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/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:50:08,632 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:50:08,634 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:50:08,648 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:50:08,648 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:50:08,649 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:50:08,650 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:50:08,652 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:50:08,653 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:50:08,655 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:50:08,656 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:50:08,656 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:50:08,657 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:50:08,657 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:50:08,660 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:50:08,661 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:50:08,661 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:50:08,671 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:50:08,673 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:50:08,674 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:50:08,675 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:50:08,675 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:50:08,680 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:50:08,680 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:50:08,680 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:50:08,681 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:50:08,685 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:50:08,685 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:50:08,686 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:50:08,687 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:50:08,687 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:50:08,688 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:50:08,691 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:50:08,691 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:50:08,692 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:50:08,693 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:50:08,693 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:50:08,712 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:50:08,713 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:50:08,714 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:50:08,714 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:50:08,715 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:50:08,715 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:50:08,715 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:50:08,715 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:50:08,716 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:50:08,716 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:50:08,716 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:50:08,716 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:50:08,716 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:50:08,717 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:50:08,718 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:50:08,718 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:50:08,718 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:50:08,718 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:50:08,718 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:50:08,719 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:50:08,719 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:50:08,720 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:50:08,722 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:50:08,767 INFO ]: Repository-Root is: /tmp [2018-06-26 21:50:08,781 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:50:08,784 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:50:08,785 INFO ]: Initializing SmtParser... [2018-06-26 21:50:08,785 INFO ]: SmtParser initialized [2018-06-26 21:50:08,785 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-26 21:50:08,786 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 [2018-06-26 21:50:08,873 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 unknown [2018-06-26 21:50:09,243 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/sendmail-close-angle.c.smt2 [2018-06-26 21:50:09,248 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:50:09,254 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:50:09,254 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:50:09,254 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:50:09,254 INFO ]: ChcToBoogie initialized [2018-06-26 21:50:09,258 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,319 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09 Unit [2018-06-26 21:50:09,319 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:50:09,320 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:50:09,320 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:50:09,320 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:50:09,342 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,343 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,351 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,351 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,358 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,359 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,361 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,364 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:50:09,365 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:50:09,365 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:50:09,365 INFO ]: RCFGBuilder initialized [2018-06-26 21:50:09,366 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (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) [2018-06-26 21:50:09,402 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:50:09,402 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:50:09,402 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:50:09,403 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:50:09,403 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:50:09,403 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 [2018-06-26 21:50:09,677 INFO ]: Using library mode [2018-06-26 21:50:09,678 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:50:09 BoogieIcfgContainer [2018-06-26 21:50:09,678 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:50:09,678 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:50:09,678 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:50:09,679 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:50:09,680 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:50:09" (1/1) ... [2018-06-26 21:50:09,695 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:50:09,696 INFO ]: Using Remove