java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 18:10:23,972 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 18:10:23,975 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 18:10:23,987 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 18:10:23,987 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 18:10:23,988 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 18:10:23,989 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 18:10:23,995 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 18:10:23,997 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 18:10:23,997 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 18:10:23,998 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 18:10:23,998 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 18:10:24,000 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 18:10:24,001 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 18:10:24,002 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 18:10:24,003 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 18:10:24,003 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 18:10:24,007 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 18:10:24,018 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 18:10:24,019 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 18:10:24,020 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 18:10:24,021 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 18:10:24,023 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 18:10:24,023 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 18:10:24,023 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 18:10:24,024 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 18:10:24,025 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 18:10:24,028 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 18:10:24,029 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 18:10:24,030 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 18:10:24,030 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 18:10:24,031 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 18:10:24,031 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 18:10:24,031 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 18:10:24,032 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 18:10:24,032 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 18:10:24,033 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 18:10:24,045 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 18:10:24,046 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 18:10:24,046 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 18:10:24,046 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 18:10:24,047 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 18:10:24,047 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 18:10:24,047 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 18:10:24,048 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 18:10:24,048 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 18:10:24,048 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 18:10:24,048 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 18:10:24,048 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 18:10:24,049 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:10:24,049 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 18:10:24,049 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 18:10:24,049 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 18:10:24,049 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 18:10:24,050 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 18:10:24,050 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 18:10:24,050 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 18:10:24,050 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 18:10:24,052 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 18:10:24,052 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 18:10:24,091 INFO ]: Repository-Root is: /tmp [2018-06-26 18:10:24,105 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 18:10:24,110 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 18:10:24,111 INFO ]: Initializing SmtParser... [2018-06-26 18:10:24,112 INFO ]: SmtParser initialized [2018-06-26 18:10:24,112 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-26 18:10:24,113 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-26 18:10:24,198 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 unknown [2018-06-26 18:10:24,337 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/024b-horn.smt2 [2018-06-26 18:10:24,342 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 18:10:24,349 INFO ]: Walking toolchain with 5 elements. [2018-06-26 18:10:24,349 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 18:10:24,349 INFO ]: Initializing ChcToBoogie... [2018-06-26 18:10:24,349 INFO ]: ChcToBoogie initialized [2018-06-26 18:10:24,353 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,410 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24 Unit [2018-06-26 18:10:24,411 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 18:10:24,411 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 18:10:24,411 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 18:10:24,411 INFO ]: Boogie Preprocessor initialized [2018-06-26 18:10:24,432 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,433 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,438 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,439 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,442 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,444 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,452 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,453 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 18:10:24,454 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 18:10:24,454 INFO ]: Initializing RCFGBuilder... [2018-06-26 18:10:24,454 INFO ]: RCFGBuilder initialized [2018-06-26 18:10:24,455 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-26 18:10:24,473 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 18:10:24,473 INFO ]: Found specification of procedure gotoProc [2018-06-26 18:10:24,473 INFO ]: Found implementation of procedure gotoProc [2018-06-26 18:10:24,473 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 18:10:24,473 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 18:10:24,473 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 18:10:24,789 INFO ]: Using library mode [2018-06-26 18:10:24,789 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:10:24 BoogieIcfgContainer [2018-06-26 18:10:24,789 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 18:10:24,790 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 18:10:24,790 INFO ]: Initializing BlockEncodingV2... [2018-06-26 18:10:24,790 INFO ]: BlockEncodingV2 initialized [2018-06-26 18:10:24,791 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:10:24" (1/1) ... [2018-06-26 18:10:24,803 INFO ]: Initial Icfg 12 locations, 16 edges [2018-06-26 18:10:24,805 INFO ]: Using Remove infeasible edges [2018-06-26 18:10:24,805 INFO ]: Using Maximize final states [2018-06-26 18:10:24,806 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 18:10:24,806 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 18:10:24,808 INFO ]: Using Remove sink states [2018-06-26 18:10:24,808 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 18:10:24,808 INFO ]: Using Use SBE [2018-06-26 18:10:24,814 INFO ]: SBE split 0 edges [2018-06-26 18:10:24,823 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 18:10:24,825 INFO ]: 0 new accepting states [2018-06-26 18:10:24,864 INFO ]: Removed 6 edges and 2 locations by large block encoding [2018-06-26 18:10:24,866 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:10:24,869 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 18:10:24,869 INFO ]: 0 new accepting states [2018-06-26 18:10:24,870 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 18:10:24,870 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 18:10:24,870 INFO ]: Encoded RCFG 8 locations, 12 edges [2018-06-26 18:10:24,871 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:10:24 BasicIcfg [2018-06-26 18:10:24,871 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 18:10:24,873 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 18:10:24,873 INFO ]: Initializing TraceAbstraction... [2018-06-26 18:10:24,876 INFO ]: TraceAbstraction initialized [2018-06-26 18:10:24,876 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 06:10:24" (1/4) ... [2018-06-26 18:10:24,877 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 06:10:24, skipping insertion in model container [2018-06-26 18:10:24,877 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 06:10:24" (2/4) ... [2018-06-26 18:10:24,878 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 06:10:24, skipping insertion in model container [2018-06-26 18:10:24,878 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 06:10:24" (3/4) ... [2018-06-26 18:10:24,878 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7e8b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:10:24, skipping insertion in model container [2018-06-26 18:10:24,878 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 06:10:24" (4/4) ... [2018-06-26 18:10:24,880 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 18:10:24,888 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 18:10:24,894 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 18:10:24,935 INFO ]: Using default assertion order modulation [2018-06-26 18:10:24,935 INFO ]: Interprodecural is true [2018-06-26 18:10:24,935 INFO ]: Hoare is false [2018-06-26 18:10:24,935 INFO ]: Compute interpolants for FPandBP [2018-06-26 18:10:24,935 INFO ]: Backedges is TWOTRACK [2018-06-26 18:10:24,935 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 18:10:24,935 INFO ]: Difference is false [2018-06-26 18:10:24,935 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 18:10:24,935 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 18:10:24,951 INFO ]: Start isEmpty. Operand 8 states. [2018-06-26 18:10:24,961 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 18:10:24,961 INFO ]: Found error trace [2018-06-26 18:10:24,962 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 18:10:24,962 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:24,967 INFO ]: Analyzing trace with hash 41130314, now seen corresponding path program 1 times [2018-06-26 18:10:24,969 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:24,969 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:25,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,000 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:25,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,050 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:25,226 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 19 [2018-06-26 18:10:25,229 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:25,232 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 18:10:25,232 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 18:10:25,234 INFO ]: Interpolant automaton has 3 states [2018-06-26 18:10:25,247 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 18:10:25,248 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:10:25,251 INFO ]: Start difference. First operand 8 states. Second operand 3 states. [2018-06-26 18:10:25,343 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:25,343 INFO ]: Finished difference Result 12 states and 20 transitions. [2018-06-26 18:10:25,343 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:10:25,344 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 18:10:25,344 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:25,352 INFO ]: With dead ends: 12 [2018-06-26 18:10:25,352 INFO ]: Without dead ends: 12 [2018-06-26 18:10:25,354 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 18:10:25,367 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-26 18:10:25,392 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 9. [2018-06-26 18:10:25,394 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 18:10:25,394 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 15 transitions. [2018-06-26 18:10:25,399 INFO ]: Start accepts. Automaton has 9 states and 15 transitions. Word has length 5 [2018-06-26 18:10:25,400 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:25,400 INFO ]: Abstraction