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/vmt-chc-benchmarks/lustre/durationThm_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 17:21:54,923 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 17:21:54,926 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 17:21:54,938 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 17:21:54,938 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 17:21:54,939 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 17:21:54,940 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 17:21:54,942 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 17:21:54,944 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 17:21:54,945 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 17:21:54,945 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 17:21:54,946 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 17:21:54,947 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 17:21:54,948 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 17:21:54,948 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 17:21:54,949 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 17:21:54,951 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 17:21:54,953 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 17:21:54,960 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 17:21:54,961 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 17:21:54,962 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 17:21:54,965 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 17:21:54,965 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 17:21:54,966 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 17:21:54,967 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 17:21:54,968 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 17:21:54,968 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 17:21:54,969 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 17:21:54,970 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 17:21:54,971 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 17:21:54,972 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 17:21:54,972 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 17:21:54,972 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 17:21:54,973 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 17:21:54,974 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 17:21:54,974 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 17:21:54,989 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 17:21:54,989 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 17:21:54,989 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 17:21:54,990 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 17:21:54,991 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 17:21:54,991 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 17:21:54,991 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 17:21:54,991 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 17:21:54,991 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 17:21:54,992 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 17:21:54,992 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 17:21:54,992 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 17:21:54,992 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 17:21:54,992 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 17:21:54,993 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 17:21:54,993 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 17:21:54,993 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 17:21:54,993 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 17:21:54,993 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 17:21:54,995 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 17:21:54,995 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 17:21:55,047 INFO ]: Repository-Root is: /tmp [2018-06-22 17:21:55,060 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 17:21:55,064 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 17:21:55,066 INFO ]: Initializing SmtParser... [2018-06-22 17:21:55,066 INFO ]: SmtParser initialized [2018-06-22 17:21:55,067 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1.smt2 [2018-06-22 17:21:55,068 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 17:21:55,162 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1.smt2 unknown [2018-06-22 17:21:55,473 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_1.smt2 [2018-06-22 17:21:55,486 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 17:21:55,494 INFO ]: Walking toolchain with 4 elements. [2018-06-22 17:21:55,494 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 17:21:55,494 INFO ]: Initializing ChcToBoogie... [2018-06-22 17:21:55,494 INFO ]: ChcToBoogie initialized [2018-06-22 17:21:55,498 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,545 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55 Unit [2018-06-22 17:21:55,545 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 17:21:55,546 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 17:21:55,546 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 17:21:55,546 INFO ]: Boogie Preprocessor initialized [2018-06-22 17:21:55,569 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,570 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,578 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,578 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,585 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,587 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,588 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (1/1) ... [2018-06-22 17:21:55,596 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 17:21:55,596 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 17:21:55,596 INFO ]: Initializing RCFGBuilder... [2018-06-22 17:21:55,596 INFO ]: RCFGBuilder initialized [2018-06-22 17:21:55,597 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (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) [2018-06-22 17:21:55,615 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 17:21:55,615 INFO ]: Found specification of procedure False [2018-06-22 17:21:55,615 INFO ]: Found implementation of procedure False [2018-06-22 17:21:55,615 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 17:21:55,615 INFO ]: Found specification of procedure state [2018-06-22 17:21:55,615 INFO ]: Found implementation of procedure state [2018-06-22 17:21:55,615 