java -Xss4m -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/NetBSD_loop.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 13:23:57,665 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 13:23:57,668 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 13:23:57,681 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 13:23:57,681 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 13:23:57,684 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 13:23:57,685 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 13:23:57,687 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 13:23:57,689 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 13:23:57,690 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 13:23:57,691 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 13:23:57,692 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 13:23:57,692 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 13:23:57,693 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 13:23:57,694 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 13:23:57,695 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 13:23:57,699 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 13:23:57,709 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 13:23:57,710 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 13:23:57,711 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 13:23:57,712 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 13:23:57,714 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 13:23:57,718 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 13:23:57,718 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 13:23:57,719 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 13:23:57,719 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 13:23:57,720 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 13:23:57,720 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 13:23:57,721 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 13:23:57,721 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 13:23:57,725 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 13:23:57,726 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 13:23:57,726 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 13:23:57,726 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 13:23:57,727 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 13:23:57,727 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 13:23:57,751 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 13:23:57,751 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 13:23:57,752 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 13:23:57,752 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 13:23:57,753 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 13:23:57,753 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 13:23:57,753 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 13:23:57,753 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 13:23:57,754 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 13:23:57,756 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 13:23:57,757 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 13:23:57,757 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 13:23:57,757 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 13:23:57,757 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 13:23:57,757 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 13:23:57,758 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 13:23:57,761 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 13:23:57,762 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 13:23:57,812 INFO ]: Repository-Root is: /tmp [2018-06-25 13:23:57,833 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 13:23:57,837 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 13:23:57,838 INFO ]: Initializing SmtParser... [2018-06-25 13:23:57,838 INFO ]: SmtParser initialized [2018-06-25 13:23:57,839 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop.c.smt2 [2018-06-25 13:23:57,841 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 [2018-06-25 13:23:57,932 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop.c.smt2 unknown [2018-06-25 13:23:58,225 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/NetBSD_loop.c.smt2 [2018-06-25 13:23:58,229 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 13:23:58,239 INFO ]: Walking toolchain with 4 elements. [2018-06-25 13:23:58,240 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 13:23:58,240 INFO ]: Initializing ChcToBoogie... [2018-06-25 13:23:58,240 INFO ]: ChcToBoogie initialized [2018-06-25 13:23:58,243 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,301 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58 Unit [2018-06-25 13:23:58,301 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 13:23:58,302 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 13:23:58,302 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 13:23:58,302 INFO ]: Boogie Preprocessor initialized [2018-06-25 13:23:58,323 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,323 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,331 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,331 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,347 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,348 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,350 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (1/1) ... [2018-06-25 13:23:58,352 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 13:23:58,352 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 13:23:58,352 INFO ]: Initializing RCFGBuilder... [2018-06-25 13:23:58,352 INFO ]: RCFGBuilder initialized [2018-06-25 13:23:58,362 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (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) [2018-06-25 13:23:58,384 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 13:23:58,384 INFO ]: Found specification of procedure gotoProc [2018-06-25 13:23:58,384 INFO ]: Found implementation of procedure gotoProc [2018-06-25 13:23:58,384 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 13:23:58,384 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 13:23:58,384 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 [2018-06-25 13:23:58,657 INFO ]: Using library mode [2018-06-25 13:23:58,657 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:23:58 BoogieIcfgContainer [2018-06-25 13:23:58,657 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 13:23:58,667 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 13:23:58,667 INFO ]: Initializing TraceAbstraction... [2018-06-25 13:23:58,670 INFO ]: TraceAbstraction initialized [2018-06-25 13:23:58,671 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 01:23:58" (1/3) ... [2018-06-25 13:23:58,672 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182cf704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 01:23:58, skipping insertion in model container [2018-06-25 13:23:58,672 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 01:23:58" (2/3) ... [2018-06-25 13:23:58,672 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182cf704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 01:23:58, skipping insertion in model container [2018-06-25 13:23:58,672 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 01:23:58" (3/3) ... [2018-06-25 13:23:58,674 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 13:23:58,683 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 13:23:58,691 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 13:23:58,734 INFO ]: Using default assertion order modulation [2018-06-25 13:23:58,735 INFO ]: Interprodecural is true [2018-06-25 13:23:58,735 INFO ]: Hoare is false [2018-06-25 13:23:58,735 INFO ]: Compute interpolants for FPandBP [2018-06-25 13:23:58,735 INFO ]: Backedges is TWOTRACK [2018-06-25 13:23:58,735 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 13:23:58,735 INFO ]: Difference is false [2018-06-25 13:23:58,735 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 13:23:58,735 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 13:23:58,749 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 13:23:58,759 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 13:23:58,759 INFO ]: Found error trace [2018-06-25 13:23:58,760 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:23:58,761 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:23:58,765 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 13:23:58,767 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:23:58,768 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:23:58,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:23:58,846 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:23:58,846 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:23:58,906 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:23:58,997 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:23:58,999 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 13:23:58,999 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 13:23:59,001 INFO ]: Interpolant automaton has 3 states [2018-06-25 13:23:59,014 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 13:23:59,014 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 13:23:59,016 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 13:23:59,068 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:23:59,068 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 13:23:59,069 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 13:23:59,070 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 13:23:59,070 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:23:59,081 INFO ]: With dead ends: 9 [2018-06-25 13:23:59,081 INFO ]: Without dead ends: 9 [2018-06-25 13:23:59,083 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 [2018-06-25 13:23:59,100 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 13:23:59,124 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 13:23:59,125 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 13:23:59,126 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 13:23:59,127 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 13:23:59,127 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:23:59,127 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 13:23:59,127 INFO ]: Interpolant automaton has 3 states. [2018-06-25 13:23:59,127 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 13:23:59,127 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 13:23:59,127 INFO ]: Found error trace [2018-06-25 13:23:59,127 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:23:59,128 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:23:59,128 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 13:23:59,128 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:23:59,128 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:23:59,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:23:59,129 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:23:59,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:23:59,184 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:23:59,337 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:23:59,337 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:23:59,337 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 [2018-06-25 13:23:59,345 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:23:59,396 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:23:59,406 INFO ]: Computing forward predicates... [2018-06-25 13:24:00,867 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:00,895 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:00,895 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-25 13:24:00,895 INFO ]: Interpolant automaton has 4 states [2018-06-25 13:24:00,895 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-25 13:24:00,895 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 13:24:00,896 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-25 13:24:00,974 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:00,975 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 13:24:00,976 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 13:24:00,976 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-25 13:24:00,976 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:00,977 INFO ]: With dead ends: 10 [2018-06-25 13:24:00,977 INFO ]: Without dead ends: 10 [2018-06-25 13:24:00,977 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-25 13:24:00,978 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 13:24:00,979 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 13:24:00,979 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 13:24:00,979 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 13:24:00,979 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 13:24:00,979 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:00,979 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 13:24:00,979 INFO ]: Interpolant automaton has 4 states. [2018-06-25 13:24:00,979 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 13:24:00,979 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 13:24:00,979 INFO ]: Found error trace [2018-06-25 13:24:00,979 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:00,980 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:00,980 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-25 13:24:00,980 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:00,980 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:00,981 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:00,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:24:00,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:01,077 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:01,469 WARN ]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-25 13:24:01,470 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:01,470 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:01,470 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 [2018-06-25 13:24:01,482 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:24:01,543 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:24:01,543 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:01,546 INFO ]: Computing forward predicates... [2018-06-25 13:24:03,571 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:03,591 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:03,591 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-25 13:24:03,592 INFO ]: Interpolant automaton has 6 states [2018-06-25 13:24:03,592 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-25 13:24:03,592 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-25 13:24:03,592 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-25 13:24:03,639 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:03,639 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-25 13:24:03,640 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 13:24:03,640 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-25 13:24:03,640 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:03,640 INFO ]: With dead ends: 11 [2018-06-25 13:24:03,640 INFO ]: Without dead ends: 11 [2018-06-25 13:24:03,641 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 [2018-06-25 13:24:03,641 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-25 13:24:03,642 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-25 13:24:03,642 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-25 13:24:03,642 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-25 13:24:03,642 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-25 13:24:03,642 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:03,642 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-25 13:24:03,642 INFO ]: Interpolant automaton has 6 states. [2018-06-25 13:24:03,642 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-25 13:24:03,643 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-25 13:24:03,643 INFO ]: Found error trace [2018-06-25 13:24:03,643 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:03,643 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:03,643 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 3 times [2018-06-25 13:24:03,643 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:03,643 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:03,644 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:03,644 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:24:03,644 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:03,681 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:03,832 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:03,832 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:03,832 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 [2018-06-25 13:24:03,838 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 13:24:03,882 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 13:24:03,882 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:03,885 INFO ]: Computing forward predicates... [2018-06-25 13:24:11,312 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:11,334 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:11,334 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-25 13:24:11,334 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:24:11,334 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:24:11,334 INFO ]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:24:11,334 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-25 13:24:11,455 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:11,456 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 13:24:11,456 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-25 13:24:11,456 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-25 