has 9 states and 15 transitions. [2018-06-26 18:10:25,400 INFO ]: Interpolant automaton has 3 states. [2018-06-26 18:10:25,400 INFO ]: Start isEmpty. Operand 9 states and 15 transitions. [2018-06-26 18:10:25,400 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 18:10:25,400 INFO ]: Found error trace [2018-06-26 18:10:25,400 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 18:10:25,400 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:25,400 INFO ]: Analyzing trace with hash 1274567087, now seen corresponding path program 1 times [2018-06-26 18:10:25,401 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:25,401 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:25,401 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,401 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:25,401 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,423 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:25,618 WARN ]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 11 [2018-06-26 18:10:25,680 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:25,680 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:25,680 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:25,687 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:25,708 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:25,716 INFO ]: Computing forward predicates... [2018-06-26 18:10:25,750 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:25,771 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:25,771 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 18:10:25,771 INFO ]: Interpolant automaton has 5 states [2018-06-26 18:10:25,771 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 18:10:25,772 INFO ]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:10:25,772 INFO ]: Start difference. First operand 9 states and 15 transitions. Second operand 5 states. [2018-06-26 18:10:25,959 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:25,959 INFO ]: Finished difference Result 13 states and 21 transitions. [2018-06-26 18:10:25,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 18:10:25,960 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 18:10:25,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:25,960 INFO ]: With dead ends: 13 [2018-06-26 18:10:25,960 INFO ]: Without dead ends: 13 [2018-06-26 18:10:25,961 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2018-06-26 18:10:25,961 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 18:10:25,963 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 10. [2018-06-26 18:10:25,963 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 18:10:25,963 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 16 transitions. [2018-06-26 18:10:25,963 INFO ]: Start accepts. Automaton has 10 states and 16 transitions. Word has length 6 [2018-06-26 18:10:25,963 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:25,963 INFO ]: Abstraction has 10 states and 16 transitions. [2018-06-26 18:10:25,963 INFO ]: Interpolant automaton has 5 states. [2018-06-26 18:10:25,963 INFO ]: Start isEmpty. Operand 10 states and 16 transitions. [2018-06-26 18:10:25,963 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 18:10:25,964 INFO ]: Found error trace [2018-06-26 18:10:25,964 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 18:10:25,964 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:25,964 INFO ]: Analyzing trace with hash 856401386, now seen corresponding path program 2 times [2018-06-26 18:10:25,964 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:25,964 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:25,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,965 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:25,965 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:25,988 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:26,159 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:26,159 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:26,159 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:26,165 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 18:10:26,214 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 18:10:26,214 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:26,217 INFO ]: Computing forward predicates... [2018-06-26 18:10:26,365 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:26,384 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:26,384 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-26 18:10:26,384 INFO ]: Interpolant automaton has 7 states [2018-06-26 18:10:26,384 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-26 18:10:26,384 INFO ]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2018-06-26 18:10:26,385 INFO ]: Start difference. First operand 10 states and 16 transitions. Second operand 7 states. [2018-06-26 18:10:26,665 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:26,666 INFO ]: Finished difference Result 18 states and 30 transitions. [2018-06-26 18:10:26,666 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 18:10:26,666 INFO ]: Start accepts. Automaton has 7 states. Word has length 7 [2018-06-26 18:10:26,666 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:26,667 INFO ]: With dead ends: 18 [2018-06-26 18:10:26,667 INFO ]: Without dead ends: 18 [2018-06-26 18:10:26,667 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-26 18:10:26,667 INFO ]: Start minimizeSevpa. Operand 18 states. [2018-06-26 18:10:26,669 INFO ]: Finished minimizeSevpa. Reduced states from 18 to 12. [2018-06-26 18:10:26,669 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-26 18:10:26,670 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 20 transitions. [2018-06-26 18:10:26,670 INFO ]: Start accepts. Automaton has 12 states and 20 transitions. Word has length 7 [2018-06-26 18:10:26,670 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:26,670 INFO ]: Abstraction has 12 states and 20 transitions. [2018-06-26 18:10:26,670 INFO ]: Interpolant automaton has 7 states. [2018-06-26 18:10:26,670 INFO ]: Start isEmpty. Operand 12 states and 20 transitions. [2018-06-26 18:10:26,670 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 18:10:26,670 INFO ]: Found error trace [2018-06-26 18:10:26,670 