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/hopv/lia/fpice/inductive.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:12:04,887 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:12:04,889 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:12:04,900 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:12:04,901 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:12:04,901 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:12:04,903 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:12:04,905 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:12:04,906 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:12:04,907 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:12:04,908 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:12:04,908 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:12:04,909 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:12:04,910 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:12:04,911 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:12:04,912 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:12:04,914 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:12:04,916 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:12:04,918 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:12:04,919 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:12:04,920 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:12:04,923 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-24 21:12:04,923 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-24 21:12:04,923 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-24 21:12:04,924 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-24 21:12:04,926 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-24 21:12:04,926 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-24 21:12:04,927 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-24 21:12:04,928 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-24 21:12:04,929 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-24 21:12:04,929 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-24 21:12:04,930 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-24 21:12:04,930 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-24 21:12:04,931 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-24 21:12:04,932 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-24 21:12:04,933 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:12:04,947 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:12:04,947 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:12:04,948 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:12:04,948 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:12:04,949 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:12:04,949 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:12:04,950 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:12:04,950 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:12:04,950 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:12:04,950 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:12:04,951 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:12:04,951 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:12:04,951 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:12:04,951 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:12:04,952 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:12:04,952 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:12:04,952 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:12:04,952 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:12:04,953 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:12:04,953 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:12:04,953 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:12:04,955 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:12:04,955 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:12:05,008 INFO ]: Repository-Root is: /tmp [2018-06-24 21:12:05,026 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:12:05,031 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:12:05,032 INFO ]: Initializing SmtParser... [2018-06-24 21:12:05,033 INFO ]: SmtParser initialized [2018-06-24 21:12:05,033 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/fpice/inductive.smt2 [2018-06-24 21:12:05,035 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-24 21:12:05,131 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/fpice/inductive.smt2 unknown [2018-06-24 21:12:05,321 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/fpice/inductive.smt2 [2018-06-24 21:12:05,332 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:12:05,338 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:12:05,339 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:12:05,339 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:12:05,339 INFO ]: ChcToBoogie initialized [2018-06-24 21:12:05,342 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,402 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05 Unit [2018-06-24 21:12:05,402 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:12:05,403 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:12:05,403 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:12:05,403 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:12:05,427 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,427 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,432 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,432 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,435 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,439 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,440 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,442 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:12:05,443 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:12:05,443 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:12:05,443 INFO ]: RCFGBuilder initialized [2018-06-24 21:12:05,444 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-24 21:12:05,464 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:12:05,464 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:12:05,464 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:12:05,464 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:12:05,464 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:12:05,464 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:12:05,819 INFO ]: Using library mode [2018-06-24 21:12:05,820 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:05 BoogieIcfgContainer [2018-06-24 21:12:05,820 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:12:05,820 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:12:05,820 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:12:05,822 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:12:05,822 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:05" (1/1) ... [2018-06-24 