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 17:21:55,615 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 17:21:55,615 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 [2018-06-22 17:21:55,899 INFO ]: Using library mode [2018-06-22 17:21:55,899 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:21:55 BoogieIcfgContainer [2018-06-22 17:21:55,899 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 17:21:55,901 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 17:21:55,901 INFO ]: Initializing TraceAbstraction... [2018-06-22 17:21:55,909 INFO ]: TraceAbstraction initialized [2018-06-22 17:21:55,909 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:21:55" (1/3) ... [2018-06-22 17:21:55,910 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2473c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:21:55, skipping insertion in model container [2018-06-22 17:21:55,910 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:21:55" (2/3) ... [2018-06-22 17:21:55,910 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2473c47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:21:55, skipping insertion in model container [2018-06-22 17:21:55,910 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:21:55" (3/3) ... [2018-06-22 17:21:55,912 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 17:21:55,922 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 17:21:55,930 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 17:21:55,975 INFO ]: Using default assertion order modulation [2018-06-22 17:21:55,976 INFO ]: Interprodecural is true [2018-06-22 17:21:55,976 INFO ]: Hoare is false [2018-06-22 17:21:55,976 INFO ]: Compute interpolants for FPandBP [2018-06-22 17:21:55,976 INFO ]: Backedges is TWOTRACK [2018-06-22 17:21:55,976 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 17:21:55,976 INFO ]: Difference is false [2018-06-22 17:21:55,976 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 17:21:55,976 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 17:21:55,989 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 17:21:55,999 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 17:21:55,999 INFO ]: Found error trace [2018-06-22 17:21:56,000 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:21:56,001 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:21:56,010 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 17:21:56,012 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:21:56,012 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:21:56,049 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:56,049 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:21:56,049 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:56,099 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:21:56,194 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 17:21:56,196 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 17:21:56,196 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 17:21:56,197 INFO ]: Interpolant automaton has 4 states [2018-06-22 17:21:56,208 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 17:21:56,208 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 17:21:56,210 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 17:21:56,294 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:21:56,294 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 17:21:56,295 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 17:21:56,296 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 17:21:56,297 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:21:56,307 INFO ]: With dead ends: 13 [2018-06-22 17:21:56,307 INFO ]: Without dead ends: 13 [2018-06-22 17:21:56,308 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 17:21:56,324 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 17:21:56,354 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 17:21:56,356 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 17:21:56,356 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 17:21:56,358 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 17:21:56,358 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:21:56,358 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 17:21:56,358 INFO ]: Interpolant automaton has 4 states. [2018-06-22 17:21:56,358 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 17:21:56,359 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 17:21:56,359 INFO ]: Found error trace [2018-06-22 17:21:56,359 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:21:56,360 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:21:56,360 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 17:21:56,360 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:21:56,360 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:21:56,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:56,362 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:21:56,362 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:56,435 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:21:56,742 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:21:56,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:21:56,742 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 17:21:56,749 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:21:56,827 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:21:56,837 INFO ]: Computing forward predicates... [2018-06-22 17:21:57,281 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 17:21:57,302 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:21:57,302 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 17:21:57,303 INFO ]: Interpolant automaton has 8 states [2018-06-22 17:21:57,303 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 17:21:57,303 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-22 17:21:57,304 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 17:21:57,540 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:21:57,541 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 17:21:57,542 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 17:21:57,542 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 17:21:57,542 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:21:57,543 INFO ]: With dead ends: 15 [2018-06-22 17:21:57,543 INFO ]: Without dead ends: 15 [2018-06-22 17:21:57,544 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 17:21:57,544 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 17:21:57,548 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 17:21:57,548 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 17:21:57,548 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 17:21:57,548 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 17:21:57,549 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:21:57,549 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 17:21:57,549 INFO ]: Interpolant automaton has 8 states. [2018-06-22 17:21:57,549 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 17:21:57,549 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 17:21:57,549 INFO ]: Found error trace [2018-06-22 17:21:57,549 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:21:57,549 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:21:57,550 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 17:21:57,550 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:21:57,550 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:21:57,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:57,550 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 17:21:57,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:21:57,637 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:21:58,151 WARN ]: Spent 330.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2018-06-22 17:21:58,293 WARN ]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-06-22 17:21:58,853 WARN ]: Spent 525.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 21 [2018-06-22 17:21:58,918 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:21:58,918 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:21:58,918 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 17:21:58,926 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 17:21:58,987 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 17:21:58,987 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:21:58,993 INFO ]: Computing forward predicates... [2018-06-22 17:21:59,113 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 17:21:59,264 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:00,522 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 22 [2018-06-22 17:22:00,826 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 36 [2018-06-22 17:22:01,119 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 17:22:01,153 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:22:01,153 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 17:22:01,154 INFO ]: Interpolant automaton has 13 states [2018-06-22 17:22:01,154 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 17:22:01,154 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-22 17:22:01,154 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 17:22:01,521 WARN ]: Spent 299.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2018-06-22 17:22:01,642 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2018-06-22 17:22:01,927 WARN ]: Spent 253.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 69 [2018-06-22 17:22:02,203 WARN ]: Spent 212.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2018-06-22 17:22:02,236 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:22:02,236 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 17:22:02,238 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 17:22:02,238 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 17:22:02,238 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:22:02,238 INFO ]: With dead ends: 17 [2018-06-22 17:22:02,238 INFO ]: Without dead ends: 17 [2018-06-22 17:22:02,239 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-22 17:22:02,239 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 17:22:02,242 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 17:22:02,242 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 17:22:02,242 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 17:22:02,242 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 17:22:02,243 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:22:02,243 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 17:22:02,243 INFO ]: Interpolant automaton has 13 states. [2018-06-22 17:22:02,243 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 17:22:02,243 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 17:22:02,243 INFO ]: Found error trace [2018-06-22 17:22:02,243 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:22:02,243 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:22:02,244 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 17:22:02,244 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:22:02,244 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:22:02,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:02,245 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:22:02,245 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:02,306 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:02,881 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:22:02,881 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:22:02,881 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 17:22:02,890 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 17:22:02,993 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 17:22:02,993 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:02,998 INFO ]: Computing forward predicates... [2018-06-22 17:22:03,096 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 17:22:03,370 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:03,371 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:04,967 WARN ]: Spent 361.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2018-06-22 17:22:05,233 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2018-06-22 17:22:05,421 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2018-06-22 17:22:06,321 WARN ]: Spent 197.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2018-06-22 17:22:06,353 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 17:22:06,377 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:22:06,377 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 17:22:06,377 INFO ]: Interpolant automaton has 17 states [2018-06-22 17:22:06,377 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 17:22:06,377 INFO ]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2018-06-22 17:22:06,378 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 17:22:07,234 WARN ]: Spent 787.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 151 [2018-06-22 17:22:07,408 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2018-06-22 17:22:08,536 WARN ]: Spent 1.07 s on a formula simplification. DAG size of input: 217 DAG size of output: 136 [2018-06-22 17:22:09,164 WARN ]: Spent 565.