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-06-26 18:10:26,670 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:26,671 INFO ]: Analyzing trace with hash 778194412, now seen corresponding path program 1 times [2018-06-26 18:10:26,671 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:26,671 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:26,672 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:26,672 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:10:26,672 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:26,683 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:26,725 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-26 18:10:26,725 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:26,726 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:26,731 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:26,757 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:26,759 INFO ]: Computing forward predicates... [2018-06-26 18:10:26,766 INFO ]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-26 18:10:26,797 INFO ]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-06-26 18:10:26,798 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2018-06-26 18:10:26,798 INFO ]: Interpolant automaton has 4 states [2018-06-26 18:10:26,798 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 18:10:26,798 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:10:26,798 INFO ]: Start difference. First operand 12 states and 20 transitions. Second operand 4 states. [2018-06-26 18:10:26,806 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:26,806 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-26 18:10:26,806 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 18:10:26,806 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-26 18:10:26,806 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:26,807 INFO ]: With dead ends: 10 [2018-06-26 18:10:26,807 INFO ]: Without dead ends: 10 [2018-06-26 18:10:26,807 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 18:10:26,807 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-26 18:10:26,808 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-26 18:10:26,808 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-26 18:10:26,808 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-26 18:10:26,808 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-26 18:10:26,808 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:26,808 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-26 18:10:26,808 INFO ]: Interpolant automaton has 4 states. [2018-06-26 18:10:26,808 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-26 18:10:26,809 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-26 18:10:26,809 INFO ]: Found error trace [2018-06-26 18:10:26,809 INFO ]: trace histogram [4, 1, 1, 1, 1, 1] [2018-06-26 18:10:26,809 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:26,809 INFO ]: Analyzing trace with hash -1647113590, now seen corresponding path program 3 times [2018-06-26 18:10:26,809 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:26,809 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:26,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:26,810 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 18:10:26,810 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:26,831 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:27,204 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:27,204 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:27,204 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 18:10:27,222 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-26 18:10:27,288 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-26 18:10:27,288 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:27,291 INFO ]: Computing forward predicates... [2018-06-26 18:10:27,983 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:28,001 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:28,002 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2018-06-26 18:10:28,002 INFO ]: Interpolant automaton has 11 states [2018-06-26 18:10:28,002 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-26 18:10:28,002 INFO ]: CoverageRelationStatistics Valid=32, Invalid=77, Unknown=1, NotChecked=0, Total=110 [2018-06-26 18:10:28,002 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 11 states. [2018-06-26 18:10:28,514 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-06-26 18:10:30,994 WARN ]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2018-06-26 18:10:31,054 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:31,054 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-26 18:10:31,055 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-26 18:10:31,055 INFO ]: Start accepts. Automaton has 11 states. Word has length 9 [2018-06-26 18:10:31,055 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:31,055 INFO ]: With dead ends: 13 [2018-06-26 18:10:31,055 INFO ]: Without dead ends: 13 [2018-06-26 18:10:31,055 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=74, Invalid=165, Unknown=1, NotChecked=0, Total=240 [2018-06-26 18:10:31,055 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 18:10:31,056 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-26 18:10:31,056 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-26 18:10:31,056 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-26 18:10:31,056 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 9 [2018-06-26 18:10:31,057 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:31,057 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-26 18:10:31,057 INFO ]: Interpolant automaton has 11 states. [2018-06-26 18:10:31,057 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-26 18:10:31,057 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-26 18:10:31,057 INFO ]: Found error trace [2018-06-26 18:10:31,057 INFO ]: trace histogram [7, 1, 1, 1, 1, 1] [2018-06-26 18:10:31,057 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:31,057 INFO ]: Analyzing trace with hash 371058639, now seen corresponding path program 4 times [2018-06-26 18:10:31,057 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:31,057 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:31,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:31,058 