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/svd2.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 01:31:35,569 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 01:31:35,571 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 01:31:35,585 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 01:31:35,585 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 01:31:35,588 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 01:31:35,590 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 01:31:35,592 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 01:31:35,594 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 01:31:35,597 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 01:31:35,598 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 01:31:35,598 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 01:31:35,599 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 01:31:35,600 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 01:31:35,601 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 01:31:35,604 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 01:31:35,606 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 01:31:35,619 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 01:31:35,620 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 01:31:35,621 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 01:31:35,622 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 01:31:35,624 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 01:31:35,624 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 01:31:35,624 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 01:31:35,625 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 01:31:35,626 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 01:31:35,627 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 01:31:35,632 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 01:31:35,633 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 01:31:35,633 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 01:31:35,634 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 01:31:35,634 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 01:31:35,634 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 01:31:35,640 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 01:31:35,641 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 01:31:35,641 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 01:31:35,662 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 01:31:35,662 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 01:31:35,662 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 01:31:35,662 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 01:31:35,666 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 01:31:35,666 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 01:31:35,666 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 01:31:35,667 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 01:31:35,667 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 01:31:35,667 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 01:31:35,667 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 01:31:35,667 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 01:31:35,667 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:31:35,668 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 01:31:35,668 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 01:31:35,668 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 01:31:35,668 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 01:31:35,668 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 01:31:35,668 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 01:31:35,670 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 01:31:35,670 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 01:31:35,671 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 01:31:35,671 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 01:31:35,727 INFO ]: Repository-Root is: /tmp [2018-06-25 01:31:35,743 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 01:31:35,747 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 01:31:35,748 INFO ]: Initializing SmtParser... [2018-06-25 01:31:35,748 INFO ]: SmtParser initialized [2018-06-25 01:31:35,749 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd2.c.smt2 [2018-06-25 01:31:35,750 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-25 01:31:35,831 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd2.c.smt2 unknown [2018-06-25 01:31:36,141 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/svd2.c.smt2 [2018-06-25 01:31:36,146 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 01:31:36,154 INFO ]: Walking toolchain with 5 elements. [2018-06-25 01:31:36,154 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 01:31:36,154 INFO ]: Initializing ChcToBoogie... [2018-06-25 01:31:36,155 INFO ]: ChcToBoogie initialized [2018-06-25 01:31:36,158 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,217 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36 Unit [2018-06-25 01:31:36,217 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 01:31:36,218 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 01:31:36,218 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 01:31:36,218 INFO ]: Boogie Preprocessor initialized [2018-06-25 01:31:36,239 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,239 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,247 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,247 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,266 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,268 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,270 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,272 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 01:31:36,273 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 01:31:36,273 INFO ]: Initializing RCFGBuilder... [2018-06-25 01:31:36,273 INFO ]: RCFGBuilder initialized [2018-06-25 01:31:36,274 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-25 01:31:36,296 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 01:31:36,296 INFO ]: Found specification of procedure gotoProc [2018-06-25 01:31:36,296 INFO ]: Found implementation of procedure gotoProc [2018-06-25 01:31:36,296 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 01:31:36,296 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 01:31:36,296 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 01:31:36,607 INFO ]: Using library mode [2018-06-25 01:31:36,608 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:31:36 BoogieIcfgContainer [2018-06-25 01:31:36,608 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 01:31:36,608 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-25 01:31:36,608 INFO ]: Initializing BlockEncodingV2... [2018-06-25 01:31:36,609 INFO ]: BlockEncodingV2 initialized [2018-06-25 01:31:36,610 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:31:36" (1/1) ... [2018-06-25 01:31:36,624 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-25 01:31:36,626 INFO ]: Using Remove infeasible edges [2018-06-25 01:31:36,626 INFO ]: Using Maximize