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/llreve-bench/smt2/rec__limit2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 22:00:23,073 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 22:00:23,075 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 22:00:23,091 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 22:00:23,091 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 22:00:23,092 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 22:00:23,096 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 22:00:23,098 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 22:00:23,099 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 22:00:23,101 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 22:00:23,102 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 22:00:23,102 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 22:00:23,103 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 22:00:23,104 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 22:00:23,104 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 22:00:23,108 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 22:00:23,110 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 22:00:23,112 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 22:00:23,113 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 22:00:23,114 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 22:00:23,115 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 22:00:23,117 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 22:00:23,118 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 22:00:23,118 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 22:00:23,119 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 22:00:23,119 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 22:00:23,120 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 22:00:23,121 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 22:00:23,122 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 22:00:23,122 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 22:00:23,123 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 22:00:23,124 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 22:00:23,124 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 22:00:23,125 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 22:00:23,125 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 22:00:23,125 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 22:00:23,139 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 22:00:23,139 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 22:00:23,139 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 22:00:23,139 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 22:00:23,140 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 22:00:23,141 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 22:00:23,141 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 22:00:23,141 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 22:00:23,141 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 22:00:23,141 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 22:00:23,142 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 22:00:23,142 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 22:00:23,142 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 22:00:23,142 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 22:00:23,143 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 22:00:23,143 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 22:00:23,143 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 22:00:23,143 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 22:00:23,143 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 22:00:23,144 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 22:00:23,144 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 22:00:23,145 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 22:00:23,146 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 22:00:23,192 INFO ]: Repository-Root is: /tmp [2018-06-24 22:00:23,205 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 22:00:23,208 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 22:00:23,210 INFO ]: Initializing SmtParser... [2018-06-24 22:00:23,210 INFO ]: SmtParser initialized [2018-06-24 22:00:23,211 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 [2018-06-24 22:00:23,212 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 22:00:23,304 INFO ]: Executing SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 unknown de.uni_freiburg.informatik.ultimate.plugins.generator.treeautomizer.parsing.HornClauseParserScript$1@41b85227 [2018-06-24 22:00:23,546 INFO ]: Succesfully executed SMT file /storage/chc-comp/llreve-bench/smt2/rec__limit2.smt2 [2018-06-24 22:00:23,550 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 22:00:23,560 INFO ]: Walking toolchain with 5 elements. [2018-06-24 22:00:23,560 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 22:00:23,560 INFO ]: Initializing ChcToBoogie... [2018-06-24 22:00:23,561 INFO ]: ChcToBoogie initialized [2018-06-24 22:00:23,565 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,619 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23 Unit [2018-06-24 22:00:23,619 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 22:00:23,619 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 22:00:23,619 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 22:00:23,619 INFO ]: Boogie Preprocessor initialized [2018-06-24 22:00:23,634 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,634 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,639 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,639 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,645 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,647 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,650 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (1/1) ... [2018-06-24 22:00:23,652 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 22:00:23,653 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 22:00:23,659 INFO ]: Initializing RCFGBuilder... [2018-06-24 22:00:23,659 INFO ]: RCFGBuilder initialized [2018-06-24 22:00:23,660 