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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 07:30:48,532 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 07:30:48,535 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 07:30:48,548 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 07:30:48,548 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 07:30:48,549 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 07:30:48,551 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 07:30:48,553 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 07:30:48,555 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 07:30:48,555 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 07:30:48,557 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 07:30:48,557 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 07:30:48,558 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 07:30:48,559 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 07:30:48,562 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 07:30:48,563 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 07:30:48,564 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 07:30:48,574 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 07:30:48,576 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 07:30:48,576 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 07:30:48,577 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 07:30:48,582 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 07:30:48,583 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 07:30:48,583 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 07:30:48,584 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 07:30:48,585 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 07:30:48,585 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 07:30:48,587 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 07:30:48,588 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 07:30:48,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 07:30:48,589 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 07:30:48,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 07:30:48,590 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 07:30:48,594 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 07:30:48,595 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 07:30:48,595 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 07:30:48,615 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 07:30:48,615 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 07:30:48,616 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 07:30:48,617 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 07:30:48,618 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 07:30:48,618 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 07:30:48,618 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 07:30:48,619 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 07:30:48,619 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 07:30:48,619 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 07:30:48,619 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 07:30:48,619 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 07:30:48,620 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 07:30:48,620 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 07:30:48,620 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 07:30:48,620 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 07:30:48,620 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 07:30:48,622 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 07:30:48,623 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 07:30:48,672 INFO ]: Repository-Root is: /tmp [2018-06-22 07:30:48,690 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 07:30:48,695 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 07:30:48,696 INFO ]: Initializing SmtParser... [2018-06-22 07:30:48,697 INFO ]: SmtParser initialized [2018-06-22 07:30:48,697 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 [2018-06-22 07:30:48,698 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 07:30:48,791 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 unknown [2018-06-22 07:30:49,110 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3_e3_442_e6_113.smt2 [2018-06-22 07:30:49,115 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 07:30:49,122 INFO ]: Walking toolchain with 4 elements. [2018-06-22 07:30:49,123 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 07:30:49,123 INFO ]: Initializing ChcToBoogie... [2018-06-22 07:30:49,123 INFO ]: ChcToBoogie initialized [2018-06-22 07:30:49,126 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,196 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49 Unit [2018-06-22 07:30:49,196 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 07:30:49,197 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 07:30:49,197 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 07:30:49,197 INFO ]: Boogie Preprocessor initialized [2018-06-22 07:30:49,218 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,218 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,225 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,225 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,228 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,234 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,235 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (1/1) ... [2018-06-22 07:30:49,238 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 07:30:49,239 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 07:30:49,239 INFO ]: Initializing RCFGBuilder... [2018-06-22 07:30:49,239 INFO ]: RCFGBuilder initialized [2018-06-22 07:30:49,245 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (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 07:30:49,260 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 07:30:49,260 INFO ]: Found specification of procedure gotoProc [2018-06-22 07:30:49,260 INFO ]: Found implementation of procedure gotoProc [2018-06-22 07:30:49,260 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 07:30:49,260 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 07:30:49,260 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 07:30:49,533 INFO ]: Using library mode [2018-06-22 07:30:49,534 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:30:49 BoogieIcfgContainer [2018-06-22 07:30:49,534 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 07:30:49,535 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 07:30:49,535 INFO ]: Initializing TraceAbstraction... [2018-06-22 07:30:49,539 INFO ]: TraceAbstraction initialized [2018-06-22 07:30:49,539 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:30:49" (1/3) ... [2018-06-22 07:30:49,540 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ea8efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:30:49, skipping insertion in model container [2018-06-22 07:30:49,540 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:30:49" (2/3) ... [2018-06-22 07:30:49,540 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ea8efe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:30:49, skipping insertion in model container [2018-06-22 07:30:49,540 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:30:49" (3/3) ... [2018-06-22 07:30:49,542 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 07:30:49,552 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 07:30:49,560 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 07:30:49,605 INFO ]: Using default assertion order modulation [2018-06-22 07:30:49,605 INFO ]: Interprodecural is true [2018-06-22 07:30:49,605 INFO ]: Hoare is false [2018-06-22 07:30:49,606 INFO ]: Compute interpolants for FPandBP [2018-06-22 07:30:49,606 INFO ]: Backedges is TWOTRACK [2018-06-22 07:30:49,606 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 07:30:49,606 INFO ]: Difference is false [2018-06-22 07:30:49,606 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 07:30:49,606 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 07:30:49,618 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 07:30:49,627 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 07:30:49,627 INFO ]: Found error trace [2018-06-22 07:30:49,628 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:30:49,628 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:30:49,633 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 07:30:49,634 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:30:49,635 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:30:49,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:49,667 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:30:49,667 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:49,735 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:49,851 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:49,853 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 07:30:49,854 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 07:30:49,855 INFO ]: Interpolant automaton has 3 states [2018-06-22 07:30:49,866 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 07:30:49,866 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 07:30:49,868 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 07:30:49,929 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:30:49,929 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 07:30:49,929 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 07:30:49,930 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 07:30:49,930 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:30:49,939 INFO ]: With dead ends: 9 [2018-06-22 07:30:49,939 INFO ]: Without dead ends: 9 [2018-06-22 07:30:49,940 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 07:30:49,958 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 07:30:49,984 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 07:30:49,985 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 07:30:49,986 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 07:30:49,987 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 07:30:49,987 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:30:49,987 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 07:30:49,987 INFO ]: Interpolant automaton has 3 states. [2018-06-22 07:30:49,987 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 07:30:49,988 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 07:30:49,988 INFO ]: Found error trace [2018-06-22 07:30:49,988 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:30:49,988 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:30:49,988 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 07:30:49,988 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:30:49,988 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:30:49,989 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:49,989 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:30:49,989 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:50,057 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:50,298 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:50,298 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:30:50,298 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-06-22 07:30:50,312 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 07:30:50,396 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:50,406 INFO ]: Computing forward predicates... [2018-06-22 07:30:50,753 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:50,788 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:30:50,788 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 07:30:50,788 INFO ]: Interpolant automaton has 6 states [2018-06-22 07:30:50,789 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 07:30:50,789 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 07:30:50,789 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 07:30:50,924 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:30:50,924 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 07:30:50,925 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 07:30:50,925 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 07:30:50,925 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:30:50,925 INFO ]: With dead ends: 11 [2018-06-22 07:30:50,925 INFO ]: Without dead ends: 11 [2018-06-22 07:30:50,926 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 07:30:50,926 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 07:30:50,927 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 07:30:50,927 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 07:30:50,928 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 07:30:50,928 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 07:30:50,928 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:30:50,928 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 07:30:50,928 INFO ]: Interpolant automaton has 6 states. [2018-06-22 07:30:50,928 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 07:30:50,928 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 07:30:50,928 INFO ]: Found error trace [2018-06-22 07:30:50,928 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:30:50,928 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:30:50,930 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 07:30:50,930 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:30:50,930 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:30:50,931 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:50,931 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:30:50,931 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:51,056 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:51,728 WARN ]: Spent 416.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-06-22 07:30:51,854 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:51,854 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:30:51,854 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 07:30:51,860 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 07:30:51,952 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 07:30:51,952 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:51,958 INFO ]: Computing forward predicates... [2018-06-22 07:30:52,125 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:30:52,682 WARN ]: Spent 454.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-06-22 07:30:52,780 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:30:53,727 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 15 [2018-06-22 07:30:53,750 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:53,783 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:30:53,783 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 07:30:53,783 INFO ]: Interpolant automaton has 10 states [2018-06-22 07:30:53,784 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 07:30:53,784 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 07:30:53,784 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 07:30:54,103 WARN ]: Spent 223.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-06-22 07:30:54,279 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:30:54,279 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 07:30:54,279 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 07:30:54,279 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 07:30:54,279 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:30:54,280 INFO ]: With dead ends: 12 [2018-06-22 07:30:54,280 INFO ]: Without dead ends: 12 [2018-06-22 07:30:54,280 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 07:30:54,280 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 07:30:54,281 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 07:30:54,281 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 07:30:54,281 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 07:30:54,281 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 07:30:54,281 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:30:54,281 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 07:30:54,281 INFO ]: Interpolant automaton has 10 states. [2018-06-22 07:30:54,281 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 07:30:54,281 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 07:30:54,281 INFO ]: Found error trace [2018-06-22 07:30:54,281 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:30:54,282 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:30:54,282 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 07:30:54,282 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:30:54,282 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:30:54,283 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:54,283 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:30:54,283 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:54,340 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:54,905 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:54,905 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:30:54,905 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 07:30:54,910 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 07:30:54,965 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 07:30:54,965 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:54,971 INFO ]: Computing forward predicates... [2018-06-22 07:30:55,518 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:30:55,527 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:30:57,334 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:57,368 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:30:57,368 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 07:30:57,368 INFO ]: Interpolant automaton has 12 states [2018-06-22 07:30:57,369 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 07:30:57,369 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-22 07:30:57,369 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-06-22 07:30:57,581 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 61 [2018-06-22 07:30:57,782 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2018-06-22 07:30:57,897 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:30:57,897 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 07:30:57,899 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 07:30:57,899 INFO ]: Start accepts. Automaton has 12 states. Word has length 11 [2018-06-22 07:30:57,899 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:30:57,899 INFO ]: With dead ends: 13 [2018-06-22 07:30:57,899 INFO ]: Without dead ends: 13 [2018-06-22 07:30:57,900 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-06-22 07:30:57,900 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 07:30:57,901 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 07:30:57,901 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 07:30:57,902 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 07:30:57,902 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 07:30:57,902 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:30:57,902 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 07:30:57,902 INFO ]: Interpolant automaton has 12 states. [2018-06-22 07:30:57,902 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 07:30:57,903 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 07:30:57,903 INFO ]: Found error trace [2018-06-22 07:30:57,903 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:30:57,903 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:30:57,903 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 07:30:57,903 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:30:57,903 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:30:57,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:57,904 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:30:57,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:30:57,989 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:58,343 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-06-22 07:30:58,581 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-06-22 07:30:58,724 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2018-06-22 07:30:58,843 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-06-22 07:30:59,346 WARN ]: Spent 363.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2018-06-22 07:30:59,376 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:30:59,376 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:30:59,376 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 07:30:59,388 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 07:30:59,476 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 07:30:59,476 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:30:59,481 INFO ]: Computing forward predicates... [2018-06-22 07:30:59,546 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:30:59,566 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:01,824 WARN ]: Spent 1.23 s on a formula simplification. DAG size of input: 35 DAG size of output: 20 [2018-06-22 07:31:02,131 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:02,143 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:02,151 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:02,163 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:03,089 WARN ]: Spent 255.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 25 [2018-06-22 07:31:03,768 WARN ]: Spent 124.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 07:31:04,208 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:04,229 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:04,229 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 07:31:04,229 INFO ]: Interpolant automaton has 14 states [2018-06-22 07:31:04,229 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 07:31:04,229 INFO ]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-06-22 07:31:04,229 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 07:31:04,449 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2018-06-22 07:31:05,193 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 74 [2018-06-22 07:31:05,374 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2018-06-22 07:31:05,508 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:05,508 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 07:31:05,509 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 07:31:05,509 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 07:31:05,509 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:05,509 INFO ]: With dead ends: 14 [2018-06-22 07:31:05,509 INFO ]: Without dead ends: 14 [2018-06-22 07:31:05,510 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 07:31:05,510 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 07:31:05,511 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 07:31:05,511 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 07:31:05,511 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 07:31:05,511 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 07:31:05,512 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:05,512 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 07:31:05,512 INFO ]: Interpolant automaton has 14 states. [2018-06-22 07:31:05,512 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 07:31:05,512 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 07:31:05,512 INFO ]: Found error trace [2018-06-22 07:31:05,512 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:05,512 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:05,512 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 07:31:05,512 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:05,512 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:05,513 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:05,513 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:05,513 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:05,625 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:06,245 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2018-06-22 07:31:06,424 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2018-06-22 07:31:06,716 WARN ]: Spent 268.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2018-06-22 07:31:06,730 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:06,730 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:06,730 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 07:31:06,738 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 07:31:06,819 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 07:31:06,819 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:06,825 INFO ]: Computing forward predicates... [2018-06-22 07:31:06,854 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:06,866 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:06,869 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:06,878 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:07,021 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:08,750 WARN ]: Spent 300.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2018-06-22 07:31:10,060 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2018-06-22 07:31:10,118 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:10,126 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:10,134 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:11,562 WARN ]: Spent 331.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2018-06-22 07:31:11,684 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:11,894 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 27 [2018-06-22 07:31:11,914 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:11,936 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:11,936 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-06-22 07:31:11,936 INFO ]: Interpolant automaton has 16 states [2018-06-22 07:31:11,936 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 07:31:11,936 INFO ]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-06-22 07:31:11,936 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 16 states. [2018-06-22 07:31:12,440 WARN ]: Spent 417.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 111 [2018-06-22 07:31:12,827 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2018-06-22 07:31:13,125 WARN ]: Spent 272.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2018-06-22 07:31:13,423 WARN ]: Spent 271.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 97 [2018-06-22 07:31:13,619 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2018-06-22 07:31:13,731 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:13,731 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 07:31:13,731 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 07:31:13,731 INFO ]: Start accepts. Automaton has 16 states. Word has length 13 [2018-06-22 07:31:13,732 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:13,732 INFO ]: With dead ends: 16 [2018-06-22 07:31:13,732 INFO ]: Without dead ends: 16 [2018-06-22 07:31:13,732 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-06-22 07:31:13,732 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 07:31:13,734 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 07:31:13,734 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 07:31:13,734 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 07:31:13,734 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-06-22 07:31:13,734 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:13,734 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 07:31:13,735 INFO ]: Interpolant automaton has 16 states. [2018-06-22 07:31:13,735 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 07:31:13,735 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 07:31:13,735 INFO ]: Found error trace [2018-06-22 07:31:13,735 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:13,735 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:13,735 INFO ]: Analyzing trace with hash 39881678, now seen corresponding path program 6 times [2018-06-22 07:31:13,735 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:13,735 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:13,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:13,736 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:13,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:13,879 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:14,944 WARN ]: Spent 656.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-06-22 07:31:15,105 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2018-06-22 07:31:15,537 INFO ]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:15,537 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:15,537 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 07:31:15,543 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 07:31:15,662 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 07:31:15,662 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:15,670 INFO ]: Computing forward predicates... [2018-06-22 07:31:15,678 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:16,254 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-06-22 07:31:16,929 WARN ]: Spent 313.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-06-22 07:31:17,687 WARN ]: Spent 396.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2018-06-22 07:31:17,735 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:17,746 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:17,757 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:18,966 WARN ]: Spent 693.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 74 [2018-06-22 07:31:19,067 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,069 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,072 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,075 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,077 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,092 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,094 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,096 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:19,100 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,102 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,106 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:19,115 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,116 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:19,121 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,123 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:19,128 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:19,775 WARN ]: Spent 285.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 35 [2018-06-22 07:31:19,956 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:19,975 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:19,976 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-06-22 07:31:19,976 INFO ]: Interpolant automaton has 19 states [2018-06-22 07:31:19,976 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 07:31:19,976 INFO ]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-06-22 07:31:19,976 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 19 states. [2018-06-22 07:31:20,192 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 67 [2018-06-22 07:31:20,517 WARN ]: Spent 307.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2018-06-22 07:31:21,122 WARN ]: Spent 569.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 120 [2018-06-22 07:31:21,523 WARN ]: Spent 359.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 112 [2018-06-22 07:31:21,996 WARN ]: Spent 422.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 125 [2018-06-22 07:31:22,411 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 122 [2018-06-22 07:31:22,729 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2018-06-22 07:31:22,989 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2018-06-22 07:31:23,221 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2018-06-22 07:31:23,241 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:23,241 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 07:31:23,241 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 07:31:23,242 INFO ]: Start accepts. Automaton has 19 states. Word has length 15 [2018-06-22 07:31:23,242 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:23,242 INFO ]: With dead ends: 13 [2018-06-22 07:31:23,242 INFO ]: Without dead ends: 0 [2018-06-22 07:31:23,242 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-06-22 07:31:23,242 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 07:31:23,242 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 07:31:23,242 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 07:31:23,242 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 07:31:23,243 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-06-22 07:31:23,243 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:23,243 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 07:31:23,243 INFO ]: Interpolant automaton has 19 states. [2018-06-22 07:31:23,243 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 07:31:23,243 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 07:31:23,249 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:31:23 BoogieIcfgContainer [2018-06-22 07:31:23,249 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 07:31:23,250 INFO ]: Toolchain (without parser) took 34134.41 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 257.0 MB in the beginning and 492.8 MB in the end (delta: -235.7 MB). Peak memory consumption was 186.8 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:23,251 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 07:31:23,251 INFO ]: ChcToBoogie took 73.67 ms. Allocated memory is still 305.7 MB. Free memory was 256.0 MB in the beginning and 254.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:23,252 INFO ]: Boogie Preprocessor took 41.83 ms. Allocated memory is still 305.7 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. [2018-06-22 07:31:23,252 INFO ]: RCFGBuilder took 294.94 ms. Allocated memory is still 305.7 MB. Free memory was 253.0 MB in the beginning and 240.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:23,252 INFO ]: TraceAbstraction took 33713.79 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 240.0 MB in the beginning and 492.8 MB in the end (delta: -252.7 MB). Peak memory consumption was 169.8 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:23,255 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.09 ms. Allocated memory is still 305.7 MB. Free memory is still 271.1 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.67 ms. Allocated memory is still 305.7 MB. Free memory was 256.0 MB in the beginning and 254.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.83 ms. Allocated memory is still 305.7 MB. Free memory was 254.0 MB in the beginning and 253.0 MB in the end (delta: 996.2 kB). Peak memory consumption was 996.2 kB. Max. memory is 3.6 GB. * RCFGBuilder took 294.94 ms. Allocated memory is still 305.7 MB. Free memory was 253.0 MB in the beginning and 240.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 33713.79 ms. Allocated memory was 305.7 MB in the beginning and 728.2 MB in the end (delta: 422.6 MB). Free memory was 240.0 MB in the beginning and 492.8 MB in the end (delta: -252.7 MB). Peak memory consumption was 169.8 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. SAFE Result, 33.6s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 7.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 0 SDslu, 238 SDs, 0 SdLazy, 187 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 19.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 24.5s InterpolantComputationTime, 145 NumberOfCodeBlocks, 145 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 132 ConstructedInterpolants, 0 QuantifiedInterpolants, 50799 SizeOfPredicates, 32 NumberOfNonLiveVariables, 2781 ConjunctsInSsa, 693 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 1/178 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/durationThm_3_e3_442_e6_113.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_07-31-23-265.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_3_e3_442_e6_113.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_07-31-23-265.csv Received shutdown request...