final states [2018-06-25 01:31:36,626 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-25 01:31:36,627 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-25 01:31:36,628 INFO ]: Using Remove sink states [2018-06-25 01:31:36,629 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-25 01:31:36,629 INFO ]: Using Use SBE [2018-06-25 01:31:36,634 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 01:31:36,709 WARN ]: aborting because of expected exponential blowup for input size 56 [2018-06-25 01:31:36,720 WARN ]: aborting because of expected exponential blowup for input size 56 [2018-06-25 01:31:36,721 INFO ]: SBE split 1 edges [2018-06-25 01:31:36,726 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-25 01:31:36,727 INFO ]: 0 new accepting states [2018-06-25 01:31:36,779 INFO ]: Removed 5 edges and 2 locations by large block encoding [2018-06-25 01:31:36,781 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:31:36,783 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-25 01:31:36,784 INFO ]: 0 new accepting states [2018-06-25 01:31:36,784 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-25 01:31:36,784 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-25 01:31:36,784 INFO ]: Encoded RCFG 6 locations, 7 edges [2018-06-25 01:31:36,784 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:31:36 BasicIcfg [2018-06-25 01:31:36,785 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-25 01:31:36,786 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 01:31:36,786 INFO ]: Initializing TraceAbstraction... [2018-06-25 01:31:36,792 INFO ]: TraceAbstraction initialized [2018-06-25 01:31:36,792 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:31:36" (1/4) ... [2018-06-25 01:31:36,795 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d596cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:31:36, skipping insertion in model container [2018-06-25 01:31:36,795 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:31:36" (2/4) ... [2018-06-25 01:31:36,795 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d596cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:31:36, skipping insertion in model container [2018-06-25 01:31:36,795 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:31:36" (3/4) ... [2018-06-25 01:31:36,796 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d596cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:31:36, skipping insertion in model container [2018-06-25 01:31:36,796 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 25.06 01:31:36" (4/4) ... [2018-06-25 01:31:36,797 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-25 01:31:36,809 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 01:31:36,818 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 01:31:36,872 INFO ]: Using default assertion order modulation [2018-06-25 01:31:36,873 INFO ]: Interprodecural is true [2018-06-25 01:31:36,873 INFO ]: Hoare is false [2018-06-25 01:31:36,873 INFO ]: Compute interpolants for FPandBP [2018-06-25 01:31:36,873 INFO ]: Backedges is TWOTRACK [2018-06-25 01:31:36,873 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 01:31:36,873 INFO ]: Difference is false [2018-06-25 01:31:36,873 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 01:31:36,873 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 01:31:36,887 INFO ]: Start isEmpty. Operand 6 states. [2018-06-25 01:31:36,901 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:31:36,901 INFO ]: Found error trace [2018-06-25 01:31:36,902 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:31:36,902 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:31:36,907 INFO ]: Analyzing trace with hash 35465027, now seen corresponding path program 1 times [2018-06-25 01:31:36,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:31:36,910 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:31:36,946 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:36,946 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:31:36,946 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:36,997 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:37,076 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:37,078 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:31:37,078 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:31:37,080 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:31:37,093 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:31:37,093 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:31:37,096 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-25 01:31:37,171 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:31:37,171 INFO ]: Finished difference Result 7 states and 8 transitions. [2018-06-25 01:31:37,176 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:31:37,177 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:31:37,177 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:31:37,186 INFO ]: With dead ends: 7 [2018-06-25 01:31:37,186 INFO ]: Without dead ends: 7 [2018-06-25 01:31:37,188 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:31:37,202 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-25 01:31:37,228 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-25 01:31:37,229 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:31:37,236 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-06-25 01:31:37,237 INFO ]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-06-25 01:31:37,237 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:31:37,237 INFO ]: Abstraction has 7 states and 8 transitions. [2018-06-25 01:31:37,237 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:31:37,237 INFO ]: Start isEmpty. Operand 7 states and 8 transitions. [2018-06-25 01:31:37,238 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-25 01:31:37,238 INFO ]: Found error trace [2018-06-25 01:31:37,238 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-25 01:31:37,238 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:31:37,238 INFO ]: Analyzing trace with hash 35494818, now seen corresponding path program 1 times [2018-06-25 01:31:37,238 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:31:37,238 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:31:37,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:37,244 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:31:37,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:37,252 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:37,314 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:37,314 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 01:31:37,314 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 01:31:37,316 INFO ]: Interpolant automaton has 3 states [2018-06-25 01:31:37,316 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 01:31:37,316 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:31:37,316 INFO ]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2018-06-25 01:31:37,383 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:31:37,383 INFO ]: Finished difference Result 8 states and 9 transitions. [2018-06-25 01:31:37,384 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 01:31:37,384 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-25 01:31:37,385 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:31:37,385 INFO ]: With dead ends: 8 [2018-06-25 01:31:37,385 INFO ]: Without dead ends: 8 [2018-06-25 01:31:37,386 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 01:31:37,386 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:31:37,387 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-25 01:31:37,387 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-25 01:31:37,387 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2018-06-25 01:31:37,387 INFO ]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2018-06-25 01:31:37,387 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:31:37,387 INFO ]: Abstraction has 7 states and 8 transitions. [2018-06-25 01:31:37,387 INFO ]: Interpolant automaton has 3 states. [2018-06-25 01:31:37,387 INFO ]: Start isEmpty. Operand 7 states and 8 transitions. [2018-06-25 01:31:37,388 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-25 01:31:37,388 INFO ]: Found error trace [2018-06-25 01:31:37,388 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-25 01:31:37,388 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:31:37,388 INFO ]: Analyzing trace with hash 1099033518, now seen corresponding path program 1 times [2018-06-25 01:31:37,388 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:31:37,388 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:31:37,390 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:37,390 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:31:37,390 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:37,488 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:37,846 WARN ]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-25 01:31:37,847 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:37,847 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:31:37,847 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:31:37,855 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:31:37,909 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:37,918 INFO ]: Computing forward predicates... [2018-06-25 01:31:39,458 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:39,485 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:31:39,485 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 01:31:39,485 INFO ]: Interpolant automaton has 5 states [2018-06-25 01:31:39,485 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 01:31:39,485 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-25 01:31:39,485 INFO ]: Start difference. First operand 7 states and 8 transitions. Second operand 5 states. [2018-06-25 01:31:39,612 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:31:39,612 INFO ]: Finished difference Result 8 states and 9 transitions. [2018-06-25 01:31:39,612 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 01:31:39,612 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-25 01:31:39,612 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:31:39,612 INFO ]: With dead ends: 8 [2018-06-25 01:31:39,613 INFO ]: Without dead ends: 8 [2018-06-25 01:31:39,613 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 [2018-06-25 01:31:39,613 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-25 01:31:39,614 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-25 01:31:39,614 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-25 01:31:39,614 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2018-06-25 01:31:39,614 INFO ]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2018-06-25 01:31:39,614 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:31:39,614 INFO ]: Abstraction has 8 states and 9 transitions. [2018-06-25 01:31:39,614 INFO ]: Interpolant automaton has 5 states. [2018-06-25 01:31:39,614 INFO ]: Start isEmpty. Operand 8 states and 9 transitions. [2018-06-25 01:31:39,615 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 01:31:39,615 INFO ]: Found error trace [2018-06-25 01:31:39,615 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-25 01:31:39,615 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:31:39,615 INFO ]: Analyzing trace with hash -290081629, now seen corresponding path program 2 times [2018-06-25 01:31:39,615 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:31:39,615 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:31:39,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:39,616 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:31:39,616 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:39,689 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:39,969 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:39,969 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:31:39,969 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:31:39,977 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 01:31:40,047 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 01:31:40,047 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:40,050 INFO ]: Computing forward predicates... [2018-06-25 01:31:40,693 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:31:42,844 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:42,863 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:31:42,863 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 01:31:42,863 INFO ]: Interpolant automaton has 6 states [2018-06-25 01:31:42,863 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 01:31:42,863 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-25 01:31:42,864 INFO ]: Start difference. First operand 8 states and 9 transitions. Second operand 6 states. [2018-06-25 01:31:43,013 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:31:43,014 INFO ]: Finished difference Result 10 states and 11 transitions. [2018-06-25 01:31:43,014 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:31:43,014 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-25 01:31:43,014 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:31:43,014 INFO ]: With dead ends: 10 [2018-06-25 01:31:43,014 INFO ]: Without dead ends: 10 [2018-06-25 01:31:43,014 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:31:43,014 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 01:31:43,015 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 9. [2018-06-25 01:31:43,015 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 01:31:43,016 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-06-25 01:31:43,016 INFO ]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2018-06-25 01:31:43,016 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:31:43,016 INFO ]: Abstraction has 9 states and 10 transitions. [2018-06-25 01:31:43,016 INFO ]: Interpolant automaton has 6 states. [2018-06-25 01:31:43,016 INFO ]: Start isEmpty. Operand 9 states and 10 transitions. [2018-06-25 01:31:43,016 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:31:43,016 INFO ]: Found error trace [2018-06-25 01:31:43,016 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:31:43,016 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:31:43,017 INFO ]: Analyzing trace with hash -402978226, now seen corresponding path program 3 times [2018-06-25 01:31:43,017 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:31:43,017 