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 22:00:23,672 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 22:00:23,672 INFO ]: Found specification of procedure gotoProc [2018-06-24 22:00:23,672 INFO ]: Found implementation of procedure gotoProc [2018-06-24 22:00:23,672 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 22:00:23,672 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 22:00:23,672 INFO ]: Found implementation of procedure Ultimate.START [2018-06-24 22:00:24,051 INFO ]: Using library mode [2018-06-24 22:00:24,058 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 10:00:24 BoogieIcfgContainer [2018-06-24 22:00:24,059 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 22:00:24,059 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 22:00:24,059 INFO ]: Initializing BlockEncodingV2... [2018-06-24 22:00:24,060 INFO ]: BlockEncodingV2 initialized [2018-06-24 22:00:24,061 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 10:00:24" (1/1) ... [2018-06-24 22:00:24,078 INFO ]: Initial Icfg 28 locations, 48 edges [2018-06-24 22:00:24,079 INFO ]: Using Remove infeasible edges [2018-06-24 22:00:24,080 INFO ]: Using Maximize final states [2018-06-24 22:00:24,080 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 22:00:24,080 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 22:00:24,084 INFO ]: Using Remove sink states [2018-06-24 22:00:24,085 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 22:00:24,085 INFO ]: Using Use SBE [2018-06-24 22:00:24,097 INFO ]: SBE split 0 edges [2018-06-24 22:00:24,105 INFO ]: Removed 5 edges and 2 locations because of local infeasibility [2018-06-24 22:00:24,108 INFO ]: 0 new accepting states [2018-06-24 22:00:24,171 INFO ]: Removed 18 edges and 6 locations by large block encoding [2018-06-24 22:00:24,173 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 22:00:24,174 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 22:00:24,174 INFO ]: 0 new accepting states [2018-06-24 22:00:24,175 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 22:00:24,175 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 22:00:24,176 INFO ]: Encoded RCFG 20 locations, 37 edges [2018-06-24 22:00:24,176 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 10:00:24 BasicIcfg [2018-06-24 22:00:24,176 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 22:00:24,179 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 22:00:24,179 INFO ]: Initializing TraceAbstraction... [2018-06-24 22:00:24,183 INFO ]: TraceAbstraction initialized [2018-06-24 22:00:24,183 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 10:00:23" (1/4) ... [2018-06-24 22:00:24,184 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 10:00:24, skipping insertion in model container [2018-06-24 22:00:24,184 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 10:00:23" (2/4) ... [2018-06-24 22:00:24,184 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 10:00:24, skipping insertion in model container [2018-06-24 22:00:24,184 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 10:00:24" (3/4) ... [2018-06-24 22:00:24,184 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d31e736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 10:00:24, skipping insertion in model container [2018-06-24 22:00:24,185 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 10:00:24" (4/4) ... [2018-06-24 22:00:24,189 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 22:00:24,200 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 22:00:24,211 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 22:00:24,245 INFO ]: Using default assertion order modulation [2018-06-24 22:00:24,245 INFO ]: Interprodecural is true [2018-06-24 22:00:24,245 INFO ]: Hoare is false [2018-06-24 22:00:24,245 INFO ]: Compute interpolants for FPandBP [2018-06-24 22:00:24,245 INFO ]: Backedges is TWOTRACK [2018-06-24 22:00:24,245 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 22:00:24,245 INFO ]: Difference is false [2018-06-24 22:00:24,245 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 22:00:24,245 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 22:00:24,254 INFO ]: Start isEmpty. Operand 20 states. [2018-06-24 22:00:24,264 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 22:00:24,264 INFO ]: Found error trace [2018-06-24 22:00:24,265 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 22:00:24,265 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:24,270 INFO ]: Analyzing trace with hash 45963210, now seen corresponding path program 1 times [2018-06-24 22:00:24,272 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:24,272 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:24,303 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:24,303 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:24,303 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:24,340 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:24,388 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 22:00:24,391 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:24,391 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:24,392 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:24,402 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:24,402 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:24,404 INFO ]: Start difference. First operand 20 states. Second operand 3 states. [2018-06-24 22:00:24,656 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:24,657 INFO ]: Finished difference Result 34 states and 65 transitions. [2018-06-24 22:00:24,658 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:24,660 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 22:00:24,660 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:24,672 INFO ]: With dead ends: 34 [2018-06-24 22:00:24,672 INFO ]: Without dead ends: 34 [2018-06-24 22:00:24,674 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 22:00:24,686 INFO ]: Start minimizeSevpa. Operand 34 states. [2018-06-24 22:00:24,737 INFO ]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-06-24 22:00:24,738 INFO ]: Start removeUnreachable. Operand 34 states. [2018-06-24 22:00:24,741 INFO ]: Finished removeUnreachable. Reduced from 34 states to 34 states and 65 