13:24:11,456 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:11,456 INFO ]: With dead ends: 12 [2018-06-25 13:24:11,456 INFO ]: Without dead ends: 12 [2018-06-25 13:24:11,457 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:24:11,457 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 13:24:11,458 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 13:24:11,458 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 13:24:11,458 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 13:24:11,458 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-25 13:24:11,458 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:11,458 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 13:24:11,458 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:24:11,459 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 13:24:11,459 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 13:24:11,459 INFO ]: Found error trace [2018-06-25 13:24:11,459 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:11,459 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:11,459 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 4 times [2018-06-25 13:24:11,459 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:11,459 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:11,460 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:11,460 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:24:11,460 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:11,515 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:11,698 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:11,698 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:11,698 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 [2018-06-25 13:24:11,705 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-25 13:24:11,760 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-25 13:24:11,760 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:11,763 INFO ]: Computing forward predicates... [2018-06-25 13:24:13,262 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:25,375 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:25,396 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:25,396 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-25 13:24:25,396 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:24:25,396 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:24:25,396 INFO ]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:24:25,396 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-25 13:24:25,564 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:25,565 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-25 13:24:25,565 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-25 13:24:25,565 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-25 13:24:25,565 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:25,565 INFO ]: With dead ends: 13 [2018-06-25 13:24:25,565 INFO ]: Without dead ends: 13 [2018-06-25 13:24:25,565 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:24:25,565 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-25 13:24:25,566 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-25 13:24:25,566 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-25 13:24:25,567 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-25 13:24:25,567 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-25 13:24:25,567 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:25,567 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-25 13:24:25,567 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:24:25,567 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-25 13:24:25,567 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-25 13:24:25,567 INFO ]: Found error trace [2018-06-25 13:24:25,567 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:25,567 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:25,567 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 5 times [2018-06-25 13:24:25,567 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:25,567 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:25,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:25,568 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:24:25,568 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:25,612 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:25,847 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:25,847 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:25,848 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 [2018-06-25 13:24:25,855 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-25 13:24:25,901 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-25 13:24:25,901 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:25,904 INFO ]: Computing forward predicates... [2018-06-25 13:24:28,225 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:28,810 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:28,830 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:28,830 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-25 13:24:28,830 INFO ]: Interpolant automaton has 8 states [2018-06-25 13:24:28,831 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 13:24:28,831 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-25 13:24:28,831 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 8 states. [2018-06-25 13:24:29,017 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:29,017 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-25 13:24:29,017 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-25 13:24:29,017 INFO ]: Start accepts. Automaton has 8 states. Word has length 12 [2018-06-25 13:24:29,017 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:29,018 INFO ]: With dead ends: 14 [2018-06-25 13:24:29,018 INFO ]: Without dead ends: 14 [2018-06-25 13:24:29,018 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-06-25 13:24:29,018 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-25 13:24:29,019 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-25 13:24:29,019 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-25 13:24:29,020 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-25 13:24:29,020 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-25 13:24:29,020 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:29,020 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-25 13:24:29,020 INFO ]: Interpolant automaton has 8 states. [2018-06-25 13:24:29,020 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-25 13:24:29,020 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-25 13:24:29,020 INFO ]: Found error trace [2018-06-25 13:24:29,020 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:29,021 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:29,021 INFO ]: Analyzing trace with hash 679342766, now seen corresponding path program 6 times [2018-06-25 13:24:29,021 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:29,021 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:29,021 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:29,021 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:24:29,021 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:29,089 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:29,352 WARN ]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-25 13:24:29,801 WARN ]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-25 13:24:29,935 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:29,935 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:29,935 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 [2018-06-25 13:24:29,941 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-25 13:24:30,005 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-25 13:24:30,005 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:30,008 INFO ]: Computing forward predicates... [2018-06-25 13:24:30,381 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:32,630 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:34,209 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:34,240 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:34,240 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2018-06-25 13:24:34,241 INFO ]: Interpolant automaton has 10 states [2018-06-25 13:24:34,241 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-25 13:24:34,241 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-25 13:24:34,241 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2018-06-25 13:24:34,549 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:34,549 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-25 13:24:34,549 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-25 13:24:34,549 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-25 13:24:34,550 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:34,550 INFO ]: With dead ends: 15 [2018-06-25 13:24:34,550 INFO ]: Without dead ends: 15 [2018-06-25 13:24:34,550 