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/seq4.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:53:16,692 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:53:16,695 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:53:16,707 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:53:16,708 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:53:16,709 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:53:16,710 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:53:16,714 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:53:16,716 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:53:16,717 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:53:16,719 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:53:16,720 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:53:16,721 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:53:16,722 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:53:16,723 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:53:16,724 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:53:16,725 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:53:16,728 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:53:16,729 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:53:16,730 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:53:16,732 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:53:16,734 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:53:16,735 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:53:16,735 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:53:16,736 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:53:16,737 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:53:16,738 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:53:16,739 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:53:16,740 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:53:16,740 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:53:16,741 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:53:16,742 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:53:16,742 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:53:16,743 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:53:16,744 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:53:16,744 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:53:16,758 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:53:16,758 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:53:16,759 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:53:16,759 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:53:16,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:53:16,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:53:16,761 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:53:16,761 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:53:16,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:53:16,761 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:53:16,761 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:53:16,762 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:53:16,762 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:53:16,762 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:53:16,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:53:16,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:53:16,763 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:53:16,764 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:53:16,764 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:53:16,820 INFO ]: Repository-Root is: /tmp [2018-06-22 05:53:16,842 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:53:16,848 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:53:16,850 INFO ]: Initializing SmtParser... [2018-06-22 05:53:16,851 INFO ]: SmtParser initialized [2018-06-22 05:53:16,851 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 [2018-06-22 05:53:16,853 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 05:53:16,948 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 unknown [2018-06-22 05:53:17,248 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/seq4.c.smt2 [2018-06-22 05:53:17,254 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:53:17,260 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:53:17,260 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:53:17,260 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:53:17,260 INFO ]: ChcToBoogie initialized [2018-06-22 05:53:17,264 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,324 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17 Unit [2018-06-22 05:53:17,325 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:53:17,325 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:53:17,325 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:53:17,325 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:53:17,347 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,348 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,356 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,356 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,361 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,363 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,365 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... [2018-06-22 05:53:17,368 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:53:17,368 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:53:17,368 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:53:17,369 INFO ]: RCFGBuilder initialized [2018-06-22 05:53:17,369 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:53:17,401 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:53:17,401 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:53:17,401 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:53:17,401 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:53:17,401 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:53:17,401 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 05:53:17,693 INFO ]: Using library mode [2018-06-22 05:53:17,694 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:53:17 BoogieIcfgContainer [2018-06-22 05:53:17,694 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:53:17,702 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:53:17,702 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:53:17,706 INFO ]: TraceAbstraction initialized [2018-06-22 05:53:17,707 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:53:17" (1/3) ... [2018-06-22 05:53:17,708 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188fb1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:53:17, skipping insertion in model container [2018-06-22 05:53:17,708 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:53:17" (2/3) ... [2018-06-22 05:53:17,708 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@188fb1ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:53:17, skipping insertion in model container [2018-06-22 05:53:17,708 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:53:17" (3/3) ... [2018-06-22 05:53:17,710 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:53:17,725 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:53:17,732 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:53:17,793 INFO ]: Using default assertion order modulation [2018-06-22 05:53:17,794 INFO ]: Interprodecural is true [2018-06-22 05:53:17,794 INFO ]: Hoare is false [2018-06-22 05:53:17,794 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:53:17,794 INFO ]: Backedges is TWOTRACK [2018-06-22 05:53:17,794 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:53:17,794 INFO ]: Difference is false [2018-06-22 05:53:17,794 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:53:17,794 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:53:17,808 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:53:17,820 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:53:17,820 INFO ]: Found error trace [2018-06-22 05:53:17,821 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:17,821 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:17,825 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:53:17,827 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:17,827 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:17,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:17,859 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:53:17,859 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:17,914 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:18,011 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:18,015 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:53:18,015 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:53:18,017 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:53:18,029 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:53:18,029 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:53:18,032 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:53:18,102 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:18,102 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:53:18,103 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:53:18,104 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:53:18,105 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:18,114 INFO ]: With dead ends: 9 [2018-06-22 05:53:18,114 INFO ]: Without dead ends: 9 [2018-06-22 05:53:18,116 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 05:53:18,133 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:53:18,155 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:53:18,157 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:53:18,157 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:53:18,159 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:53:18,159 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:18,159 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:53:18,159 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:53:18,159 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:53:18,159 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:53:18,159 INFO ]: Found error trace [2018-06-22 05:53:18,159 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:18,159 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:18,160 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:53:18,160 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:18,160 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:18,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:18,161 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:53:18,161 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:18,231 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:18,440 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:18,440 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:18,440 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 05:53:18,448 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:53:18,517 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:18,530 INFO ]: Computing forward predicates... [2018-06-22 05:53:18,812 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:18,835 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:18,835 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-22 05:53:18,836 INFO ]: Interpolant automaton has 4 states [2018-06-22 05:53:18,836 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 05:53:18,836 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-22 05:53:18,836 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2018-06-22 05:53:18,923 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:18,923 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:53:18,924 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 05:53:18,924 INFO ]: Start accepts. Automaton has 4 states. Word has length 8 [2018-06-22 05:53:18,924 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:18,924 INFO ]: With dead ends: 10 [2018-06-22 05:53:18,924 INFO ]: Without dead ends: 10 [2018-06-22 05:53:18,925 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 [2018-06-22 05:53:18,925 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:53:18,927 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:53:18,927 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:53:18,927 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:53:18,927 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:53:18,927 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:18,927 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:53:18,927 INFO ]: Interpolant automaton has 4 states. [2018-06-22 05:53:18,927 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:53:18,928 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:53:18,928 INFO ]: Found error trace [2018-06-22 05:53:18,930 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:18,930 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:18,930 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:53:18,930 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:18,930 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:18,931 