transitions. [2018-06-24 22:00:24,743 INFO ]: Start accepts. Automaton has 34 states and 65 transitions. Word has length 5 [2018-06-24 22:00:24,744 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:24,744 INFO ]: Abstraction has 34 states and 65 transitions. [2018-06-24 22:00:24,744 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:24,744 INFO ]: Start isEmpty. Operand 34 states and 65 transitions. [2018-06-24 22:00:24,748 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 22:00:24,748 INFO ]: Found error trace [2018-06-24 22:00:24,748 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 22:00:24,748 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:24,748 INFO ]: Analyzing trace with hash 45993962, now seen corresponding path program 1 times [2018-06-24 22:00:24,749 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:24,749 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:24,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:24,749 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:24,749 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:24,754 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:24,823 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 22:00:24,823 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:24,823 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:24,824 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:24,824 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:24,824 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:24,825 INFO ]: Start difference. First operand 34 states and 65 transitions. Second operand 3 states. [2018-06-24 22:00:25,222 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:25,222 INFO ]: Finished difference Result 48 states and 94 transitions. [2018-06-24 22:00:25,222 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:25,222 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 22:00:25,222 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:25,225 INFO ]: With dead ends: 48 [2018-06-24 22:00:25,225 INFO ]: Without dead ends: 48 [2018-06-24 22:00:25,227 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 22:00:25,227 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-24 22:00:25,237 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-06-24 22:00:25,237 INFO ]: Start removeUnreachable. Operand 48 states. [2018-06-24 22:00:25,240 INFO ]: Finished removeUnreachable. Reduced from 48 states to 48 states and 94 transitions. [2018-06-24 22:00:25,240 INFO ]: Start accepts. Automaton has 48 states and 94 transitions. Word has length 5 [2018-06-24 22:00:25,240 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:25,241 INFO ]: Abstraction has 48 states and 94 transitions. [2018-06-24 22:00:25,241 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:25,241 INFO ]: Start isEmpty. Operand 48 states and 94 transitions. [2018-06-24 22:00:25,244 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 22:00:25,244 INFO ]: Found error trace [2018-06-24 22:00:25,244 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 22:00:25,244 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:25,244 INFO ]: Analyzing trace with hash 1427967700, now seen corresponding path program 1 times [2018-06-24 22:00:25,244 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:25,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:25,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,245 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:25,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,256 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:25,285 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 22:00:25,285 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:25,285 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:25,286 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:25,286 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:25,286 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:25,286 INFO ]: Start difference. First operand 48 states and 94 transitions. Second operand 3 states. [2018-06-24 22:00:25,444 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:25,445 INFO ]: Finished difference Result 69 states and 147 transitions. [2018-06-24 22:00:25,449 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:25,449 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 22:00:25,449 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:25,454 INFO ]: With dead ends: 69 [2018-06-24 22:00:25,455 INFO ]: Without dead ends: 69 [2018-06-24 22:00:25,458 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 22:00:25,458 INFO ]: Start minimizeSevpa. Operand 69 states. [2018-06-24 22:00:25,471 INFO ]: Finished minimizeSevpa. Reduced states from 69 to 51. [2018-06-24 22:00:25,471 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-24 22:00:25,473 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2018-06-24 22:00:25,473 INFO ]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 6 [2018-06-24 22:00:25,473 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:25,473 INFO ]: Abstraction has 51 states and 100 transitions. [2018-06-24 22:00:25,473 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:25,473 INFO ]: Start isEmpty. Operand 51 states and 100 transitions. [2018-06-24 22:00:25,474 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 22:00:25,474 INFO ]: Found error trace [2018-06-24 22:00:25,475 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 22:00:25,475 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:25,475 INFO ]: Analyzing trace with hash 1429219883, now seen corresponding path program 1 times [2018-06-24 22:00:25,475 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:25,475 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:25,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,476 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:25,476 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,485 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:25,507 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 22:00:25,507 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:25,508 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:25,508 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:25,508 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:25,508 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:25,508 INFO ]: Start difference. First operand 51 states and 100 transitions. Second operand 3 states. [2018-06-24 22:00:25,533 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:25,533 INFO ]: Finished difference Result 54 states and 103 transitions. [2018-06-24 22:00:25,533 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:25,533 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 22:00:25,533 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:25,535 INFO ]: With dead ends: 54 [2018-06-24 22:00:25,535 INFO ]: Without dead ends: 54 [2018-06-24 22:00:25,535 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 22:00:25,535 INFO ]: Start minimizeSevpa. Operand 54 states. [2018-06-24 22:00:25,542 INFO ]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-06-24 22:00:25,542 INFO ]: Start removeUnreachable. Operand 54 states. [2018-06-24 22:00:25,544 INFO ]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2018-06-24 22:00:25,544 INFO ]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 6 [2018-06-24 22:00:25,544 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:25,544 INFO ]: Abstraction has 54 states and 103 transitions. [2018-06-24 22:00:25,544 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:25,544 INFO ]: Start isEmpty. Operand 54 states and 103 transitions. [2018-06-24 22:00:25,546 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 22:00:25,546 INFO ]: Found error trace [2018-06-24 22:00:25,546 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 22:00:25,546 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:25,549 INFO ]: Analyzing trace with hash -183154364, now seen corresponding path program 1 times [2018-06-24 22:00:25,549 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:25,549 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:25,549 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,550 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:25,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,568 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:25,632 INFO ]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 22:00:25,632 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:25,632 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:25,633 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:25,633 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:25,633 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:25,633 INFO ]: Start difference. First operand 54 states and 103 transitions. Second operand 3 states. [2018-06-24 22:00:25,646 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:25,646 INFO ]: Finished difference Result 57 states and 106 transitions. [2018-06-24 22:00:25,646 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:25,646 INFO ]: Start accepts. Automaton has 3 states. Word has length 12 [2018-06-24 22:00:25,646 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:25,648 INFO ]: With dead ends: 57 [2018-06-24 22:00:25,648 INFO ]: Without dead ends: 57 [2018-06-24 22:00:25,648 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 22:00:25,648 INFO ]: Start minimizeSevpa. Operand 57 states. [2018-06-24 22:00:25,654 INFO ]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-06-24 22:00:25,654 INFO ]: Start removeUnreachable. Operand 57 states. [2018-06-24 22:00:25,656 INFO ]: Finished removeUnreachable. Reduced from 57 states to 57 states and 106 transitions. [2018-06-24 22:00:25,656 INFO ]: Start accepts. Automaton has 57 states and 106 transitions. Word has length 12 [2018-06-24 22:00:25,656 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:25,656 INFO ]: Abstraction has 57 states and 106 transitions. [2018-06-24 22:00:25,656 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:25,656 INFO ]: Start isEmpty. Operand 57 states and 106 transitions. [2018-06-24 22:00:25,659 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 22:00:25,659 INFO ]: Found error trace [2018-06-24 22:00:25,659 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 22:00:25,659 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:25,659 INFO ]: Analyzing trace with hash 1515116053, now seen corresponding path program 1 times [2018-06-24 22:00:25,659 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:25,659 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:25,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,660 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:25,660 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:25,673 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:25,783 INFO ]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 22:00:25,784 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:25,784 INFO ]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-06-24 22:00:25,784 INFO ]: Interpolant automaton has 5 states [2018-06-24 22:00:25,784 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 22:00:25,784 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-24 22:00:25,784 INFO ]: Start difference. First operand 57 states and 106 transitions. Second operand 5 states. [2018-06-24 22:00:26,057 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:26,058 INFO ]: Finished difference Result 84 states and 168 transitions. [2018-06-24 22:00:26,058 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 22:00:26,058 INFO ]: Start accepts. Automaton has 5 states. Word has length 12 [2018-06-24 22:00:26,058 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:26,061 INFO ]: With dead ends: 84 [2018-06-24 22:00:26,061 INFO ]: Without dead ends: 84 [2018-06-24 22:00:26,061 INFO ]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-06-24 22:00:26,061 INFO ]: Start minimizeSevpa. Operand 84 states. [2018-06-24 22:00:26,072 INFO ]: Finished minimizeSevpa. Reduced states from 84 to 63. [2018-06-24 22:00:26,072 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-24 22:00:26,074 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 115 transitions. [2018-06-24 22:00:26,074 INFO ]: Start accepts. Automaton has 63 states and 115 transitions. Word has length 12 [2018-06-24 22:00:26,074 