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/ctigar/dillig19.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:16:50,671 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:16:50,675 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:16:50,691 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:16:50,691 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:16:50,692 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:16:50,693 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:16:50,701 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:16:50,714 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:16:50,715 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:16:50,716 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:16:50,716 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:16:50,717 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:16:50,718 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:16:50,719 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:16:50,719 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:16:50,721 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:16:50,728 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:16:50,731 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:16:50,732 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:16:50,733 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:16:50,740 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:16:50,740 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:16:50,740 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:16:50,741 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:16:50,742 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:16:50,743 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:16:50,743 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:16:50,747 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:16:50,747 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:16:50,748 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:16:50,749 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:16:50,749 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:16:50,749 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:16:50,753 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:16:50,753 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:16:50,776 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:16:50,776 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:16:50,777 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:16:50,777 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:16:50,778 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:16:50,778 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:16:50,778 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:16:50,778 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:16:50,778 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:16:50,779 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:16:50,779 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:16:50,780 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:16:50,782 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:16:50,782 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:16:50,830 INFO ]: Repository-Root is: /tmp [2018-06-22 05:16:50,845 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:16:50,852 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:16:50,854 INFO ]: Initializing SmtParser... [2018-06-22 05:16:50,854 INFO ]: SmtParser initialized [2018-06-22 05:16:50,855 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 [2018-06-22 05:16:50,856 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 05:16:50,950 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 unknown [2018-06-22 05:16:51,339 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig19.c.smt2 [2018-06-22 05:16:51,344 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:16:51,351 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:16:51,351 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:16:51,351 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:16:51,351 INFO ]: ChcToBoogie initialized [2018-06-22 05:16:51,355 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,413 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51 Unit [2018-06-22 05:16:51,413 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:16:51,414 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:16:51,414 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:16:51,414 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:16:51,435 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,435 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,443 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,443 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,456 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,457 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,468 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (1/1) ... [2018-06-22 05:16:51,470 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:16:51,471 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:16:51,471 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:16:51,471 INFO ]: RCFGBuilder initialized [2018-06-22 05:16:51,477 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (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 05:16:51,501 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:16:51,501 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:16:51,501 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:16:51,501 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:16:51,501 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:16:51,501 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 05:16:51,710 INFO ]: Using library mode [2018-06-22 05:16:51,711 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:16:51 BoogieIcfgContainer [2018-06-22 05:16:51,711 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:16:51,712 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:16:51,712 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:16:51,716 INFO ]: TraceAbstraction initialized [2018-06-22 05:16:51,716 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:16:51" (1/3) ... [2018-06-22 05:16:51,717 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724090fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:16:51, skipping insertion in model container [2018-06-22 05:16:51,717 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:16:51" (2/3) ... [2018-06-22 05:16:51,717 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724090fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:16:51, skipping insertion in model container [2018-06-22 05:16:51,717 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:16:51" (3/3) ... [2018-06-22 05:16:51,719 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:16:51,729 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:16:51,739 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:16:51,799 INFO ]: Using default assertion order modulation [2018-06-22 05:16:51,799 INFO ]: Interprodecural is true [2018-06-22 05:16:51,799 INFO ]: Hoare is false [2018-06-22 05:16:51,799 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:16:51,799 INFO ]: Backedges is TWOTRACK [2018-06-22 05:16:51,800 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:16:51,800 INFO ]: Difference is false [2018-06-22 05:16:51,800 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:16:51,802 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:16:51,826 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:16:51,838 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:16:51,839 INFO ]: Found error trace [2018-06-22 05:16:51,840 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:16:51,840 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:16:51,846 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 05:16:51,849 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:16:51,849 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:16:51,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:51,904 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:16:51,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:51,963 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:52,034 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:52,042 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:16:52,042 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:16:52,046 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:16:52,069 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:16:52,070 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:16:52,072 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:16:52,166 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:16:52,166 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:16:52,166 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:16:52,168 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:16:52,168 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:16:52,176 INFO ]: With dead ends: 9 [2018-06-22 05:16:52,176 INFO ]: Without dead ends: 9 [2018-06-22 05:16:52,180 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 05:16:52,194 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:16:52,210 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:16:52,211 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:16:52,211 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:16:52,213 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:16:52,213 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:16:52,213 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:16:52,213 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:16:52,213 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:16:52,213 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:16:52,213 INFO ]: Found error trace [2018-06-22 05:16:52,213 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:16:52,213 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:16:52,214 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 05:16:52,214 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:16:52,214 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:16:52,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:52,215 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:16:52,215 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:52,255 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:52,449 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:52,449 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:16:52,449 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 05:16:52,462 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:16:52,516 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:52,527 INFO ]: Computing forward predicates... [2018-06-22 05:16:53,193 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:53,218 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:16:53,218 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:16:53,219 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:16:53,219 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:16:53,219 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:16:53,220 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:16:53,436 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:16:53,436 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:16:53,437 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:16:53,437 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:16:53,437 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:16:53,437 INFO ]: With dead ends: 10 [2018-06-22 05:16:53,437 INFO ]: Without dead ends: 10 [2018-06-22 05:16:53,438 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:16:53,438 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:16:53,439 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:16:53,440 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:16:53,440 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:16:53,440 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:16:53,440 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:16:53,440 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:16:53,440 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:16:53,440 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:16:53,440 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:16:53,440 INFO ]: Found error trace [2018-06-22 05:16:53,440 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:16:53,440 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:16:53,441 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 05:16:53,441 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:16:53,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:16:53,442 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:53,442 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:16:53,442 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:53,530 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:53,935 WARN ]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:16:53,937 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:53,937 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:16:53,937 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) [2018-06-22 05:16:53,950 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:16:54,040 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:16:54,040 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:54,044 INFO ]: Computing forward predicates... [2018-06-22 05:16:56,372 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:56,393 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:16:56,411 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:16:56,411 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:16:56,411 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:16:56,411 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:16:56,411 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:16:56,487 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:16:56,487 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:16:56,489 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:16:56,489 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:16:56,489 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:16:56,489 INFO ]: With dead ends: 12 [2018-06-22 05:16:56,490 INFO ]: Without dead ends: 12 [2018-06-22 05:16:56,490 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:16:56,490 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:16:56,491 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:16:56,491 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:16:56,491 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:16:56,492 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 05:16:56,492 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:16:56,492 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:16:56,492 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:16:56,492 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:16:56,492 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:16:56,492 INFO ]: Found error trace [2018-06-22 05:16:56,492 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:16:56,492 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:16:56,492 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 05:16:56,492 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:16:56,493 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:16:56,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:56,494 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:16:56,494 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:16:56,543 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:56,728 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:16:56,728 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:16:56,728 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 05:16:56,735 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:16:56,814 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:16:56,814 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:16:56,818 INFO ]: Computing forward predicates... [2018-06-22 05:17:01,089 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:17:01,134 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:17:01,134 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:17:01,134 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:17:01,134 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:17:01,134 INFO ]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:17:01,135 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:17:01,851 WARN ]: Spent 570.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 05:17:01,976 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:17:01,976 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:17:01,976 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:17:01,976 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:17:01,976 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:17:01,977 INFO ]: With dead ends: 13 [2018-06-22 05:17:01,977 INFO ]: Without dead ends: 13 [2018-06-22 05:17:01,977 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:17:01,977 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:17:01,979 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:17:01,979 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:17:01,979 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:17:01,979 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:17:01,980 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:17:01,980 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:17:01,980 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:17:01,980 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:17:01,980 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:17:01,980 INFO ]: Found error trace [2018-06-22 05:17:01,980 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:17:01,980 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:17:01,980 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 4 times [2018-06-22 05:17:01,980 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:17:01,980 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:17:01,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:17:01,981 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:17:01,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:17:02,052 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:17:02,454 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2018-06-22 05:17:02,552 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:17:02,552 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:17:02,552 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 05:17:02,560 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:17:02,629 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:17:02,629 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:17:02,633 INFO ]: Computing forward predicates... [2018-06-22 05:17:20,846 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:17:20,873 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:17:20,873 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:17:20,874 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:17:20,874 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:17:20,874 INFO ]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:17:20,874 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:17:21,028 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:17:21,028 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:17:21,028 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:17:21,028 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:17:21,028 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:17:21,029 INFO ]: With dead ends: 14 [2018-06-22 05:17:21,029 INFO ]: Without dead ends: 14 [2018-06-22 05:17:21,029 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:17:21,029 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:17:21,030 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:17:21,030 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:17:21,031 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:17:21,031 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:17:21,031 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:17:21,031 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:17:21,031 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:17:21,031 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:17:21,031 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:17:21,031 INFO ]: Found error trace [2018-06-22 05:17:21,031 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:17:21,032 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:17:21,032 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 5 times [2018-06-22 05:17:21,032 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:17:21,032 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:17:21,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:17:21,032 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:17:21,032 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:17:21,104 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:17:21,350 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:17:21,350 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:17:21,350 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 05:17:21,356 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:17:21,412 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:17:21,413 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:17:21,417 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown