java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/reve/023b-horn.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:21:11,832 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:21:11,834 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:21:11,846 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:21:11,847 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:21:11,847 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:21:11,849 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:21:11,851 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:21:11,853 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:21:11,854 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:21:11,854 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:21:11,855 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:21:11,856 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:21:11,857 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:21:11,858 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:21:11,859 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:21:11,861 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:21:11,863 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:21:11,865 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:21:11,866 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:21:11,868 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:21:11,871 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:21:11,871 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:21:11,871 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:21:11,872 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:21:11,873 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:21:11,874 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:21:11,875 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:21:11,876 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:21:11,877 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:21:11,877 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:21:11,878 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:21:11,878 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:21:11,879 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:21:11,880 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:21:11,881 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:21:11,895 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:21:11,895 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:21:11,896 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:21:11,896 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:21:11,897 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:21:11,897 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:21:11,898 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:21:11,898 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:21:11,898 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:21:11,899 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:21:11,899 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:21:11,899 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:21:11,900 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:21:11,900 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:21:11,900 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:21:11,900 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:21:11,901 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:21:11,901 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:21:11,901 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:21:11,903 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:21:11,903 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:21:11,952 INFO ]: Repository-Root is: /tmp [2018-06-22 11:21:11,969 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:21:11,975 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:21:11,976 INFO ]: Initializing SmtParser... [2018-06-22 11:21:11,977 INFO ]: SmtParser initialized [2018-06-22 11:21:11,978 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/reve/023b-horn.smt2 [2018-06-22 11:21:11,979 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 [2018-06-22 11:21:12,067 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/reve/023b-horn.smt2 unknown [2018-06-22 11:21:12,213 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/reve/023b-horn.smt2 [2018-06-22 11:21:12,217 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:21:12,224 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:21:12,224 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:21:12,224 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:21:12,225 INFO ]: ChcToBoogie initialized [2018-06-22 11:21:12,229 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,276 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12 Unit [2018-06-22 11:21:12,277 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:21:12,277 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:21:12,277 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:21:12,277 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:21:12,300 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,300 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,307 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,308 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,310 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,315 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,316 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... [2018-06-22 11:21:12,317 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:21:12,318 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:21:12,318 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:21:12,318 INFO ]: RCFGBuilder initialized [2018-06-22 11:21:12,319 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:21:12,331 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:21:12,331 INFO ]: Found specification of procedure False [2018-06-22 11:21:12,331 INFO ]: Found implementation of procedure False [2018-06-22 11:21:12,331 INFO ]: Specification and implementation of procedure INV1 given in one single declaration [2018-06-22 11:21:12,331 INFO ]: Found specification of procedure INV1 [2018-06-22 11:21:12,331 INFO ]: Found implementation of procedure INV1 [2018-06-22 11:21:12,331 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:21:12,331 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:21:12,331 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 11:21:12,527 INFO ]: Using library mode [2018-06-22 11:21:12,528 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:21:12 