java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:18:08,421 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:18:08,423 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:18:08,435 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:18:08,436 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:18:08,437 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:18:08,438 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:18:08,446 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:18:08,448 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:18:08,448 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:18:08,451 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:18:08,451 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:18:08,452 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:18:08,453 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:18:08,456 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:18:08,457 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:18:08,458 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:18:08,459 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:18:08,461 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:18:08,462 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:18:08,463 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:18:08,464 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:18:08,467 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:18:08,467 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:18:08,467 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:18:08,468 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:18:08,469 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:18:08,469 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:18:08,470 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:18:08,471 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:18:08,471 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:18:08,472 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:18:08,472 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:18:08,472 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:18:08,473 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:18:08,474 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:18:08,474 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:18:08,488 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:18:08,488 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:18:08,488 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:18:08,489 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:18:08,489 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:18:08,490 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:18:08,490 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:18:08,490 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:18:08,490 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:18:08,491 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:18:08,491 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:18:08,491 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:18:08,491 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:18:08,491 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:18:08,491 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:18:08,492 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:18:08,492 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:18:08,492 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:18:08,492 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:18:08,492 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:18:08,493 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:18:08,494 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:18:08,494 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:18:08,537 INFO ]: Repository-Root is: /tmp [2018-06-26 21:18:08,550 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:18:08,555 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:18:08,557 INFO ]: Initializing SmtParser... [2018-06-26 21:18:08,557 INFO ]: SmtParser initialized [2018-06-26 21:18:08,558 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-26 21:18:08,559 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-26 21:18:08,647 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 unknown [2018-06-26 21:18:09,050 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/bk-nat.c.smt2 [2018-06-26 21:18:09,054 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:18:09,059 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:18:09,060 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:18:09,060 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:18:09,060 INFO ]: ChcToBoogie initialized [2018-06-26 21:18:09,063 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,115 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09 Unit [2018-06-26 21:18:09,115 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:18:09,116 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:18:09,116 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:18:09,116 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:18:09,140 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,140 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,149 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,149 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,167 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,169 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,171 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,174 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:18:09,175 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:18:09,175 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:18:09,175 INFO ]: RCFGBuilder initialized [2018-06-26 21:18:09,176 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:18:09,188 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:18:09,189 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:18:09,189 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:18:09,189 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:18:09,189 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:18:09,189 INFO ]: Found implementation of procedure Ultimate.START [2018-06-26 21:18:09,533 INFO ]: Using library mode [2018-06-26 21:18:09,534 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:09 BoogieIcfgContainer [2018-06-26 21:18:09,534 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:18:09,534 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:18:09,534 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:18:09,535 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:18:09,536 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:09" (1/1) ... [2018-06-26 21:18:09,564 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:18:09,565 INFO ]: Using Remove infeasible edges [2018-06-26 21:18:09,565 INFO ]: Using Maximize final states [2018-06-26 21:18:09,566 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:18:09,566 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:18:09,570 INFO ]: Using Remove sink states [2018-06-26 