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:18,931 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:53:18,931 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:18,996 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:19,200 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:19,430 WARN ]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:19,431 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:19,431 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:19,431 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:53:19,437 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:53:19,508 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:53:19,508 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:19,512 INFO ]: Computing forward predicates... [2018-06-22 05:53:21,436 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:21,456 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:21,456 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:53:21,456 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:53:21,457 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:53:21,457 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:53:21,457 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:53:21,584 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:21,584 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:53:21,585 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:53:21,585 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:53:21,585 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:21,585 INFO ]: With dead ends: 11 [2018-06-22 05:53:21,585 INFO ]: Without dead ends: 11 [2018-06-22 05:53:21,585 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:53:21,585 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:53:21,586 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:53:21,586 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:53:21,587 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:53:21,587 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:53:21,587 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:21,587 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:53:21,587 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:53:21,587 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:53:21,587 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:53:21,587 INFO ]: Found error trace [2018-06-22 05:53:21,587 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:21,587 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:21,587 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:53:21,588 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:21,588 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:21,589 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:21,589 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:53:21,589 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:21,635 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:21,807 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:21,807 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:21,807 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 05:53:21,814 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:53:21,871 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:53:21,871 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:21,874 INFO ]: Computing forward predicates... [2018-06-22 05:53:27,498 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:27,535 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:27,535 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:53:27,536 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:53:27,536 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:53:27,536 INFO ]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:53:27,536 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:53:27,711 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:28,257 WARN ]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 05:53:29,211 WARN ]: Spent 763.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-22 05:53:29,213 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:29,213 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:53:29,213 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:53:29,213 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:53:29,213 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:29,213 INFO ]: With dead ends: 12 [2018-06-22 05:53:29,213 INFO ]: Without dead ends: 12 [2018-06-22 05:53:29,214 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2018-06-22 05:53:29,214 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:53:29,215 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:53:29,215 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:53:29,215 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:53:29,216 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:53:29,216 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:29,219 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:53:29,219 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:53:29,219 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:53:29,219 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:53:29,219 INFO ]: Found error trace [2018-06-22 05:53:29,219 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:29,220 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:29,220 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:53:29,220 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:29,220 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:29,220 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:29,221 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:53:29,221 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:29,302 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:29,891 WARN ]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 05:53:30,437 WARN ]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 05:53:30,676 WARN ]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:30,756 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:30,756 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:30,756 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 05:53:30,763 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:53:30,830 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:53:30,830 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:30,834 INFO ]: Computing forward predicates... [2018-06-22 05:53:32,478 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:53:33,964 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:33,984 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:33,984 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2018-06-22 05:53:33,984 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:53:33,985 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:53:33,986 INFO ]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:53:33,986 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 8 states. [2018-06-22 05:53:34,200 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:34,200 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:53:34,200 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:53:34,200 INFO ]: Start accepts. Automaton has 8 states. Word has length 11 [2018-06-22 05:53:34,200 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:34,201 INFO ]: With dead ends: 13 [2018-06-22 05:53:34,201 INFO ]: Without dead ends: 13 [2018-06-22 05:53:34,201 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2018-06-22 05:53:34,201 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:53:34,202 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:53:34,203 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:53:34,203 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:53:34,203 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:53:34,203 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:34,203 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:53:34,203 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:53:34,203 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:53:34,203 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:53:34,203 INFO ]: Found error trace [2018-06-22 05:53:34,203 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:34,204 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:34,204 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:53:34,204 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:34,204 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:34,204 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:34,204 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:53:34,204 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:34,278 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:35,208 WARN ]: Spent 659.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 05:53:35,706 WARN ]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:53:36,231 WARN ]: Spent 430.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 05:53:36,488 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:36,777 WARN ]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:53:36,778 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:36,778 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:36,778 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) [2018-06-22 05:53:36,795 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:53:36,910 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:53:36,910 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:36,915 INFO ]: Computing forward predicates... [2018-06-22 05:53:37,288 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,447 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,523 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,578 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,651 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,717 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,774 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,838 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,899 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:53:38,955 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:53:38,995 WARN ]: Simplifying disjunction of 6400 conjuctions. This might take some time... [2018-06-22 05:53:41,288 INFO ]: Simplified to disjunction of 3328 conjuctions. [2018-06-22 05:53:49,338 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:49,359 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:53:49,359 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:53:49,360 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:53:49,360 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:53:49,360 INFO ]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:53:49,360 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:53:49,632 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:53:49,632 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:53:49,632 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:53:49,633 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:53:49,633 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:53:49,633 INFO ]: With dead ends: 14 [2018-06-22 05:53:49,633 INFO ]: Without dead ends: 14 [2018-06-22 05:53:49,633 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:53:49,634 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:53:49,634 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:53:49,635 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:53:49,635 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:53:49,635 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:53:49,635 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:53:49,635 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:53:49,635 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:53:49,635 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:53:49,635 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:53:49,635 INFO ]: Found error trace [2018-06-22 05:53:49,635 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:53:49,635 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:53:49,635 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:53:49,635 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:53:49,635 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:53:49,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:49,636 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:53:49,636 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:53:49,712 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:50,047 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:53:50,047 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:53:50,047 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:53:50,068 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:53:50,160 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:53:50,160 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:53:50,164 INFO ]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown