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/018b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 18:07:23,145 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 18:07:23,147 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 18:07:23,159 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 18:07:23,160 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 18:07:23,161 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 18:07:23,162 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 18:07:23,165 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 18:07:23,167 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 18:07:23,167 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 18:07:23,170 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 18:07:23,170 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 18:07:23,171 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 18:07:23,171 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 18:07:23,172 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 18:07:23,175 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 18:07:23,175 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 18:07:23,177 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 18:07:23,187 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 18:07:23,188 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 18:07:23,189 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 18:07:23,190 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 18:07:23,195 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 18:07:23,195 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 18:07:23,195 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 18:07:23,196 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 18:07:23,198 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 18:07:23,199 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 18:07:23,200 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 18:07:23,201 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 18:07:23,201 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 18:07:23,201 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 18:07:23,202 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 18:07:23,202 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 18:07:23,203 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 18:07:23,203 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 18:07:23,203 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 18:07:23,216 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 18:07:23,217 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 18:07:23,217 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 18:07:23,217 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 18:07:23,218 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 18:07:23,218 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 18:07:23,219 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 18:07:23,219 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 18:07:23,219 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 18:07:23,219 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 18:07:23,219 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 18:07:23,219 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 18:07:23,220 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:07:23,220 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 18:07:23,220 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 18:07:23,220 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 18:07:23,220 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 18:07:23,221 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 18:07:23,221 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 18:07:23,221 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 18:07:23,221 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 18:07:23,222 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 18:07:23,223 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 18:07:23,270 INFO ]: Repository-Root is: /tmp [2018-06-26 18:07:23,281 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 18:07:23,284 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 18:07:23,285 INFO ]: Initializing SmtParser... [2018-06-26 18:07:23,286 INFO ]: SmtParser initialized [2018-06-26 18:07:23,286 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/018b-horn.smt2 [2018-06-26 18:07:23,287 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-26 18:07:23,375 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/018b-horn.smt2 unknown [2018-06-26 18:07:23,683 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/018b-horn.smt2 [2018-06-26 18:07:23,697 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 18:07:23,704 INFO ]: Walking toolchain with 5 elements. [2018-06-26 18:07:23,704 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 18:07:23,704 INFO ]: Initializing ChcToBoogie... [2018-06-26 18:07:23,704 INFO ]: ChcToBoogie initialized [2018-06-26 18:07:23,708 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,775 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23 Unit [2018-06-26 18:07:23,776 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 18:07:23,776 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 18:07:23,776 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 18:07:23,776 INFO ]: Boogie Preprocessor initialized [2018-06-26 18:07:23,793 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,793 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,800 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,801 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,810 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,816 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,818 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (1/1) ... [2018-06-26 18:07:23,820 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 18:07:23,821 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 18:07:23,821 INFO ]: Initializing RCFGBuilder... [2018-06-26 18:07:23,821 INFO ]: RCFGBuilder initialized [2018-06-26 18:07:23,822 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (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) [2018-06-26 18:07:23,833 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 18:07:23,833 INFO ]: Found specification of procedure gotoProc [2018-06-26 18:07:23,833 INFO ]: Found implementation of procedure gotoProc [2018-06-26 18:07:23,833 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 18:07:23,833 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 18:07:23,834 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:07:24,282 INFO ]: Using library mode [2018-06-26 18:07:24,283 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:07:24 BoogieIcfgContainer [2018-06-26 18:07:24,283 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 18:07:24,283 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 18:07:24,283 INFO ]: Initializing BlockEncodingV2... [2018-06-26 18:07:24,284 INFO ]: BlockEncodingV2 initialized [2018-06-26 18:07:24,285 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:07:24" (1/1) ... [2018-06-26 18:07:24,302 INFO ]: Initial Icfg 13 locations, 27 edges [2018-06-26 18:07:24,303 INFO ]: Using Remove infeasible edges [2018-06-26 18:07:24,303 INFO ]: Using Maximize final states [2018-06-26 18:07:24,304 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 18:07:24,304 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 18:07:24,307 INFO ]: Using Remove sink states [2018-06-26 18:07:24,307 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 18:07:24,307 INFO ]: Using Use SBE [2018-06-26 18:07:24,314 INFO ]: SBE split 0 edges [2018-06-26 18:07:24,319 INFO ]: Removed 12 edges and 4 locations because of local infeasibility [2018-06-26 18:07:24,320 INFO ]: 0 new accepting states [2018-06-26 18:07:24,365 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-26 18:07:24,368 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:07:24,370 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 18:07:24,370 INFO ]: 0 new accepting states [2018-06-26 18:07:24,371 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 18:07:24,371 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:07:24,371 INFO ]: Encoded RCFG 7 locations, 13 edges [2018-06-26 18:07:24,371 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:07:24 BasicIcfg [2018-06-26 18:07:24,371 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 18:07:24,372 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 18:07:24,372 INFO ]: Initializing TraceAbstraction... [2018-06-26 18:07:24,376 INFO ]: TraceAbstraction initialized [2018-06-26 18:07:24,377 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:07:23" (1/4) ... [2018-06-26 18:07:24,377 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6714439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 06:07:24, skipping insertion in model container [2018-06-26 18:07:24,378 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:07:23" (2/4) ... [2018-06-26 18:07:24,378 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6714439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 06:07:24, skipping insertion in model container [2018-06-26 18:07:24,378 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:07:24" (3/4) ... [2018-06-26 18:07:24,378 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6714439c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:07:24, skipping insertion in model container [2018-06-26 18:07:24,378 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:07:24" (4/4) ... [2018-06-26 18:07:24,382 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 18:07:24,393 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 18:07:24,401 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 18:07:24,441 INFO ]: Using default assertion order modulation [2018-06-26 18:07:24,442 INFO ]: Interprodecural is true [2018-06-26 18:07:24,442 INFO ]: Hoare is false [2018-06-26 18:07:24,442 INFO ]: Compute interpolants for FPandBP [2018-06-26 18:07:24,442 INFO ]: Backedges is TWOTRACK [2018-06-26 18:07:24,442 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 18:07:24,442 INFO ]: Difference is false [2018-06-26 18:07:24,442 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 18:07:24,442 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 18:07:24,456 INFO ]: Start isEmpty. Operand 7 states. [2018-06-26 18:07:24,471 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:07:24,472 INFO ]: Found error trace [2018-06-26 18:07:24,472 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:07:24,473 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:24,478 INFO ]: Analyzing trace with hash 34079811, now seen corresponding path program 1 times [2018-06-26 18:07:24,479 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:24,479 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:24,516 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:24,516 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:24,516 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:24,562 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:24,638 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:24,639 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:07:24,640 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:07:24,641 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:07:24,652 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:07:24,652 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:24,654 INFO ]: Start difference. First operand 7 states. Second operand 3 states. [2018-06-26 18:07:24,749 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:24,749 INFO ]: Finished difference Result 8 states and 16 transitions. [2018-06-26 18:07:24,749 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:07:24,750 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:07:24,750 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:24,757 INFO ]: With dead ends: 8 [2018-06-26 18:07:24,758 INFO ]: Without dead ends: 8 [2018-06-26 18:07:24,759 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:24,773 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 18:07:24,792 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-06-26 18:07:24,793 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 18:07:24,797 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 16 transitions. [2018-06-26 18:07:24,803 INFO ]: Start accepts. Automaton has 8 