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2018-06-25 13:24:34,550 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-25 13:24:34,552 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-25 13:24:34,552 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-25 13:24:34,552 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-25 13:24:34,553 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-25 13:24:34,553 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:34,553 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-25 13:24:34,553 INFO ]: Interpolant automaton has 10 states. [2018-06-25 13:24:34,553 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-25 13:24:34,553 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-25 13:24:34,553 INFO ]: Found error trace [2018-06-25 13:24:34,553 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:34,553 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:34,553 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 7 times [2018-06-25 13:24:34,553 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:34,553 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:34,554 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:34,554 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 13:24:34,554 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:34,614 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:34,937 WARN ]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-25 13:24:35,030 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:35,030 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:35,055 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:24:35,061 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:24:35,113 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:35,116 INFO ]: Computing forward predicates... [2018-06-25 13:24:41,043 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:41,063 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 13:24:41,064 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2018-06-25 13:24:41,064 INFO ]: Interpolant automaton has 12 states [2018-06-25 13:24:41,064 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-25 13:24:41,064 INFO ]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2018-06-25 13:24:41,064 INFO ]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states. [2018-06-25 13:24:41,263 WARN ]: Spent 127.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 11 [2018-06-25 13:24:41,521 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 13:24:41,522 INFO ]: Finished difference Result 16 states and 16 transitions. [2018-06-25 13:24:41,522 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-25 13:24:41,522 INFO ]: Start accepts. Automaton has 12 states. Word has length 14 [2018-06-25 13:24:41,522 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 13:24:41,522 INFO ]: With dead ends: 16 [2018-06-25 13:24:41,522 INFO ]: Without dead ends: 16 [2018-06-25 13:24:41,523 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2018-06-25 13:24:41,523 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-25 13:24:41,524 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-06-25 13:24:41,524 INFO ]: Start removeUnreachable. Operand 16 states. [2018-06-25 13:24:41,524 INFO ]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-06-25 13:24:41,524 INFO ]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-06-25 13:24:41,525 INFO ]: Finished accepts. word is rejected. [2018-06-25 13:24:41,525 INFO ]: Abstraction has 16 states and 16 transitions. [2018-06-25 13:24:41,525 INFO ]: Interpolant automaton has 12 states. [2018-06-25 13:24:41,525 INFO ]: Start isEmpty. Operand 16 states and 16 transitions. [2018-06-25 13:24:41,525 INFO ]: Finished isEmpty. Found accepting run of length 16 [2018-06-25 13:24:41,525 INFO ]: Found error trace [2018-06-25 13:24:41,525 INFO ]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 13:24:41,525 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 13:24:41,525 INFO ]: Analyzing trace with hash 39881678, now seen corresponding path program 8 times [2018-06-25 13:24:41,525 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 13:24:41,525 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 13:24:41,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:41,526 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 13:24:41,526 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 13:24:41,577 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:41,872 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-06-25 13:24:42,096 INFO ]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 13:24:42,097 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 13:24:42,097 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:24:42,102 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 13:24:42,162 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 13:24:42,162 INFO ]: Conjunction of SSA is unsat [2018-06-25 13:24:42,167 INFO ]: Computing forward predicates... [2018-06-25 13:24:43,513 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,518 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,526 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,531 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,534 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,540 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 13:24:43,572 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,580 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,583 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 13:24:43,597 WARN ]: expecting exponential blowup for input size 6 Received shutdown request... [2018-06-25 13:25:01,921 INFO ]: Timeout while computing interpolants [2018-06-25 13:25:02,121 WARN ]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 13:25:02,122 WARN ]: Verification canceled [2018-06-25 13:25:02,125 WARN ]: Timeout [2018-06-25 13:25:02,125 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 01:25:02 BoogieIcfgContainer [2018-06-25 13:25:02,125 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 13:25:02,126 INFO ]: Toolchain (without parser) took 63895.93 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 255.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:25:02,128 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 13:25:02,128 INFO ]: ChcToBoogie took 61.16 ms. Allocated memory is still 303.0 MB. Free memory was 255.6 MB in the beginning and 252.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:25:02,129 INFO ]: Boogie Preprocessor took 50.38 ms. Allocated memory is still 303.0 MB. Free memory was 252.6 MB in the beginning and 251.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-25 13:25:02,129 INFO ]: RCFGBuilder took 304.98 ms. Allocated memory is still 303.0 MB. Free memory was 251.6 MB in the beginning and 240.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. [2018-06-25 13:25:02,130 INFO ]: TraceAbstraction took 63457.80 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-25 13:25:02,133 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 303.0 MB. Free memory is still 268.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 61.16 ms. Allocated memory is still 303.0 MB. Free memory was 255.6 MB in the beginning and 252.6 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 50.38 ms. Allocated memory is still 303.0 MB. Free memory was 252.6 MB in the beginning and 251.6 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 304.98 ms. Allocated memory is still 303.0 MB. Free memory was 251.6 MB in the beginning and 240.6 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 63457.80 ms. Allocated memory was 303.0 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 240.6 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 16 with TraceHistMax 8, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 21 quantified variables from 16 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.3s OverallTime, 9 OverallIterations, 8 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 22 SDslu, 161 SDs, 0 SdLazy, 66 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 53 SyntacticMatches, 26 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=8, 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, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 40.0s InterpolantComputationTime, 161 NumberOfCodeBlocks, 161 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 146 ConstructedInterpolants, 0 QuantifiedInterpolants, 8324 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1449 ConjunctsInSsa, 255 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 0/168 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/NetBSD_loop.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_13-25-02-149.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/NetBSD_loop.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_13-25-02-149.csv Completed graceful shutdown