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 141 [2018-06-22 17:22:09,720 WARN ]: Spent 496.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 127 [2018-06-22 17:22:09,800 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:22:09,800 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 17:22:09,801 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 17:22:09,801 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 17:22:09,801 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:22:09,802 INFO ]: With dead ends: 19 [2018-06-22 17:22:09,802 INFO ]: Without dead ends: 19 [2018-06-22 17:22:09,802 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2018-06-22 17:22:09,803 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 17:22:09,806 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 17:22:09,806 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 17:22:09,807 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 17:22:09,807 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 17:22:09,807 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:22:09,807 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 17:22:09,807 INFO ]: Interpolant automaton has 17 states. [2018-06-22 17:22:09,807 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 17:22:09,808 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 17:22:09,808 INFO ]: Found error trace [2018-06-22 17:22:09,808 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:22:09,808 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:22:09,808 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 17:22:09,808 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:22:09,808 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:22:09,809 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:09,809 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:22:09,809 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:09,892 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:10,372 WARN ]: Spent 230.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2018-06-22 17:22:10,512 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2018-06-22 17:22:10,636 WARN ]: Spent 114.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2018-06-22 17:22:10,769 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2018-06-22 17:22:11,051 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 17:22:11,051 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:22:11,051 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 17:22:11,057 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 17:22:11,110 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 17:22:11,110 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:11,115 INFO ]: Computing forward predicates... [2018-06-22 17:22:11,131 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:11,132 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:11,139 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 17:22:13,521 WARN ]: Spent 294.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2018-06-22 17:22:14,142 WARN ]: Spent 380.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 45 [2018-06-22 17:22:14,548 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2018-06-22 17:22:17,662 WARN ]: Spent 619.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-06-22 17:22:19,761 WARN ]: Spent 396.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 47 [2018-06-22 17:22:19,961 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 17:22:19,986 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:22:19,986 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 17:22:19,987 INFO ]: Interpolant automaton has 21 states [2018-06-22 17:22:19,987 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 17:22:19,987 INFO ]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2018-06-22 17:22:19,987 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 17:22:20,746 WARN ]: Spent 692.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 164 [2018-06-22 17:22:21,854 WARN ]: Spent 888.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 154 [2018-06-22 17:22:22,840 WARN ]: Spent 925.00 ms on a formula simplification. DAG size of input: 265 DAG size of output: 159 [2018-06-22 17:22:24,033 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 276 DAG size of output: 176 [2018-06-22 17:22:25,085 WARN ]: Spent 855.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 151 [2018-06-22 17:22:25,701 WARN ]: Spent 539.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 136 [2018-06-22 17:22:25,774 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 17:22:25,774 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 17:22:25,775 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 17:22:25,775 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 17:22:25,775 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 17:22:25,776 INFO ]: With dead ends: 23 [2018-06-22 17:22:25,776 INFO ]: Without dead ends: 23 [2018-06-22 17:22:25,776 INFO ]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2018-06-22 17:22:25,776 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 17:22:25,778 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 17:22:25,778 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 17:22:25,779 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 17:22:25,779 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 25 [2018-06-22 17:22:25,779 INFO ]: Finished accepts. word is rejected. [2018-06-22 17:22:25,779 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 17:22:25,779 INFO ]: Interpolant automaton has 21 states. [2018-06-22 17:22:25,779 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 17:22:25,780 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 17:22:25,780 INFO ]: Found error trace [2018-06-22 17:22:25,780 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 17:22:25,780 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 17:22:25,781 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 5 times [2018-06-22 17:22:25,781 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 17:22:25,781 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 17:22:25,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:25,781 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 17:22:25,781 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 17:22:25,920 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:26,812 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2018-06-22 17:22:27,243 WARN ]: Spent 416.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 68 [2018-06-22 17:22:27,485 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2018-06-22 17:22:28,014 WARN ]: Spent 464.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 97 [2018-06-22 17:22:28,318 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 80 [2018-06-22 17:22:28,550 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2018-06-22 17:22:28,914 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 53 [2018-06-22 17:22:29,198 WARN ]: Spent 226.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 51 [2018-06-22 17:22:29,585 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 85 [2018-06-22 17:22:30,072 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 17:22:30,072 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 17:22:30,072 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 17:22:30,078 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 17:22:30,166 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-06-22 17:22:30,167 INFO ]: Conjunction of SSA is unsat [2018-06-22 17:22:30,173 INFO ]: Computing forward predicates... [2018-06-22 17:22:30,210 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 17:22:31,350 WARN ]: Spent 690.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 60 [2018-06-22 17:22:32,591 WARN ]: Spent 995.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 65 [2018-06-22 17:22:34,589 WARN ]: Spent 1.45 s on a formula simplification. DAG size of input: 200 DAG size of output: 67 [2018-06-22 17:22:35,052 WARN ]: Spent 312.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 45 [2018-06-22 17:22:35,492 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2018-06-22 17:22:36,003 WARN ]: Spent 204.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2018-06-22 17:22:37,411 WARN ]: Spent 917.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 44 [2018-06-22 17:22:39,403 WARN ]: Spent 1.38 s on a formula simplification. DAG size of input: 251 DAG size of output: 54 [2018-06-22 17:22:42,437 WARN ]: Spent 1.98 s on a formula simplification. DAG size of input: 317 DAG size of output: 55 [2018-06-22 17:22:42,457 INFO ]: Checked inductivity of 78 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 17:22:42,477 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 17:22:42,477 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-22 17:22:42,477 INFO ]: Interpolant automaton has 28 states [2018-06-22 17:22:42,477 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 17:22:42,478 INFO ]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2018-06-22 17:22:42,478 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. [2018-06-22 17:22:44,936 WARN ]: Spent 2.22 s on a formula simplification. DAG size of input: 404 DAG size of output: 278 [2018-06-22 17:22:45,467 WARN ]: Spent 476.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 61 [2018-06-22 17:22:48,647 WARN ]: Spent 3.04 s on a formula simplification. DAG size of input: 525 DAG size of output: 258 [2018-06-22 17:22:51,263 WARN ]: Spent 2.45 s on a formula simplification. DAG size of input: 537 DAG size of output: 270 [2018-06-22 17:22:53,811 WARN ]: Spent 2.39 s on a formula simplification. DAG size of input: 519 DAG size of output: 262 Received shutdown request... [2018-06-22 17:22:57,350 WARN ]: Removed 3 from assertion stack [2018-06-22 17:22:57,350 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 17:22:57,350 WARN ]: Verification canceled [2018-06-22 17:22:57,353 WARN ]: Timeout [2018-06-22 17:22:57,354 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:22:57 BoogieIcfgContainer [2018-06-22 17:22:57,354 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 17:22:57,354 INFO ]: Toolchain (without parser) took 61867.43 ms. Allocated memory was 309.3 MB in the beginning and 891.8 MB in the end (delta: 582.5 MB). Free memory was 261.7 MB in the beginning and 437.6 MB in the end (delta: -175.9 MB). Peak memory consumption was 671.5 MB. Max. memory is 3.6 GB. [2018-06-22 17:22:57,355 INFO ]: SmtParser took 0.08 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 17:22:57,355 INFO ]: ChcToBoogie took 51.75 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:22:57,356 INFO ]: Boogie Preprocessor took 49.36 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 17:22:57,356 INFO ]: RCFGBuilder took 303.22 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 247.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-22 17:22:57,357 INFO ]: TraceAbstraction took 61452.76 ms. Allocated memory was 309.3 MB in the beginning and 891.8 MB in the end (delta: 582.5 MB). Free memory was 247.7 MB in the beginning and 437.6 MB in the end (delta: -189.8 MB). Peak memory consumption was 657.5 MB. Max. memory is 3.6 GB. [2018-06-22 17:22:57,359 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 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 51.75 ms. Allocated memory is still 309.3 MB. Free memory was 261.7 MB in the beginning and 259.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 49.36 ms. Allocated memory is still 309.3 MB. Free memory was 259.7 MB in the beginning and 258.7 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 303.22 ms. Allocated memory is still 309.3 MB. Free memory was 258.7 MB in the beginning and 247.7 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61452.76 ms. Allocated memory was 309.3 MB in the beginning and 891.8 MB in the end (delta: 582.5 MB). Free memory was 247.7 MB in the beginning and 437.6 MB in the end (delta: -189.8 MB). Peak memory consumption was 657.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (23states) and interpolant automaton (currently 8 states, 28 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 528. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.3s OverallTime, 6 OverallIterations, 7 TraceHistogramMax, 25.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 64 SDtfs, 126 SDslu, 390 SDs, 0 SdLazy, 338 SolverSat, 173 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 183 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 41.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 34.6s InterpolantComputationTime, 227 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 320608 SizeOfPredicates, 315 NumberOfNonLiveVariables, 1756 ConjunctsInSsa, 386 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 83/296 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_17-22-57-368.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_17-22-57-368.csv Completed graceful shutdown