java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.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/HOLA/31.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 20:42:13,429 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 20:42:13,431 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 20:42:13,444 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 20:42:13,444 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 20:42:13,445 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 20:42:13,448 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 20:42:13,450 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 20:42:13,451 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 20:42:13,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 20:42:13,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 20:42:13,454 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 20:42:13,455 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 20:42:13,458 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 20:42:13,459 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 20:42:13,459 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 20:42:13,461 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 20:42:13,470 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 20:42:13,471 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 20:42:13,472 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 20:42:13,473 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 20:42:13,478 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 20:42:13,478 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 20:42:13,479 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 20:42:13,479 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 20:42:13,483 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 20:42:13,484 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 20:42:13,485 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 20:42:13,485 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 20:42:13,486 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 20:42:13,486 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 20:42:13,490 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 20:42:13,490 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 20:42:13,491 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 20:42:13,491 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 20:42:13,492 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 20:42:13,510 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 20:42:13,512 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 20:42:13,512 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 20:42:13,512 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 20:42:13,513 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 20:42:13,513 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 20:42:13,514 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 20:42:13,514 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 20:42:13,514 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 20:42:13,514 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 20:42:13,514 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 20:42:13,515 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 20:42:13,515 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 20:42:13,515 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 20:42:13,515 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 20:42:13,515 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 20:42:13,515 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 20:42:13,516 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 20:42:13,517 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 20:42:13,517 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 20:42:13,517 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 20:42:13,518 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 20:42:13,519 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 20:42:13,565 INFO ]: Repository-Root is: /tmp [2018-06-24 20:42:13,582 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 20:42:13,586 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 20:42:13,588 INFO ]: Initializing SmtParser... [2018-06-24 20:42:13,588 INFO ]: SmtParser initialized [2018-06-24 20:42:13,589 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/HOLA/31.c.smt2 [2018-06-24 20:42:13,590 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 [2018-06-24 20:42:13,666 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/HOLA/31.c.smt2 unknown [2018-06-24 20:42:14,415 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/HOLA/31.c.smt2 [2018-06-24 20:42:14,420 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 20:42:14,426 INFO ]: Walking toolchain with 5 elements. [2018-06-24 20:42:14,427 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 20:42:14,427 INFO ]: Initializing ChcToBoogie... [2018-06-24 20:42:14,427 INFO ]: ChcToBoogie initialized [2018-06-24 20:42:14,430 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,498 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14 Unit [2018-06-24 20:42:14,498 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 20:42:14,501 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 20:42:14,501 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 20:42:14,501 INFO ]: Boogie Preprocessor initialized [2018-06-24 20:42:14,522 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,522 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,537 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,537 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,558 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,572 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,575 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (1/1) ... [2018-06-24 20:42:14,580 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 20:42:14,581 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 20:42:14,581 INFO ]: Initializing RCFGBuilder... [2018-06-24 20:42:14,581 INFO ]: RCFGBuilder initialized [2018-06-24 20:42:14,581 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (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) [2018-06-24 20:42:14,616 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 20:42:14,616 INFO ]: Found specification of procedure gotoProc [2018-06-24 20:42:14,616 INFO ]: Found implementation of procedure gotoProc [2018-06-24 20:42:14,616 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 20:42:14,616 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 20:42:14,616 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 [2018-06-24 20:42:15,676 INFO ]: Using library mode [2018-06-24 20:42:15,676 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:42:15 BoogieIcfgContainer [2018-06-24 20:42:15,676 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 20:42:15,677 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 20:42:15,677 INFO ]: Initializing BlockEncodingV2... [2018-06-24 20:42:15,677 INFO ]: BlockEncodingV2 initialized [2018-06-24 20:42:15,680 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:42:15" (1/1) ... [2018-06-24 20:42:15,706 INFO ]: Initial Icfg 51 locations, 56 edges [2018-06-24 20:42:15,708 INFO ]: Using Remove infeasible edges [2018-06-24 20:42:15,709 INFO ]: Using Maximize final states [2018-06-24 20:42:15,709 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 20:42:15,709 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 20:42:15,711 INFO ]: Using Remove sink states [2018-06-24 20:42:15,716 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 20:42:15,716 INFO ]: Using Use SBE [2018-06-24 20:42:15,731 INFO ]: SBE split 0 edges [2018-06-24 20:42:15,736 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-24 20:42:15,737 INFO ]: 0 new accepting states [2018-06-24 20:42:17,359 INFO ]: Removed 120 edges and 42 locations by large block encoding [2018-06-24 20:42:17,361 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 20:42:17,363 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 20:42:17,363 INFO ]: 0 new accepting states [2018-06-24 20:42:17,363 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 20:42:17,363 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 20:42:17,363 INFO ]: Encoded RCFG 7 locations, 13 edges [2018-06-24 20:42:17,364 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 08:42:17 BasicIcfg [2018-06-24 20:42:17,364 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 20:42:17,366 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 20:42:17,367 INFO ]: Initializing TraceAbstraction... [2018-06-24 20:42:17,369 INFO ]: TraceAbstraction initialized [2018-06-24 20:42:17,370 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 08:42:14" (1/4) ... [2018-06-24 20:42:17,370 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192d649c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 08:42:17, skipping insertion in model container [2018-06-24 20:42:17,370 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 08:42:14" (2/4) ... [2018-06-24 20:42:17,371 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192d649c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 08:42:17, skipping insertion in model container [2018-06-24 20:42:17,371 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 08:42:15" (3/4) ... [2018-06-24 20:42:17,371 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192d649c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 08:42:17, skipping insertion in model container [2018-06-24 20:42:17,371 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 08:42:17" (4/4) ... [2018-06-24 20:42:17,373 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 20:42:17,382 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 20:42:17,390 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 20:42:17,432 INFO ]: Using default assertion order modulation [2018-06-24 20:42:17,432 INFO ]: Interprodecural is true [2018-06-24 20:42:17,432 INFO ]: Hoare is false [2018-06-24 20:42:17,432 INFO ]: Compute interpolants for FPandBP [2018-06-24 20:42:17,433 INFO ]: Backedges is TWOTRACK [2018-06-24 20:42:17,433 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 20:42:17,433 INFO ]: Difference is false [2018-06-24 20:42:17,433 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 20:42:17,433 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 20:42:17,444 INFO ]: Start isEmpty. Operand 7 states. [2018-06-24 20:42:17,454 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 20:42:17,454 INFO ]: Found error trace [2018-06-24 20:42:17,455 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 20:42:17,455 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:17,460 INFO ]: Analyzing trace with hash 65372792, now seen corresponding path program 1 times [2018-06-24 20:42:17,461 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:17,462 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:17,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:17,508 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:17,508 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:17,618 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:17,762 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:17,764 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:42:17,764 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 20:42:17,765 INFO ]: Interpolant automaton has 3 states [2018-06-24 20:42:17,775 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 20:42:17,775 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:42:17,777 INFO ]: Start difference. First operand 7 states. Second operand 3 states. [2018-06-24 20:42:17,944 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:17,945 INFO ]: Finished difference Result 9 states and 19 transitions. [2018-06-24 20:42:17,945 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 20:42:17,946 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 20:42:17,947 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:17,956 INFO ]: With dead ends: 9 [2018-06-24 20:42:17,956 INFO ]: Without dead ends: 9 [2018-06-24 20:42:17,958 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:42:17,972 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-24 20:42:17,994 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-24 20:42:17,995 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 20:42:17,996 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-06-24 20:42:18,001 INFO ]: Start accepts. Automaton has 8 states and 16 transitions. Word has length 5 [2018-06-24 20:42:18,001 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:18,001 INFO ]: Abstraction has 8 states and 16 transitions. [2018-06-24 20:42:18,001 INFO ]: Interpolant automaton has 3 states. [2018-06-24 20:42:18,001 INFO ]: Start isEmpty. Operand 8 states and 16 transitions. [2018-06-24 20:42:18,001 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 20:42:18,001 INFO ]: Found error trace [2018-06-24 20:42:18,001 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 20:42:18,002 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:18,002 INFO ]: Analyzing trace with hash 65402583, now seen corresponding path program 1 times [2018-06-24 20:42:18,002 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:18,002 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:18,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:18,003 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:18,003 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:18,079 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:18,236 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:18,236 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:42:18,236 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 20:42:18,238 INFO ]: Interpolant automaton has 3 states [2018-06-24 20:42:18,238 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 20:42:18,238 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:42:18,238 INFO ]: Start difference. First operand 8 states and 16 transitions. Second operand 3 states. [2018-06-24 20:42:18,487 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:18,487 INFO ]: Finished difference Result 10 states and 22 transitions. [2018-06-24 20:42:18,488 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 20:42:18,488 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 20:42:18,488 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:18,489 INFO ]: With dead ends: 10 [2018-06-24 20:42:18,489 INFO ]: Without dead ends: 10 [2018-06-24 20:42:18,490 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 20:42:18,490 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-24 20:42:18,491 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 8. [2018-06-24 20:42:18,491 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 20:42:18,491 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-06-24 20:42:18,491 INFO ]: Start accepts. Automaton has 8 states and 16 transitions. Word has length 5 [2018-06-24 20:42:18,491 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:18,491 INFO ]: Abstraction has 8 states and 16 transitions. [2018-06-24 20:42:18,491 INFO ]: Interpolant automaton has 3 states. [2018-06-24 20:42:18,492 INFO ]: Start isEmpty. Operand 8 states and 16 transitions. [2018-06-24 20:42:18,493 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 20:42:18,493 INFO ]: Found error trace [2018-06-24 20:42:18,493 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 20:42:18,493 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:18,493 INFO ]: Analyzing trace with hash 2026514322, now seen corresponding path program 1 times [2018-06-24 20:42:18,493 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:18,493 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:18,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:18,494 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:18,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:18,532 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:18,634 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:18,634 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 20:42:18,634 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 [2018-06-24 20:42:18,643 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:18,832 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:18,847 INFO ]: Computing forward predicates... [2018-06-24 20:42:18,993 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:19,026 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 20:42:19,026 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-24 20:42:19,027 INFO ]: Interpolant automaton has 6 states [2018-06-24 20:42:19,027 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-24 20:42:19,027 INFO ]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-06-24 20:42:19,027 INFO ]: Start difference. First operand 8 states and 16 transitions. Second operand 6 states. [2018-06-24 20:42:19,386 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:19,386 INFO ]: Finished difference Result 16 states and 38 transitions. [2018-06-24 20:42:19,386 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 20:42:19,386 INFO ]: Start accepts. Automaton has 6 states. Word has length 6 [2018-06-24 20:42:19,386 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:19,387 INFO ]: With dead ends: 16 [2018-06-24 20:42:19,387 INFO ]: Without dead ends: 16 [2018-06-24 20:42:19,387 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-24 20:42:19,387 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 20:42:19,389 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 11. [2018-06-24 20:42:19,390 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-24 20:42:19,390 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 23 transitions. [2018-06-24 20:42:19,390 INFO ]: Start accepts. Automaton has 11 states and 23 transitions. Word has length 6 [2018-06-24 20:42:19,390 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:19,390 INFO ]: Abstraction has 11 states and 23 transitions. [2018-06-24 20:42:19,390 INFO ]: Interpolant automaton has 6 states. [2018-06-24 20:42:19,390 INFO ]: Start isEmpty. Operand 11 states and 23 transitions. [2018-06-24 20:42:19,390 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 20:42:19,391 INFO ]: Found error trace [2018-06-24 20:42:19,391 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:19,391 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:19,391 INFO ]: Analyzing trace with hash -1614226178, now seen corresponding path program 1 times [2018-06-24 20:42:19,391 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:19,391 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:19,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:19,391 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:19,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:19,431 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:19,589 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:19,589 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:42:19,589 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 20:42:19,589 INFO ]: Interpolant automaton has 4 states [2018-06-24 20:42:19,589 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 20:42:19,589 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 20:42:19,589 INFO ]: Start difference. First operand 11 states and 23 transitions. Second operand 4 states. [2018-06-24 20:42:19,642 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:19,642 INFO ]: Finished difference Result 13 states and 27 transitions. [2018-06-24 20:42:19,643 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 20:42:19,643 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-24 20:42:19,643 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:19,644 INFO ]: With dead ends: 13 [2018-06-24 20:42:19,644 INFO ]: Without dead ends: 12 [2018-06-24 20:42:19,644 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-24 20:42:19,644 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-24 20:42:19,645 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-24 20:42:19,645 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-24 20:42:19,646 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 25 transitions. [2018-06-24 20:42:19,646 INFO ]: Start accepts. Automaton has 12 states and 25 transitions. Word has length 7 [2018-06-24 20:42:19,646 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:19,646 INFO ]: Abstraction has 12 states and 25 transitions. [2018-06-24 20:42:19,646 INFO ]: Interpolant automaton has 4 states. [2018-06-24 20:42:19,646 INFO ]: Start isEmpty. Operand 12 states and 25 transitions. [2018-06-24 20:42:19,646 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 20:42:19,646 INFO ]: Found error trace [2018-06-24 20:42:19,646 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:19,647 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:19,647 INFO ]: Analyzing trace with hash -1574395611, now seen corresponding path program 1 times [2018-06-24 20:42:19,647 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:19,647 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:19,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:19,647 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:19,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:19,685 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:19,784 INFO ]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:19,784 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 20:42:19,784 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 [2018-06-24 20:42:19,790 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:19,938 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:19,944 INFO ]: Computing forward predicates... [2018-06-24 20:42:20,011 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 20:42:20,037 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 20:42:20,037 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-06-24 20:42:20,037 INFO ]: Interpolant automaton has 7 states [2018-06-24 20:42:20,037 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 20:42:20,037 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-24 20:42:20,037 INFO ]: Start difference. First operand 12 states and 25 transitions. Second operand 7 states. [2018-06-24 20:42:20,227 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:20,227 INFO ]: Finished difference Result 27 states and 63 transitions. [2018-06-24 20:42:20,227 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 20:42:20,227 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-24 20:42:20,227 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:20,229 INFO ]: With dead ends: 27 [2018-06-24 20:42:20,229 INFO ]: Without dead ends: 27 [2018-06-24 20:42:20,230 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2018-06-24 20:42:20,230 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-24 20:42:20,233 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 15. [2018-06-24 20:42:20,233 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 20:42:20,234 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 33 transitions. [2018-06-24 20:42:20,234 INFO ]: Start accepts. Automaton has 15 states and 33 transitions. Word has length 7 [2018-06-24 20:42:20,234 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:20,234 INFO ]: Abstraction has 15 states and 33 transitions. [2018-06-24 20:42:20,234 INFO ]: Interpolant automaton has 7 states. [2018-06-24 20:42:20,234 INFO ]: Start isEmpty. Operand 15 states and 33 transitions. [2018-06-24 20:42:20,234 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 20:42:20,234 INFO ]: Found error trace [2018-06-24 20:42:20,234 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:20,234 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:20,234 INFO ]: Analyzing trace with hash -1585597027, now seen corresponding path program 1 times [2018-06-24 20:42:20,235 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:20,235 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:20,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,235 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:20,235 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,263 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:20,344 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:20,344 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:42:20,344 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 20:42:20,344 INFO ]: Interpolant automaton has 4 states [2018-06-24 20:42:20,344 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 20:42:20,344 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 20:42:20,345 INFO ]: Start difference. First operand 15 states and 33 transitions. Second operand 4 states. [2018-06-24 20:42:20,415 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:20,415 INFO ]: Finished difference Result 25 states and 56 transitions. [2018-06-24 20:42:20,415 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 20:42:20,415 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-24 20:42:20,415 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:20,416 INFO ]: With dead ends: 25 [2018-06-24 20:42:20,416 INFO ]: Without dead ends: 25 [2018-06-24 20:42:20,416 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 [2018-06-24 20:42:20,416 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-24 20:42:20,419 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 20. [2018-06-24 20:42:20,420 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-24 20:42:20,420 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 45 transitions. [2018-06-24 20:42:20,420 INFO ]: Start accepts. Automaton has 20 states and 45 transitions. Word has length 7 [2018-06-24 20:42:20,420 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:20,420 INFO ]: Abstraction has 20 states and 45 transitions. [2018-06-24 20:42:20,420 INFO ]: Interpolant automaton has 4 states. [2018-06-24 20:42:20,420 INFO ]: Start isEmpty. Operand 20 states and 45 transitions. [2018-06-24 20:42:20,421 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 20:42:20,421 INFO ]: Found error trace [2018-06-24 20:42:20,421 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:20,421 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:20,421 INFO ]: Analyzing trace with hash -1585507654, now seen corresponding path program 1 times [2018-06-24 20:42:20,421 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:20,421 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:20,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,422 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:20,422 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,476 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:20,631 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:20,631 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 20:42:20,631 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 20:42:20,631 INFO ]: Interpolant automaton has 4 states [2018-06-24 20:42:20,632 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 20:42:20,632 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 20:42:20,632 INFO ]: Start difference. First operand 20 states and 45 transitions. Second operand 4 states. [2018-06-24 20:42:20,713 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:20,713 INFO ]: Finished difference Result 28 states and 60 transitions. [2018-06-24 20:42:20,713 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 20:42:20,713 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-24 20:42:20,713 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:20,714 INFO ]: With dead ends: 28 [2018-06-24 20:42:20,714 INFO ]: Without dead ends: 23 [2018-06-24 20:42:20,714 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-24 20:42:20,714 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-24 20:42:20,716 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 18. [2018-06-24 20:42:20,717 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-24 20:42:20,717 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2018-06-24 20:42:20,717 INFO ]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 7 [2018-06-24 20:42:20,717 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:20,717 INFO ]: Abstraction has 18 states and 31 transitions. [2018-06-24 20:42:20,717 INFO ]: Interpolant automaton has 4 states. [2018-06-24 20:42:20,717 INFO ]: Start isEmpty. Operand 18 states and 31 transitions. [2018-06-24 20:42:20,718 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-24 20:42:20,718 INFO ]: Found error trace [2018-06-24 20:42:20,718 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:20,718 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:20,718 INFO ]: Analyzing trace with hash 1847108504, now seen corresponding path program 1 times [2018-06-24 20:42:20,718 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:20,718 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:20,718 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,718 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:20,718 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:20,753 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:21,032 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:21,032 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 20:42:21,032 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 [2018-06-24 20:42:21,039 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:21,223 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:21,229 INFO ]: Computing forward predicates... [2018-06-24 20:42:21,292 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 20:42:21,327 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 20:42:21,327 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2018-06-24 20:42:21,327 INFO ]: Interpolant automaton has 7 states [2018-06-24 20:42:21,327 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 20:42:21,327 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-24 20:42:21,327 INFO ]: Start difference. First operand 18 states and 31 transitions. Second operand 7 states. [2018-06-24 20:42:21,692 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:21,692 INFO ]: Finished difference Result 37 states and 59 transitions. [2018-06-24 20:42:21,695 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-24 20:42:21,695 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-24 20:42:21,695 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:21,696 INFO ]: With dead ends: 37 [2018-06-24 20:42:21,696 INFO ]: Without dead ends: 37 [2018-06-24 20:42:21,696 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2018-06-24 20:42:21,696 INFO ]: Start minimizeSevpa. Operand 37 states. [2018-06-24 20:42:21,699 INFO ]: Finished minimizeSevpa. Reduced states from 37 to 28. [2018-06-24 20:42:21,699 INFO ]: Start removeUnreachable. Operand 28 states. [2018-06-24 20:42:21,700 INFO ]: Finished removeUnreachable. Reduced from 28 states to 28 states and 45 transitions. [2018-06-24 20:42:21,700 INFO ]: Start accepts. Automaton has 28 states and 45 transitions. Word has length 8 [2018-06-24 20:42:21,700 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:21,700 INFO ]: Abstraction has 28 states and 45 transitions. [2018-06-24 20:42:21,700 INFO ]: Interpolant automaton has 7 states. [2018-06-24 20:42:21,700 INFO ]: Start isEmpty. Operand 28 states and 45 transitions. [2018-06-24 20:42:21,700 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 20:42:21,700 INFO ]: Found error trace [2018-06-24 20:42:21,700 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-06-24 20:42:21,700 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 20:42:21,700 INFO ]: Analyzing trace with hash 542186994, now seen corresponding path program 1 times [2018-06-24 20:42:21,700 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 20:42:21,700 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 20:42:21,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:21,701 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:21,701 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 20:42:21,743 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:22,087 INFO ]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 20:42:22,087 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 20:42:22,087 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 [2018-06-24 20:42:22,093 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 20:42:22,394 INFO ]: Conjunction of SSA is unsat [2018-06-24 20:42:22,402 INFO ]: Computing forward predicates... [2018-06-24 20:42:22,494 INFO ]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 20:42:22,515 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 20:42:22,515 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2018-06-24 20:42:22,515 INFO ]: Interpolant automaton has 12 states [2018-06-24 20:42:22,516 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-24 20:42:22,516 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-24 20:42:22,516 INFO ]: Start difference. First operand 28 states and 45 transitions. Second operand 12 states. [2018-06-24 20:42:23,146 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 20:42:23,146 INFO ]: Finished difference Result 34 states and 51 transitions. [2018-06-24 20:42:23,146 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-24 20:42:23,146 INFO ]: Start accepts. Automaton has 12 states. Word has length 12 [2018-06-24 20:42:23,146 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 20:42:23,146 INFO ]: With dead ends: 34 [2018-06-24 20:42:23,146 INFO ]: Without dead ends: 0 [2018-06-24 20:42:23,147 INFO ]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2018-06-24 20:42:23,147 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 20:42:23,147 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 20:42:23,147 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 20:42:23,147 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 20:42:23,147 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-06-24 20:42:23,147 INFO ]: Finished accepts. word is rejected. [2018-06-24 20:42:23,147 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 20:42:23,147 INFO ]: Interpolant automaton has 12 states. [2018-06-24 20:42:23,147 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 20:42:23,147 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 20:42:23,149 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 20:42:23,151 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 08:42:23 BasicIcfg [2018-06-24 20:42:23,151 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 20:42:23,152 INFO ]: Toolchain (without parser) took 8730.91 ms. Allocated memory was 309.3 MB in the beginning and 453.5 MB in the end (delta: 144.2 MB). Free memory was 227.8 MB in the beginning and 324.0 MB in the end (delta: -96.2 MB). Peak memory consumption was 47.9 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,153 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 20:42:23,153 INFO ]: ChcToBoogie took 74.19 ms. Allocated memory is still 309.3 MB. Free memory was 225.8 MB in the beginning and 223.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,153 INFO ]: Boogie Preprocessor took 79.08 ms. Allocated memory is still 309.3 MB. Free memory was 223.8 MB in the beginning and 221.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,154 INFO ]: RCFGBuilder took 1095.60 ms. Allocated memory was 309.3 MB in the beginning and 329.8 MB in the end (delta: 20.4 MB). Free memory was 221.8 MB in the beginning and 270.4 MB in the end (delta: -48.6 MB). Peak memory consumption was 39.2 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,154 INFO ]: BlockEncodingV2 took 1687.15 ms. Allocated memory was 329.8 MB in the beginning and 364.9 MB in the end (delta: 35.1 MB). Free memory was 270.4 MB in the beginning and 241.1 MB in the end (delta: 29.4 MB). Peak memory consumption was 94.7 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,154 INFO ]: TraceAbstraction took 5784.29 ms. Allocated memory was 364.9 MB in the beginning and 453.5 MB in the end (delta: 88.6 MB). Free memory was 241.1 MB in the beginning and 324.0 MB in the end (delta: -83.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 3.6 GB. [2018-06-24 20:42:23,157 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 51 locations, 56 edges - StatisticsResult: Encoded RCFG 7 locations, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.19 ms. Allocated memory is still 309.3 MB. Free memory was 225.8 MB in the beginning and 223.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 79.08 ms. Allocated memory is still 309.3 MB. Free memory was 223.8 MB in the beginning and 221.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 1095.60 ms. Allocated memory was 309.3 MB in the beginning and 329.8 MB in the end (delta: 20.4 MB). Free memory was 221.8 MB in the beginning and 270.4 MB in the end (delta: -48.6 MB). Peak memory consumption was 39.2 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 1687.15 ms. Allocated memory was 329.8 MB in the beginning and 364.9 MB in the end (delta: 35.1 MB). Free memory was 270.4 MB in the beginning and 241.1 MB in the end (delta: 29.4 MB). Peak memory consumption was 94.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5784.29 ms. Allocated memory was 364.9 MB in the beginning and 453.5 MB in the end (delta: 88.6 MB). Free memory was 241.1 MB in the beginning and 324.0 MB in the end (delta: -83.0 MB). Peak memory consumption was 5.6 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 7 locations, 1 error locations. SAFE Result, 5.7s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 2.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 92 SDtfs, 53 SDslu, 128 SDs, 0 SdLazy, 381 SolverSat, 173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 97 NumberOfCodeBlocks, 97 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 84 ConstructedInterpolants, 0 QuantifiedInterpolants, 1683 SizeOfPredicates, 155 NumberOfNonLiveVariables, 5933 ConjunctsInSsa, 170 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 20/41 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/31.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_20-42-23-166.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/31.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_20-42-23-166.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/31.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_20-42-23-166.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/31.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_20-42-23-166.csv Received shutdown request...