21:18:09,571 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:18:09,571 INFO ]: Using Use SBE [2018-06-26 21:18:09,578 WARN ]: expecting exponential blowup for input size 7 [2018-06-26 21:18:09,618 WARN ]: aborting because of expected exponential blowup for input size 70 [2018-06-26 21:18:09,634 WARN ]: aborting because of expected exponential blowup for input size 70 [2018-06-26 21:18:09,634 INFO ]: SBE split 1 edges [2018-06-26 21:18:09,641 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:18:09,644 INFO ]: 0 new accepting states [2018-06-26 21:18:09,770 INFO ]: Removed 8 edges and 2 locations by large block encoding [2018-06-26 21:18:09,771 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:18:09,773 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:18:09,773 INFO ]: 0 new accepting states [2018-06-26 21:18:09,773 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:18:09,773 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:18:09,773 INFO ]: Encoded RCFG 6 locations, 10 edges [2018-06-26 21:18:09,774 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:18:09 BasicIcfg [2018-06-26 21:18:09,774 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:18:09,775 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:18:09,775 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:18:09,779 INFO ]: TraceAbstraction initialized [2018-06-26 21:18:09,780 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:18:09" (1/4) ... [2018-06-26 21:18:09,780 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9c20dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:18:09, skipping insertion in model container [2018-06-26 21:18:09,780 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:18:09" (2/4) ... [2018-06-26 21:18:09,781 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9c20dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:18:09, skipping insertion in model container [2018-06-26 21:18:09,781 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:18:09" (3/4) ... [2018-06-26 21:18:09,781 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e9c20dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:18:09, skipping insertion in model container [2018-06-26 21:18:09,781 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:18:09" (4/4) ... [2018-06-26 21:18:09,782 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:18:09,794 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:18:09,800 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:18:09,843 INFO ]: Using default assertion order modulation [2018-06-26 21:18:09,843 INFO ]: Interprodecural is true [2018-06-26 21:18:09,843 INFO ]: Hoare is false [2018-06-26 21:18:09,844 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:18:09,844 INFO ]: Backedges is TWOTRACK [2018-06-26 21:18:09,844 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:18:09,844 INFO ]: Difference is false [2018-06-26 21:18:09,844 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:18:09,844 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:18:09,859 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:18:09,874 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:18:09,874 INFO ]: Found error trace [2018-06-26 21:18:09,875 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:18:09,875 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:09,881 INFO ]: Analyzing trace with hash 35589957, now seen corresponding path program 1 times [2018-06-26 21:18:09,883 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:09,883 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:09,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:09,925 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:09,925 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:09,963 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:10,021 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:10,023 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:18:10,023 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:18:10,025 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:18:10,035 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:18:10,035 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:10,038 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:18:10,118 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:10,118 INFO ]: Finished difference Result 7 states and 11 transitions. [2018-06-26 21:18:10,118 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:18:10,119 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:18:10,120 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:10,128 INFO ]: With dead ends: 7 [2018-06-26 21:18:10,128 INFO ]: Without dead ends: 7 [2018-06-26 21:18:10,130 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:10,145 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:18:10,156 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:18:10,157 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:18:10,157 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 11 transitions. [2018-06-26 21:18:10,158 INFO ]: Start accepts. Automaton has 7 states and 11 transitions. Word has length 5 [2018-06-26 21:18:10,159 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:10,159 INFO ]: Abstraction has 7 states and 11 transitions. [2018-06-26 21:18:10,159 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:18:10,159 INFO ]: Start isEmpty. Operand 7 states and 11 transitions. [2018-06-26 21:18:10,159 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:18:10,159 INFO ]: Found error trace [2018-06-26 21:18:10,159 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:18:10,159 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:10,160 INFO ]: Analyzing trace with hash 35649539, now seen corresponding path program 1 times [2018-06-26 21:18:10,160 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:10,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:10,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:10,161 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:10,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:10,166 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:10,197 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:10,197 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:18:10,197 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:18:10,198 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:18:10,199 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:18:10,199 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:10,199 INFO ]: Start difference. First operand 7 states and 11 transitions. Second operand 3 states. [2018-06-26 21:18:10,272 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:10,272 INFO ]: Finished difference Result 8 states and 12 transitions. [2018-06-26 21:18:10,273 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:18:10,273 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:18:10,273 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:10,274 INFO ]: With dead ends: 8 [2018-06-26 21:18:10,274 INFO ]: Without dead ends: 8 [2018-06-26 21:18:10,274 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:18:10,275 