018-06-22 01:17:57,398 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:57,398 INFO ]: Start accepts. Automaton has 16 states. Word has length 20 [2018-06-22 01:17:57,398 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:57,399 INFO ]: With dead ends: 127 [2018-06-22 01:17:57,399 INFO ]: Without dead ends: 120 [2018-06-22 01:17:57,399 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2018-06-22 01:17:57,399 INFO ]: Start minimizeSevpa. Operand 120 states. [2018-06-22 01:17:57,401 INFO ]: Finished minimizeSevpa. Reduced states from 120 to 101. [2018-06-22 01:17:57,401 INFO ]: Start removeUnreachable. Operand 101 states. [2018-06-22 01:17:57,401 INFO ]: Finished removeUnreachable. Reduced from 101 states to 101 states and 131 transitions. [2018-06-22 01:17:57,401 INFO ]: Start accepts. Automaton has 101 states and 131 transitions. Word has length 20 [2018-06-22 01:17:57,401 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:57,401 INFO ]: Abstraction has 101 states and 131 transitions. [2018-06-22 01:17:57,401 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:57,401 INFO ]: Start isEmpty. Operand 101 states and 131 transitions. [2018-06-22 01:17:57,402 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-22 01:17:57,402 INFO ]: Found error trace [2018-06-22 01:17:57,402 INFO ]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:57,402 INFO ]: === Iteration 48 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:57,402 INFO ]: Analyzing trace with hash -525060216, now seen corresponding path program 10 times [2018-06-22 01:17:57,402 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:57,402 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:57,403 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:57,403 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:57,403 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:57,410 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:57,690 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:57,690 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:57,690 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:57,708 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:17:57,739 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:17:57,739 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:57,741 INFO ]: Computing forward predicates... [2018-06-22 01:17:57,772 INFO ]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:57,790 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:57,790 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2018-06-22 01:17:57,791 INFO ]: Interpolant automaton has 16 states [2018-06-22 01:17:57,791 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 01:17:57,791 INFO ]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-06-22 01:17:57,791 INFO ]: Start difference. First operand 101 states and 131 transitions. Second operand 16 states. [2018-06-22 01:17:58,074 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:58,074 INFO ]: Finished difference Result 122 states and 155 transitions. [2018-06-22 01:17:58,074 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:17:58,074 INFO ]: Start accepts. Automaton has 16 states. Word has length 20 [2018-06-22 01:17:58,074 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:58,074 INFO ]: With dead ends: 122 [2018-06-22 01:17:58,074 INFO ]: Without dead ends: 121 [2018-06-22 01:17:58,075 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2018-06-22 01:17:58,075 INFO ]: Start minimizeSevpa. Operand 121 states. [2018-06-22 01:17:58,077 INFO ]: Finished minimizeSevpa. Reduced states from 121 to 104. [2018-06-22 01:17:58,077 INFO ]: Start removeUnreachable. Operand 104 states. [2018-06-22 01:17:58,077 INFO ]: Finished removeUnreachable. Reduced from 104 states to 104 states and 135 transitions. [2018-06-22 01:17:58,077 INFO ]: Start accepts. Automaton has 104 states and 135 transitions. Word has length 20 [2018-06-22 01:17:58,077 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:58,077 INFO ]: Abstraction has 104 states and 135 transitions. [2018-06-22 01:17:58,077 INFO ]: Interpolant automaton has 16 states. [2018-06-22 01:17:58,077 INFO ]: Start isEmpty. Operand 104 states and 135 transitions. [2018-06-22 01:17:58,077 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 01:17:58,077 INFO ]: Found error trace [2018-06-22 01:17:58,077 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:58,078 INFO ]: === Iteration 49 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:58,078 INFO ]: Analyzing trace with hash 1899203266, now seen corresponding path program 11 times [2018-06-22 01:17:58,078 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:58,078 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:58,078 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:58,078 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:58,078 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:58,084 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:59,116 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:59,116 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:59,116 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:59,124 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:17:59,159 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 01:17:59,159 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:59,161 INFO ]: Computing forward predicates... [2018-06-22 01:17:59,217 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:59,235 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:59,235 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 01:17:59,235 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:17:59,236 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:17:59,236 INFO ]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:17:59,236 INFO ]: Start difference. First operand 104 states and 135 transitions. Second operand 20 states. [2018-06-22 01:17:59,354 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:17:59,354 INFO ]: Finished difference Result 202 states and 249 transitions. [2018-06-22 01:17:59,354 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 01:17:59,354 INFO ]: Start accepts. Automaton has 20 states. Word has length 21 [2018-06-22 01:17:59,354 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:17:59,354 INFO ]: With dead ends: 202 [2018-06-22 01:17:59,354 INFO ]: Without dead ends: 193 [2018-06-22 01:17:59,355 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2018-06-22 01:17:59,355 INFO ]: Start minimizeSevpa. Operand 193 states. [2018-06-22 01:17:59,357 INFO ]: Finished minimizeSevpa. Reduced states from 193 to 112. [2018-06-22 01:17:59,357 INFO ]: Start removeUnreachable. Operand 112 states. [2018-06-22 01:17:59,358 INFO ]: Finished removeUnreachable. Reduced from 112 states to 112 states and 146 transitions. [2018-06-22 01:17:59,358 INFO ]: Start accepts. Automaton has 112 states and 146 transitions. Word has length 21 [2018-06-22 01:17:59,358 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:17:59,358 INFO ]: Abstraction has 112 states and 146 transitions. [2018-06-22 01:17:59,358 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:17:59,358 INFO ]: Start isEmpty. Operand 112 states and 146 transitions. [2018-06-22 01:17:59,358 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 01:17:59,358 INFO ]: Found error trace [2018-06-22 01:17:59,358 INFO ]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:17:59,358 INFO ]: === Iteration 50 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:17:59,358 INFO ]: Analyzing trace with hash 2010025786, now seen corresponding path program 13 times [2018-06-22 01:17:59,358 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:17:59,359 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:17:59,359 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:59,359 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:17:59,359 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:17:59,366 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:59,566 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:59,566 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:17:59,566 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:17:59,571 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:17:59,603 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:17:59,606 INFO ]: Computing forward predicates... [2018-06-22 01:17:59,767 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:17:59,787 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:17:59,787 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2018-06-22 01:17:59,787 INFO ]: Interpolant automaton has 26 states [2018-06-22 01:17:59,787 INFO ]: Constructing interpolant automaton starting with 26 interpolants. [2018-06-22 01:17:59,787 INFO ]: CoverageRelationStatistics Valid=58, Invalid=592, Unknown=0, NotChecked=0, Total=650 [2018-06-22 01:17:59,787 INFO ]: Start difference. First operand 112 states and 146 transitions. Second operand 26 states. [2018-06-22 01:18:00,269 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:00,269 INFO ]: Finished difference Result 259 states and 320 transitions. [2018-06-22 01:18:00,270 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 01:18:00,270 INFO ]: Start accepts. Automaton has 26 states. Word has length 21 [2018-06-22 01:18:00,270 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:00,270 INFO ]: With dead ends: 259 [2018-06-22 01:18:00,270 INFO ]: Without dead ends: 258 [2018-06-22 01:18:00,271 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1389, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 01:18:00,271 INFO ]: Start minimizeSevpa. Operand 258 states. [2018-06-22 01:18:00,274 INFO ]: Finished minimizeSevpa. Reduced states from 258 to 122. [2018-06-22 01:18:00,274 INFO ]: Start removeUnreachable. Operand 122 states. [2018-06-22 01:18:00,274 INFO ]: Finished removeUnreachable. Reduced from 122 states to 122 states and 161 transitions. [2018-06-22 01:18:00,274 INFO ]: Start accepts. Automaton has 122 states and 161 transitions. Word has length 21 [2018-06-22 01:18:00,274 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:00,274 INFO ]: Abstraction has 122 states and 161 transitions. [2018-06-22 01:18:00,274 INFO ]: Interpolant automaton has 26 states. [2018-06-22 01:18:00,274 INFO ]: Start isEmpty. Operand 122 states and 161 transitions. [2018-06-22 01:18:00,275 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 01:18:00,275 INFO ]: Found error trace [2018-06-22 01:18:00,275 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:00,275 INFO ]: === Iteration 51 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:00,275 INFO ]: Analyzing trace with hash 1112515458, now seen corresponding path program 12 times [2018-06-22 01:18:00,275 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:00,275 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:00,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:00,276 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:00,276 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:00,280 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:00,429 INFO ]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:00,429 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:00,429 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:00,434 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:18:00,470 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 01:18:00,470 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:00,472 INFO ]: Computing forward predicates... [2018-06-22 01:18:00,620 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:00,639 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:00,639 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-06-22 01:18:00,639 INFO ]: Interpolant automaton has 21 states [2018-06-22 01:18:00,640 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 01:18:00,640 INFO ]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2018-06-22 01:18:00,640 INFO ]: Start difference. First operand 122 states and 161 transitions. Second operand 21 states. [2018-06-22 01:18:00,895 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:00,895 INFO ]: Finished difference Result 219 states and 270 transitions. [2018-06-22 01:18:00,895 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-06-22 01:18:00,895 INFO ]: Start accepts. Automaton has 21 states. Word has length 21 [2018-06-22 01:18:00,895 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:00,896 INFO ]: With dead ends: 219 [2018-06-22 01:18:00,896 INFO ]: Without dead ends: 200 [2018-06-22 01:18:00,897 INFO ]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 01:18:00,897 INFO ]: Start minimizeSevpa. Operand 200 states. [2018-06-22 01:18:00,901 INFO ]: Finished minimizeSevpa. Reduced states from 200 to 124. [2018-06-22 01:18:00,901 INFO ]: Start removeUnreachable. Operand 124 states. [2018-06-22 01:18:00,901 INFO ]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2018-06-22 01:18:00,901 INFO ]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 21 [2018-06-22 01:18:00,901 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:00,901 INFO ]: Abstraction has 124 states and 161 transitions. [2018-06-22 01:18:00,901 INFO ]: Interpolant automaton has 21 states. [2018-06-22 01:18:00,901 INFO ]: Start isEmpty. Operand 124 states and 161 transitions. [2018-06-22 01:18:00,902 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 01:18:00,902 INFO ]: Found error trace [2018-06-22 01:18:00,902 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:00,902 INFO ]: === Iteration 52 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:00,902 INFO ]: Analyzing trace with hash 956531314, now seen corresponding path program 11 times [2018-06-22 01:18:00,902 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:00,902 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:00,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:00,904 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:00,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:00,910 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:01,010 INFO ]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:01,010 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:01,010 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:01,016 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:18:01,076 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 01:18:01,076 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:01,078 INFO ]: Computing forward predicates... [2018-06-22 01:18:01,152 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:01,173 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:01,173 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2018-06-22 01:18:01,173 INFO ]: Interpolant automaton has 19 states [2018-06-22 01:18:01,173 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 01:18:01,173 INFO ]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2018-06-22 01:18:01,173 INFO ]: Start difference. First operand 124 states and 161 transitions. Second operand 19 states. [2018-06-22 01:18:01,486 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:01,486 INFO ]: Finished difference Result 225 states and 281 transitions. [2018-06-22 01:18:01,486 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-06-22 01:18:01,486 INFO ]: Start accepts. Automaton has 19 states. Word has length 21 [2018-06-22 01:18:01,487 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:01,487 INFO ]: With dead ends: 225 [2018-06-22 01:18:01,487 INFO ]: Without dead ends: 218 [2018-06-22 01:18:01,488 INFO ]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 01:18:01,488 INFO ]: Start minimizeSevpa. Operand 218 states. [2018-06-22 01:18:01,490 INFO ]: Finished minimizeSevpa. Reduced states from 218 to 139. [2018-06-22 01:18:01,490 INFO ]: Start removeUnreachable. Operand 139 states. [2018-06-22 01:18:01,491 INFO ]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2018-06-22 01:18:01,491 INFO ]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 21 [2018-06-22 01:18:01,491 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:01,491 INFO ]: Abstraction has 139 states and 181 transitions. [2018-06-22 01:18:01,491 INFO ]: Interpolant automaton has 19 states. [2018-06-22 01:18:01,491 INFO ]: Start isEmpty. Operand 139 states and 181 transitions. [2018-06-22 01:18:01,491 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 01:18:01,491 INFO ]: Found error trace [2018-06-22 01:18:01,492 INFO ]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:01,492 INFO ]: === Iteration 53 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:01,492 INFO ]: Analyzing trace with hash 1138067904, now seen corresponding path program 12 times [2018-06-22 01:18:01,492 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:01,492 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:01,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,492 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:01,492 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,499 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:01,639 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:01,639 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:01,639 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:01,645 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:18:01,681 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 01:18:01,681 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:01,684 INFO ]: Computing forward predicates... [2018-06-22 01:18:01,731 INFO ]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:01,750 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:01,750 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2018-06-22 01:18:01,750 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:01,750 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:01,750 INFO ]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:01,751 INFO ]: Start difference. First operand 139 states and 181 transitions. Second operand 18 states. [2018-06-22 01:18:01,878 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:01,878 INFO ]: Finished difference Result 201 states and 255 transitions. [2018-06-22 01:18:01,878 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 01:18:01,878 INFO ]: Start accepts. Automaton has 18 states. Word has length 21 [2018-06-22 01:18:01,879 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:01,879 INFO ]: With dead ends: 201 [2018-06-22 01:18:01,879 INFO ]: Without dead ends: 201 [2018-06-22 01:18:01,879 INFO ]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2018-06-22 01:18:01,879 INFO ]: Start minimizeSevpa. Operand 201 states. [2018-06-22 01:18:01,882 INFO ]: Finished minimizeSevpa. Reduced states from 201 to 140. [2018-06-22 01:18:01,882 INFO ]: Start removeUnreachable. Operand 140 states. [2018-06-22 01:18:01,882 INFO ]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2018-06-22 01:18:01,882 INFO ]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 21 [2018-06-22 01:18:01,882 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:01,882 INFO ]: Abstraction has 140 states and 182 transitions. [2018-06-22 01:18:01,882 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:01,882 INFO ]: Start isEmpty. Operand 140 states and 182 transitions. [2018-06-22 01:18:01,883 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:01,884 INFO ]: Found error trace [2018-06-22 01:18:01,884 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:01,884 INFO ]: === Iteration 54 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:01,884 INFO ]: Analyzing trace with hash -1391704128, now seen corresponding path program 14 times [2018-06-22 01:18:01,884 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:01,884 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:01,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,884 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:01,884 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:01,894 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,134 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:02,134 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:02,134 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:02,140 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:18:02,176 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:18:02,176 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,178 INFO ]: Computing forward predicates... [2018-06-22 01:18:02,241 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:02,260 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:02,260 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-06-22 01:18:02,260 INFO ]: Interpolant automaton has 21 states [2018-06-22 01:18:02,260 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 01:18:02,260 INFO ]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2018-06-22 01:18:02,260 INFO ]: Start difference. First operand 140 states and 182 transitions. Second operand 21 states. [2018-06-22 01:18:02,467 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:02,467 INFO ]: Finished