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.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 07:31:07,664 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 07:31:07,666 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 07:31:07,677 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 07:31:07,677 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 07:31:07,678 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 07:31:07,680 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 07:31:07,684 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 07:31:07,686 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 07:31:07,687 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 07:31:07,688 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 07:31:07,688 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 07:31:07,689 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 07:31:07,690 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 07:31:07,692 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 07:31:07,693 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 07:31:07,695 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 07:31:07,697 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 07:31:07,698 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 07:31:07,708 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 07:31:07,709 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 07:31:07,712 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 07:31:07,712 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 07:31:07,712 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 07:31:07,713 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 07:31:07,714 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 07:31:07,715 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 07:31:07,715 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 07:31:07,716 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 07:31:07,717 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 07:31:07,717 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 07:31:07,718 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 07:31:07,718 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 07:31:07,719 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 07:31:07,719 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 07:31:07,720 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 07:31:07,733 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 07:31:07,733 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 07:31:07,733 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 07:31:07,733 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 07:31:07,737 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 07:31:07,737 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 07:31:07,737 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 07:31:07,737 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 07:31:07,737 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 07:31:07,738 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 07:31:07,738 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 07:31:07,738 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 07:31:07,738 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 07:31:07,738 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 07:31:07,738 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 07:31:07,739 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 07:31:07,739 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 07:31:07,743 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 07:31:07,743 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 07:31:07,785 INFO ]: Repository-Root is: /tmp [2018-06-22 07:31:07,802 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 07:31:07,810 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 07:31:07,811 INFO ]: Initializing SmtParser... [2018-06-22 07:31:07,811 INFO ]: SmtParser initialized [2018-06-22 07:31:07,812 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3.smt2 [2018-06-22 07:31:07,813 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 07:31:07,906 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3.smt2 unknown [2018-06-22 07:31:08,177 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_3.smt2 [2018-06-22 07:31:08,182 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 07:31:08,188 INFO ]: Walking toolchain with 4 elements. [2018-06-22 07:31:08,188 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 07:31:08,188 INFO ]: Initializing ChcToBoogie... [2018-06-22 07:31:08,188 INFO ]: ChcToBoogie initialized [2018-06-22 07:31:08,191 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,262 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08 Unit [2018-06-22 07:31:08,262 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 07:31:08,263 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 07:31:08,263 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 07:31:08,263 INFO ]: Boogie Preprocessor initialized [2018-06-22 07:31:08,286 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,286 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,293 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,293 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,308 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,309 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,311 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... [2018-06-22 07:31:08,312 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 07:31:08,313 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 07:31:08,313 INFO ]: Initializing RCFGBuilder... [2018-06-22 07:31:08,313 INFO ]: RCFGBuilder initialized [2018-06-22 07:31:08,314 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 07:31:08,347 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 07:31:08,347 INFO ]: Found specification of procedure gotoProc [2018-06-22 07:31:08,347 INFO ]: Found implementation of procedure gotoProc [2018-06-22 07:31:08,347 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 07:31:08,347 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 07:31:08,348 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 07:31:08,634 INFO ]: Using library mode [2018-06-22 07:31:08,634 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:31:08 BoogieIcfgContainer [2018-06-22 07:31:08,634 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 07:31:08,636 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 07:31:08,636 INFO ]: Initializing TraceAbstraction... [2018-06-22 07:31:08,639 INFO ]: TraceAbstraction initialized [2018-06-22 07:31:08,639 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:31:08" (1/3) ... [2018-06-22 07:31:08,640 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6179566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:31:08, skipping insertion in model container [2018-06-22 07:31:08,640 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:31:08" (2/3) ... [2018-06-22 07:31:08,641 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6179566f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:31:08, skipping insertion in model container [2018-06-22 07:31:08,641 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:31:08" (3/3) ... [2018-06-22 07:31:08,642 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 07:31:08,651 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 07:31:08,665 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 07:31:08,720 INFO ]: Using default assertion order modulation [2018-06-22 07:31:08,721 INFO ]: Interprodecural is true [2018-06-22 07:31:08,721 INFO ]: Hoare is false [2018-06-22 07:31:08,721 INFO ]: Compute interpolants for FPandBP [2018-06-22 07:31:08,721 INFO ]: Backedges is TWOTRACK [2018-06-22 07:31:08,721 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 07:31:08,721 INFO ]: Difference is false [2018-06-22 07:31:08,721 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 07:31:08,721 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 07:31:08,737 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 07:31:08,749 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 07:31:08,749 INFO ]: Found error trace [2018-06-22 07:31:08,749 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:08,752 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:08,758 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 07:31:08,760 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:08,760 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:08,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:08,800 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:08,800 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:08,859 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:09,016 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:09,018 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 07:31:09,018 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 07:31:09,019 INFO ]: Interpolant automaton has 3 states [2018-06-22 07:31:09,030 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 07:31:09,030 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 07:31:09,032 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 07:31:09,095 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:09,095 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 07:31:09,096 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 07:31:09,097 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 07:31:09,097 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:09,103 INFO ]: With dead ends: 9 [2018-06-22 07:31:09,103 INFO ]: Without dead ends: 9 [2018-06-22 07:31:09,105 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 07:31:09,118 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 07:31:09,145 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 07:31:09,146 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 07:31:09,146 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 07:31:09,147 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 07:31:09,147 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:09,147 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 07:31:09,147 INFO ]: Interpolant automaton has 3 states. [2018-06-22 07:31:09,147 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 07:31:09,147 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 07:31:09,147 INFO ]: Found error trace [2018-06-22 07:31:09,148 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:09,148 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:09,148 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 07:31:09,148 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:09,148 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:09,149 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:09,149 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:09,149 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:09,191 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:09,297 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:09,297 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:09,297 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 07:31:09,304 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:09,386 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:09,398 INFO ]: Computing forward predicates... [2018-06-22 07:31:09,633 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:09,653 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:09,653 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 07:31:09,654 INFO ]: Interpolant automaton has 6 states [2018-06-22 07:31:09,654 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 07:31:09,654 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 07:31:09,654 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 07:31:09,692 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:09,692 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 07:31:09,692 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 07:31:09,692 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 07:31:09,692 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:09,693 INFO ]: With dead ends: 11 [2018-06-22 07:31:09,693 INFO ]: Without dead ends: 11 [2018-06-22 07:31:09,693 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 07:31:09,694 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 07:31:09,694 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 07:31:09,694 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 07:31:09,695 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 07:31:09,695 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 07:31:09,695 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:09,695 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 07:31:09,695 INFO ]: Interpolant automaton has 6 states. [2018-06-22 07:31:09,695 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 07:31:09,695 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 07:31:09,695 INFO ]: Found error trace [2018-06-22 07:31:09,695 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:09,695 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:09,695 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 07:31:09,695 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:09,695 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:09,696 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:09,696 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 07:31:09,696 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:09,823 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:10,112 WARN ]: Spent 141.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-06-22 07:31:10,575 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2018-06-22 07:31:10,729 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2018-06-22 07:31:10,803 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:10,803 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:10,803 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 07:31:10,814 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 07:31:10,903 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 07:31:10,903 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:10,909 INFO ]: Computing forward predicates... [2018-06-22 07:31:11,209 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:11,673 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:11,931 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 21 [2018-06-22 07:31:12,572 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:12,596 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:12,596 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 07:31:12,596 INFO ]: Interpolant automaton has 10 states [2018-06-22 07:31:12,596 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 07:31:12,596 INFO ]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 07:31:12,596 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 07:31:12,903 WARN ]: Spent 215.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2018-06-22 07:31:13,075 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2018-06-22 07:31:13,215 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:13,215 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 07:31:13,215 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 07:31:13,215 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 07:31:13,215 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:13,215 INFO ]: With dead ends: 12 [2018-06-22 07:31:13,215 INFO ]: Without dead ends: 12 [2018-06-22 07:31:13,216 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2018-06-22 07:31:13,216 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 07:31:13,217 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 07:31:13,217 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 07:31:13,218 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 07:31:13,218 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 07:31:13,218 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:13,218 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 07:31:13,218 INFO ]: Interpolant automaton has 10 states. [2018-06-22 07:31:13,218 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 07:31:13,218 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 07:31:13,218 INFO ]: Found error trace [2018-06-22 07:31:13,218 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:13,218 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:13,218 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 07:31:13,219 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:13,219 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:13,219 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:13,220 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:13,220 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:13,278 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:13,599 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-06-22 07:31:13,773 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2018-06-22 07:31:13,979 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:13,979 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:13,979 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 07:31:13,990 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 07:31:14,089 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 07:31:14,089 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:14,095 INFO ]: Computing forward predicates... [2018-06-22 07:31:14,737 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:14,745 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:16,182 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:16,216 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:16,216 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-06-22 07:31:16,216 INFO ]: Interpolant automaton has 12 states [2018-06-22 07:31:16,216 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 07:31:16,216 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-22 07:31:16,217 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 12 states. [2018-06-22 07:31:16,429 WARN ]: Spent 170.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 61 [2018-06-22 07:31:16,643 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 65 [2018-06-22 07:31:16,768 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:16,768 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 07:31:16,770 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 07:31:16,771 INFO ]: Start accepts. Automaton has 12 states. Word has length 11 [2018-06-22 07:31:16,771 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:16,771 INFO ]: With dead ends: 13 [2018-06-22 07:31:16,771 INFO ]: Without dead ends: 13 [2018-06-22 07:31:16,771 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2018-06-22 07:31:16,771 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 07:31:16,773 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 07:31:16,773 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 07:31:16,773 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 07:31:16,773 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 07:31:16,773 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:16,773 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 07:31:16,773 INFO ]: Interpolant automaton has 12 states. [2018-06-22 07:31:16,773 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 07:31:16,774 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 07:31:16,774 INFO ]: Found error trace [2018-06-22 07:31:16,774 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:16,774 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:16,774 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 07:31:16,774 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:16,774 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:16,775 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:16,775 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:16,775 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:16,848 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:17,201 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-06-22 07:31:17,389 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2018-06-22 07:31:17,535 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2018-06-22 07:31:17,651 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2018-06-22 07:31:17,934 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2018-06-22 07:31:17,964 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:18,002 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:18,002 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 07:31:18,009 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 07:31:18,081 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 07:31:18,082 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:18,088 INFO ]: Computing forward predicates... [2018-06-22 07:31:18,197 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:18,217 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:18,734 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:18,744 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:18,750 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:18,759 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:19,361 WARN ]: Spent 251.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 25 [2018-06-22 07:31:21,611 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2018-06-22 07:31:22,667 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:22,687 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:22,687 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 07:31:22,687 INFO ]: Interpolant automaton has 14 states [2018-06-22 07:31:22,687 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 07:31:22,687 INFO ]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2018-06-22 07:31:22,688 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 07:31:22,905 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 48 [2018-06-22 07:31:23,210 WARN ]: Spent 288.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 74 [2018-06-22 07:31:23,384 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2018-06-22 07:31:23,506 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2018-06-22 07:31:23,521 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:23,521 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 07:31:23,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 07:31:23,522 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 07:31:23,523 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:23,523 INFO ]: With dead ends: 14 [2018-06-22 07:31:23,523 INFO ]: Without dead ends: 14 [2018-06-22 07:31:23,523 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2018-06-22 07:31:23,523 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 07:31:23,525 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 07:31:23,525 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 07:31:23,525 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 07:31:23,525 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 07:31:23,525 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:23,525 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 07:31:23,525 INFO ]: Interpolant automaton has 14 states. [2018-06-22 07:31:23,525 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 07:31:23,525 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 07:31:23,526 INFO ]: Found error trace [2018-06-22 07:31:23,526 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:23,526 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:23,526 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 07:31:23,526 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:23,526 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:23,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:23,526 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:23,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:23,655 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:23,975 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 7 [2018-06-22 07:31:24,329 WARN ]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2018-06-22 07:31:24,513 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2018-06-22 07:31:24,813 WARN ]: Spent 270.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 42 [2018-06-22 07:31:24,826 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:24,826 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:24,826 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 07:31:24,836 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 07:31:24,939 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 07:31:24,939 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:24,945 INFO ]: Computing forward predicates... [2018-06-22 07:31:24,974 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:24,984 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:24,987 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:24,997 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:25,262 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:27,206 WARN ]: Spent 1.36 s on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2018-06-22 07:31:28,371 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 49 [2018-06-22 07:31:29,261 WARN ]: Spent 325.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2018-06-22 07:31:29,323 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:29,332 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:29,340 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:31,493 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 50 [2018-06-22 07:31:31,569 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:31,836 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 27 [2018-06-22 07:31:31,856 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:31,885 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:31,885 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2018-06-22 07:31:31,886 INFO ]: Interpolant automaton has 16 states [2018-06-22 07:31:31,886 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 07:31:31,886 INFO ]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2018-06-22 07:31:31,886 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 16 states. [2018-06-22 07:31:32,439 WARN ]: Spent 472.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 111 [2018-06-22 07:31:32,823 WARN ]: Spent 365.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 111 [2018-06-22 07:31:33,129 WARN ]: Spent 279.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 85 [2018-06-22 07:31:33,406 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 97 [2018-06-22 07:31:33,601 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 77 [2018-06-22 07:31:33,715 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:33,715 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-22 07:31:33,715 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 07:31:33,715 INFO ]: Start accepts. Automaton has 16 states. Word has length 13 [2018-06-22 07:31:33,715 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:33,716 INFO ]: With dead ends: 16 [2018-06-22 07:31:33,716 INFO ]: Without dead ends: 16 [2018-06-22 07:31:33,716 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2018-06-22 07:31:33,716 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-22 07:31:33,718 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-22 07:31:33,718 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-22 07:31:33,718 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-22 07:31:33,718 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2018-06-22 07:31:33,718 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:33,718 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-22 07:31:33,719 INFO ]: Interpolant automaton has 16 states. [2018-06-22 07:31:33,719 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-22 07:31:33,719 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-22 07:31:33,719 INFO ]: Found error trace [2018-06-22 07:31:33,719 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 07:31:33,719 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 07:31:33,719 INFO ]: Analyzing trace with hash 39881678, now seen corresponding path program 6 times [2018-06-22 07:31:33,719 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 07:31:33,719 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 07:31:33,720 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:33,720 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 07:31:33,720 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 07:31:33,872 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:34,760 WARN ]: Spent 432.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2018-06-22 07:31:34,940 WARN ]: Spent 159.