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:26,074 INFO ]: Abstraction has 63 states and 115 transitions. [2018-06-24 22:00:26,074 INFO ]: Interpolant automaton has 5 states. [2018-06-24 22:00:26,074 INFO ]: Start isEmpty. Operand 63 states and 115 transitions. [2018-06-24 22:00:26,076 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 22:00:26,076 INFO ]: Found error trace [2018-06-24 22:00:26,076 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 22:00:26,076 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:26,077 INFO ]: Analyzing trace with hash 1716475671, now seen corresponding path program 1 times [2018-06-24 22:00:26,077 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:26,077 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:26,077 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,077 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:26,077 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,086 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:26,100 INFO ]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 22:00:26,101 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 22:00:26,101 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 22:00:26,101 INFO ]: Interpolant automaton has 3 states [2018-06-24 22:00:26,101 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 22:00:26,101 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 22:00:26,101 INFO ]: Start difference. First operand 63 states and 115 transitions. Second operand 3 states. [2018-06-24 22:00:26,113 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:26,113 INFO ]: Finished difference Result 73 states and 141 transitions. [2018-06-24 22:00:26,121 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 22:00:26,121 INFO ]: Start accepts. Automaton has 3 states. Word has length 12 [2018-06-24 22:00:26,121 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:26,123 INFO ]: With dead ends: 73 [2018-06-24 22:00:26,123 INFO ]: Without dead ends: 70 [2018-06-24 22:00:26,123 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 22:00:26,123 INFO ]: Start minimizeSevpa. Operand 70 states. [2018-06-24 22:00:26,139 INFO ]: Finished minimizeSevpa. Reduced states from 70 to 63. [2018-06-24 22:00:26,140 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-24 22:00:26,141 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 112 transitions. [2018-06-24 22:00:26,141 INFO ]: Start accepts. Automaton has 63 states and 112 transitions. Word has length 12 [2018-06-24 22:00:26,141 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:26,141 INFO ]: Abstraction has 63 states and 112 transitions. [2018-06-24 22:00:26,141 INFO ]: Interpolant automaton has 3 states. [2018-06-24 22:00:26,141 INFO ]: Start isEmpty. Operand 63 states and 112 transitions. [2018-06-24 22:00:26,143 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-24 22:00:26,143 INFO ]: Found error trace [2018-06-24 22:00:26,143 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 22:00:26,147 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:26,147 INFO ]: Analyzing trace with hash -1383791165, now seen corresponding path program 1 times [2018-06-24 22:00:26,147 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:26,147 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:26,148 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,148 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:26,148 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,171 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:26,218 INFO ]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 22:00:26,218 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 22:00:26,218 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 22:00:26,226 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:26,257 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:26,262 INFO ]: Computing forward predicates... [2018-06-24 22:00:26,291 INFO ]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 22:00:26,327 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 22:00:26,327 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-24 22:00:26,327 INFO ]: Interpolant automaton has 5 states [2018-06-24 22:00:26,327 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-24 22:00:26,327 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-24 22:00:26,327 INFO ]: Start difference. First operand 63 states and 112 transitions. Second operand 5 states. [2018-06-24 22:00:26,496 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:26,496 INFO ]: Finished difference Result 60 states and 115 transitions. [2018-06-24 22:00:26,496 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 22:00:26,496 INFO ]: Start accepts. Automaton has 5 states. Word has length 13 [2018-06-24 22:00:26,496 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:26,497 INFO ]: With dead ends: 60 [2018-06-24 22:00:26,498 INFO ]: Without dead ends: 60 [2018-06-24 22:00:26,498 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-24 22:00:26,498 INFO ]: Start minimizeSevpa. Operand 60 states. [2018-06-24 22:00:26,505 INFO ]: Finished minimizeSevpa. Reduced states from 60 to 55. [2018-06-24 22:00:26,505 INFO ]: Start removeUnreachable. Operand 55 states. [2018-06-24 22:00:26,507 INFO ]: Finished removeUnreachable. Reduced from 55 states to 55 states and 95 transitions. [2018-06-24 22:00:26,507 INFO ]: Start accepts. Automaton has 55 states and 95 transitions. Word has length 13 [2018-06-24 22:00:26,507 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:26,507 INFO ]: Abstraction has 55 states and 95 transitions. [2018-06-24 22:00:26,507 INFO ]: Interpolant automaton has 5 states. [2018-06-24 22:00:26,507 INFO ]: Start isEmpty. Operand 55 states and 95 transitions. [2018-06-24 22:00:26,508 INFO ]: Finished isEmpty. Found accepting run of length 19 [2018-06-24 22:00:26,508 INFO ]: Found error trace [2018-06-24 22:00:26,508 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 22:00:26,508 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 22:00:26,508 INFO ]: Analyzing trace with hash 1852669061, now seen corresponding path program 1 times [2018-06-24 22:00:26,508 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 22:00:26,508 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 22:00:26,509 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,509 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:26,509 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 22:00:26,525 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:26,955 INFO ]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-24 22:00:26,955 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 22:00:26,955 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 22:00:26,964 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 22:00:26,995 INFO ]: Conjunction of SSA is unsat [2018-06-24 22:00:26,998 INFO ]: Computing forward predicates... [2018-06-24 22:00:27,253 INFO ]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-24 22:00:27,279 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 22:00:27,280 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-24 22:00:27,280 INFO ]: Interpolant automaton has 12 states [2018-06-24 22:00:27,280 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-24 22:00:27,280 INFO ]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2018-06-24 22:00:27,280 INFO ]: Start difference. First operand 55 states and 95 transitions. Second operand 12 states. [2018-06-24 22:00:27,417 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 22:00:27,417 INFO ]: Finished difference Result 32 states and 49 transitions. [2018-06-24 22:00:27,417 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 22:00:27,418 INFO ]: Start accepts. Automaton has 12 states. Word has length 18 [2018-06-24 22:00:27,418 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 22:00:27,418 INFO ]: With dead ends: 32 [2018-06-24 22:00:27,418 INFO ]: Without dead ends: 0 [2018-06-24 22:00:27,418 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-24 22:00:27,418 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 22:00:27,418 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 22:00:27,418 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 22:00:27,418 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 22:00:27,418 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2018-06-24 22:00:27,418 INFO ]: Finished accepts. word is rejected. [2018-06-24 22:00:27,418 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 22:00:27,418 INFO ]: Interpolant automaton has 12 states. [2018-06-24 22:00:27,418 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 22:00:27,418 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 22:00:27,420 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 22:00:27,421 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 10:00:27 BasicIcfg [2018-06-24 22:00:27,421 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 22:00:27,422 INFO ]: Toolchain (without parser) took 3871.37 ms. Allocated memory was 306.2 MB in the beginning and 325.1 MB in the end (delta: 18.9 MB). Free memory was 260.7 MB in the beginning and 210.2 MB in the end (delta: 50.5 MB). Peak memory consumption was 69.4 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,424 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 22:00:27,424 INFO ]: ChcToBoogie took 58.78 ms. Allocated memory is still 306.2 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,425 INFO ]: Boogie Preprocessor took 32.64 ms. Allocated memory is still 306.2 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,426 INFO ]: RCFGBuilder took 406.03 ms. Allocated memory is still 306.2 MB. Free memory was 256.7 MB in the beginning and 244.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,426 INFO ]: BlockEncodingV2 took 116.88 ms. Allocated memory is still 306.2 MB. Free memory was 244.7 MB in the beginning and 238.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,426 INFO ]: TraceAbstraction took 3242.32 ms. Allocated memory was 306.2 MB in the beginning and 325.1 MB in the end (delta: 18.9 MB). Free memory was 238.7 MB in the beginning and 210.2 MB in the end (delta: 28.5 MB). Peak memory consumption was 47.4 MB. Max. memory is 3.6 GB. [2018-06-24 22:00:27,434 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 28 locations, 48 edges - StatisticsResult: Encoded RCFG 20 locations, 37 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.2 MB. Free memory is still 270.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 58.78 ms. Allocated memory is still 306.2 MB. Free memory was 260.7 MB in the beginning and 258.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 32.64 ms. Allocated memory is still 306.2 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 406.03 ms. Allocated memory is still 306.2 MB. Free memory was 256.7 MB in the beginning and 244.7 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 116.88 ms. Allocated memory is still 306.2 MB. Free memory was 244.7 MB in the beginning and 238.7 MB in the end (delta: 6.0 MB). Peak memory consumption was 6.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3242.32 ms. Allocated memory was 306.2 MB in the beginning and 325.1 MB in the end (delta: 18.9 MB). Free memory was 238.7 MB in the beginning and 210.2 MB in the end (delta: 28.5 MB). Peak memory consumption was 47.4 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, 20 locations, 1 error locations. SAFE Result, 3.1s OverallTime, 9 OverallIterations, 2 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 366 SDtfs, 91 SDslu, 501 SDs, 0 SdLazy, 145 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 72 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred 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: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 51 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 5765 SizeOfPredicates, 10 NumberOfNonLiveVariables, 235 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 11 InterpolantComputations, 7 PerfectInterpolantSequences, 34/38 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/rec__limit2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_22-00-27-454.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_22-00-27-454.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_22-00-27-454.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/rec__limit2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_22-00-27-454.csv Received shutdown request...