infeasible edges [2018-06-26 21:50:09,697 INFO ]: Using Maximize final states [2018-06-26 21:50:09,697 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:50:09,697 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:50:09,699 INFO ]: Using Remove sink states [2018-06-26 21:50:09,699 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:50:09,699 INFO ]: Using Use SBE [2018-06-26 21:50:09,705 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:50:09,756 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-26 21:50:09,778 WARN ]: aborting because of expected exponential blowup for input size 62 [2018-06-26 21:50:09,778 INFO ]: SBE split 1 edges [2018-06-26 21:50:09,783 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:50:09,785 INFO ]: 0 new accepting states [2018-06-26 21:50:09,937 INFO ]: Removed 11 edges and 2 locations by large block encoding [2018-06-26 21:50:09,939 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:50:09,940 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:50:09,940 INFO ]: 0 new accepting states [2018-06-26 21:50:09,941 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:50:09,941 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:50:09,941 INFO ]: Encoded RCFG 6 locations, 13 edges [2018-06-26 21:50:09,941 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:50:09 BasicIcfg [2018-06-26 21:50:09,941 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:50:09,943 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:50:09,943 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:50:09,946 INFO ]: TraceAbstraction initialized [2018-06-26 21:50:09,946 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:50:09" (1/4) ... [2018-06-26 21:50:09,948 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569465d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:50:09, skipping insertion in model container [2018-06-26 21:50:09,949 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:50:09" (2/4) ... [2018-06-26 21:50:09,949 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569465d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:50:09, skipping insertion in model container [2018-06-26 21:50:09,949 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:50:09" (3/4) ... [2018-06-26 21:50:09,949 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569465d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:50:09, skipping insertion in model container [2018-06-26 21:50:09,949 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:50:09" (4/4) ... [2018-06-26 21:50:09,951 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:50:09,963 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:50:09,972 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:50:10,019 INFO ]: Using default assertion order modulation [2018-06-26 21:50:10,020 INFO ]: Interprodecural is true [2018-06-26 21:50:10,020 INFO ]: Hoare is false [2018-06-26 21:50:10,020 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:50:10,020 INFO ]: Backedges is TWOTRACK [2018-06-26 21:50:10,020 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:50:10,020 INFO ]: Difference is false [2018-06-26 21:50:10,020 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:50:10,020 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:50:10,033 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:50:10,048 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:50:10,048 INFO ]: Found error trace [2018-06-26 21:50:10,049 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:50:10,049 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:10,053 INFO ]: Analyzing trace with hash 35655305, now seen corresponding path program 1 times [2018-06-26 21:50:10,054 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:10,054 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:10,086 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,086 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:10,086 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,122 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:10,209 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:10,210 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:50:10,210 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:50:10,212 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:50:10,222 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:50:10,222 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:50:10,225 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:50:10,339 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:10,339 INFO ]: Finished difference Result 7 states and 14 transitions. [2018-06-26 21:50:10,339 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:50:10,340 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:50:10,341 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:10,352 INFO ]: With dead ends: 7 [2018-06-26 21:50:10,352 INFO ]: Without dead ends: 7 [2018-06-26 21:50:10,354 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 [2018-06-26 21:50:10,370 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:50:10,386 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:50:10,387 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:50:10,387 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2018-06-26 21:50:10,388 INFO ]: Start accepts. Automaton has 7 states and 14 transitions. Word has length 5 [2018-06-26 21:50:10,389 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:10,389 INFO ]: Abstraction has 7 states and 14 transitions. [2018-06-26 21:50:10,389 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:50:10,389 INFO ]: Start isEmpty. Operand 7 states and 14 transitions. [2018-06-26 21:50:10,390 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:50:10,390 INFO ]: Found error trace [2018-06-26 21:50:10,390 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:50:10,390 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:10,390 INFO ]: Analyzing trace with hash 35744678, now seen corresponding path program 1 times [2018-06-26 21:50:10,390 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:10,390 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:10,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,391 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:10,391 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,396 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:10,454 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:10,454 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:50:10,454 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:50:10,456 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:50:10,456 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:50:10,456 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:50:10,456 INFO ]: Start difference. First operand 7 states and 14 transitions. Second operand 3 states. [2018-06-26 21:50:10,609 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:10,609 INFO ]: Finished difference Result 8 states and 15 transitions. [2018-06-26 21:50:10,610 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:50:10,610 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:50:10,610 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:10,610 INFO ]: With dead ends: 8 [2018-06-26 21:50:10,610 INFO ]: Without dead ends: 8 [2018-06-26 21:50:10,611 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 [2018-06-26 21:50:10,611 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 21:50:10,612 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-26 21:50:10,612 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:50:10,613 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2018-06-26 21:50:10,613 INFO ]: Start accepts. Automaton has 7 states and 14 transitions. Word has length 5 [2018-06-26 21:50:10,613 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:10,613 INFO ]: Abstraction has 7 states and 14 transitions. [2018-06-26 21:50:10,613 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:50:10,613 INFO ]: Start isEmpty. Operand 7 states and 14 transitions. [2018-06-26 21:50:10,613 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:50:10,613 INFO ]: Found error trace [2018-06-26 21:50:10,613 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:50:10,613 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:10,613 INFO ]: Analyzing trace with hash 1104615967, now seen corresponding path program 1 times [2018-06-26 21:50:10,613 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:10,613 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:10,615 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,616 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:10,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:10,705 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:10,868 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:10,869 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:10,869 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 [2018-06-26 21:50:10,875 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:10,964 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:10,974 INFO ]: Computing forward predicates... [2018-06-26 21:50:12,925 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:12,959 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:50:12,959 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:50:12,959 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:50:12,960 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:50:12,960 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:50:12,960 INFO ]: Start difference. First operand 7 states and 14 transitions. Second operand 5 states. [2018-06-26 21:50:13,122 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:13,122 INFO ]: Finished difference Result 11 states and 18 transitions. [2018-06-26 21:50:13,123 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:50:13,123 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:50:13,123 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:13,124 INFO ]: With dead ends: 11 [2018-06-26 21:50:13,124 INFO ]: Without dead ends: 11 [2018-06-26 21:50:13,124 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:50:13,124 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 21:50:13,125 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 8. [2018-06-26 21:50:13,125 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:50:13,126 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 15 transitions. [2018-06-26 21:50:13,126 INFO ]: Start accepts. Automaton has 8 states and 15 transitions. Word has length 6 [2018-06-26 21:50:13,126 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:13,126 INFO ]: Abstraction has 8 states and 15 transitions. [2018-06-26 21:50:13,126 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:50:13,127 INFO ]: Start isEmpty. Operand 8 states and 15 transitions. [2018-06-26 21:50:13,127 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:50:13,127 INFO ]: Found error trace [2018-06-26 21:50:13,127 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:50:13,127 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:13,127 INFO ]: Analyzing trace with hash 1108310051, now seen corresponding path program 1 times [2018-06-26 21:50:13,127 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:13,127 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:13,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:13,128 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:13,128 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:13,162 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:13,229 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:13,229 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:13,229 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 [2018-06-26 21:50:13,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:13,283 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:13,285 INFO ]: Computing forward predicates... [2018-06-26 21:50:14,581 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:14,601 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:50:14,601 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:50:14,601 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:50:14,601 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:50:14,601 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:50:14,601 INFO ]: Start difference. First operand 8 states and 15 transitions. Second operand 5 states. [2018-06-26 21:50:14,630 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:14,630 INFO ]: Finished difference Result 13 states and 20 transitions. [2018-06-26 21:50:14,630 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 21:50:14,630 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:50:14,630 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:14,630 INFO ]: With dead ends: 13 [2018-06-26 21:50:14,630 INFO ]: Without dead ends: 13 [2018-06-26 21:50:14,631 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:50:14,631 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:50:14,632 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 8. [2018-06-26 21:50:14,632 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:50:14,632 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 15 transitions. [2018-06-26 21:50:14,632 INFO ]: Start accepts. Automaton has 8 states and 15 transitions. Word has length 6 [2018-06-26 21:50:14,633 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:14,633 INFO ]: Abstraction has 8 states and 15 transitions. [2018-06-26 21:50:14,633 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:50:14,633 INFO ]: Start isEmpty. Operand 8 states and 15 transitions. [2018-06-26 21:50:14,633 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:50:14,633 INFO ]: Found error trace [2018-06-26 21:50:14,633 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:50:14,633 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:14,633 INFO ]: Analyzing trace with hash -117341879, now seen corresponding path program 2 times [2018-06-26 21:50:14,633 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:14,633 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:14,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:14,634 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:50:14,634 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:14,677 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:14,794 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:14,794 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:14,794 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 [2018-06-26 21:50:14,809 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:50:14,851 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:50:14,851 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:14,853 INFO ]: Computing forward predicates... [2018-06-26 21:50:21,851 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:21,870 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:50:21,870 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:50:21,871 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:50:21,871 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:50:21,871 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:50:21,871 INFO ]: Start difference. First operand 8 states and 15 transitions. Second operand 6 states. [2018-06-26 21:50:21,943 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:21,943 INFO ]: Finished difference Result 13 states and 20 transitions. [2018-06-26 21:50:21,943 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-26 21:50:21,943 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:50:21,943 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:21,944 INFO ]: With dead ends: 13 [2018-06-26 21:50:21,944 INFO ]: Without dead ends: 13 [2018-06-26 21:50:21,944 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:50:21,944 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:50:21,948 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-26 21:50:21,949 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:50:21,949 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2018-06-26 21:50:21,949 INFO ]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 7 [2018-06-26 21:50:21,949 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:21,949 INFO ]: Abstraction has 9 states and 16 transitions. [2018-06-26 21:50:21,949 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:50:21,949 INFO ]: Start isEmpty. Operand 9 states and 16 transitions. [2018-06-26 21:50:21,949 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:50:21,949 INFO ]: Found error trace [2018-06-26 21:50:21,949 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:50:21,949 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:21,950 INFO ]: Analyzing trace with hash -2825275, now seen corresponding path program 2 times [2018-06-26 21:50:21,950 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:21,950 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:21,951 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:21,951 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:50:21,951 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:21,996 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:22,174 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:22,175 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:22,175 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 [2018-06-26 21:50:22,181 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:50:22,211 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:50:22,211 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:22,213 INFO ]: Computing forward predicates... [2018-06-26 21:50:22,596 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:50:24,641 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:24,662 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:50:24,662 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:50:24,662 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:50:24,662 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:50:24,662 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:50:24,662 INFO ]: Start difference. First operand 9 states and 16 transitions. Second operand 6 states. [2018-06-26 21:50:24,788 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:24,788 INFO ]: Finished difference Result 18 states and 25 transitions. [2018-06-26 21:50:24,789 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-26 21:50:24,789 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:50:24,789 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:24,790 INFO ]: With dead ends: 18 [2018-06-26 21:50:24,790 INFO ]: Without dead ends: 18 [2018-06-26 21:50:24,790 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2018-06-26 21:50:24,790 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-26 21:50:24,792 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 9. [2018-06-26 21:50:24,792 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:50:24,793 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 16 transitions. [2018-06-26 21:50:24,793 INFO ]: Start accepts. Automaton has 9 states and 16 transitions. Word has length 7 [2018-06-26 21:50:24,793 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:24,793 INFO ]: Abstraction has 9 states and 16 transitions. [2018-06-26 21:50:24,793 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:50:24,793 INFO ]: Start isEmpty. Operand 9 states and 16 transitions. [2018-06-26 21:50:24,793 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:50:24,793 INFO ]: Found error trace [2018-06-26 21:50:24,793 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:50:24,793 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:24,793 INFO ]: Analyzing trace with hash 656670559, now seen corresponding path program 3 times [2018-06-26 21:50:24,793 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:24,793 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:24,794 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:24,794 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:50:24,794 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:24,850 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:25,886 WARN ]: Spent 851.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2018-06-26 21:50:26,136 WARN ]: Spent 176.