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2018-06-22 07:31:35,389 INFO ]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:35,389 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 07:31:35,389 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 07:31:35,395 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 07:31:35,513 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 07:31:35,513 INFO ]: Conjunction of SSA is unsat [2018-06-22 07:31:35,520 INFO ]: Computing forward predicates... [2018-06-22 07:31:35,527 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:36,212 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2018-06-22 07:31:36,919 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 54 [2018-06-22 07:31:37,701 WARN ]: Spent 409.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 67 [2018-06-22 07:31:37,748 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:37,760 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:37,772 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:39,080 WARN ]: Spent 678.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 74 [2018-06-22 07:31:39,176 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,178 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,180 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,182 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,184 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,186 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,188 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,190 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:39,195 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,198 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,200 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:39,205 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,207 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 07:31:39,214 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,216 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 07:31:39,223 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 07:31:39,867 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 35 [2018-06-22 07:31:40,033 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 07:31:40,053 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 07:31:40,053 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2018-06-22 07:31:40,054 INFO ]: Interpolant automaton has 19 states [2018-06-22 07:31:40,054 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 07:31:40,054 INFO ]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2018-06-22 07:31:40,054 INFO ]: Start difference. First operand 16 states and 16 transitions. Second operand 19 states. [2018-06-22 07:31:40,288 WARN ]: Spent 191.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 67 [2018-06-22 07:31:40,624 WARN ]: Spent 315.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 111 [2018-06-22 07:31:41,250 WARN ]: Spent 587.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 120 [2018-06-22 07:31:41,680 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 112 [2018-06-22 07:31:42,166 WARN ]: Spent 432.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 125 [2018-06-22 07:31:42,549 WARN ]: Spent 332.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 122 [2018-06-22 07:31:42,934 WARN ]: Spent 317.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 99 [2018-06-22 07:31:43,222 WARN ]: Spent 227.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 86 [2018-06-22 07:31:43,462 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2018-06-22 07:31:43,466 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 07:31:43,466 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 07:31:43,467 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 07:31:43,467 INFO ]: Start accepts. Automaton has 19 states. Word has length 15 [2018-06-22 07:31:43,467 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 07:31:43,467 INFO ]: With dead ends: 13 [2018-06-22 07:31:43,467 INFO ]: Without dead ends: 0 [2018-06-22 07:31:43,467 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2018-06-22 07:31:43,467 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 07:31:43,467 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 07:31:43,467 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 07:31:43,467 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 07:31:43,468 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2018-06-22 07:31:43,468 INFO ]: Finished accepts. word is rejected. [2018-06-22 07:31:43,468 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 07:31:43,468 INFO ]: Interpolant automaton has 19 states. [2018-06-22 07:31:43,468 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 07:31:43,468 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 07:31:43,471 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 07:31:43 BoogieIcfgContainer [2018-06-22 07:31:43,472 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 07:31:43,472 INFO ]: Toolchain (without parser) took 35290.02 ms. Allocated memory was 309.9 MB in the beginning and 756.0 MB in the end (delta: 446.2 MB). Free memory was 261.2 MB in the beginning and 609.8 MB in the end (delta: -348.6 MB). Peak memory consumption was 97.6 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:43,473 INFO ]: SmtParser took 0.09 ms. Allocated memory is still 309.9 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 07:31:43,473 INFO ]: ChcToBoogie took 74.63 ms. Allocated memory is still 309.9 MB. Free memory was 260.2 MB in the beginning and 258.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:43,474 INFO ]: Boogie Preprocessor took 49.36 ms. Allocated memory is still 309.9 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:43,474 INFO ]: RCFGBuilder took 321.44 ms. Allocated memory is still 309.9 MB. Free memory was 257.2 MB in the beginning and 245.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:43,474 INFO ]: TraceAbstraction took 34835.42 ms. Allocated memory was 309.9 MB in the beginning and 756.0 MB in the end (delta: 446.2 MB). Free memory was 244.2 MB in the beginning and 609.8 MB in the end (delta: -365.7 MB). Peak memory consumption was 80.5 MB. Max. memory is 3.6 GB. [2018-06-22 07:31:43,477 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 309.9 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 74.63 ms. Allocated memory is still 309.9 MB. Free memory was 260.2 MB in the beginning and 258.2 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 309.9 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 321.44 ms. Allocated memory is still 309.9 MB. Free memory was 257.2 MB in the beginning and 245.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 34835.42 ms. Allocated memory was 309.9 MB in the beginning and 756.0 MB in the end (delta: 446.2 MB). Free memory was 244.2 MB in the beginning and 609.8 MB in the end (delta: -365.7 MB). Peak memory consumption was 80.5 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, 34.7s OverallTime, 7 OverallIterations, 8 TraceHistogramMax, 7.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 45 SDtfs, 0 SDslu, 238 SDs, 0 SdLazy, 187 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 137 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 18.5s 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, 25.7s 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.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_07-31-43-487.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_3.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_07-31-43-487.csv Received shutdown request...