21:12:05,849 INFO ]: Initial Icfg 13 locations, 19 edges [2018-06-24 21:12:05,854 INFO ]: Using Remove infeasible edges [2018-06-24 21:12:05,855 INFO ]: Using Maximize final states [2018-06-24 21:12:05,855 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:12:05,856 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:12:05,858 INFO ]: Using Remove sink states [2018-06-24 21:12:05,859 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:12:05,859 INFO ]: Using Use SBE [2018-06-24 21:12:05,877 INFO ]: SBE split 0 edges [2018-06-24 21:12:05,884 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:12:05,887 INFO ]: 0 new accepting states [2018-06-24 21:12:05,950 INFO ]: Removed 8 edges and 3 locations by large block encoding [2018-06-24 21:12:05,952 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:12:05,954 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:12:05,954 INFO ]: 0 new accepting states [2018-06-24 21:12:05,954 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:12:05,954 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:12:05,955 INFO ]: Encoded RCFG 8 locations, 13 edges [2018-06-24 21:12:05,955 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:12:05 BasicIcfg [2018-06-24 21:12:05,955 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:12:05,956 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:12:05,956 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:12:05,959 INFO ]: TraceAbstraction initialized [2018-06-24 21:12:05,959 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:12:05" (1/4) ... [2018-06-24 21:12:05,960 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5905ec46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:12:05, skipping insertion in model container [2018-06-24 21:12:05,960 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:05" (2/4) ... [2018-06-24 21:12:05,961 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5905ec46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:12:05, skipping insertion in model container [2018-06-24 21:12:05,961 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:05" (3/4) ... [2018-06-24 21:12:05,961 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5905ec46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:12:05, skipping insertion in model container [2018-06-24 21:12:05,961 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:12:05" (4/4) ... [2018-06-24 21:12:05,963 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:12:05,973 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:12:05,982 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:12:06,022 INFO ]: Using default assertion order modulation [2018-06-24 21:12:06,022 INFO ]: Interprodecural is true [2018-06-24 21:12:06,022 INFO ]: Hoare is false [2018-06-24 21:12:06,022 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:12:06,022 INFO ]: Backedges is TWOTRACK [2018-06-24 21:12:06,022 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:12:06,022 INFO ]: Difference is false [2018-06-24 21:12:06,022 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:12:06,022 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:12:06,031 INFO ]: Start isEmpty. Operand 8 states. [2018-06-24 21:12:06,043 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:12:06,043 INFO ]: Found error trace [2018-06-24 21:12:06,044 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:12:06,044 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:06,049 INFO ]: Analyzing trace with hash 32911908, now seen corresponding path program 1 times [2018-06-24 21:12:06,051 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:06,051 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:06,089 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,090 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:06,090 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,133 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:06,200 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:06,202 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:06,202 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:06,203 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:06,214 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:06,214 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,217 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-24 21:12:06,315 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:06,315 INFO ]: Finished difference Result 13 states and 23 transitions. [2018-06-24 21:12:06,315 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:06,316 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:12:06,316 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:06,324 INFO ]: With dead ends: 13 [2018-06-24 21:12:06,324 INFO ]: Without dead ends: 13 [2018-06-24 21:12:06,325 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,339 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-24 21:12:06,373 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-24 21:12:06,374 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-24 21:12:06,375 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 23 transitions. [2018-06-24 21:12:06,376 INFO ]: Start accepts. Automaton has 13 states and 23 transitions. Word has length 5 [2018-06-24 21:12:06,380 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:06,380 INFO ]: Abstraction has 13 states and 23 transitions. [2018-06-24 21:12:06,380 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:06,380 INFO ]: Start isEmpty. Operand 13 states and 23 transitions. [2018-06-24 21:12:06,381 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:12:06,381 INFO ]: Found error trace [2018-06-24 21:12:06,381 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:12:06,381 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:06,381 INFO ]: Analyzing trace with hash 32971490, now seen corresponding path program 1 times [2018-06-24 21:12:06,381 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:06,381 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:06,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:06,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,395 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:06,462 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:06,463 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:06,463 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:06,464 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:06,464 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:06,464 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,465 INFO ]: Start difference. First operand 13 states and 23 transitions. Second operand 3 states. [2018-06-24 21:12:06,653 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:06,653 INFO ]: Finished difference Result 15 states and 29 transitions. [2018-06-24 21:12:06,654 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:06,654 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:12:06,654 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:06,655 INFO ]: With dead ends: 15 [2018-06-24 21:12:06,655 INFO ]: Without dead ends: 15 [2018-06-24 21:12:06,656 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,656 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-24 21:12:06,658 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-24 21:12:06,658 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 21:12:06,661 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 29 transitions. [2018-06-24 21:12:06,661 INFO ]: Start accepts. Automaton has 15 states and 29 transitions. Word has length 5 [2018-06-24 21:12:06,661 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:06,661 INFO ]: Abstraction has 15 states and 29 transitions. [2018-06-24 21:12:06,661 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:06,661 INFO ]: Start isEmpty. Operand 15 states and 29 transitions. [2018-06-24 21:12:06,661 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-24 21:12:06,661 INFO ]: Found error trace [2018-06-24 21:12:06,662 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-24 21:12:06,662 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:06,662 INFO ]: Analyzing trace with hash 1021764571, now seen corresponding path program 1 times [2018-06-24 21:12:06,662 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:06,662 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:06,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,663 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:06,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,677 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:06,741 INFO ]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:06,741 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:06,741 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:06,742 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:06,742 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:06,742 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,742 INFO ]: Start difference. First operand 15 states and 29 transitions. Second operand 3 states. [2018-06-24 21:12:06,861 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:06,861 INFO ]: Finished difference Result 19 states and 32 transitions. [2018-06-24 21:12:06,862 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:06,863 INFO ]: Start accepts. Automaton has 3 states. Word has length 6 [2018-06-24 21:12:06,863 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:06,865 INFO ]: With dead ends: 19 [2018-06-24 21:12:06,865 INFO ]: Without dead ends: 17 [2018-06-24 21:12:06,865 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:06,866 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-24 21:12:06,873 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 15. [2018-06-24 21:12:06,873 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-24 21:12:06,873 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 25 transitions. [2018-06-24 21:12:06,873 INFO ]: Start accepts. Automaton has 15 states and 25 transitions. Word has length 6 [2018-06-24 21:12:06,874 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:06,874 INFO ]: Abstraction has 15 states and 25 transitions. [2018-06-24 21:12:06,874 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:06,874 INFO ]: Start isEmpty. Operand 15 states and 25 transitions. [2018-06-24 21:12:06,874 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-24 21:12:06,874 INFO ]: Found error trace [2018-06-24 21:12:06,874 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:06,874 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:06,874 INFO ]: Analyzing trace with hash 2018335556, now seen corresponding path program 1 times [2018-06-24 21:12:06,875 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:06,875 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:06,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,875 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:06,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:06,897 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:06,987 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:06,988 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:06,988 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 21:12:06,988 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:12:06,988 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:12:06,988 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:12:06,988 INFO ]: Start difference. First operand 15 states and 25 transitions. Second operand 4 states. [2018-06-24 21:12:07,047 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:07,047 INFO ]: Finished difference Result 19 states and 33 transitions. [2018-06-24 21:12:07,047 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:12:07,048 INFO ]: Start accepts. Automaton has 4 states. Word has length 10 [2018-06-24 21:12:07,048 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:07,048 INFO ]: With dead ends: 19 [2018-06-24 21:12:07,048 INFO ]: Without dead ends: 17 [2018-06-24 21:12:07,049 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:12:07,049 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-24 21:12:07,051 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-24 21:12:07,051 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-24 21:12:07,052 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 29 transitions. [2018-06-24 21:12:07,052 INFO ]: Start accepts. Automaton has 17 states and 29 transitions. Word has length 10 [2018-06-24 21:12:07,052 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:07,052 INFO ]: Abstraction has 17 states and 29 transitions. [2018-06-24 21:12:07,052 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:12:07,052 INFO ]: Start isEmpty. Operand 17 states and 29 transitions. [2018-06-24 21:12:07,053 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-24 21:12:07,053 INFO ]: Found error trace [2018-06-24 21:12:07,053 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:07,053 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:07,053 INFO ]: Analyzing trace with hash -1856458823, now seen corresponding path program 1 times [2018-06-24 21:12:07,053 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:07,053 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:07,054 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:07,054 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:07,056 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:07,077 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:07,272 INFO ]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:07,272 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:07,272 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) [2018-06-24 21:12:07,290 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:12:07,318 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:07,326 INFO ]: Computing forward predicates... [2018-06-24 21:12:07,388 INFO ]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:07,408 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:07,408 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2018-06-24 21:12:07,408 INFO ]: Interpolant automaton has 7 states [2018-06-24 21:12:07,408 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-24 21:12:07,409 INFO ]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-06-24 21:12:07,409 INFO ]: Start difference. First operand 17 states and 29 transitions. Second operand 7 states. [2018-06-24 21:12:07,549 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:07,549 INFO ]: Finished difference Result 23 states and 37 transitions. [2018-06-24 21:12:07,549 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:12:07,549 INFO ]: Start accepts. Automaton has 7 states. Word has length 11 [2018-06-24 21:12:07,550 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:07,550 INFO ]: With dead ends: 23 [2018-06-24 21:12:07,550 INFO ]: Without dead ends: 18 [2018-06-24 21:12:07,550 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:12:07,550 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-24 21:12:07,552 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-06-24 21:12:07,553 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-24 21:12:07,553 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 32 transitions. [2018-06-24 21:12:07,553 INFO ]: Start accepts. Automaton has 18 states and 32 transitions. Word has length 11 [2018-06-24 21:12:07,553 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:07,553 INFO ]: Abstraction has 18 states and 32 transitions. [2018-06-24 21:12:07,554 INFO ]: Interpolant automaton has 7 states. [2018-06-24 21:12:07,554 INFO ]: Start isEmpty. Operand 18 states and 32 transitions. [2018-06-24 21:12:07,554 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 21:12:07,554 INFO ]: Found error trace [2018-06-24 21:12:07,554 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:07,554 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:07,554 INFO ]: Analyzing trace with hash -756521398, now seen corresponding path program 2 times [2018-06-24 21:12:07,554 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:07,555 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:07,558 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:07,558 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:07,558 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:07,577 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:07,742 INFO ]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 21:12:07,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:07,742 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:12:07,751 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:12:07,803 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:12:07,803 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:07,805 INFO ]: Computing forward predicates... [2018-06-24 21:12:08,170 INFO ]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 21:12:08,189 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:08,189 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2018-06-24 21:12:08,189 INFO ]: Interpolant automaton has 9 states [2018-06-24 21:12:08,189 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-24 21:12:08,189 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-24 21:12:08,189 INFO ]: Start difference. First operand 18 states and 32 transitions. Second operand 9 states. [2018-06-24 21:12:08,996 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:08,996 INFO ]: Finished difference Result 34 states and 64 transitions. [2018-06-24 21:12:08,996 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-24 21:12:08,996 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-24 21:12:08,996 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:08,997 INFO ]: With dead ends: 34 [2018-06-24 21:12:08,997 INFO ]: Without dead ends: 21 [2018-06-24 21:12:08,998 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2018-06-24 21:12:08,998 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-24 21:12:09,001 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 18. [2018-06-24 21:12:09,001 INFO ]: Start removeUnreachable. Operand 18 states. [2018-06-24 21:12:09,002 INFO ]: Finished removeUnreachable. Reduced from 18 states to 18 states and 29 transitions. [2018-06-24 21:12:09,002 INFO ]: Start accepts. Automaton has 18 states and 29 transitions. Word has length 12 [2018-06-24 21:12:09,002 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:09,002 INFO ]: Abstraction has 18 states and 29 transitions. [2018-06-24 21:12:09,002 INFO ]: Interpolant automaton has 9 states. [2018-06-24 21:12:09,002 INFO ]: Start isEmpty. Operand 18 states and 29 transitions. [2018-06-24 21:12:09,002 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 21:12:09,002 INFO ]: Found error trace [2018-06-24 21:12:09,002 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:09,003 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:09,003 INFO ]: Analyzing trace with hash -1565868024, now seen corresponding path program 1 times [2018-06-24 21:12:09,003 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:09,003 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:09,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:09,004 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:12:09,004 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:09,018 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:09,063 INFO ]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 21:12:09,063 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:09,063 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-24 21:12:09,069 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:09,087 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:09,088 INFO ]: Computing forward predicates... [2018-06-24 21:12:09,135 INFO ]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 21:12:09,153 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:09,153 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-24 21:12:09,153 INFO ]: Interpolant automaton has 8 states [2018-06-24 21:12:09,154 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-24 21:12:09,154 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:12:09,154 INFO ]: Start difference. First operand 18 states and 29 transitions. Second operand 8 states. [2018-06-24 21:12:09,392 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:09,392 INFO ]: Finished difference Result 24 states and 37 transitions. [2018-06-24 21:12:09,392 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-24 21:12:09,392 INFO ]: Start accepts. Automaton has 8 states. Word has length 12 [2018-06-24 21:12:09,393 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:09,393 INFO ]: With dead ends: 24 [2018-06-24 21:12:09,393 INFO ]: Without dead ends: 22 [2018-06-24 21:12:09,393 INFO ]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-24 21:12:09,394 INFO ]: Start minimizeSevpa. Operand 22 states. [2018-06-24 21:12:09,396 INFO ]: Finished minimizeSevpa. Reduced states from 22 to 19. [2018-06-24 21:12:09,396 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-24 21:12:09,397 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 27 transitions. [2018-06-24 21:12:09,397 INFO ]: Start accepts. Automaton has 19 states and 27 transitions. Word has length 12 [2018-06-24 21:12:09,397 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:09,397 INFO ]: Abstraction has 19 states and 27 transitions. [2018-06-24 21:12:09,397 INFO ]: Interpolant automaton has 8 states. [2018-06-24 21:12:09,397 INFO ]: Start isEmpty. Operand 19 states and 27 transitions. [2018-06-24 21:12:09,397 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-24 21:12:09,397 INFO ]: Found error trace [2018-06-24 21:12:09,398 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:09,398 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:09,398 INFO ]: Analyzing trace with hash -1565838233, now seen corresponding path program 1 times [2018-06-24 21:12:09,398 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:09,398 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:09,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:09,399 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:09,399 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:09,409 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:09,443 INFO ]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-06-24 21:12:09,443 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:09,443 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-24 21:12:09,443 INFO ]: Interpolant automaton has 4 states [2018-06-24 21:12:09,443 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-24 21:12:09,443 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:12:09,443 INFO ]: Start difference. First operand 19 states and 27 transitions. Second operand 4 states. [2018-06-24 21:12:09,454 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:09,454 INFO ]: Finished difference Result 14 states and 17 transitions. [2018-06-24 21:12:09,454 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-24 21:12:09,454 INFO ]: Start accepts. Automaton has 4 states. Word has length 12 [2018-06-24 21:12:09,454 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:09,454 INFO ]: With dead ends: 14 [2018-06-24 21:12:09,454 INFO ]: Without dead ends: 0 [2018-06-24 21:12:09,454 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-24 21:12:09,454 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:12:09,454 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:12:09,455 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:12:09,455 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:12:09,455 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2018-06-24 21:12:09,455 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:09,455 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:12:09,455 INFO ]: Interpolant automaton has 4 states. [2018-06-24 21:12:09,455 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:12:09,455 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:12:09,457 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:12:09,459 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:12:09 BasicIcfg [2018-06-24 21:12:09,459 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:12:09,460 INFO ]: Toolchain (without parser) took 4126.75 ms. Allocated memory was 309.3 MB in the beginning and 326.6 MB in the end (delta: 17.3 MB). Free memory was 263.7 MB in the beginning and 220.7 MB in the end (delta: 43.0 MB). Peak memory consumption was 60.3 MB. Max. memory is 3.6 GB. [2018-06-24 21:12:09,461 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:12:09,461 INFO ]: ChcToBoogie took 64.11 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-24 21:12:09,462 INFO ]: Boogie Preprocessor took 39.43 ms. Allocated memory is still 309.3 MB. Free memory is still 261.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:12:09,462 INFO ]: RCFGBuilder took 376.79 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:12:09,463 INFO ]: BlockEncodingV2 took 134.61 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 247.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:12:09,463 INFO ]: TraceAbstraction took 3502.49 ms. Allocated memory was 309.3 MB in the beginning and 326.6 MB in the end (delta: 17.3 MB). Free memory was 247.7 MB in the beginning and 220.7 MB in the end (delta: 27.0 MB). Peak memory consumption was 44.3 MB. Max. memory is 3.6 GB. [2018-06-24 21:12:09,467 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 13 locations, 19 edges - StatisticsResult: Encoded RCFG 8 locations, 13 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 64.11 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 261.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 39.43 ms. Allocated memory is still 309.3 MB. Free memory is still 261.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 376.79 ms. Allocated memory is still 309.3 MB. Free memory was 259.6 MB in the beginning and 251.7 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 134.61 ms. Allocated memory is still 309.3 MB. Free memory was 251.7 MB in the beginning and 247.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3502.49 ms. Allocated memory was 309.3 MB in the beginning and 326.6 MB in the end (delta: 17.3 MB). Free memory was 247.7 MB in the beginning and 220.7 MB in the end (delta: 27.0 MB). Peak memory consumption was 44.3 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, 8 locations, 1 error locations. SAFE Result, 3.4s OverallTime, 8 OverallIterations, 2 TraceHistogramMax, 1.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 80 SDtfs, 29 SDslu, 126 SDs, 0 SdLazy, 247 SolverSat, 53 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=7, 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, 8 MinimizatonAttempts, 8 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 2260 SizeOfPredicates, 10 NumberOfNonLiveVariables, 291 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 48/54 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/inductive.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-12-09-478.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inductive.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-12-09-478.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inductive.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-12-09-478.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/inductive.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-12-09-478.csv Received shutdown request...