java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/reve/018-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:05:23,057 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:05:23,059 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:05:23,073 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:05:23,074 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:05:23,074 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:05:23,076 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:05:23,078 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:05:23,080 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:05:23,080 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:05:23,082 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:05:23,083 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:05:23,083 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:05:23,084 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:05:23,085 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:05:23,088 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:05:23,090 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:05:23,101 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:05:23,103 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:05:23,104 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:05:23,105 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:05:23,107 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:05:23,108 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:05:23,108 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:05:23,109 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:05:23,109 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:05:23,110 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:05:23,111 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:05:23,112 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:05:23,112 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:05:23,115 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:05:23,116 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:05:23,116 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:05:23,117 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:05:23,117 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:05:23,118 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:05:23,140 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:05:23,140 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:05:23,141 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:05:23,141 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:05:23,142 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:05:23,142 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:05:23,142 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:05:23,142 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:05:23,145 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:05:23,146 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:05:23,146 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:05:23,146 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:05:23,146 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:05:23,147 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:05:23,147 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:05:23,147 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:05:23,147 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:05:23,147 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:05:23,148 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:05:23,148 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:05:23,148 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:05:23,151 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:05:23,151 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:05:23,205 INFO ]: Repository-Root is: /tmp [2018-06-24 21:05:23,226 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:05:23,229 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:05:23,231 INFO ]: Initializing SmtParser... [2018-06-24 21:05:23,232 INFO ]: SmtParser initialized [2018-06-24 21:05:23,232 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/018-horn.smt2 [2018-06-24 21:05:23,234 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-24 21:05:23,324 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/018-horn.smt2 unknown [2018-06-24 21:05:23,598 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/018-horn.smt2 [2018-06-24 21:05:23,608 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:05:23,613 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:05:23,614 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:05:23,614 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:05:23,614 INFO ]: ChcToBoogie initialized [2018-06-24 21:05:23,618 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,683 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23 Unit [2018-06-24 21:05:23,683 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:05:23,684 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:05:23,684 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:05:23,684 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:05:23,707 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,707 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,713 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,713 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,721 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,729 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,731 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... [2018-06-24 21:05:23,733 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:05:23,734 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:05:23,734 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:05:23,734 INFO ]: RCFGBuilder initialized [2018-06-24 21:05:23,735 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-24 21:05:23,756 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:05:23,756 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:05:23,756 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:05:23,756 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:05:23,756 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:05:23,756 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:05:24,190 INFO ]: Using library mode [2018-06-24 21:05:24,190 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:05:24 BoogieIcfgContainer [2018-06-24 21:05:24,190 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:05:24,191 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:05:24,191 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:05:24,191 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:05:24,192 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:05:24" (1/1) ... [2018-06-24 21:05:24,208 INFO ]: Initial Icfg 13 locations, 27 edges [2018-06-24 21:05:24,210 INFO ]: Using Remove infeasible edges [2018-06-24 21:05:24,210 INFO ]: Using Maximize final states [2018-06-24 21:05:24,212 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:05:24,212 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:05:24,213 INFO ]: Using Remove sink states [2018-06-24 21:05:24,214 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:05:24,214 INFO ]: Using Use SBE [2018-06-24 21:05:24,223 INFO ]: SBE split 0 edges [2018-06-24 21:05:24,233 INFO ]: Removed 12 edges and 4 locations because of local infeasibility [2018-06-24 21:05:24,235 INFO ]: 0 new accepting states [2018-06-24 21:05:24,262 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-24 21:05:24,264 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:05:24,266 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:05:24,266 INFO ]: 0 new accepting states [2018-06-24 21:05:24,266 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:05:24,266 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:05:24,266 INFO ]: Encoded RCFG 7 locations, 13 edges [2018-06-24 21:05:24,267 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:05:24 BasicIcfg [2018-06-24 21:05:24,267 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:05:24,268 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:05:24,268 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:05:24,271 INFO ]: TraceAbstraction initialized [2018-06-24 21:05:24,271 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:05:23" (1/4) ... [2018-06-24 21:05:24,272 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3427db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:05:24, skipping insertion in model container [2018-06-24 21:05:24,272 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:05:23" (2/4) ... [2018-06-24 21:05:24,272 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3427db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:05:24, skipping insertion in model container [2018-06-24 21:05:24,272 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:05:24" (3/4) ... [2018-06-24 21:05:24,272 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3427db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:05:24, skipping insertion in model container [2018-06-24 21:05:24,272 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:05:24" (4/4) ... [2018-06-24 21:05:24,274 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:05:24,285 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:05:24,300 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:05:24,347 INFO ]: Using default assertion order modulation [2018-06-24 21:05:24,348 INFO ]: Interprodecural is true [2018-06-24 21:05:24,348 INFO ]: Hoare is false [2018-06-24 21:05:24,348 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:05:24,348 INFO ]: Backedges is TWOTRACK [2018-06-24 21:05:24,348 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:05:24,348 INFO ]: Difference is false [2018-06-24 21:05:24,348 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:05:24,348 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:05:24,356 INFO ]: Start isEmpty. Operand 7 states. [2018-06-24 21:05:24,365 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:05:24,366 INFO ]: Found error trace [2018-06-24 21:05:24,367 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:05:24,367 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:24,372 INFO ]: Analyzing trace with hash 34080772, now seen corresponding path program 1 times [2018-06-24 21:05:24,374 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:24,374 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:24,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,410 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:24,410 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,455 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:24,501 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:24,503 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:05:24,503 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:05:24,504 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:05:24,516 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:05:24,516 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:24,518 INFO ]: Start difference. First operand 7 states. Second operand 3 states. [2018-06-24 21:05:24,598 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:24,598 INFO ]: Finished difference Result 8 states and 16 transitions. [2018-06-24 21:05:24,600 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:05:24,602 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:05:24,602 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:24,612 INFO ]: With dead ends: 8 [2018-06-24 21:05:24,612 INFO ]: Without dead ends: 8 [2018-06-24 21:05:24,613 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:24,626 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-24 21:05:24,641 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-24 21:05:24,642 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-24 21:05:24,642 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-06-24 21:05:24,643 INFO ]: Start accepts. Automaton has 8 states and 16 transitions. Word has length 5 [2018-06-24 21:05:24,643 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:24,644 INFO ]: Abstraction has 8 states and 16 transitions. [2018-06-24 21:05:24,644 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:05:24,646 INFO ]: Start isEmpty. Operand 8 states and 16 transitions. [2018-06-24 21:05:24,646 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:05:24,646 INFO ]: Found error trace [2018-06-24 21:05:24,646 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:05:24,647 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:24,647 INFO ]: Analyzing trace with hash 34109602, now seen corresponding path program 1 times [2018-06-24 21:05:24,647 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:24,647 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:24,648 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,648 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:24,648 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,662 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:24,705 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:24,705 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:05:24,705 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:05:24,707 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:05:24,707 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:05:24,707 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:24,707 INFO ]: Start difference. First operand 8 states and 16 transitions. Second operand 3 states. [2018-06-24 21:05:24,803 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:24,803 INFO ]: Finished difference Result 9 states and 19 transitions. [2018-06-24 21:05:24,804 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:05:24,804 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:05:24,804 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:24,804 INFO ]: With dead ends: 9 [2018-06-24 21:05:24,805 INFO ]: Without dead ends: 9 [2018-06-24 21:05:24,805 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:24,805 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-24 21:05:24,807 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-24 21:05:24,807 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-24 21:05:24,807 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2018-06-24 21:05:24,807 INFO ]: Start accepts. Automaton has 9 states and 19 transitions. Word has length 5 [2018-06-24 21:05:24,807 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:24,807 INFO ]: Abstraction has 9 states and 19 transitions. [2018-06-24 21:05:24,807 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:05:24,807 INFO ]: Start isEmpty. Operand 9 states and 19 transitions. [2018-06-24 21:05:24,807 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:05:24,807 INFO ]: Found error trace [2018-06-24 21:05:24,807 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:05:24,807 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:24,808 INFO ]: Analyzing trace with hash 1055643953, now seen corresponding path program 1 times [2018-06-24 21:05:24,808 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:24,808 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:24,809 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,809 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:24,809 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:24,837 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:24,973 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:24,973 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:05:24,973 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:05:24,990 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,033 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,041 INFO ]: Computing forward predicates... [2018-06-24 21:05:25,115 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,135 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:05:25,135 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-24 21:05:25,135 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:05:25,135 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:05:25,135 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:25,135 INFO ]: Start difference. First operand 9 states and 19 transitions. Second operand 4 states. [2018-06-24 21:05:25,207 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:25,207 INFO ]: Finished difference Result 13 states and 30 transitions. [2018-06-24 21:05:25,208 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:05:25,208 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-24 21:05:25,208 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:25,210 INFO ]: With dead ends: 13 [2018-06-24 21:05:25,210 INFO ]: Without dead ends: 13 [2018-06-24 21:05:25,210 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:25,210 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-24 21:05:25,214 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-06-24 21:05:25,214 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-24 21:05:25,214 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 29 transitions. [2018-06-24 21:05:25,214 INFO ]: Start accepts. Automaton has 12 states and 29 transitions. Word has length 6 [2018-06-24 21:05:25,214 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:25,215 INFO ]: Abstraction has 12 states and 29 transitions. [2018-06-24 21:05:25,215 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:05:25,215 INFO ]: Start isEmpty. Operand 12 states and 29 transitions. [2018-06-24 21:05:25,215 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:05:25,215 INFO ]: Found error trace [2018-06-24 21:05:25,215 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:05:25,215 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:25,215 INFO ]: Analyzing trace with hash 1055703535, now seen corresponding path program 1 times [2018-06-24 21:05:25,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:25,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:25,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,216 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,227 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,275 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,275 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:05:25,275 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:05:25,285 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,316 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,317 INFO ]: Computing forward predicates... [2018-06-24 21:05:25,335 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,357 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:05:25,357 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-24 21:05:25,357 INFO ]: Interpolant automaton has 5 states [2018-06-24 21:05:25,357 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 21:05:25,358 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-24 21:05:25,358 INFO ]: Start difference. First operand 12 states and 29 transitions. Second operand 5 states. [2018-06-24 21:05:25,700 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:25,700 INFO ]: Finished difference Result 16 states and 36 transitions. [2018-06-24 21:05:25,700 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:05:25,700 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-24 21:05:25,700 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:25,701 INFO ]: With dead ends: 16 [2018-06-24 21:05:25,701 INFO ]: Without dead ends: 16 [2018-06-24 21:05:25,701 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:05:25,701 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 21:05:25,704 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-24 21:05:25,704 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-24 21:05:25,704 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 36 transitions. [2018-06-24 21:05:25,704 INFO ]: Start accepts. Automaton has 16 states and 36 transitions. Word has length 6 [2018-06-24 21:05:25,705 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:25,705 INFO ]: Abstraction has 16 states and 36 transitions. [2018-06-24 21:05:25,705 INFO ]: Interpolant automaton has 5 states. [2018-06-24 21:05:25,705 INFO ]: Start isEmpty. Operand 16 states and 36 transitions. [2018-06-24 21:05:25,705 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:05:25,705 INFO ]: Found error trace [2018-06-24 21:05:25,705 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:05:25,705 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:25,705 INFO ]: Analyzing trace with hash 1057043169, now seen corresponding path program 1 times [2018-06-24 21:05:25,705 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:25,705 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:25,706 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,706 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,706 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,716 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,796 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,796 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:05:25,796 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:05:25,796 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:05:25,796 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:05:25,796 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:25,797 INFO ]: Start difference. First operand 16 states and 36 transitions. Second operand 3 states. [2018-06-24 21:05:25,825 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:25,825 INFO ]: Finished difference Result 18 states and 40 transitions. [2018-06-24 21:05:25,826 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:05:25,826 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 21:05:25,826 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:25,826 INFO ]: With dead ends: 18 [2018-06-24 21:05:25,826 INFO ]: Without dead ends: 16 [2018-06-24 21:05:25,827 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:05:25,827 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-24 21:05:25,829 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-24 21:05:25,829 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-24 21:05:25,830 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 32 transitions. [2018-06-24 21:05:25,830 INFO ]: Start accepts. Automaton has 16 states and 32 transitions. Word has length 6 [2018-06-24 21:05:25,830 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:25,830 INFO ]: Abstraction has 16 states and 32 transitions. [2018-06-24 21:05:25,830 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:05:25,830 INFO ]: Start isEmpty. Operand 16 states and 32 transitions. [2018-06-24 21:05:25,830 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:05:25,830 INFO ]: Found error trace [2018-06-24 21:05:25,830 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:05:25,830 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:25,831 INFO ]: Analyzing trace with hash 1057072960, now seen corresponding path program 1 times [2018-06-24 21:05:25,831 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:25,831 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:25,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,831 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,831 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:25,847 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,884 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,884 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:05:25,884 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:05:25,891 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:25,921 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:25,923 INFO ]: Computing forward predicates... [2018-06-24 21:05:25,955 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:25,974 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:05:25,974 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-24 21:05:25,974 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:05:25,974 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:05:25,974 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:25,975 INFO ]: Start difference. First operand 16 states and 32 transitions. Second operand 4 states. [2018-06-24 21:05:25,995 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:25,995 INFO ]: Finished difference Result 18 states and 34 transitions. [2018-06-24 21:05:25,995 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:05:25,995 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-24 21:05:25,995 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:25,995 INFO ]: With dead ends: 18 [2018-06-24 21:05:25,996 INFO ]: Without dead ends: 18 [2018-06-24 21:05:25,996 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:25,996 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-24 21:05:25,998 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 17. [2018-06-24 21:05:25,998 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-24 21:05:25,998 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 33 transitions. [2018-06-24 21:05:25,999 INFO ]: Start accepts. Automaton has 17 states and 33 transitions. Word has length 6 [2018-06-24 21:05:25,999 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:25,999 INFO ]: Abstraction has 17 states and 33 transitions. [2018-06-24 21:05:25,999 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:05:25,999 INFO ]: Start isEmpty. Operand 17 states and 33 transitions. [2018-06-24 21:05:25,999 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 21:05:25,999 INFO ]: Found error trace [2018-06-24 21:05:25,999 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-24 21:05:25,999 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:25,999 INFO ]: Analyzing trace with hash -1635635804, now seen corresponding path program 2 times [2018-06-24 21:05:25,999 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:25,999 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:26,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,000 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:26,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,018 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:26,231 INFO ]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:26,231 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:05:26,231 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:05:26,237 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:05:26,265 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:05:26,265 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:26,267 INFO ]: Computing forward predicates... [2018-06-24 21:05:26,354 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:26,385 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:05:26,385 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2018-06-24 21:05:26,385 INFO ]: Interpolant automaton has 7 states [2018-06-24 21:05:26,385 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 21:05:26,385 INFO ]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:05:26,385 INFO ]: Start difference. First operand 17 states and 33 transitions. Second operand 7 states. [2018-06-24 21:05:26,811 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:26,811 INFO ]: Finished difference Result 23 states and 42 transitions. [2018-06-24 21:05:26,812 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-24 21:05:26,812 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-24 21:05:26,812 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:26,812 INFO ]: With dead ends: 23 [2018-06-24 21:05:26,812 INFO ]: Without dead ends: 18 [2018-06-24 21:05:26,812 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:05:26,812 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-24 21:05:26,814 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 13. [2018-06-24 21:05:26,814 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-24 21:05:26,815 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 20 transitions. [2018-06-24 21:05:26,815 INFO ]: Start accepts. Automaton has 13 states and 20 transitions. Word has length 7 [2018-06-24 21:05:26,815 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:26,815 INFO ]: Abstraction has 13 states and 20 transitions. [2018-06-24 21:05:26,815 INFO ]: Interpolant automaton has 7 states. [2018-06-24 21:05:26,815 INFO ]: Start isEmpty. Operand 13 states and 20 transitions. [2018-06-24 21:05:26,815 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-24 21:05:26,815 INFO ]: Found error trace [2018-06-24 21:05:26,815 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-24 21:05:26,815 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:26,815 INFO ]: Analyzing trace with hash -1590801310, now seen corresponding path program 2 times [2018-06-24 21:05:26,815 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:26,815 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:26,816 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,816 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:05:26,816 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,824 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:26,927 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:26,927 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:05:26,927 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 21:05:26,927 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:05:26,928 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:05:26,928 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:26,928 INFO ]: Start difference. First operand 13 states and 20 transitions. Second operand 4 states. [2018-06-24 21:05:26,932 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:26,932 INFO ]: Finished difference Result 13 states and 19 transitions. [2018-06-24 21:05:26,933 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:05:26,933 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-24 21:05:26,933 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:26,933 INFO ]: With dead ends: 13 [2018-06-24 21:05:26,933 INFO ]: Without dead ends: 10 [2018-06-24 21:05:26,934 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:05:26,934 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-24 21:05:26,935 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-24 21:05:26,935 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-24 21:05:26,935 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-24 21:05:26,935 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-24 21:05:26,935 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:26,935 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-24 21:05:26,935 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:05:26,935 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-24 21:05:26,935 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-24 21:05:26,935 INFO ]: Found error trace [2018-06-24 21:05:26,935 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:05:26,935 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:05:26,936 INFO ]: Analyzing trace with hash 1031112389, now seen corresponding path program 1 times [2018-06-24 21:05:26,936 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:05:26,936 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:05:26,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,936 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:05:26,936 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:05:26,950 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:27,015 INFO ]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:05:27,015 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:05:27,016 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 [2018-06-24 21:05:27,022 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:05:27,049 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:05:27,051 INFO ]: Computing forward predicates... [2018-06-24 21:05:27,083 INFO ]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:05:27,110 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-24 21:05:27,110 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2018-06-24 21:05:27,110 INFO ]: Interpolant automaton has 8 states [2018-06-24 21:05:27,110 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-24 21:05:27,110 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:05:27,110 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 8 states. [2018-06-24 21:05:27,246 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:05:27,246 INFO ]: Finished difference Result 12 states and 16 transitions. [2018-06-24 21:05:27,246 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-24 21:05:27,247 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-24 21:05:27,247 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:05:27,247 INFO ]: With dead ends: 12 [2018-06-24 21:05:27,247 INFO ]: Without dead ends: 0 [2018-06-24 21:05:27,247 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2018-06-24 21:05:27,247 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:05:27,247 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:05:27,247 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:05:27,247 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:05:27,247 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-24 21:05:27,247 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:05:27,247 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:05:27,247 INFO ]: Interpolant automaton has 8 states. [2018-06-24 21:05:27,247 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:05:27,247 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:05:27,249 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:05:27,251 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:05:27 BasicIcfg [2018-06-24 21:05:27,251 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:05:27,252 INFO ]: Toolchain (without parser) took 3643.32 ms. Allocated memory was 309.3 MB in the beginning and 327.7 MB in the end (delta: 18.4 MB). Free memory was 259.7 MB in the beginning and 225.4 MB in the end (delta: 34.4 MB). Peak memory consumption was 52.7 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,253 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:05:27,254 INFO ]: ChcToBoogie took 69.66 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,254 INFO ]: Boogie Preprocessor took 49.58 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,255 INFO ]: RCFGBuilder took 456.36 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 239.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,255 INFO ]: BlockEncodingV2 took 76.07 ms. Allocated memory is still 309.3 MB. Free memory was 239.7 MB in the beginning and 235.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,256 INFO ]: TraceAbstraction took 2983.19 ms. Allocated memory was 309.3 MB in the beginning and 327.7 MB in the end (delta: 18.4 MB). Free memory was 235.8 MB in the beginning and 225.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 28.8 MB. Max. memory is 3.6 GB. [2018-06-24 21:05:27,260 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 13 locations, 27 edges - StatisticsResult: Encoded RCFG 7 locations, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 69.66 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 257.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 49.58 ms. Allocated memory is still 309.3 MB. Free memory was 257.7 MB in the beginning and 255.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 456.36 ms. Allocated memory is still 309.3 MB. Free memory was 255.7 MB in the beginning and 239.7 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 76.07 ms. Allocated memory is still 309.3 MB. Free memory was 239.7 MB in the beginning and 235.8 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 2983.19 ms. Allocated memory was 309.3 MB in the beginning and 327.7 MB in the end (delta: 18.4 MB). Free memory was 235.8 MB in the beginning and 225.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 28.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 7 locations, 1 error locations. SAFE Result, 2.9s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 1.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 5 SDslu, 99 SDs, 0 SdLazy, 126 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 1292 SizeOfPredicates, 12 NumberOfNonLiveVariables, 479 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 14 InterpolantComputations, 6 PerfectInterpolantSequences, 26/36 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-05-27-270.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-05-27-270.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-05-27-270.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-05-27-270.csv Received shutdown request...