states and 16 transitions. Word has length 5 [2018-06-26 18:07:24,803 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:24,803 INFO ]: Abstraction has 8 states and 16 transitions. [2018-06-26 18:07:24,803 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:07:24,803 INFO ]: Start isEmpty. Operand 8 states and 16 transitions. [2018-06-26 18:07:24,804 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:07:24,804 INFO ]: Found error trace [2018-06-26 18:07:24,804 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:07:24,804 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:24,804 INFO ]: Analyzing trace with hash 34110563, now seen corresponding path program 1 times [2018-06-26 18:07:24,804 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:24,804 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:24,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:24,805 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:24,805 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:24,823 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:24,909 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:24,909 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:07:24,909 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:07:24,910 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:07:24,910 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:07:24,910 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:24,911 INFO ]: Start difference. First operand 8 states and 16 transitions. Second operand 3 states. [2018-06-26 18:07:25,038 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:25,038 INFO ]: Finished difference Result 9 states and 19 transitions. [2018-06-26 18:07:25,039 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:07:25,039 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:07:25,039 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:25,040 INFO ]: With dead ends: 9 [2018-06-26 18:07:25,040 INFO ]: Without dead ends: 9 [2018-06-26 18:07:25,040 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:25,040 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 18:07:25,042 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-26 18:07:25,042 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:07:25,042 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2018-06-26 18:07:25,042 INFO ]: Start accepts. Automaton has 9 states and 19 transitions. Word has length 5 [2018-06-26 18:07:25,042 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:25,042 INFO ]: Abstraction has 9 states and 19 transitions. [2018-06-26 18:07:25,042 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:07:25,042 INFO ]: Start isEmpty. Operand 9 states and 19 transitions. [2018-06-26 18:07:25,042 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:07:25,042 INFO ]: Found error trace [2018-06-26 18:07:25,043 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:07:25,043 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:25,043 INFO ]: Analyzing trace with hash 1055970693, now seen corresponding path program 1 times [2018-06-26 18:07:25,043 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:25,043 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:25,044 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:25,044 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:25,044 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:25,078 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:25,322 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:25,322 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:07:25,322 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:07:25,330 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:25,373 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:25,381 INFO ]: Computing forward predicates... [2018-06-26 18:07:25,691 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:25,724 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:07:25,724 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-26 18:07:25,724 INFO ]: Interpolant automaton has 6 states [2018-06-26 18:07:25,725 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 18:07:25,725 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-26 18:07:25,725 INFO ]: Start difference. First operand 9 states and 19 transitions. Second operand 6 states. [2018-06-26 18:07:26,060 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:26,060 INFO ]: Finished difference Result 12 states and 26 transitions. [2018-06-26 18:07:26,060 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 18:07:26,060 INFO ]: Start accepts. Automaton has 6 states. Word has length 6 [2018-06-26 18:07:26,060 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:26,061 INFO ]: With dead ends: 12 [2018-06-26 18:07:26,061 INFO ]: Without dead ends: 12 [2018-06-26 18:07:26,061 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-26 18:07:26,061 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 18:07:26,063 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-26 18:07:26,063 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-26 18:07:26,063 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 26 transitions. [2018-06-26 18:07:26,064 INFO ]: Start accepts. Automaton has 12 states and 26 transitions. Word has length 6 [2018-06-26 18:07:26,064 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:26,064 INFO ]: Abstraction has 12 states and 26 transitions. [2018-06-26 18:07:26,064 INFO ]: Interpolant automaton has 6 states. [2018-06-26 18:07:26,064 INFO ]: Start isEmpty. Operand 12 states and 26 transitions. [2018-06-26 18:07:26,064 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:07:26,064 INFO ]: Found error trace [2018-06-26 18:07:26,064 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:07:26,064 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:26,064 INFO ]: Analyzing trace with hash 1056000484, now seen corresponding path program 1 times [2018-06-26 18:07:26,064 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:26,064 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:26,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,065 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,065 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,099 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,233 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,233 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:07:26,234 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:07:26,241 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,276 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,278 INFO ]: Computing forward predicates... [2018-06-26 18:07:26,290 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,310 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:07:26,310 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-26 18:07:26,311 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:07:26,311 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:07:26,311 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:07:26,311 INFO ]: Start difference. First operand 12 states and 26 transitions. Second operand 4 states. [2018-06-26 18:07:26,384 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:26,384 INFO ]: Finished difference Result 17 states and 37 transitions. [2018-06-26 18:07:26,384 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:07:26,384 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 18:07:26,384 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:26,386 INFO ]: With dead ends: 17 [2018-06-26 18:07:26,386 INFO ]: Without dead ends: 17 [2018-06-26 18:07:26,386 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 [2018-06-26 18:07:26,386 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-26 18:07:26,389 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 16. [2018-06-26 18:07:26,389 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-26 18:07:26,390 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 36 transitions. [2018-06-26 18:07:26,390 INFO ]: Start accepts. Automaton has 16 states and 36 transitions. Word has length 6 [2018-06-26 18:07:26,390 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:26,390 INFO ]: Abstraction has 16 states and 36 transitions. [2018-06-26 18:07:26,390 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:07:26,390 INFO ]: Start isEmpty. Operand 16 states and 36 transitions. [2018-06-26 18:07:26,391 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:07:26,391 INFO ]: Found error trace [2018-06-26 18:07:26,391 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:07:26,391 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:26,391 INFO ]: Analyzing trace with hash 1057103712, now seen corresponding path program 1 times [2018-06-26 18:07:26,391 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:26,391 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:26,392 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,392 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,392 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,404 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,497 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,497 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:07:26,497 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:07:26,507 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,543 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,545 INFO ]: Computing forward predicates... [2018-06-26 18:07:26,550 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,571 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:07:26,571 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-26 18:07:26,571 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:07:26,571 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:07:26,571 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:07:26,571 INFO ]: Start difference. First operand 16 states and 36 transitions. Second operand 4 states. [2018-06-26 18:07:26,657 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:26,657 INFO ]: Finished difference Result 20 states and 47 transitions. [2018-06-26 18:07:26,657 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:07:26,657 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 18:07:26,658 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:26,658 INFO ]: With dead ends: 20 [2018-06-26 18:07:26,658 INFO ]: Without dead ends: 20 [2018-06-26 18:07:26,658 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 [2018-06-26 18:07:26,658 INFO ]: Start minimizeSevpa. Operand 20 states. [2018-06-26 18:07:26,661 INFO ]: Finished minimizeSevpa. Reduced states from 20 to 19. [2018-06-26 18:07:26,661 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-26 18:07:26,662 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 46 transitions. [2018-06-26 18:07:26,662 INFO ]: Start accepts. Automaton has 19 states and 46 transitions. Word has length 6 [2018-06-26 18:07:26,662 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:26,662 INFO ]: Abstraction has 19 states and 46 transitions. [2018-06-26 18:07:26,662 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:07:26,662 INFO ]: Start isEmpty. Operand 19 states and 46 transitions. [2018-06-26 18:07:26,662 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:07:26,662 INFO ]: Found error trace [2018-06-26 18:07:26,662 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:07:26,663 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:26,663 INFO ]: Analyzing trace with hash 1057133503, now seen corresponding path program 1 times [2018-06-26 18:07:26,663 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:26,663 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:26,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,663 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,682 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,720 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,720 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:07:26,720 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:07:26,720 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:07:26,720 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:07:26,720 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:26,721 INFO ]: Start difference. First operand 19 states and 46 transitions. Second operand 3 states. [2018-06-26 18:07:26,736 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:26,736 INFO ]: Finished difference Result 22 states and 49 transitions. [2018-06-26 18:07:26,736 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:07:26,736 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-26 18:07:26,737 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:26,737 INFO ]: With dead ends: 22 [2018-06-26 18:07:26,737 INFO ]: Without dead ends: 17 [2018-06-26 18:07:26,737 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:26,737 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-26 18:07:26,739 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-26 18:07:26,739 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-26 18:07:26,740 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 33 transitions. [2018-06-26 18:07:26,740 INFO ]: Start accepts. Automaton has 17 states and 33 transitions. Word has length 6 [2018-06-26 18:07:26,740 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:26,740 INFO ]: Abstraction has 17 states and 33 transitions. [2018-06-26 18:07:26,740 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:07:26,740 INFO ]: Start isEmpty. Operand 17 states and 33 transitions. [2018-06-26 18:07:26,740 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:07:26,740 INFO ]: Found error trace [2018-06-26 18:07:26,741 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 18:07:26,741 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:26,741 INFO ]: Analyzing trace with hash -1624197021, now seen corresponding path program 2 times [2018-06-26 18:07:26,741 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:26,741 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:26,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,741 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:07:26,741 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:26,754 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:26,966 INFO ]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:26,966 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:07:26,966 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) [2018-06-26 18:07:26,981 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:07:27,025 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 18:07:27,026 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:27,029 INFO ]: Computing forward predicates... [2018-06-26 18:07:27,192 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:27,212 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:07:27,213 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2018-06-26 18:07:27,213 INFO ]: Interpolant automaton has 7 states [2018-06-26 18:07:27,213 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-26 18:07:27,213 INFO ]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2018-06-26 18:07:27,213 INFO ]: Start difference. First operand 17 states and 33 transitions. Second operand 7 states. [2018-06-26 18:07:27,401 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:27,401 INFO ]: Finished difference Result 31 states and 64 transitions. [2018-06-26 18:07:27,402 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-26 18:07:27,402 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-26 18:07:27,402 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:27,402 INFO ]: With dead ends: 31 [2018-06-26 18:07:27,403 INFO ]: Without dead ends: 18 [2018-06-26 18:07:27,403 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2018-06-26 18:07:27,403 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-26 18:07:27,405 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 13. [2018-06-26 18:07:27,405 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-26 18:07:27,405 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 20 transitions. [2018-06-26 18:07:27,405 INFO ]: Start accepts. Automaton has 13 states and 20 transitions. Word has length 7 [2018-06-26 18:07:27,405 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:27,405 INFO ]: Abstraction has 13 states and 20 transitions. [2018-06-26 18:07:27,405 INFO ]: Interpolant automaton has 7 states. [2018-06-26 18:07:27,405 INFO ]: Start isEmpty. Operand 13 states and 20 transitions. [2018-06-26 18:07:27,405 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:07:27,406 INFO ]: Found error trace [2018-06-26 18:07:27,406 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 18:07:27,406 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:27,406 INFO ]: Analyzing trace with hash -1589847037, now seen corresponding path program 2 times [2018-06-26 18:07:27,406 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:27,406 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:27,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:27,406 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:07:27,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:27,417 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:27,456 INFO ]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:07:27,456 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:07:27,456 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-26 18:07:27,456 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:07:27,456 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:07:27,456 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:07:27,456 INFO ]: Start difference. First operand 13 states and 20 transitions. Second operand 4 states. [2018-06-26 18:07:27,461 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:27,461 INFO ]: Finished difference Result 13 states and 19 transitions. [2018-06-26 18:07:27,461 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:07:27,461 INFO ]: Start accepts. Automaton has 4 states. Word has length 7 [2018-06-26 18:07:27,461 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:27,461 INFO ]: With dead ends: 13 [2018-06-26 18:07:27,462 INFO ]: Without dead ends: 10 [2018-06-26 18:07:27,462 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 [2018-06-26 18:07:27,462 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 18:07:27,463 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-26 18:07:27,463 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 18:07:27,463 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 15 transitions. [2018-06-26 18:07:27,463 INFO ]: Start accepts. Automaton has 10 states and 15 transitions. Word has length 7 [2018-06-26 18:07:27,463 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:27,463 INFO ]: Abstraction has 10 states and 15 transitions. [2018-06-26 18:07:27,463 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:07:27,463 INFO ]: Start isEmpty. Operand 10 states and 15 transitions. [2018-06-26 18:07:27,463 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-26 18:07:27,464 INFO ]: Found error trace [2018-06-26 18:07:27,464 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-26 18:07:27,464 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:07:27,464 INFO ]: Analyzing trace with hash 695041505, now seen corresponding path program 1 times [2018-06-26 18:07:27,464 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:07:27,464 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:07:27,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:27,464 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:07:27,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:07:27,497 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:07:27,534 INFO ]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:07:27,535 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:07:27,535 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:07:27,535 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:07:27,535 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:07:27,535 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:27,535 INFO ]: Start difference. First operand 10 states and 15 transitions. Second operand 3 states. [2018-06-26 18:07:27,541 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:07:27,541 INFO ]: Finished difference Result 7 states and 12 transitions. [2018-06-26 18:07:27,541 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:07:27,541 INFO ]: Start accepts. Automaton has 3 states. Word has length 9 [2018-06-26 18:07:27,542 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:07:27,542 INFO ]: With dead ends: 7 [2018-06-26 18:07:27,542 INFO ]: Without dead ends: 0 [2018-06-26 18:07:27,542 INFO ]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:07:27,542 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 18:07:27,542 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 18:07:27,542 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 18:07:27,542 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 18:07:27,542 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-26 18:07:27,542 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:07:27,542 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 18:07:27,542 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:07:27,542 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 18:07:27,542 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 18:07:27,544 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 18:07:27,545 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:07:27 BasicIcfg [2018-06-26 18:07:27,545 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 18:07:27,546 INFO ]: Toolchain (without parser) took 3848.29 ms. Allocated memory was 302.5 MB in the beginning and 325.1 MB in the end (delta: 22.5 MB). Free memory was 252.9 MB in the beginning and 230.1 MB in the end (delta: 22.8 MB). Peak memory consumption was 45.3 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,548 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 302.5 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:07:27,548 INFO ]: ChcToBoogie took 71.90 ms. Allocated memory is still 302.5 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,549 INFO ]: Boogie Preprocessor took 44.26 ms. Allocated memory is still 302.5 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,549 INFO ]: RCFGBuilder took 461.99 ms. Allocated memory is still 302.5 MB. Free memory was 248.9 MB in the beginning and 231.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,550 INFO ]: BlockEncodingV2 took 87.92 ms. Allocated memory is still 302.5 MB. Free memory was 231.0 MB in the beginning and 227.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,550 INFO ]: TraceAbstraction took 3172.90 ms. Allocated memory was 302.5 MB in the beginning and 325.1 MB in the end (delta: 22.5 MB). Free memory was 227.0 MB in the beginning and 230.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 19.4 MB. Max. memory is 3.6 GB. [2018-06-26 18:07:27,554 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 0.06 ms. Allocated memory is still 302.5 MB. Free memory is still 267.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 71.90 ms. Allocated memory is still 302.5 MB. Free memory was 252.9 MB in the beginning and 250.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 44.26 ms. Allocated memory is still 302.5 MB. Free memory was 250.9 MB in the beginning and 248.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 461.99 ms. Allocated memory is still 302.5 MB. Free memory was 248.9 MB in the beginning and 231.0 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 87.92 ms. Allocated memory is still 302.5 MB. Free memory was 231.0 MB in the beginning and 227.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3172.90 ms. Allocated memory was 302.5 MB in the beginning and 325.1 MB in the end (delta: 22.5 MB). Free memory was 227.0 MB in the beginning and 230.1 MB in the end (delta: -3.1 MB). Peak memory consumption was 19.4 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, 3.1s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 85 SDtfs, 4 SDslu, 112 SDs, 0 SdLazy, 110 SolverSat, 38 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=5, 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, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 69 ConstructedInterpolants, 0 QuantifiedInterpolants, 1169 SizeOfPredicates, 12 NumberOfNonLiveVariables, 394 ConjunctsInSsa, 58 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 19/26 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/018b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_18-07-27-565.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_18-07-27-565.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_18-07-27-565.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/018b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_18-07-27-565.csv Received shutdown request...