BoogieIcfgContainer [2018-06-22 11:21:12,528 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:21:12,529 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:21:12,530 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:21:12,544 INFO ]: TraceAbstraction initialized [2018-06-22 11:21:12,544 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:21:12" (1/3) ... [2018-06-22 11:21:12,545 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f2b7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:21:12, skipping insertion in model container [2018-06-22 11:21:12,545 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:21:12" (2/3) ... [2018-06-22 11:21:12,545 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f2b7c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:21:12, skipping insertion in model container [2018-06-22 11:21:12,545 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:21:12" (3/3) ... [2018-06-22 11:21:12,547 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:21:12,565 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:21:12,576 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:21:12,621 INFO ]: Using default assertion order modulation [2018-06-22 11:21:12,621 INFO ]: Interprodecural is true [2018-06-22 11:21:12,621 INFO ]: Hoare is false [2018-06-22 11:21:12,621 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:21:12,621 INFO ]: Backedges is TWOTRACK [2018-06-22 11:21:12,621 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:21:12,622 INFO ]: Difference is false [2018-06-22 11:21:12,622 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:21:12,622 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:21:12,634 INFO ]: Start isEmpty. Operand 15 states. [2018-06-22 11:21:12,645 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 11:21:12,645 INFO ]: Found error trace [2018-06-22 11:21:12,646 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:12,646 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:12,649 INFO ]: Analyzing trace with hash -1409059775, now seen corresponding path program 1 times [2018-06-22 11:21:12,651 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:12,651 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:12,682 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:12,682 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:12,682 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:12,714 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:12,808 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:21:12,810 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:21:12,810 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:21:12,812 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:21:12,824 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:21:12,824 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:21:12,826 INFO ]: Start difference. First operand 15 states. Second operand 4 states. [2018-06-22 11:21:12,952 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:12,952 INFO ]: Finished difference Result 15 states and 22 transitions. [2018-06-22 11:21:12,953 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:21:12,954 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 11:21:12,954 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:12,964 INFO ]: With dead ends: 15 [2018-06-22 11:21:12,964 INFO ]: Without dead ends: 15 [2018-06-22 11:21:12,966 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 [2018-06-22 11:21:12,978 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 11:21:12,997 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 11:21:12,998 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 11:21:12,999 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 22 transitions. [2018-06-22 11:21:13,000 INFO ]: Start accepts. Automaton has 15 states and 22 transitions. Word has length 9 [2018-06-22 11:21:13,001 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:13,001 INFO ]: Abstraction has 15 states and 22 transitions. [2018-06-22 11:21:13,001 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:21:13,002 INFO ]: Start isEmpty. Operand 15 states and 22 transitions. [2018-06-22 11:21:13,003 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:21:13,003 INFO ]: Found error trace [2018-06-22 11:21:13,003 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:13,003 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:13,004 INFO ]: Analyzing trace with hash 1397489035, now seen corresponding path program 1 times [2018-06-22 11:21:13,004 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:13,004 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:13,005 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:13,005 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:13,005 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:13,019 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:13,059 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:21:13,059 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:21:13,059 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 11:21:13,061 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:21:13,061 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:21:13,061 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:21:13,061 INFO ]: Start difference. First operand 15 states and 22 transitions. Second operand 4 states. [2018-06-22 11:21:13,358 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:13,358 INFO ]: Finished difference Result 24 states and 43 transitions. [2018-06-22 11:21:13,359 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:21:13,359 INFO ]: Start accepts. Automaton has 4 states. Word has length 13 [2018-06-22 11:21:13,359 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:13,360 INFO ]: With dead ends: 24 [2018-06-22 11:21:13,360 INFO ]: Without dead ends: 24 [2018-06-22 11:21:13,361 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 [2018-06-22 11:21:13,361 INFO ]: Start minimizeSevpa. Operand 24 states. [2018-06-22 11:21:13,373 INFO ]: Finished minimizeSevpa. Reduced states from 24 to 22. [2018-06-22 11:21:13,373 INFO ]: Start removeUnreachable. Operand 22 states. [2018-06-22 11:21:13,377 INFO ]: Finished removeUnreachable. Reduced from 22 states to 22 states and 38 transitions. [2018-06-22 11:21:13,377 INFO ]: Start accepts. Automaton has 22 states and 38 transitions. Word has length 13 [2018-06-22 11:21:13,377 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:13,377 INFO ]: Abstraction has 22 states and 38 transitions. [2018-06-22 11:21:13,377 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:21:13,377 