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 21:18:10,275 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-26 21:18:10,276 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:18:10,276 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 11 transitions. [2018-06-26 21:18:10,276 INFO ]: Start accepts. Automaton has 7 states and 11 transitions. Word has length 5 [2018-06-26 21:18:10,276 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:10,276 INFO ]: Abstraction has 7 states and 11 transitions. [2018-06-26 21:18:10,276 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:18:10,276 INFO ]: Start isEmpty. Operand 7 states and 11 transitions. [2018-06-26 21:18:10,276 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:18:10,276 INFO ]: Found error trace [2018-06-26 21:18:10,276 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:18:10,276 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:10,277 INFO ]: Analyzing trace with hash 1102763159, now seen corresponding path program 1 times [2018-06-26 21:18:10,277 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:10,277 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:10,277 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:10,277 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:10,277 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:10,367 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:10,579 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:10,579 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:10,579 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:18:10,586 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:10,647 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:10,655 INFO ]: Computing forward predicates... [2018-06-26 21:18:11,430 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:11,450 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:18:11,450 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-26 21:18:11,450 INFO ]: Interpolant automaton has 4 states [2018-06-26 21:18:11,450 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 21:18:11,450 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 21:18:11,450 INFO ]: Start difference. First operand 7 states and 11 transitions. Second operand 4 states. [2018-06-26 21:18:11,556 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:11,556 INFO ]: Finished difference Result 9 states and 13 transitions. [2018-06-26 21:18:11,557 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 21:18:11,557 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 21:18:11,557 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:11,557 INFO ]: With dead ends: 9 [2018-06-26 21:18:11,557 INFO ]: Without dead ends: 9 [2018-06-26 21:18:11,557 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 21:18:11,558 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:18:11,558 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-26 21:18:11,558 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:18:11,559 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 12 transitions. [2018-06-26 21:18:11,559 INFO ]: Start accepts. Automaton has 8 states and 12 transitions. Word has length 6 [2018-06-26 21:18:11,559 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:11,559 INFO ]: Abstraction has 8 states and 12 transitions. [2018-06-26 21:18:11,559 INFO ]: Interpolant automaton has 4 states. [2018-06-26 21:18:11,559 INFO ]: Start isEmpty. Operand 8 states and 12 transitions. [2018-06-26 21:18:11,559 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:18:11,559 INFO ]: Found error trace [2018-06-26 21:18:11,559 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:18:11,559 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:11,559 INFO ]: Analyzing trace with hash 1104610201, now seen corresponding path program 1 times [2018-06-26 21:18:11,559 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:11,560 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:11,560 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:11,560 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:11,560 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:11,597 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:11,743 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:11,743 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:11,743 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:18:11,750 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:11,800 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:11,802 INFO ]: Computing forward predicates... [2018-06-26 21:18:12,640 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:12,673 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:18:12,673 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:18:12,673 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:18:12,673 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:18:12,673 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:18:12,673 INFO ]: Start difference. First operand 8 states and 12 transitions. Second operand 5 states. [2018-06-26 21:18:12,757 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:12,757 INFO ]: Finished difference Result 11 states and 15 transitions. [2018-06-26 21:18:12,758 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 21:18:12,758 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:18:12,758 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:12,758 INFO ]: With dead ends: 11 [2018-06-26 21:18:12,758 INFO ]: Without dead ends: 11 [2018-06-26 21:18:12,758 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:18:12,759 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-26 21:18:12,760 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-06-26 21:18:12,760 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:18:12,760 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-26 21:18:12,760 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 6 [2018-06-26 21:18:12,760 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:12,760 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-26 21:18:12,760 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:18:12,760 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-26 21:18:12,760 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:18:12,760 INFO ]: Found error trace [2018-06-26 21:18:12,760 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:18:12,761 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:12,761 INFO ]: Analyzing trace with hash -174605947, now seen corresponding path program 2 times [2018-06-26 21:18:12,761 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:12,761 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:12,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:12,762 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:18:12,762 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:12,795 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:12,981 WARN ]: Spent 109.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-26 21:18:12,990 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:12,990 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:12,991 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:18:13,003 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:18:13,078 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:18:13,078 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:13,081 INFO ]: Computing forward predicates... [2018-06-26 21:18:32,860 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:32,878 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:18:32,878 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:18:32,879 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:18:32,879 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:18:32,879 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:18:32,879 INFO ]: Start difference. First operand 9 states and 13 transitions. Second operand 6 states. [2018-06-26 21:18:33,008 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:18:33,008 INFO ]: Finished difference Result 13 states and 17 transitions. [2018-06-26 21:18:33,009 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:18:33,009 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:18:33,009 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:18:33,009 INFO ]: With dead ends: 13 [2018-06-26 21:18:33,009 INFO ]: Without dead ends: 13 [2018-06-26 21:18:33,009 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:18:33,009 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:18:33,010 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-26 21:18:33,010 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:18:33,011 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2018-06-26 21:18:33,011 INFO ]: Start accepts. Automaton has 9 states and 13 transitions. Word has length 7 [2018-06-26 21:18:33,011 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:18:33,011 INFO ]: Abstraction has 9 states and 13 transitions. [2018-06-26 21:18:33,011 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:18:33,011 INFO ]: Start isEmpty. Operand 9 states and 13 transitions. [2018-06-26 21:18:33,011 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:18:33,011 INFO ]: Found error trace [2018-06-26 21:18:33,011 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:18:33,011 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:18:33,011 INFO ]: Analyzing trace with hash -1118342569, now seen corresponding path program 3 times [2018-06-26 21:18:33,012 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:18:33,012 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:18:33,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:33,012 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:18:33,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:18:33,059 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:33,327 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:18:33,327 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:18:33,327 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:18:33,333 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 21:18:33,429 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 21:18:33,429 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:18:33,433 INFO ]: Computing forward predicates... [2018-06-26 21:18:36,244 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:18:36,278 WARN ]: expecting exponential blowup for input size 8 Received shutdown request... [2018-06-26 21:19:19,455 INFO ]: Timeout while computing interpolants [2018-06-26 21:19:19,655 WARN ]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:19:19,655 WARN ]: Verification canceled [2018-06-26 21:19:19,657 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:19:19,658 WARN ]: Timeout [2018-06-26 21:19:19,658 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:19:19 BasicIcfg [2018-06-26 21:19:19,658 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:19:19,659 INFO ]: Toolchain (without parser) took 70604.54 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 251.6 MB in the beginning and 1.2 GB in the end (delta: -910.5 MB). Peak memory consumption was 304.3 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:19,660 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:19:19,660 INFO ]: ChcToBoogie took 55.84 ms. Allocated memory is still 307.2 MB. Free memory was 251.6 MB in the beginning and 247.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:19,661 INFO ]: Boogie Preprocessor took 57.78 ms. Allocated memory is still 307.2 MB. Free memory is still 247.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:19:19,661 INFO ]: RCFGBuilder took 359.03 ms. Allocated memory is still 307.2 MB. Free memory was 247.6 MB in the beginning and 231.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:19,667 INFO ]: BlockEncodingV2 took 239.56 ms. Allocated memory is still 307.2 MB. Free memory was 231.7 MB in the beginning and 223.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:19,668 INFO ]: TraceAbstraction took 69883.74 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 223.7 MB in the beginning and 1.2 GB in the end (delta: -938.4 MB). Peak memory consumption was 276.4 MB. Max. memory is 3.6 GB. [2018-06-26 21:19:19,671 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 10 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 307.2 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 55.84 ms. Allocated memory is still 307.2 MB. Free memory was 251.6 MB in the beginning and 247.6 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 57.78 ms. Allocated memory is still 307.2 MB. Free memory is still 247.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 359.03 ms. Allocated memory is still 307.2 MB. Free memory was 247.6 MB in the beginning and 231.7 MB in the end (delta: 15.9 MB). Peak memory consumption was 15.9 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 239.56 ms. Allocated memory is still 307.2 MB. Free memory was 231.7 MB in the beginning and 223.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69883.74 ms. Allocated memory was 307.2 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 223.7 MB in the beginning and 1.2 GB in the end (delta: -938.4 MB). Peak memory consumption was 276.4 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PredicateComparison was comparing new predicate (quantifier-free) to 7 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 69.8s OverallTime, 6 OverallIterations, 3 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 0 SDslu, 30 SDs, 0 SdLazy, 37 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=4, 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, 5 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 22.0s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 524 SizeOfPredicates, 18 NumberOfNonLiveVariables, 462 ConjunctsInSsa, 55 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/10 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-19-19-682.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-19-19-682.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-19-19-682.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/bk-nat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-19-19-682.csv Completed graceful shutdown