difference Result 312 states and 380 transitions. [2018-06-22 01:18:02,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 01:18:02,467 INFO ]: Start accepts. Automaton has 21 states. Word has length 22 [2018-06-22 01:18:02,468 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:02,469 INFO ]: With dead ends: 312 [2018-06-22 01:18:02,469 INFO ]: Without dead ends: 312 [2018-06-22 01:18:02,469 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2018-06-22 01:18:02,469 INFO ]: Start minimizeSevpa. Operand 312 states. [2018-06-22 01:18:02,472 INFO ]: Finished minimizeSevpa. Reduced states from 312 to 132. [2018-06-22 01:18:02,472 INFO ]: Start removeUnreachable. Operand 132 states. [2018-06-22 01:18:02,472 INFO ]: Finished removeUnreachable. Reduced from 132 states to 132 states and 170 transitions. [2018-06-22 01:18:02,472 INFO ]: Start accepts. Automaton has 132 states and 170 transitions. Word has length 22 [2018-06-22 01:18:02,472 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:02,472 INFO ]: Abstraction has 132 states and 170 transitions. [2018-06-22 01:18:02,472 INFO ]: Interpolant automaton has 21 states. [2018-06-22 01:18:02,472 INFO ]: Start isEmpty. Operand 132 states and 170 transitions. [2018-06-22 01:18:02,473 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:02,473 INFO ]: Found error trace [2018-06-22 01:18:02,473 INFO ]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:02,473 INFO ]: === Iteration 55 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:02,473 INFO ]: Analyzing trace with hash 2005752840, now seen corresponding path program 13 times [2018-06-22 01:18:02,473 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:02,473 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:02,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,474 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:02,474 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:02,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,952 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:02,952 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:02,952 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:02,957 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:02,991 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:02,994 INFO ]: Computing forward predicates... [2018-06-22 01:18:03,184 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:03,203 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:03,203 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2018-06-22 01:18:03,203 INFO ]: Interpolant automaton has 28 states [2018-06-22 01:18:03,203 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 01:18:03,203 INFO ]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2018-06-22 01:18:03,203 INFO ]: Start difference. First operand 132 states and 170 transitions. Second operand 28 states. [2018-06-22 01:18:03,687 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:03,687 INFO ]: Finished difference Result 299 states and 360 transitions. [2018-06-22 01:18:03,687 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:03,687 INFO ]: Start accepts. Automaton has 28 states. Word has length 22 [2018-06-22 01:18:03,687 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:03,688 INFO ]: With dead ends: 299 [2018-06-22 01:18:03,688 INFO ]: Without dead ends: 297 [2018-06-22 01:18:03,688 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=1613, Unknown=0, NotChecked=0, Total=1806 [2018-06-22 01:18:03,688 INFO ]: Start minimizeSevpa. Operand 297 states. [2018-06-22 01:18:03,691 INFO ]: Finished minimizeSevpa. Reduced states from 297 to 140. [2018-06-22 01:18:03,691 INFO ]: Start removeUnreachable. Operand 140 states. [2018-06-22 01:18:03,692 INFO ]: Finished removeUnreachable. Reduced from 140 states to 140 states and 181 transitions. [2018-06-22 01:18:03,692 INFO ]: Start accepts. Automaton has 140 states and 181 transitions. Word has length 22 [2018-06-22 01:18:03,692 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:03,692 INFO ]: Abstraction has 140 states and 181 transitions. [2018-06-22 01:18:03,692 INFO ]: Interpolant automaton has 28 states. [2018-06-22 01:18:03,692 INFO ]: Start isEmpty. Operand 140 states and 181 transitions. [2018-06-22 01:18:03,692 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:03,692 INFO ]: Found error trace [2018-06-22 01:18:03,692 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:03,692 INFO ]: === Iteration 56 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:03,692 INFO ]: Analyzing trace with hash 2116575360, now seen corresponding path program 15 times [2018-06-22 01:18:03,692 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:03,692 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:03,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:03,693 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:03,693 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:03,698 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:03,814 INFO ]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:03,814 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:03,814 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:03,820 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:18:03,858 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 01:18:03,858 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:03,860 INFO ]: Computing forward predicates... [2018-06-22 01:18:04,386 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:04,406 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:04,406 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 01:18:04,406 INFO ]: Interpolant automaton has 22 states [2018-06-22 01:18:04,406 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 01:18:04,406 INFO ]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-06-22 01:18:04,406 INFO ]: Start difference. First operand 140 states and 181 transitions. Second operand 22 states. [2018-06-22 01:18:04,751 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:04,751 INFO ]: Finished difference Result 315 states and 380 transitions. [2018-06-22 01:18:04,751 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-06-22 01:18:04,751 INFO ]: Start accepts. Automaton has 22 states. Word has length 22 [2018-06-22 01:18:04,751 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:04,752 INFO ]: With dead ends: 315 [2018-06-22 01:18:04,752 INFO ]: Without dead ends: 307 [2018-06-22 01:18:04,752 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=557, Invalid=1893, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 01:18:04,752 INFO ]: Start minimizeSevpa. Operand 307 states. [2018-06-22 01:18:04,754 INFO ]: Finished minimizeSevpa. Reduced states from 307 to 141. [2018-06-22 01:18:04,754 INFO ]: Start removeUnreachable. Operand 141 states. [2018-06-22 01:18:04,754 INFO ]: Finished removeUnreachable. Reduced from 141 states to 141 states and 182 transitions. [2018-06-22 01:18:04,754 INFO ]: Start accepts. Automaton has 141 states and 182 transitions. Word has length 22 [2018-06-22 01:18:04,754 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:04,754 INFO ]: Abstraction has 141 states and 182 transitions. [2018-06-22 01:18:04,754 INFO ]: Interpolant automaton has 22 states. [2018-06-22 01:18:04,754 INFO ]: Start isEmpty. Operand 141 states and 182 transitions. [2018-06-22 01:18:04,754 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:04,754 INFO ]: Found error trace [2018-06-22 01:18:04,754 INFO ]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:04,754 INFO ]: === Iteration 57 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:04,755 INFO ]: Analyzing trace with hash 909525946, now seen corresponding path program 7 times [2018-06-22 01:18:04,755 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:04,755 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:04,755 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:04,755 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:04,755 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:04,761 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:04,962 INFO ]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:04,962 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:04,962 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:04,968 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:05,003 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:05,005 INFO ]: Computing forward predicates... [2018-06-22 01:18:05,045 INFO ]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:05,064 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:05,064 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-06-22 01:18:05,064 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:05,064 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:05,064 INFO ]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:05,065 INFO ]: Start difference. First operand 141 states and 182 transitions. Second operand 18 states. [2018-06-22 01:18:05,452 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:05,452 INFO ]: Finished difference Result 239 states and 284 transitions. [2018-06-22 01:18:05,452 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:05,452 INFO ]: Start accepts. Automaton has 18 states. Word has length 22 [2018-06-22 01:18:05,452 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:05,453 INFO ]: With dead ends: 239 [2018-06-22 01:18:05,453 INFO ]: Without dead ends: 231 [2018-06-22 01:18:05,453 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:18:05,453 INFO ]: Start minimizeSevpa. Operand 231 states. [2018-06-22 01:18:05,455 INFO ]: Finished minimizeSevpa. Reduced states from 231 to 136. [2018-06-22 01:18:05,455 INFO ]: Start removeUnreachable. Operand 136 states. [2018-06-22 01:18:05,455 INFO ]: Finished removeUnreachable. Reduced from 136 states to 136 states and 176 transitions. [2018-06-22 01:18:05,456 INFO ]: Start accepts. Automaton has 136 states and 176 transitions. Word has length 22 [2018-06-22 01:18:05,456 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:05,456 INFO ]: Abstraction has 136 states and 176 transitions. [2018-06-22 01:18:05,456 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:05,456 INFO ]: Start isEmpty. Operand 136 states and 176 transitions. [2018-06-22 01:18:05,456 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:05,456 INFO ]: Found error trace [2018-06-22 01:18:05,456 INFO ]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:05,456 INFO ]: === Iteration 58 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:05,456 INFO ]: Analyzing trace with hash 1286230600, now seen corresponding path program 8 times [2018-06-22 01:18:05,456 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:05,456 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:05,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:05,457 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:05,457 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:05,463 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:06,069 INFO ]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:06,069 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:06,069 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 01:18:06,078 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:06,116 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:18:06,116 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:06,118 INFO ]: Computing forward predicates... [2018-06-22 01:18:06,164 INFO ]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:06,183 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:06,183 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-06-22 01:18:06,183 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:06,183 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:06,183 INFO ]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:06,183 INFO ]: Start difference. First operand 136 states and 176 transitions. Second operand 18 states. [2018-06-22 01:18:06,552 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:06,552 INFO ]: Finished difference Result 221 states and 264 transitions. [2018-06-22 01:18:06,552 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:06,552 INFO ]: Start accepts. Automaton has 18 states. Word has length 22 [2018-06-22 01:18:06,552 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:06,552 INFO ]: With dead ends: 221 [2018-06-22 01:18:06,553 INFO ]: Without dead ends: 213 [2018-06-22 01:18:06,553 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:18:06,553 INFO ]: Start minimizeSevpa. Operand 213 states. [2018-06-22 01:18:06,555 INFO ]: Finished minimizeSevpa. Reduced states from 213 to 136. [2018-06-22 01:18:06,555 INFO ]: Start removeUnreachable. Operand 136 states. [2018-06-22 01:18:06,555 INFO ]: Finished removeUnreachable. Reduced from 136 states to 136 states and 175 transitions. [2018-06-22 01:18:06,555 INFO ]: Start accepts. Automaton has 136 states and 175 transitions. Word has length 22 [2018-06-22 01:18:06,555 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:06,555 INFO ]: Abstraction has 136 states and 175 transitions. [2018-06-22 01:18:06,555 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:06,555 INFO ]: Start isEmpty. Operand 136 states and 175 transitions. [2018-06-22 01:18:06,556 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:06,556 INFO ]: Found error trace [2018-06-22 01:18:06,556 INFO ]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:06,556 INFO ]: === Iteration 59 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:06,556 INFO ]: Analyzing trace with hash 79172986, now seen corresponding path program 9 times [2018-06-22 01:18:06,556 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:06,556 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:06,556 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:06,556 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:06,556 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:06,563 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:06,730 INFO ]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:06,730 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:06,730 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:06,735 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:18:06,772 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 01:18:06,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:06,774 INFO ]: Computing forward predicates... [2018-06-22 01:18:06,804 INFO ]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:06,823 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:06,823 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-06-22 01:18:06,823 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:06,824 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:06,824 INFO ]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:06,824 INFO ]: Start difference. First operand 136 states and 175 transitions. Second operand 18 states. [2018-06-22 01:18:07,219 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:07,219 INFO ]: Finished difference Result 192 states and 233 transitions. [2018-06-22 01:18:07,219 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:07,219 INFO ]: Start accepts. Automaton has 18 states. Word has length 22 [2018-06-22 01:18:07,219 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:07,220 INFO ]: With dead ends: 192 [2018-06-22 01:18:07,220 INFO ]: Without dead ends: 184 [2018-06-22 01:18:07,220 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:18:07,220 INFO ]: Start minimizeSevpa. Operand 184 states. [2018-06-22 01:18:07,221 INFO ]: Finished minimizeSevpa. Reduced states from 184 to 136. [2018-06-22 01:18:07,221 INFO ]: Start removeUnreachable. Operand 136 states. [2018-06-22 01:18:07,222 INFO ]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2018-06-22 01:18:07,222 INFO ]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 22 [2018-06-22 01:18:07,222 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:07,222 INFO ]: Abstraction has 136 states and 174 transitions. [2018-06-22 01:18:07,222 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:07,222 INFO ]: Start isEmpty. Operand 136 states and 174 transitions. [2018-06-22 01:18:07,222 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:07,222 INFO ]: Found error trace [2018-06-22 01:18:07,222 INFO ]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:07,222 INFO ]: === Iteration 60 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:07,223 INFO ]: Analyzing trace with hash 1315092616, now seen corresponding path program 10 times [2018-06-22 01:18:07,223 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:07,223 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:07,223 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:07,223 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:07,223 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:07,230 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:07,947 INFO ]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:07,947 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:07,947 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:07,952 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:18:07,988 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:18:07,988 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:07,990 INFO ]: Computing forward predicates... [2018-06-22 01:18:08,711 INFO ]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:08,741 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:08,741 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-06-22 01:18:08,741 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:08,742 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:08,742 INFO ]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:08,742 INFO ]: Start difference. First operand 136 states and 174 transitions. Second operand 18 states. [2018-06-22 01:18:09,649 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:09,649 INFO ]: Finished difference Result 165 states and 204 transitions. [2018-06-22 01:18:09,649 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:09,649 INFO ]: Start accepts. Automaton has 18 states. Word has length 22 [2018-06-22 01:18:09,649 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:09,650 INFO ]: With dead ends: 165 [2018-06-22 01:18:09,650 INFO ]: Without dead ends: 157 [2018-06-22 01:18:09,650 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:18:09,650 INFO ]: Start minimizeSevpa. Operand 157 states. [2018-06-22 01:18:09,651 INFO ]: Finished minimizeSevpa. Reduced states from 157 to 136. [2018-06-22 01:18:09,651 INFO ]: Start removeUnreachable. Operand 136 states. [2018-06-22 01:18:09,651 INFO ]: Finished removeUnreachable. Reduced from 136 states to 136 states and 173 transitions. [2018-06-22 01:18:09,651 INFO ]: Start accepts. Automaton has 136 states and 173 transitions. Word has length 22 [2018-06-22 01:18:09,651 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:09,651 INFO ]: Abstraction has 136 states and 173 transitions. [2018-06-22 01:18:09,651 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:09,651 INFO ]: Start isEmpty. Operand 136 states and 173 transitions. [2018-06-22 01:18:09,651 INFO ]: Finished isEmpty. Found accepting run of length 23 [2018-06-22 01:18:09,651 INFO ]: Found error trace [2018-06-22 01:18:09,651 INFO ]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:09,652 INFO ]: === Iteration 61 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:09,652 INFO ]: Analyzing trace with hash 973895482, now seen corresponding path program 13 times [2018-06-22 01:18:09,652 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:09,652 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:09,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:09,652 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:09,652 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:09,657 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:09,965 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:09,965 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:09,965 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:09,971 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:10,005 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:10,007 INFO ]: Computing forward predicates... [2018-06-22 01:18:10,039 INFO ]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:10,058 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:10,058 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-06-22 01:18:10,058 INFO ]: Interpolant automaton has 18 states [2018-06-22 01:18:10,058 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 01:18:10,058 INFO ]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-06-22 01:18:10,058 INFO ]: Start difference. First operand 136 states and 173 transitions. Second operand 18 states. [2018-06-22 01:18:10,361 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:10,361 INFO ]: Finished difference Result 159 states and 199 transitions. [2018-06-22 01:18:10,362 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 01:18:10,362 INFO ]: Start accepts. Automaton has 18 states. Word has length 22 [2018-06-22 01:18:10,362 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:10,362 INFO ]: With dead ends: 159 [2018-06-22 01:18:10,362 INFO ]: Without dead ends: 158 [2018-06-22 01:18:10,362 INFO ]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 01:18:10,362 INFO ]: Start minimizeSevpa. Operand 158 states. [2018-06-22 01:18:10,363 INFO ]: Finished minimizeSevpa. Reduced states from 158 to 139. [2018-06-22 01:18:10,363 INFO ]: Start removeUnreachable. Operand 139 states. [2018-06-22 01:18:10,364 INFO ]: Finished removeUnreachable. Reduced from 139 states to 139 states and 177 transitions. [2018-06-22 01:18:10,364 INFO ]: Start accepts. Automaton has 139 states and 177 transitions. Word has length 22 [2018-06-22 01:18:10,364 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:10,364 INFO ]: Abstraction has 139 states and 177 transitions. [2018-06-22 01:18:10,364 INFO ]: Interpolant automaton has 18 states. [2018-06-22 01:18:10,364 INFO ]: Start isEmpty. Operand 139 states and 177 transitions. [2018-06-22 01:18:10,364 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 01:18:10,364 INFO ]: Found error trace [2018-06-22 01:18:10,364 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:10,364 INFO ]: === Iteration 62 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:10,364 INFO ]: Analyzing trace with hash -368659390, now seen corresponding path program 14 times [2018-06-22 01:18:10,364 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:10,364 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:10,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:10,364 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:10,364 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:10,370 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:10,646 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:10,646 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:10,646 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:10,652 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:18:10,714 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:18:10,714 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:10,717 INFO ]: Computing forward predicates... [2018-06-22 01:18:10,793 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:10,812 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:10,812 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2018-06-22 01:18:10,812 INFO ]: Interpolant automaton has 23 states [2018-06-22 01:18:10,813 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 01:18:10,813 INFO ]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2018-06-22 01:18:10,813 INFO ]: Start difference. First operand 139 states and 177 transitions. Second operand 23 states. [2018-06-22 01:18:10,971 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:10,971 INFO ]: Finished difference Result 285 states and 343 transitions. [2018-06-22 01:18:10,971 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 01:18:10,971 INFO ]: Start accepts. Automaton has 23 states. Word has length 23 [2018-06-22 01:18:10,971 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:10,972 INFO ]: With dead ends: 285 [2018-06-22 01:18:10,972 INFO ]: Without dead ends: 274 [2018-06-22 01:18:10,972 INFO ]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=679, Unknown=0, NotChecked=0, Total=930 [2018-06-22 01:18:10,972 INFO ]: Start minimizeSevpa. Operand 274 states. [2018-06-22 01:18:10,974 INFO ]: Finished minimizeSevpa. Reduced states from 274 to 149. [2018-06-22 01:18:10,974 INFO ]: Start removeUnreachable. Operand 149 states. [2018-06-22 01:18:10,974 INFO ]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2018-06-22 01:18:10,974 INFO ]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 23 [2018-06-22 01:18:10,974 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:10,974 INFO ]: Abstraction has 149 states and 191 transitions. [2018-06-22 01:18:10,974 INFO ]: Interpolant automaton has 23 states. [2018-06-22 01:18:10,974 INFO ]: Start isEmpty. Operand 149 states and 191 transitions. [2018-06-22 01:18:10,974 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 01:18:10,974 INFO ]: Found error trace [2018-06-22 01:18:10,975 INFO ]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:10,975 INFO ]: === Iteration 63 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:10,975 INFO ]: Analyzing trace with hash -257836870, now seen corresponding path program 16 times [2018-06-22 01:18:10,975 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:10,975 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:10,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:10,975 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:10,975 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:10,979 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:11,191 INFO ]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:11,191 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:11,192 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:11,197 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:18:11,233 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:18:11,233 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:11,236 INFO ]: Computing forward predicates... [2018-06-22 01:18:11,417 INFO ]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:11,436 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:11,436 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 29 [2018-06-22 01:18:11,436 INFO ]: Interpolant automaton has 29 states [2018-06-22 01:18:11,436 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 01:18:11,436 INFO ]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2018-06-22 01:18:11,436 INFO ]: Start difference. First operand 149 states and 191 transitions. Second operand 29 states. [2018-06-22 01:18:11,987 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:11,987 INFO ]: Finished difference Result 356 states and 429 transitions. [2018-06-22 01:18:11,987 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 01:18:11,987 INFO ]: Start accepts. Automaton has 29 states. Word has length 23 [2018-06-22 01:18:11,987 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:11,988 INFO ]: With dead ends: 356 [2018-06-22 01:18:11,988 INFO ]: Without dead ends: 355 [2018-06-22 01:18:11,988 INFO ]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 01:18:11,989 INFO ]: Start minimizeSevpa. Operand 355 states. [2018-06-22 01:18:11,991 INFO ]: Finished minimizeSevpa. Reduced states from 355 to 160. [2018-06-22 01:18:11,992 INFO ]: Start removeUnreachable. Operand 160 states. [2018-06-22 01:18:11,992 INFO ]: Finished removeUnreachable. Reduced from 160 states to 160 states and 207 transitions. [2018-06-22 01:18:11,992 INFO ]: Start accepts. Automaton has 160 states and 207 transitions. Word has length 23 [2018-06-22 01:18:11,992 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:11,992 INFO ]: Abstraction has 160 states and 207 transitions. [2018-06-22 01:18:11,992 INFO ]: Interpolant automaton has 29 states. [2018-06-22 01:18:11,992 INFO ]: Start isEmpty. Operand 160 states and 207 transitions. [2018-06-22 01:18:11,993 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 01:18:11,993 INFO ]: Found error trace [2018-06-22 01:18:11,993 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:11,993 INFO ]: === Iteration 64 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:11,993 INFO ]: Analyzing trace with hash 1013822338, now seen corresponding path program 15 times [2018-06-22 01:18:11,993 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:11,993 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:11,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:11,993 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:11,993 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:12,001 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:12,095 INFO ]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:12,095 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:12,095 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:12,102 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:18:12,142 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 01:18:12,142 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:12,144 INFO ]: Computing forward predicates... [2018-06-22 01:18:12,309 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:12,328 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:12,328 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-06-22 01:18:12,329 INFO ]: Interpolant automaton has 24 states [2018-06-22 01:18:12,329 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 01:18:12,329 INFO ]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2018-06-22 01:18:12,329 INFO ]: Start difference. First operand 160 states and 207 transitions. Second operand 24 states. [2018-06-22 01:18:12,713 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:12,713 INFO ]: Finished difference Result 304 states and 366 transitions. [2018-06-22 01:18:12,713 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-06-22 01:18:12,713 INFO ]: Start accepts. Automaton has 24 states. Word has length 23 [2018-06-22 01:18:12,714 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:12,714 INFO ]: With dead ends: 304 [2018-06-22 01:18:12,714 INFO ]: Without dead ends: 281 [2018-06-22 01:18:12,714 INFO ]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=594, Invalid=2162, Unknown=0, NotChecked=0, Total=2756 [2018-06-22 01:18:12,715 INFO ]: Start minimizeSevpa. Operand 281 states. [2018-06-22 01:18:12,717 INFO ]: Finished minimizeSevpa. Reduced states from 281 to 163. [2018-06-22 01:18:12,717 INFO ]: Start removeUnreachable. Operand 163 states. [2018-06-22 01:18:12,717 INFO ]: Finished removeUnreachable. Reduced from 163 states to 163 states and 208 transitions. [2018-06-22 01:18:12,717 INFO ]: Start accepts. Automaton has 163 states and 208 transitions. Word has length 23 [2018-06-22 01:18:12,718 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:12,718 INFO ]: Abstraction has 163 states and 208 transitions. [2018-06-22 01:18:12,718 INFO ]: Interpolant automaton has 24 states. [2018-06-22 01:18:12,718 INFO ]: Start isEmpty. Operand 163 states and 208 transitions. [2018-06-22 01:18:12,718 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 01:18:12,718 INFO ]: Found error trace [2018-06-22 01:18:12,718 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:12,718 INFO ]: === Iteration 65 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:12,718 INFO ]: Analyzing trace with hash 179517696, now seen corresponding path program 14 times [2018-06-22 01:18:12,718 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:12,718 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:12,719 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:12,719 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:12,719 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:12,725 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:12,950 INFO ]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:12,950 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:12,950 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:12,956 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:18:12,994 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:18:12,995 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:12,997 INFO ]: Computing forward predicates... [2018-06-22 01:18:13,091 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:13,110 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:13,111 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2018-06-22 01:18:13,111 INFO ]: Interpolant automaton has 22 states [2018-06-22 01:18:13,111 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 01:18:13,111 INFO ]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2018-06-22 01:18:13,111 INFO ]: Start difference. First operand 163 states and 208 transitions. Second operand 22 states. [2018-06-22 01:18:13,570 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:13,570 INFO ]: Finished difference Result 293 states and 361 transitions. [2018-06-22 01:18:13,570 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-06-22 01:18:13,570 INFO ]: Start accepts. Automaton has 22 states. Word has length 23 [2018-06-22 01:18:13,571 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:13,572 INFO ]: With dead ends: 293 [2018-06-22 01:18:13,572 INFO ]: Without dead ends: 285 [2018-06-22 01:18:13,572 INFO ]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=702, Invalid=2268, Unknown=0, NotChecked=0, Total=2970 [2018-06-22 01:18:13,572 INFO ]: Start minimizeSevpa. Operand 285 states. [2018-06-22 01:18:13,575 INFO ]: Finished minimizeSevpa. Reduced states from 285 to 181. [2018-06-22 01:18:13,575 INFO ]: Start removeUnreachable. Operand 181 states. [2018-06-22 01:18:13,576 INFO ]: Finished removeUnreachable. Reduced from 181 states to 181 states and 232 transitions. [2018-06-22 01:18:13,576 INFO ]: Start accepts. Automaton has 181 states and 232 transitions. Word has length 23 [2018-06-22 01:18:13,576 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:13,576 INFO ]: Abstraction has 181 states and 232 transitions. [2018-06-22 01:18:13,576 INFO ]: Interpolant automaton has 22 states. [2018-06-22 01:18:13,576 INFO ]: Start isEmpty. Operand 181 states and 232 transitions. [2018-06-22 01:18:13,577 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-22 01:18:13,577 INFO ]: Found error trace [2018-06-22 01:18:13,577 INFO ]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:13,577 INFO ]: === Iteration 66 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:13,577 INFO ]: Analyzing trace with hash 1512184690, now seen corresponding path program 15 times [2018-06-22 01:18:13,577 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:13,577 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:13,578 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:13,578 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:13,578 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:13,586 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:13,873 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:13,873 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:13,873 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:13,880 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 01:18:13,920 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 01:18:13,920 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:13,922 INFO ]: Computing forward predicates... [2018-06-22 01:18:13,979 INFO ]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:13,999 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:13,999 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2018-06-22 01:18:13,999 INFO ]: Interpolant automaton has 21 states [2018-06-22 01:18:13,999 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 01:18:13,999 INFO ]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2018-06-22 01:18:13,999 INFO ]: Start difference. First operand 181 states and 232 transitions. Second operand 21 states. [2018-06-22 01:18:14,255 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:14,255 INFO ]: Finished difference Result 265 states and 331 transitions. [2018-06-22 01:18:14,255 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 01:18:14,255 INFO ]: Start accepts. Automaton has 21 states. Word has length 23 [2018-06-22 01:18:14,255 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:14,255 INFO ]: With dead ends: 265 [2018-06-22 01:18:14,255 INFO ]: Without dead ends: 265 [2018-06-22 01:18:14,256 INFO ]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2018-06-22 01:18:14,256 INFO ]: Start minimizeSevpa. Operand 265 states. [2018-06-22 01:18:14,258 INFO ]: Finished minimizeSevpa. Reduced states from 265 to 182. [2018-06-22 01:18:14,258 INFO ]: Start removeUnreachable. Operand 182 states. [2018-06-22 01:18:14,258 INFO ]: Finished removeUnreachable. Reduced from 182 states to 182 states and 233 transitions. [2018-06-22 01:18:14,259 INFO ]: Start accepts. Automaton has 182 states and 233 transitions. Word has length 23 [2018-06-22 01:18:14,259 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:14,259 INFO ]: Abstraction has 182 states and 233 transitions. [2018-06-22 01:18:14,259 INFO ]: Interpolant automaton has 21 states. [2018-06-22 01:18:14,259 INFO ]: Start isEmpty. Operand 182 states and 233 transitions. [2018-06-22 01:18:14,259 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:14,259 INFO ]: Found error trace [2018-06-22 01:18:14,259 INFO ]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:14,259 INFO ]: === Iteration 67 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:14,260 INFO ]: Analyzing trace with hash -850171968, now seen corresponding path program 17 times [2018-06-22 01:18:14,260 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:14,260 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:14,260 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:14,260 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:14,260 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:14,269 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:14,504 INFO ]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:14,504 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:14,504 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:14,510 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:18:14,552 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-22 01:18:14,552 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:14,554 INFO ]: Computing forward predicates... [2018-06-22 01:18:14,780 INFO ]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:14,799 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:14,800 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2018-06-22 01:18:14,800 INFO ]: Interpolant automaton has 24 states [2018-06-22 01:18:14,800 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 01:18:14,800 INFO ]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2018-06-22 01:18:14,800 INFO ]: Start difference. First operand 182 states and 233 transitions. Second operand 24 states. [2018-06-22 01:18:15,088 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:15,088 INFO ]: Finished difference Result 423 states and 504 transitions. [2018-06-22 01:18:15,088 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 01:18:15,088 INFO ]: Start accepts. Automaton has 24 states. Word has length 24 [2018-06-22 01:18:15,088 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:15,089 INFO ]: With dead ends: 423 [2018-06-22 01:18:15,089 INFO ]: Without dead ends: 423 [2018-06-22 01:18:15,089 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2018-06-22 01:18:15,090 INFO ]: Start minimizeSevpa. Operand 423 states. [2018-06-22 01:18:15,093 INFO ]: Finished minimizeSevpa. Reduced states from 423 to 173. [2018-06-22 01:18:15,093 INFO ]: Start removeUnreachable. Operand 173 states. [2018-06-22 01:18:15,094 INFO ]: Finished removeUnreachable. Reduced from 173 states to 173 states and 220 transitions. [2018-06-22 01:18:15,094 INFO ]: Start accepts. Automaton has 173 states and 220 transitions. Word has length 24 [2018-06-22 01:18:15,094 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:15,094 INFO ]: Abstraction has 173 states and 220 transitions. [2018-06-22 01:18:15,094 INFO ]: Interpolant automaton has 24 states. [2018-06-22 01:18:15,094 INFO ]: Start isEmpty. Operand 173 states and 220 transitions. [2018-06-22 01:18:15,094 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:15,094 INFO ]: Found error trace [2018-06-22 01:18:15,094 INFO ]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:15,094 INFO ]: === Iteration 68 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:15,094 INFO ]: Analyzing trace with hash 421487240, now seen corresponding path program 16 times [2018-06-22 01:18:15,094 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:15,094 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:15,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:15,095 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:15,095 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:15,103 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:15,301 INFO ]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:15,301 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:15,301 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:15,311 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 01:18:15,349 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 01:18:15,349 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:15,352 INFO ]: Computing forward predicates... [2018-06-22 01:18:15,571 INFO ]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:15,590 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:15,622 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2018-06-22 01:18:15,623 INFO ]: Interpolant automaton has 31 states [2018-06-22 01:18:15,623 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 01:18:15,623 INFO ]: CoverageRelationStatistics Valid=70, Invalid=860, Unknown=0, NotChecked=0, Total=930 [2018-06-22 01:18:15,623 INFO ]: Start difference. First operand 173 states and 220 transitions. Second operand 31 states. [2018-06-22 01:18:16,233 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:16,233 INFO ]: Finished difference Result 407 states and 480 transitions. [2018-06-22 01:18:16,234 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 01:18:16,234 INFO ]: Start accepts. Automaton has 31 states. Word has length 24 [2018-06-22 01:18:16,234 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:16,235 INFO ]: With dead ends: 407 [2018-06-22 01:18:16,235 INFO ]: Without dead ends: 405 [2018-06-22 01:18:16,235 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2018-06-22 01:18:16,235 INFO ]: Start minimizeSevpa. Operand 405 states. [2018-06-22 01:18:16,237 INFO ]: Finished minimizeSevpa. Reduced states from 405 to 182. [2018-06-22 01:18:16,237 INFO ]: Start removeUnreachable. Operand 182 states. [2018-06-22 01:18:16,238 INFO ]: Finished removeUnreachable. Reduced from 182 states to 182 states and 232 transitions. [2018-06-22 01:18:16,238 INFO ]: Start accepts. Automaton has 182 states and 232 transitions. Word has length 24 [2018-06-22 01:18:16,238 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:16,238 INFO ]: Abstraction has 182 states and 232 transitions. [2018-06-22 01:18:16,238 INFO ]: Interpolant automaton has 31 states. [2018-06-22 01:18:16,238 INFO ]: Start isEmpty. Operand 182 states and 232 transitions. [2018-06-22 01:18:16,238 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:16,238 INFO ]: Found error trace [2018-06-22 01:18:16,238 INFO ]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:16,238 INFO ]: === Iteration 69 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:16,238 INFO ]: Analyzing trace with hash 532309760, now seen corresponding path program 18 times [2018-06-22 01:18:16,239 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:16,239 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:16,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:16,239 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:16,239 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:16,245 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:16,359 INFO ]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:16,360 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:16,360 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:16,366 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:18:16,408 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 01:18:16,408 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:16,410 INFO ]: Computing forward predicates... [2018-06-22 01:18:16,507 INFO ]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:16,525 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:16,525 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2018-06-22 01:18:16,526 INFO ]: Interpolant automaton has 25 states [2018-06-22 01:18:16,526 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 01:18:16,526 INFO ]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2018-06-22 01:18:16,526 INFO ]: Start difference. First operand 182 states and 232 transitions. Second operand 25 states. [2018-06-22 01:18:17,021 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:17,021 INFO ]: Finished difference Result 426 states and 504 transitions. [2018-06-22 01:18:17,026 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-06-22 01:18:17,026 INFO ]: Start accepts. Automaton has 25 states. Word has length 24 [2018-06-22 01:18:17,026 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:17,027 INFO ]: With dead ends: 426 [2018-06-22 01:18:17,027 INFO ]: Without dead ends: 417 [2018-06-22 01:18:17,028 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=810, Invalid=2850, Unknown=0, NotChecked=0, Total=3660 [2018-06-22 01:18:17,028 INFO ]: Start minimizeSevpa. Operand 417 states. [2018-06-22 01:18:17,031 INFO ]: Finished minimizeSevpa. Reduced states from 417 to 183. [2018-06-22 01:18:17,031 INFO ]: Start removeUnreachable. Operand 183 states. [2018-06-22 01:18:17,031 INFO ]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2018-06-22 01:18:17,031 INFO ]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 24 [2018-06-22 01:18:17,031 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:17,031 INFO ]: Abstraction has 183 states and 233 transitions. [2018-06-22 01:18:17,031 INFO ]: Interpolant automaton has 25 states. [2018-06-22 01:18:17,031 INFO ]: Start isEmpty. Operand 183 states and 233 transitions. [2018-06-22 01:18:17,032 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:17,032 INFO ]: Found error trace [2018-06-22 01:18:17,032 INFO ]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:17,032 INFO ]: === Iteration 70 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:17,032 INFO ]: Analyzing trace with hash -1792108554, now seen corresponding path program 11 times [2018-06-22 01:18:17,032 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:17,032 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:17,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:17,032 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:17,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:17,039 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:17,256 INFO ]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:17,256 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:17,256 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:17,261 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 01:18:17,304 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 01:18:17,304 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:17,307 INFO ]: Computing forward predicates... [2018-06-22 01:18:17,355 INFO ]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:17,374 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:17,374 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-06-22 01:18:17,374 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:18:17,374 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:18:17,374 INFO ]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:18:17,374 INFO ]: Start difference. First operand 183 states and 233 transitions. Second operand 20 states. [2018-06-22 01:18:17,850 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:17,850 INFO ]: Finished difference Result 331 states and 386 transitions. [2018-06-22 01:18:17,851 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 01:18:17,851 INFO ]: Start accepts. Automaton has 20 states. Word has length 24 [2018-06-22 01:18:17,851 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:17,852 INFO ]: With dead ends: 331 [2018-06-22 01:18:17,852 INFO ]: Without dead ends: 322 [2018-06-22 01:18:17,852 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 01:18:17,853 INFO ]: Start minimizeSevpa. Operand 322 states. [2018-06-22 01:18:17,855 INFO ]: Finished minimizeSevpa. Reduced states from 322 to 177. [2018-06-22 01:18:17,855 INFO ]: Start removeUnreachable. Operand 177 states. [2018-06-22 01:18:17,855 INFO ]: Finished removeUnreachable. Reduced from 177 states to 177 states and 226 transitions. [2018-06-22 01:18:17,855 INFO ]: Start accepts. Automaton has 177 states and 226 transitions. Word has length 24 [2018-06-22 01:18:17,855 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:17,855 INFO ]: Abstraction has 177 states and 226 transitions. [2018-06-22 01:18:17,855 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:18:17,855 INFO ]: Start isEmpty. Operand 177 states and 226 transitions. [2018-06-22 01:18:17,855 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:17,855 INFO ]: Found error trace [2018-06-22 01:18:17,855 INFO ]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:17,855 INFO ]: === Iteration 71 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:17,855 INFO ]: Analyzing trace with hash -1694101432, now seen corresponding path program 12 times [2018-06-22 01:18:17,855 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:17,855 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:17,856 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:17,856 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:17,856 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:17,863 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:18,418 INFO ]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:18,418 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:18,418 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:18,423 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 01:18:18,463 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2018-06-22 01:18:18,463 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:18,466 INFO ]: Computing forward predicates... [2018-06-22 01:18:18,507 INFO ]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:18,527 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:18,527 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-06-22 01:18:18,527 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:18:18,527 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:18:18,527 INFO ]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:18:18,527 INFO ]: Start difference. First operand 177 states and 226 transitions. Second operand 20 states. [2018-06-22 01:18:19,019 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:19,019 INFO ]: Finished difference Result 310 states and 363 transitions. [2018-06-22 01:18:19,019 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 01:18:19,019 INFO ]: Start accepts. Automaton has 20 states. Word has length 24 [2018-06-22 01:18:19,019 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:19,020 INFO ]: With dead ends: 310 [2018-06-22 01:18:19,020 INFO ]: Without dead ends: 301 [2018-06-22 01:18:19,020 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 01:18:19,020 INFO ]: Start minimizeSevpa. Operand 301 states. [2018-06-22 01:18:19,023 INFO ]: Finished minimizeSevpa. Reduced states from 301 to 177. [2018-06-22 01:18:19,023 INFO ]: Start removeUnreachable. Operand 177 states. [2018-06-22 01:18:19,023 INFO ]: Finished removeUnreachable. Reduced from 177 states to 177 states and 225 transitions. [2018-06-22 01:18:19,024 INFO ]: Start accepts. Automaton has 177 states and 225 transitions. Word has length 24 [2018-06-22 01:18:19,024 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:19,024 INFO ]: Abstraction has 177 states and 225 transitions. [2018-06-22 01:18:19,024 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:18:19,024 