INFO ]: Start isEmpty. Operand 22 states and 38 transitions. [2018-06-22 11:21:13,378 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 11:21:13,379 INFO ]: Found error trace [2018-06-22 11:21:13,379 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:13,379 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:13,379 INFO ]: Analyzing trace with hash 1300014339, now seen corresponding path program 1 times [2018-06-22 11:21:13,379 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:13,379 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:13,381 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:13,381 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:13,381 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:13,393 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:13,479 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:21:13,480 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:13,480 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 [2018-06-22 11:21:13,486 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:13,517 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:13,525 INFO ]: Computing forward predicates... [2018-06-22 11:21:13,647 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:21:13,671 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:13,671 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 11:21:13,671 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:21:13,671 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:21:13,671 INFO ]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:21:13,671 INFO ]: Start difference. First operand 22 states and 38 transitions. Second operand 10 states. [2018-06-22 11:21:14,520 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:14,520 INFO ]: Finished difference Result 48 states and 87 transitions. [2018-06-22 11:21:14,520 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 11:21:14,520 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 11:21:14,520 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:14,522 INFO ]: With dead ends: 48 [2018-06-22 11:21:14,522 INFO ]: Without dead ends: 48 [2018-06-22 11:21:14,523 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:21:14,523 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-22 11:21:14,534 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 30. [2018-06-22 11:21:14,534 INFO ]: Start removeUnreachable. Operand 30 states. [2018-06-22 11:21:14,536 INFO ]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2018-06-22 11:21:14,536 INFO ]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 13 [2018-06-22 11:21:14,536 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:14,536 INFO ]: Abstraction has 30 states and 56 transitions. [2018-06-22 11:21:14,536 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:21:14,536 INFO ]: Start isEmpty. Operand 30 states and 56 transitions. [2018-06-22 11:21:14,538 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 11:21:14,538 INFO ]: Found error trace [2018-06-22 11:21:14,538 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:14,538 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:14,538 INFO ]: Analyzing trace with hash -829829691, now seen corresponding path program 2 times [2018-06-22 11:21:14,538 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:14,538 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:14,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:14,539 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:14,539 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:14,551 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:14,662 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:21:14,662 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:14,662 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 [2018-06-22 11:21:14,673 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:21:14,694 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:21:14,694 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:14,696 INFO ]: Computing forward predicates... [2018-06-22 11:21:14,772 INFO ]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:21:14,794 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:14,794 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 11:21:14,795 INFO ]: Interpolant automaton has 12 states [2018-06-22 11:21:14,795 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 11:21:14,795 INFO ]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:21:14,795 INFO ]: Start difference. First operand 30 states and 56 transitions. Second operand 12 states. [2018-06-22 11:21:15,478 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:15,478 INFO ]: Finished difference Result 82 states and 149 transitions. [2018-06-22 11:21:15,479 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:21:15,479 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 11:21:15,479 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:15,482 INFO ]: With dead ends: 82 [2018-06-22 11:21:15,482 INFO ]: Without dead ends: 82 [2018-06-22 11:21:15,483 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2018-06-22 11:21:15,483 INFO ]: Start minimizeSevpa. Operand 82 states. [2018-06-22 11:21:15,501 INFO ]: Finished minimizeSevpa. Reduced states from 82 to 42. [2018-06-22 11:21:15,501 INFO ]: Start removeUnreachable. Operand 42 states. [2018-06-22 11:21:15,503 INFO ]: Finished removeUnreachable. Reduced from 42 states to 42 states and 84 transitions. [2018-06-22 11:21:15,503 INFO ]: Start accepts. Automaton has 42 states and 84 transitions. Word has length 17 [2018-06-22 11:21:15,503 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:15,503 INFO ]: Abstraction has 42 states and 84 transitions. [2018-06-22 11:21:15,503 INFO ]: Interpolant automaton has 12 states. [2018-06-22 11:21:15,503 INFO ]: Start isEmpty. Operand 42 states and 84 transitions. [2018-06-22 11:21:15,505 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 11:21:15,505 INFO ]: Found error trace [2018-06-22 11:21:15,505 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:15,506 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:15,506 INFO ]: Analyzing trace with hash -1920422265, now seen corresponding path program 3 times [2018-06-22 11:21:15,506 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:15,506 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:15,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:15,507 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:21:15,507 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:15,525 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:15,654 INFO ]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-06-22 11:21:15,654 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:15,654 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 [2018-06-22 11:21:15,664 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:21:15,675 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-06-22 11:21:15,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:15,677 INFO ]: Computing forward predicates... [2018-06-22 11:21:15,717 INFO ]: Checked inductivity of 21 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:21:15,737 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:15,737 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2018-06-22 11:21:15,737 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:21:15,738 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:21:15,738 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:21:15,738 INFO ]: Start difference. First operand 42 states and 84 transitions. Second operand 10 states. [2018-06-22 11:21:15,944 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:15,944 INFO ]: Finished difference Result 82 states and 142 transitions. [2018-06-22 11:21:15,945 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 11:21:15,945 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-22 11:21:15,945 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:15,948 INFO ]: With dead ends: 82 [2018-06-22 11:21:15,948 INFO ]: Without dead ends: 82 [2018-06-22 11:21:15,948 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:21:15,948 INFO ]: Start minimizeSevpa. Operand 82 states. [2018-06-22 11:21:15,962 INFO ]: Finished minimizeSevpa. Reduced states from 82 to 44. [2018-06-22 11:21:15,962 INFO ]: Start removeUnreachable. Operand 44 states. [2018-06-22 11:21:15,963 INFO ]: Finished removeUnreachable. Reduced from 44 states to 44 states and 89 transitions. [2018-06-22 11:21:15,964 INFO ]: Start accepts. Automaton has 44 states and 89 transitions. Word has length 21 [2018-06-22 11:21:15,964 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:15,964 INFO ]: Abstraction has 44 states and 89 transitions. [2018-06-22 11:21:15,964 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:21:15,964 INFO ]: Start isEmpty. Operand 44 states and 89 transitions. [2018-06-22 11:21:15,966 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:21:15,966 INFO ]: Found error trace [2018-06-22 11:21:15,966 INFO ]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:15,966 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:15,966 INFO ]: Analyzing trace with hash 565268538, now seen corresponding path program 1 times [2018-06-22 11:21:15,966 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:15,966 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:15,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:15,967 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:21:15,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:15,974 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,001 INFO ]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 11:21:16,001 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:16,002 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 [2018-06-22 11:21:16,007 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,039 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,041 INFO ]: Computing forward predicates... [2018-06-22 11:21:16,055 INFO ]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 11:21:16,083 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:16,083 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 11:21:16,084 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:21:16,084 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:21:16,084 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:21:16,084 INFO ]: Start difference. First operand 44 states and 89 transitions. Second operand 4 states. [2018-06-22 11:21:16,130 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:16,130 INFO ]: Finished difference Result 44 states and 77 transitions. [2018-06-22 11:21:16,131 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:21:16,131 INFO ]: Start accepts. Automaton has 4 states. Word has length 25 [2018-06-22 11:21:16,131 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:16,132 INFO ]: With dead ends: 44 [2018-06-22 11:21:16,132 INFO ]: Without dead ends: 36 [2018-06-22 11:21:16,132 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:21:16,132 INFO ]: Start minimizeSevpa. Operand 36 states. [2018-06-22 11:21:16,139 INFO ]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-06-22 11:21:16,139 INFO ]: Start removeUnreachable. Operand 36 states. [2018-06-22 11:21:16,140 INFO ]: Finished removeUnreachable. Reduced from 36 states to 36 states and 63 transitions. [2018-06-22 11:21:16,140 INFO ]: Start accepts. Automaton has 36 states and 63 transitions. Word has length 25 [2018-06-22 11:21:16,140 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:16,140 INFO ]: Abstraction has 36 states and 63 transitions. [2018-06-22 11:21:16,140 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:21:16,140 INFO ]: Start isEmpty. Operand 36 states and 63 transitions. [2018-06-22 11:21:16,142 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:21:16,142 INFO ]: Found error trace [2018-06-22 11:21:16,142 INFO ]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:16,142 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:16,142 INFO ]: Analyzing trace with hash 1438211066, now seen corresponding path program 2 times [2018-06-22 11:21:16,142 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:16,142 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:16,143 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,143 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,143 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,149 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,176 INFO ]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 11:21:16,176 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:16,176 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 [2018-06-22 11:21:16,184 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:21:16,198 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:21:16,199 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,200 INFO ]: Computing forward predicates... [2018-06-22 11:21:16,210 INFO ]: Checked inductivity of 33 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-22 11:21:16,229 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:16,229 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 11:21:16,229 INFO ]: Interpolant automaton has 4 states [2018-06-22 11:21:16,229 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 11:21:16,229 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 11:21:16,230 INFO ]: Start difference. First operand 36 states and 63 transitions. Second operand 4 states. [2018-06-22 11:21:16,273 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:16,273 INFO ]: Finished difference Result 47 states and 80 transitions. [2018-06-22 11:21:16,274 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 11:21:16,274 INFO ]: Start accepts. Automaton has 4 states. Word has length 25 [2018-06-22 11:21:16,274 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:16,275 INFO ]: With dead ends: 47 [2018-06-22 11:21:16,275 INFO ]: Without dead ends: 41 [2018-06-22 11:21:16,275 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 11:21:16,275 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 11:21:16,284 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-06-22 11:21:16,284 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-22 11:21:16,285 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 63 transitions. [2018-06-22 11:21:16,285 INFO ]: Start accepts. Automaton has 39 states and 63 transitions. Word has length 25 [2018-06-22 11:21:16,285 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:16,285 INFO ]: Abstraction has 39 states and 63 transitions. [2018-06-22 11:21:16,285 INFO ]: Interpolant automaton has 4 states. [2018-06-22 11:21:16,285 INFO ]: Start isEmpty. Operand 39 states and 63 transitions. [2018-06-22 11:21:16,286 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:21:16,286 INFO ]: Found error trace [2018-06-22 11:21:16,287 INFO ]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:16,287 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:16,287 INFO ]: Analyzing trace with hash -1222510127, now seen corresponding path program 1 times [2018-06-22 11:21:16,287 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:16,287 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:16,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,287 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:21:16,287 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,404 INFO ]: Checked inductivity of 33 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:21:16,404 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:16,404 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:21:16,410 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,430 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,432 INFO ]: Computing forward predicates... [2018-06-22 11:21:16,446 INFO ]: Checked inductivity of 33 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2018-06-22 11:21:16,465 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:16,465 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 11:21:16,465 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:21:16,465 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:21:16,465 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:21:16,465 INFO ]: Start difference. First operand 39 states and 63 transitions. Second operand 8 states. [2018-06-22 11:21:16,555 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:16,555 INFO ]: Finished difference Result 55 states and 88 transitions. [2018-06-22 11:21:16,555 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 11:21:16,555 INFO ]: Start accepts. Automaton has 8 states. Word has length 25 [2018-06-22 11:21:16,555 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:16,556 INFO ]: With dead ends: 55 [2018-06-22 11:21:16,556 INFO ]: Without dead ends: 55 [2018-06-22 11:21:16,556 INFO ]: 0 DeclaredPredicates, 38 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 11:21:16,556 INFO ]: Start minimizeSevpa. Operand 55 states. [2018-06-22 11:21:16,564 INFO ]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-06-22 11:21:16,564 INFO ]: Start removeUnreachable. Operand 55 states. [2018-06-22 11:21:16,565 INFO ]: Finished removeUnreachable. Reduced from 55 states to 55 states and 88 transitions. [2018-06-22 11:21:16,565 INFO ]: Start accepts. Automaton has 55 states and 88 transitions. Word has length 25 [2018-06-22 11:21:16,565 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:16,565 INFO ]: Abstraction has 55 states and 88 transitions. [2018-06-22 11:21:16,565 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:21:16,565 INFO ]: Start isEmpty. Operand 55 states and 88 transitions. [2018-06-22 11:21:16,567 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:21:16,567 INFO ]: Found error trace [2018-06-22 11:21:16,567 INFO ]: trace histogram [6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:16,567 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:16,567 INFO ]: Analyzing trace with hash 468472686, now seen corresponding path program 1 times [2018-06-22 11:21:16,567 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:16,567 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:16,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,568 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,581 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,656 INFO ]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:21:16,656 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:16,656 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 [2018-06-22 11:21:16,671 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,693 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:16,695 INFO ]: Computing forward predicates... [2018-06-22 11:21:16,726 INFO ]: Checked inductivity of 51 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:21:16,748 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:16,748 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-22 11:21:16,748 INFO ]: Interpolant automaton has 10 states [2018-06-22 11:21:16,748 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 11:21:16,748 INFO ]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:21:16,749 INFO ]: Start difference. First operand 55 states and 88 transitions. Second operand 10 states. [2018-06-22 11:21:16,868 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:16,868 INFO ]: Finished difference Result 85 states and 147 transitions. [2018-06-22 11:21:16,869 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:21:16,869 INFO ]: Start accepts. Automaton has 10 states. Word has length 29 [2018-06-22 11:21:16,869 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:16,871 INFO ]: With dead ends: 85 [2018-06-22 11:21:16,871 INFO ]: Without dead ends: 81 [2018-06-22 11:21:16,871 INFO ]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:21:16,871 INFO ]: Start minimizeSevpa. Operand 81 states. [2018-06-22 11:21:16,887 INFO ]: Finished minimizeSevpa. Reduced states from 81 to 69. [2018-06-22 11:21:16,887 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-22 11:21:16,888 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 113 transitions. [2018-06-22 11:21:16,888 INFO ]: Start accepts. Automaton has 69 states and 113 transitions. Word has length 29 [2018-06-22 11:21:16,890 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:16,890 INFO ]: Abstraction has 69 states and 113 transitions. [2018-06-22 11:21:16,890 INFO ]: Interpolant automaton has 10 states. [2018-06-22 11:21:16,890 INFO ]: Start isEmpty. Operand 69 states and 113 transitions. [2018-06-22 11:21:16,891 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:21:16,892 INFO ]: Found error trace [2018-06-22 11:21:16,892 INFO ]: trace histogram [7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:16,892 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:16,892 INFO ]: Analyzing trace with hash -1390828624, now seen corresponding path program 2 times [2018-06-22 11:21:16,892 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:16,892 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:16,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,893 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:21:16,893 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:16,913 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:17,087 INFO ]: Checked inductivity of 73 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-22 11:21:17,087 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:17,088 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:21:17,096 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:21:17,120 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:21:17,120 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:17,122 INFO ]: Computing forward predicates... [2018-06-22 11:21:17,323 INFO ]: Checked inductivity of 73 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2018-06-22 11:21:17,343 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:17,343 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2018-06-22 11:21:17,343 INFO ]: Interpolant automaton has 19 states [2018-06-22 11:21:17,343 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 11:21:17,343 INFO ]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2018-06-22 11:21:17,343 INFO ]: Start difference. First operand 69 states and 113 transitions. Second operand 19 states. [2018-06-22 11:21:17,837 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:17,837 INFO ]: Finished difference Result 43 states and 57 transitions. [2018-06-22 11:21:17,837 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:21:17,837 INFO ]: Start accepts. Automaton has 19 states. Word has length 33 [2018-06-22 11:21:17,837 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:17,838 INFO ]: With dead ends: 43 [2018-06-22 11:21:17,838 INFO ]: Without dead ends: 39 [2018-06-22 11:21:17,838 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=630, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:21:17,839 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-22 11:21:17,843 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 37. [2018-06-22 11:21:17,843 INFO ]: Start removeUnreachable. Operand 37 states. [2018-06-22 11:21:17,844 INFO ]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2018-06-22 11:21:17,844 INFO ]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 33 [2018-06-22 11:21:17,844 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:17,844 INFO ]: Abstraction has 37 states and 48 transitions. [2018-06-22 11:21:17,844 INFO ]: Interpolant automaton has 19 states. [2018-06-22 11:21:17,844 INFO ]: Start isEmpty. Operand 37 states and 48 transitions. [2018-06-22 11:21:17,845 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:21:17,845 INFO ]: Found error trace [2018-06-22 11:21:17,845 INFO ]: trace histogram [9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:17,845 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:17,845 INFO ]: Analyzing trace with hash -1567193895, now seen corresponding path program 2 times [2018-06-22 11:21:17,845 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:17,845 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:17,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:17,846 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:21:17,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:17,861 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:17,946 INFO ]: Checked inductivity of 129 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2018-06-22 11:21:17,947 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:17,947 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:21:17,952 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:21:17,976 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:21:17,976 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:17,979 INFO ]: Computing forward predicates... [2018-06-22 11:21:18,014 INFO ]: Checked inductivity of 129 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2018-06-22 11:21:18,033 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:18,033 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2018-06-22 11:21:18,034 INFO ]: Interpolant automaton has 13 states [2018-06-22 11:21:18,034 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 11:21:18,034 INFO ]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2018-06-22 11:21:18,034 INFO ]: Start difference. First operand 37 states and 48 transitions. Second operand 13 states. [2018-06-22 11:21:18,235 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:18,235 INFO ]: Finished difference Result 50 states and 67 transitions. [2018-06-22 11:21:18,235 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 11:21:18,235 INFO ]: Start accepts. Automaton has 13 states. Word has length 41 [2018-06-22 11:21:18,235 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:18,236 INFO ]: With dead ends: 50 [2018-06-22 11:21:18,236 INFO ]: Without dead ends: 47 [2018-06-22 11:21:18,236 INFO ]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:21:18,236 INFO ]: Start minimizeSevpa. Operand 47 states. [2018-06-22 11:21:18,240 INFO ]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-06-22 11:21:18,240 INFO ]: Start removeUnreachable. Operand 47 states. [2018-06-22 11:21:18,241 INFO ]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2018-06-22 11:21:18,241 INFO ]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 41 [2018-06-22 11:21:18,241 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:18,241 INFO ]: Abstraction has 47 states and 62 transitions. [2018-06-22 11:21:18,241 INFO ]: Interpolant automaton has 13 states. [2018-06-22 11:21:18,241 INFO ]: Start isEmpty. Operand 47 states and 62 transitions. [2018-06-22 11:21:18,243 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 11:21:18,243 INFO ]: Found error trace [2018-06-22 11:21:18,243 INFO ]: trace histogram [10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:21:18,243 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:21:18,243 INFO ]: Analyzing trace with hash 1721656438, now seen corresponding path program 3 times [2018-06-22 11:21:18,243 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:21:18,243 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:21:18,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:18,244 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:21:18,244 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:21:18,259 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:18,523 INFO ]: Checked inductivity of 163 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-22 11:21:18,524 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:21:18,524 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:21:18,531 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:21:18,568 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:21:18,568 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:21:18,571 INFO ]: Computing forward predicates... [2018-06-22 11:21:18,720 INFO ]: Checked inductivity of 163 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2018-06-22 11:21:18,739 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:21:18,739 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2018-06-22 11:21:18,739 INFO ]: Interpolant automaton has 18 states [2018-06-22 11:21:18,740 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 11:21:18,740 INFO ]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:21:18,740 INFO ]: Start difference. First operand 47 states and 62 transitions. Second operand 18 states. [2018-06-22 11:21:18,981 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:21:18,981 INFO ]: Finished difference Result 61 states and 88 transitions. [2018-06-22 11:21:18,982 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 11:21:18,982 INFO ]: Start accepts. Automaton has 18 states. Word has length 45 [2018-06-22 11:21:18,982 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:21:18,982 INFO ]: With dead ends: 61 [2018-06-22 11:21:18,982 INFO ]: Without dead ends: 0 [2018-06-22 11:21:18,982 INFO ]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=644, Unknown=0, NotChecked=0, Total=930 [2018-06-22 11:21:18,982 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 11:21:18,983 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 11:21:18,983 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 11:21:18,983 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 11:21:18,983 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2018-06-22 11:21:18,983 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:21:18,983 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 11:21:18,983 INFO ]: Interpolant automaton has 18 states. [2018-06-22 11:21:18,983 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 11:21:18,983 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 11:21:18,988 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:21:18 BoogieIcfgContainer [2018-06-22 11:21:18,988 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:21:18,989 INFO ]: Toolchain (without parser) took 6770.73 ms. Allocated memory was 309.3 MB in the beginning and 381.2 MB in the end (delta: 71.8 MB). Free memory was 266.7 MB in the beginning and 269.4 MB in the end (delta: -2.7 MB). Peak memory consumption was 69.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:21:18,990 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:21:18,990 INFO ]: ChcToBoogie took 52.48 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:21:18,991 INFO ]: Boogie Preprocessor took 40.19 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 262.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:21:18,991 INFO ]: RCFGBuilder took 210.00 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 255.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:21:18,992 INFO ]: TraceAbstraction took 6458.28 ms. Allocated memory was 309.3 MB in the beginning and 381.2 MB in the end (delta: 71.8 MB). Free memory was 255.7 MB in the beginning and 269.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 58.1 MB. Max. memory is 3.6 GB. [2018-06-22 11:21:18,995 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 309.3 MB. Free memory is still 274.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 52.48 ms. Allocated memory is still 309.3 MB. Free memory was 265.7 MB in the beginning and 263.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.19 ms. Allocated memory is still 309.3 MB. Free memory was 263.7 MB in the beginning and 262.7 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 210.00 ms. Allocated memory is still 309.3 MB. Free memory was 262.7 MB in the beginning and 255.7 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 6458.28 ms. Allocated memory was 309.3 MB in the beginning and 381.2 MB in the end (delta: 71.8 MB). Free memory was 255.7 MB in the beginning and 269.4 MB in the end (delta: -13.8 MB). Peak memory consumption was 58.1 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 3 procedures, 15 locations, 1 error locations. SAFE Result, 6.3s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 3.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 205 SDtfs, 117 SDslu, 582 SDs, 0 SdLazy, 1017 SolverSat, 305 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 459 GetRequests, 292 SyntacticMatches, 4 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 12 MinimizatonAttempts, 114 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 570 NumberOfCodeBlocks, 536 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 548 ConstructedInterpolants, 0 QuantifiedInterpolants, 36128 SizeOfPredicates, 40 NumberOfNonLiveVariables, 1274 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 22 InterpolantComputations, 2 PerfectInterpolantSequences, 684/1101 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/023b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-21-19-005.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/023b-horn.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-21-19-005.csv Received shutdown request...