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-26 21:50:26,148 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:26,148 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:26,148 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 [2018-06-26 21:50:26,154 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 21:50:26,236 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 21:50:26,236 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:26,240 INFO ]: Computing forward predicates... [2018-06-26 21:50:35,167 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:50:43,321 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:43,340 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:50:43,341 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-26 21:50:43,341 INFO ]: Interpolant automaton has 7 states [2018-06-26 21:50:43,341 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-26 21:50:43,341 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-26 21:50:43,341 INFO ]: Start difference. First operand 9 states and 16 transitions. Second operand 7 states. [2018-06-26 21:50:43,462 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:50:43,462 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-26 21:50:43,462 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-26 21:50:43,462 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-26 21:50:43,462 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:50:43,463 INFO ]: With dead ends: 15 [2018-06-26 21:50:43,463 INFO ]: Without dead ends: 15 [2018-06-26 21:50:43,463 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-26 21:50:43,463 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-26 21:50:43,464 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 10. [2018-06-26 21:50:43,464 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 21:50:43,465 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 17 transitions. [2018-06-26 21:50:43,465 INFO ]: Start accepts. Automaton has 10 states and 17 transitions. Word has length 8 [2018-06-26 21:50:43,465 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:50:43,465 INFO ]: Abstraction has 10 states and 17 transitions. [2018-06-26 21:50:43,465 INFO ]: Interpolant automaton has 7 states. [2018-06-26 21:50:43,465 INFO ]: Start isEmpty. Operand 10 states and 17 transitions. [2018-06-26 21:50:43,465 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:50:43,465 INFO ]: Found error trace [2018-06-26 21:50:43,465 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:50:43,465 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:50:43,465 INFO ]: Analyzing trace with hash -88282013, now seen corresponding path program 3 times [2018-06-26 21:50:43,465 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:50:43,465 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:50:43,467 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:43,467 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:50:43,467 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:50:43,521 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:43,710 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:50:43,710 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:50:43,710 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:50:43,731 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 21:50:43,790 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 21:50:43,790 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:50:43,793 INFO ]: Computing forward predicates... [2018-06-26 21:50:49,623 WARN ]: expecting exponential blowup for input size 10 [2018-06-26 21:50:49,683 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:50:50,059 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:50:50,114 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:50:50,410 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-26 21:51:12,810 INFO ]: Timeout while computing interpolants [2018-06-26 21:51:13,011 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:51:13,011 WARN ]: Verification canceled [2018-06-26 21:51:13,013 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:51:13,014 WARN ]: Timeout [2018-06-26 21:51:13,014 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:51:13 BasicIcfg [2018-06-26 21:51:13,014 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:51:13,015 INFO ]: Toolchain (without parser) took 63766.52 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 254.1 MB in the beginning and 512.3 MB in the end (delta: -258.2 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,016 INFO ]: SmtParser took 0.04 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:51:13,016 INFO ]: ChcToBoogie took 65.03 ms. Allocated memory is still 307.8 MB. Free memory was 254.1 MB in the beginning and 252.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,017 INFO ]: Boogie Preprocessor took 44.70 ms. Allocated memory is still 307.8 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,017 INFO ]: RCFGBuilder took 313.17 ms. Allocated memory is still 307.8 MB. Free memory was 250.1 MB in the beginning and 236.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,018 INFO ]: BlockEncodingV2 took 263.05 ms. Allocated memory is still 307.8 MB. Free memory was 236.0 MB in the beginning and 222.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,018 INFO ]: TraceAbstraction took 63071.19 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 222.1 MB in the beginning and 512.3 MB in the end (delta: -290.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-26 21:51:13,022 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.04 ms. Allocated memory is still 307.8 MB. Free memory is still 273.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 65.03 ms. Allocated memory is still 307.8 MB. Free memory was 254.1 MB in the beginning and 252.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 44.70 ms. Allocated memory is still 307.8 MB. Free memory was 252.1 MB in the beginning and 250.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 313.17 ms. Allocated memory is still 307.8 MB. Free memory was 250.1 MB in the beginning and 236.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 263.05 ms. Allocated memory is still 307.8 MB. Free memory was 236.0 MB in the beginning and 222.1 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63071.19 ms. Allocated memory was 307.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 222.1 MB in the beginning and 512.3 MB in the end (delta: -290.2 MB). Peak memory consumption was 1.3 GB. 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 Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while XnfDer was eliminating 21646 quantified variables from 15 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 63.0s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 0 SDslu, 48 SDs, 0 SdLazy, 99 SolverSat, 81 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=7, 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, 7 MinimizatonAttempts, 27 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 31.7s InterpolantComputationTime, 78 NumberOfCodeBlocks, 78 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 1244 SizeOfPredicates, 30 NumberOfNonLiveVariables, 918 ConjunctsInSsa, 116 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/28 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/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-51-13-042.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-51-13-042.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-51-13-042.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/sendmail-close-angle.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-51-13-042.csv Completed graceful shutdown