INFO ]: Start isEmpty. Operand 177 states and 225 transitions. [2018-06-22 01:18:19,024 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:19,024 INFO ]: Found error trace [2018-06-22 01:18:19,024 INFO ]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:19,024 INFO ]: === Iteration 72 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:19,024 INFO ]: Analyzing trace with hash 1344119350, now seen corresponding path program 13 times [2018-06-22 01:18:19,024 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:19,024 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:19,025 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:19,025 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:19,025 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:19,030 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:19,741 INFO ]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:19,741 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:19,741 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:19,746 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:19,785 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:19,788 INFO ]: Computing forward predicates... [2018-06-22 01:18:19,876 INFO ]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:19,895 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:19,895 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-06-22 01:18:19,895 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:18:19,895 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:18:19,896 INFO ]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:18:19,896 INFO ]: Start difference. First operand 177 states and 225 transitions. Second operand 20 states. [2018-06-22 01:18:20,354 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:20,354 INFO ]: Finished difference Result 270 states and 321 transitions. [2018-06-22 01:18:20,355 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 01:18:20,355 INFO ]: Start accepts. Automaton has 20 states. Word has length 24 [2018-06-22 01:18:20,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:20,355 INFO ]: With dead ends: 270 [2018-06-22 01:18:20,355 INFO ]: Without dead ends: 261 [2018-06-22 01:18:20,356 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 01:18:20,356 INFO ]: Start minimizeSevpa. Operand 261 states. [2018-06-22 01:18:20,357 INFO ]: Finished minimizeSevpa. Reduced states from 261 to 177. [2018-06-22 01:18:20,357 INFO ]: Start removeUnreachable. Operand 177 states. [2018-06-22 01:18:20,357 INFO ]: Finished removeUnreachable. Reduced from 177 states to 177 states and 224 transitions. [2018-06-22 01:18:20,357 INFO ]: Start accepts. Automaton has 177 states and 224 transitions. Word has length 24 [2018-06-22 01:18:20,357 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:20,357 INFO ]: Abstraction has 177 states and 224 transitions. [2018-06-22 01:18:20,357 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:18:20,357 INFO ]: Start isEmpty. Operand 177 states and 224 transitions. [2018-06-22 01:18:20,357 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:20,357 INFO ]: Found error trace [2018-06-22 01:18:20,358 INFO ]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:20,358 INFO ]: === Iteration 73 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:20,358 INFO ]: Analyzing trace with hash 1039683080, now seen corresponding path program 14 times [2018-06-22 01:18:20,358 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:20,358 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:20,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:20,358 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 01:18:20,358 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:20,363 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:20,711 INFO ]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:20,711 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 01:18:20,727 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 01:18:20,733 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 01:18:20,772 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 01:18:20,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 01:18:20,775 INFO ]: Computing forward predicates... [2018-06-22 01:18:20,807 INFO ]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 01:18:20,826 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 01:18:20,826 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2018-06-22 01:18:20,826 INFO ]: Interpolant automaton has 20 states [2018-06-22 01:18:20,826 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 01:18:20,826 INFO ]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-06-22 01:18:20,826 INFO ]: Start difference. First operand 177 states and 224 transitions. Second operand 20 states. [2018-06-22 01:18:21,253 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 01:18:21,253 INFO ]: Finished difference Result 239 states and 288 transitions. [2018-06-22 01:18:21,253 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 01:18:21,253 INFO ]: Start accepts. Automaton has 20 states. Word has length 24 [2018-06-22 01:18:21,253 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 01:18:21,254 INFO ]: With dead ends: 239 [2018-06-22 01:18:21,254 INFO ]: Without dead ends: 230 [2018-06-22 01:18:21,254 INFO ]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 01:18:21,254 INFO ]: Start minimizeSevpa. Operand 230 states. [2018-06-22 01:18:21,256 INFO ]: Finished minimizeSevpa. Reduced states from 230 to 177. [2018-06-22 01:18:21,256 INFO ]: Start removeUnreachable. Operand 177 states. [2018-06-22 01:18:21,257 INFO ]: Finished removeUnreachable. Reduced from 177 states to 177 states and 223 transitions. [2018-06-22 01:18:21,257 INFO ]: Start accepts. Automaton has 177 states and 223 transitions. Word has length 24 [2018-06-22 01:18:21,257 INFO ]: Finished accepts. word is rejected. [2018-06-22 01:18:21,257 INFO ]: Abstraction has 177 states and 223 transitions. [2018-06-22 01:18:21,257 INFO ]: Interpolant automaton has 20 states. [2018-06-22 01:18:21,257 INFO ]: Start isEmpty. Operand 177 states and 223 transitions. [2018-06-22 01:18:21,257 INFO ]: Finished isEmpty. Found accepting run of length 25 [2018-06-22 01:18:21,257 INFO ]: Found error trace [2018-06-22 01:18:21,258 INFO ]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 01:18:21,258 INFO ]: === Iteration 74 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 01:18:21,258 INFO ]: Analyzing trace with hash 192093302, now seen corresponding path program 15 times [2018-06-22 01:18:21,258 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 01:18:21,258 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 01:18:21,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:21,258 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 01:18:21,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 01:18:21,265 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 01:18:21,551 WARN ]: Verification canceled [2018-06-22 01:18:21,679 WARN ]: Timeout [2018-06-22 01:18:21,679 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 01:18:21 BoogieIcfgContainer [2018-06-22 01:18:21,679 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 01:18:21,681 INFO ]: Toolchain (without parser) took 54769.09 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 259.0 MB in the beginning and 705.6 MB in the end (delta: -446.6 MB). Peak memory consumption was 198.3 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:21,681 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 01:18:21,681 INFO ]: ChcToBoogie took 61.78 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:21,682 INFO ]: Boogie Preprocessor took 40.82 ms. Allocated memory is still 305.7 MB. Free memory was 257.1 MB in the beginning and 255.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:21,682 INFO ]: RCFGBuilder took 420.89 ms. Allocated memory is still 305.7 MB. Free memory was 255.1 MB in the beginning and 242.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:21,682 INFO ]: TraceAbstraction took 54237.09 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 241.1 MB in the beginning and 705.6 MB in the end (delta: -464.6 MB). Peak memory consumption was 180.3 MB. Max. memory is 3.6 GB. [2018-06-22 01:18:21,686 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.78 ms. Allocated memory is still 305.7 MB. Free memory was 259.0 MB in the beginning and 257.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.82 ms. Allocated memory is still 305.7 MB. Free memory was 257.1 MB in the beginning and 255.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 420.89 ms. Allocated memory is still 305.7 MB. Free memory was 255.1 MB in the beginning and 242.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 54237.09 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 241.1 MB in the beginning and 705.6 MB in the end (delta: -464.6 MB). Peak memory consumption was 180.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5, while InterpolatingTraceCheckCraig was constructing Craig interpolants, while PredicateComparison was comparing new predicate (quantifier-free) to 5 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. TIMEOUT Result, 54.1s OverallTime, 74 OverallIterations, 7 TraceHistogramMax, 21.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2166 SDtfs, 6444 SDslu, 19729 SDs, 0 SdLazy, 16244 SolverSat, 1343 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2926 GetRequests, 985 SyntacticMatches, 106 SemanticMatches, 1835 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9174 ImplicationChecksByTransitivity, 34.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=69, 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: 0.2s AutomataMinimizationTime, 73 MinimizatonAttempts, 4620 StatesRemovedByMinimization, 73 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 27.1s InterpolantComputationTime, 2595 NumberOfCodeBlocks, 2595 NumberOfCodeBlocksAsserted, 218 NumberOfCheckSat, 2456 ConstructedInterpolants, 0 QuantifiedInterpolants, 181333 SizeOfPredicates, 592 NumberOfNonLiveVariables, 20088 ConjunctsInSsa, 3158 ConjunctsInUnsatCore, 139 InterpolantComputations, 10 PerfectInterpolantSequences, 678/2372 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/while_after_while_if_merged_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_01-18-21-694.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/while_after_while_if_merged_safe.c-1.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_01-18-21-694.csv Completed graceful shutdown