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:10:31,058 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:31,103 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:31,303 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:31,303 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:31,304 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:31,313 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-26 18:10:31,350 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-26 18:10:31,350 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:31,357 INFO ]: Computing forward predicates... [2018-06-26 18:10:31,872 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:31,892 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:31,892 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-26 18:10:31,892 INFO ]: Interpolant automaton has 17 states [2018-06-26 18:10:31,892 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-26 18:10:31,892 INFO ]: CoverageRelationStatistics Valid=81, Invalid=190, Unknown=1, NotChecked=0, Total=272 [2018-06-26 18:10:31,893 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 17 states. [2018-06-26 18:10:32,449 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:32,449 INFO ]: Finished difference Result 20 states and 20 transitions. [2018-06-26 18:10:32,449 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-26 18:10:32,449 INFO ]: Start accepts. Automaton has 17 states. Word has length 12 [2018-06-26 18:10:32,449 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:32,449 INFO ]: With dead ends: 20 [2018-06-26 18:10:32,449 INFO ]: Without dead ends: 20 [2018-06-26 18:10:32,450 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=363, Unknown=1, NotChecked=0, Total=552 [2018-06-26 18:10:32,450 INFO ]: Start minimizeSevpa. Operand 20 states. [2018-06-26 18:10:32,452 INFO ]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-06-26 18:10:32,452 INFO ]: Start removeUnreachable. Operand 20 states. [2018-06-26 18:10:32,453 INFO ]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-06-26 18:10:32,453 INFO ]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 12 [2018-06-26 18:10:32,457 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:32,457 INFO ]: Abstraction has 20 states and 20 transitions. [2018-06-26 18:10:32,457 INFO ]: Interpolant automaton has 17 states. [2018-06-26 18:10:32,457 INFO ]: Start isEmpty. Operand 20 states and 20 transitions. [2018-06-26 18:10:32,458 INFO ]: Finished isEmpty. Found accepting run of length 20 [2018-06-26 18:10:32,458 INFO ]: Found error trace [2018-06-26 18:10:32,458 INFO ]: trace histogram [14, 1, 1, 1, 1, 1] [2018-06-26 18:10:32,458 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:32,458 INFO ]: Analyzing trace with hash 47983018, now seen corresponding path program 5 times [2018-06-26 18:10:32,458 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:32,458 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:32,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:32,459 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:10:32,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:32,509 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:32,740 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-26 18:10:33,187 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:33,187 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:33,187 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-26 18:10:33,202 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:33,347 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-26 18:10:33,347 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:33,355 INFO ]: Computing forward predicates... [2018-06-26 18:10:34,067 INFO ]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:34,087 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:34,087 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2018-06-26 18:10:34,087 INFO ]: Interpolant automaton has 32 states [2018-06-26 18:10:34,087 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-26 18:10:34,087 INFO ]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2018-06-26 18:10:34,087 INFO ]: Start difference. First operand 20 states and 20 transitions. Second operand 32 states. [2018-06-26 18:10:35,533 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:35,533 INFO ]: Finished difference Result 21 states and 21 transitions. [2018-06-26 18:10:35,534 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-26 18:10:35,534 INFO ]: Start accepts. Automaton has 32 states. Word has length 19 [2018-06-26 18:10:35,534 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:35,534 INFO ]: With dead ends: 21 [2018-06-26 18:10:35,534 INFO ]: Without dead ends: 21 [2018-06-26 18:10:35,535 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=224, Invalid=1846, Unknown=0, NotChecked=0, Total=2070 [2018-06-26 18:10:35,535 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-26 18:10:35,537 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-26 18:10:35,537 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-26 18:10:35,537 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-06-26 18:10:35,537 INFO ]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-06-26 18:10:35,537 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:35,537 INFO ]: Abstraction has 21 states and 21 transitions. [2018-06-26 18:10:35,537 INFO ]: Interpolant automaton has 32 states. [2018-06-26 18:10:35,537 INFO ]: Start isEmpty. Operand 21 states and 21 transitions. [2018-06-26 18:10:35,538 INFO ]: Finished isEmpty. Found accepting run of length 21 [2018-06-26 18:10:35,538 INFO ]: Found error trace [2018-06-26 18:10:35,538 INFO ]: trace histogram [15, 1, 1, 1, 1, 1] [2018-06-26 18:10:35,538 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 18:10:35,538 INFO ]: Analyzing trace with hash 1487000911, now seen corresponding path program 6 times [2018-06-26 18:10:35,538 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 18:10:35,538 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 18:10:35,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:35,539 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 18:10:35,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 18:10:35,589 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:35,870 INFO ]: Checked inductivity of 120 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2018-06-26 18:10:35,870 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 18:10:35,870 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 18:10:35,877 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-26 18:10:35,971 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-06-26 18:10:35,971 INFO ]: Conjunction of SSA is unsat [2018-06-26 18:10:35,977 INFO ]: Computing forward predicates... [2018-06-26 18:10:36,778 INFO ]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 18:10:36,809 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 18:10:36,809 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 18] total 21 [2018-06-26 18:10:36,809 INFO ]: Interpolant automaton has 21 states [2018-06-26 18:10:36,809 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-26 18:10:36,810 INFO ]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2018-06-26 18:10:36,810 INFO ]: Start difference. First operand 21 states and 21 transitions. Second operand 21 states. [2018-06-26 18:10:38,472 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 18:10:38,472 INFO ]: Finished difference Result 19 states and 19 transitions. [2018-06-26 18:10:38,547 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-26 18:10:38,547 INFO ]: Start accepts. Automaton has 21 states. Word has length 20 [2018-06-26 18:10:38,547 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 18:10:38,547 INFO ]: With dead ends: 19 [2018-06-26 18:10:38,547 INFO ]: Without dead ends: 0 [2018-06-26 18:10:38,548 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=102, Invalid=497, Unknown=1, NotChecked=0, Total=600 [2018-06-26 18:10:38,548 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-26 18:10:38,548 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-26 18:10:38,548 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-26 18:10:38,548 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-26 18:10:38,548 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2018-06-26 18:10:38,548 INFO ]: Finished accepts. word is rejected. [2018-06-26 18:10:38,548 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-26 18:10:38,548 INFO ]: Interpolant automaton has 21 states. [2018-06-26 18:10:38,548 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-26 18:10:38,548 INFO ]: Finished isEmpty. No accepting run. [2018-06-26 18:10:38,550 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 18:10:38,551 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 06:10:38 BasicIcfg [2018-06-26 18:10:38,551 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 18:10:38,552 INFO ]: Toolchain (without parser) took 14209.56 ms. Allocated memory was 304.1 MB in the beginning and 405.3 MB in the end (delta: 101.2 MB). Free memory was 260.4 MB in the beginning and 360.1 MB in the end (delta: -99.6 MB). Peak memory consumption was 1.5 MB. Max. memory is 3.6 GB. [2018-06-26 18:10:38,555 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 304.1 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:10:38,556 INFO ]: ChcToBoogie took 61.76 ms. Allocated memory is still 304.1 MB. Free memory was 258.4 MB in the beginning and 256.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:10:38,556 INFO ]: Boogie Preprocessor took 42.14 ms. Allocated memory is still 304.1 MB. Free memory is still 256.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:10:38,556 INFO ]: RCFGBuilder took 335.68 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 246.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:10:38,557 INFO ]: BlockEncodingV2 took 81.81 ms. Allocated memory is still 304.1 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 18:10:38,557 INFO ]: TraceAbstraction took 13678.98 ms. Allocated memory was 304.1 MB in the beginning and 405.3 MB in the end (delta: 101.2 MB). Free memory was 244.4 MB in the beginning and 360.1 MB in the end (delta: -115.7 MB). There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 18:10:38,559 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 12 locations, 16 edges - StatisticsResult: Encoded RCFG 8 locations, 12 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 304.1 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.76 ms. Allocated memory is still 304.1 MB. Free memory was 258.4 MB in the beginning and 256.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 42.14 ms. Allocated memory is still 304.1 MB. Free memory is still 256.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 335.68 ms. Allocated memory is still 304.1 MB. Free memory was 256.5 MB in the beginning and 246.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 81.81 ms. Allocated memory is still 304.1 MB. Free memory was 246.4 MB in the beginning and 244.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 13678.98 ms. Allocated memory was 304.1 MB in the beginning and 405.3 MB in the end (delta: 101.2 MB). Free memory was 244.4 MB in the beginning and 360.1 MB in the end (delta: -115.7 MB). There was no memory consumed. 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, 13.6s OverallTime, 8 OverallIterations, 15 TraceHistogramMax, 7.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 50 SDtfs, 31 SDslu, 202 SDs, 0 SdLazy, 815 SolverSat, 46 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 42 SyntacticMatches, 17 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 5.1s InterpolantComputationTime, 167 NumberOfCodeBlocks, 167 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 152 ConstructedInterpolants, 9 QuantifiedInterpolants, 25935 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1196 ConjunctsInSsa, 855 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 82/540 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/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_18-10-38-568.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_18-10-38-568.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_18-10-38-568.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/024b-horn.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_18-10-38-568.csv Received shutdown request...