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:31:43,017 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:43,017 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:31:43,017 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:31:43,066 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:43,306 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 01:31:43,415 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:31:43,415 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:31:43,415 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:31:43,421 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 01:31:43,469 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 01:31:43,469 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:31:43,472 INFO ]: Computing forward predicates... [2018-06-25 01:32:01,341 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:32:05,984 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:32:06,004 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:32:06,004 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-25 01:32:06,004 INFO ]: Interpolant automaton has 8 states [2018-06-25 01:32:06,005 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 01:32:06,005 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 01:32:06,005 INFO ]: Start difference. First operand 9 states and 10 transitions. Second operand 8 states. [2018-06-25 01:32:06,138 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:32:06,138 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-25 01:32:06,138 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:32:06,138 INFO ]: Start accepts. Automaton has 8 states. Word has length 8 [2018-06-25 01:32:06,138 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:32:06,139 INFO ]: With dead ends: 13 [2018-06-25 01:32:06,139 INFO ]: Without dead ends: 13 [2018-06-25 01:32:06,139 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2018-06-25 01:32:06,139 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 01:32:06,140 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 10. [2018-06-25 01:32:06,140 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:32:06,141 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-06-25 01:32:06,141 INFO ]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-06-25 01:32:06,141 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:32:06,141 INFO ]: Abstraction has 10 states and 11 transitions. [2018-06-25 01:32:06,141 INFO ]: Interpolant automaton has 8 states. [2018-06-25 01:32:06,141 INFO ]: Start isEmpty. Operand 10 states and 11 transitions. [2018-06-25 01:32:06,141 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 01:32:06,141 INFO ]: Found error trace [2018-06-25 01:32:06,141 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-25 01:32:06,141 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:32:06,141 INFO ]: Analyzing trace with hash 484525455, now seen corresponding path program 1 times [2018-06-25 01:32:06,141 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:32:06,141 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:32:06,142 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:32:06,142 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 01:32:06,142 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:32:06,195 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:32:06,423 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:32:06,423 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:32:06,423 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:32:06,431 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:32:06,479 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:32:06,481 INFO ]: Computing forward predicates... [2018-06-25 01:32:06,685 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:32:09,002 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:32:09,023 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 01:32:09,023 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-25 01:32:09,023 INFO ]: Interpolant automaton has 7 states [2018-06-25 01:32:09,023 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 01:32:09,023 INFO ]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-25 01:32:09,023 INFO ]: Start difference. First operand 10 states and 11 transitions. Second operand 7 states. [2018-06-25 01:32:09,141 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 01:32:09,142 INFO ]: Finished difference Result 14 states and 15 transitions. [2018-06-25 01:32:09,142 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 01:32:09,142 INFO ]: Start accepts. Automaton has 7 states. Word has length 8 [2018-06-25 01:32:09,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 01:32:09,142 INFO ]: With dead ends: 14 [2018-06-25 01:32:09,142 INFO ]: Without dead ends: 14 [2018-06-25 01:32:09,143 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2018-06-25 01:32:09,143 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 01:32:09,144 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 10. [2018-06-25 01:32:09,144 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 01:32:09,144 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2018-06-25 01:32:09,144 INFO ]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2018-06-25 01:32:09,144 INFO ]: Finished accepts. word is rejected. [2018-06-25 01:32:09,144 INFO ]: Abstraction has 10 states and 11 transitions. [2018-06-25 01:32:09,144 INFO ]: Interpolant automaton has 7 states. [2018-06-25 01:32:09,144 INFO ]: Start isEmpty. Operand 10 states and 11 transitions. [2018-06-25 01:32:09,145 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 01:32:09,145 INFO ]: Found error trace [2018-06-25 01:32:09,145 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-25 01:32:09,145 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 01:32:09,145 INFO ]: Analyzing trace with hash 392194563, now seen corresponding path program 4 times [2018-06-25 01:32:09,145 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 01:32:09,145 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 01:32:09,145 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:32:09,145 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 01:32:09,145 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 01:32:09,220 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:32:09,580 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-25 01:32:09,625 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 01:32:09,626 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 01:32:09,626 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 01:32:09,632 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 01:32:09,684 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 01:32:09,684 INFO ]: Conjunction of SSA is unsat [2018-06-25 01:32:09,688 INFO ]: Computing forward predicates... [2018-06-25 01:32:10,960 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:32:11,057 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:32:11,135 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 01:32:11,147 WARN ]: expecting exponential blowup for input size 8 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown