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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:13:34,700 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:13:34,703 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:13:34,714 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:13:34,714 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:13:34,715 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:13:34,716 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:13:34,720 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:13:34,722 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:13:34,722 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:13:34,724 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:13:34,724 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:13:34,725 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:13:34,726 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:13:34,729 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:13:34,730 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:13:34,731 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:13:34,745 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:13:34,746 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:13:34,747 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:13:34,748 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:13:34,750 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:13:34,751 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:13:34,751 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:13:34,752 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:13:34,752 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:13:34,753 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:13:34,759 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:13:34,760 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:13:34,760 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:13:34,761 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:13:34,761 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:13:34,761 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:13:34,762 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:13:34,763 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:13:34,763 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 15:13:34,781 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:13:34,782 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:13:34,782 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:13:34,782 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:13:34,783 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:13:34,783 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:13:34,784 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:13:34,784 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:13:34,784 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:13:34,784 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:13:34,784 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:13:34,785 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:13:34,785 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:13:34,785 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:13:34,785 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:13:34,785 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:13:34,785 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:13:34,786 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:13:34,786 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:13:34,787 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:13:34,788 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:13:34,818 INFO ]: Repository-Root is: /tmp [2018-06-22 15:13:34,831 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:13:34,835 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:13:34,837 INFO ]: Initializing SmtParser... [2018-06-22 15:13:34,837 INFO ]: SmtParser initialized [2018-06-22 15:13:34,837 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 [2018-06-22 15:13:34,839 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 15:13:34,930 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 unknown [2018-06-22 15:13:35,203 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested1.c.smt2 [2018-06-22 15:13:35,208 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:13:35,213 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:13:35,213 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:13:35,213 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:13:35,213 INFO ]: ChcToBoogie initialized [2018-06-22 15:13:35,217 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,257 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35 Unit [2018-06-22 15:13:35,257 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:13:35,259 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:13:35,259 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:13:35,259 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:13:35,281 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,281 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,290 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,290 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,304 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,306 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,307 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (1/1) ... [2018-06-22 15:13:35,308 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:13:35,315 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:13:35,315 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:13:35,315 INFO ]: RCFGBuilder initialized [2018-06-22 15:13:35,317 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (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 15:13:35,328 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:13:35,328 INFO ]: Found specification of procedure False [2018-06-22 15:13:35,328 INFO ]: Found implementation of procedure False [2018-06-22 15:13:35,328 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:13:35,329 INFO ]: Found specification of procedure state [2018-06-22 15:13:35,329 INFO ]: Found implementation of procedure state [2018-06-22 15:13:35,329 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:13:35,329 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:13:35,329 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:13:35,550 INFO ]: Using library mode [2018-06-22 15:13:35,551 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:13:35 BoogieIcfgContainer [2018-06-22 15:13:35,551 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:13:35,553 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:13:35,553 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:13:35,556 INFO ]: TraceAbstraction initialized [2018-06-22 15:13:35,556 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:13:35" (1/3) ... [2018-06-22 15:13:35,557 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a66e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:13:35, skipping insertion in model container [2018-06-22 15:13:35,558 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:13:35" (2/3) ... [2018-06-22 15:13:35,558 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18a66e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:13:35, skipping insertion in model container [2018-06-22 15:13:35,558 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:13:35" (3/3) ... [2018-06-22 15:13:35,560 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:13:35,569 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:13:35,581 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:13:35,618 INFO ]: Using default assertion order modulation [2018-06-22 15:13:35,618 INFO ]: Interprodecural is true [2018-06-22 15:13:35,618 INFO ]: Hoare is false [2018-06-22 15:13:35,618 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:13:35,618 INFO ]: Backedges is TWOTRACK [2018-06-22 15:13:35,618 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:13:35,618 INFO ]: Difference is false [2018-06-22 15:13:35,618 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:13:35,618 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:13:35,639 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:13:35,652 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:13:35,652 INFO ]: Found error trace [2018-06-22 15:13:35,653 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:35,653 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:35,657 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 15:13:35,658 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:35,659 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:35,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:35,690 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:13:35,690 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:35,712 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:35,807 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:13:35,808 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:13:35,809 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:13:35,810 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:13:35,821 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:13:35,821 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:13:35,823 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:13:35,900 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:35,900 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:13:35,901 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:13:35,902 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:13:35,902 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:35,910 INFO ]: With dead ends: 13 [2018-06-22 15:13:35,910 INFO ]: Without dead ends: 13 [2018-06-22 15:13:35,912 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:13:35,925 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:13:35,945 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:13:35,946 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:13:35,947 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:13:35,948 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:13:35,948 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:35,948 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:13:35,948 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:13:35,948 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:13:35,950 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:13:35,950 INFO ]: Found error trace [2018-06-22 15:13:35,950 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:35,951 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:35,951 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 15:13:35,951 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:35,951 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:35,952 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:35,952 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:13:35,952 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:36,000 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:36,259 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:13:36,259 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:36,259 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 15:13:36,265 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:13:36,297 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:36,305 INFO ]: Computing forward predicates... [2018-06-22 15:13:36,399 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:13:36,431 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:13:36,431 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:13:36,432 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:13:36,432 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:13:36,432 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:13:36,432 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:13:36,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:36,582 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:13:36,583 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:13:36,583 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:13:36,583 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:36,584 INFO ]: With dead ends: 15 [2018-06-22 15:13:36,584 INFO ]: Without dead ends: 15 [2018-06-22 15:13:36,585 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:13:36,585 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:13:36,590 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:13:36,590 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:13:36,590 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:13:36,590 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:13:36,590 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:36,590 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:13:36,590 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:13:36,591 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:13:36,591 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:13:36,591 INFO ]: Found error trace [2018-06-22 15:13:36,591 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:36,591 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:36,591 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 15:13:36,591 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:36,591 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:36,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:36,592 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:13:36,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:36,651 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:37,035 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 12 [2018-06-22 15:13:37,231 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-22 15:13:37,247 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:13:37,247 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:37,247 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 15:13:37,272 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:13:37,299 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:13:37,299 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:37,302 INFO ]: Computing forward predicates... [2018-06-22 15:13:37,540 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 7 [2018-06-22 15:13:38,071 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:13:38,090 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:13:38,090 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 15:13:38,090 INFO ]: Interpolant automaton has 11 states [2018-06-22 15:13:38,091 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 15:13:38,091 INFO ]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-06-22 15:13:38,091 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 15:13:38,407 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-22 15:13:38,542 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:38,542 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:13:38,543 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:13:38,543 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 15:13:38,543 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:38,544 INFO ]: With dead ends: 17 [2018-06-22 15:13:38,544 INFO ]: Without dead ends: 17 [2018-06-22 15:13:38,544 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:13:38,544 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:13:38,547 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:13:38,547 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:13:38,548 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:13:38,548 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:13:38,548 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:38,548 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:13:38,548 INFO ]: Interpolant automaton has 11 states. [2018-06-22 15:13:38,548 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:13:38,549 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:13:38,549 INFO ]: Found error trace [2018-06-22 15:13:38,549 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:38,549 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:38,549 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 15:13:38,549 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:38,549 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:38,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:38,550 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:13:38,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:38,615 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:39,026 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:13:39,027 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:39,027 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 15:13:39,037 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:13:39,090 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:13:39,090 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:39,094 INFO ]: Computing forward predicates... [2018-06-22 15:13:40,028 WARN ]: Spent 723.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 29 [2018-06-22 15:13:40,420 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:13:40,451 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:13:40,451 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 15:13:40,452 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:13:40,452 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:13:40,452 INFO ]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:13:40,452 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 15 states. [2018-06-22 15:13:40,685 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2018-06-22 15:13:40,913 WARN ]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2018-06-22 15:13:41,130 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2018-06-22 15:13:41,164 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:41,164 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:13:41,166 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:13:41,166 INFO ]: Start accepts. Automaton has 15 states. Word has length 21 [2018-06-22 15:13:41,166 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:41,167 INFO ]: With dead ends: 19 [2018-06-22 15:13:41,167 INFO ]: Without dead ends: 19 [2018-06-22 15:13:41,167 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2018-06-22 15:13:41,167 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:13:41,170 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:13:41,170 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:13:41,171 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:13:41,171 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:13:41,171 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:41,171 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:13:41,171 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:13:41,171 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:13:41,171 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:13:41,171 INFO ]: Found error trace [2018-06-22 15:13:41,172 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:41,173 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:41,173 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 15:13:41,173 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:41,173 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:41,174 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:41,174 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:13:41,174 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:41,221 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:41,565 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:13:41,565 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:41,688 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 15:13:41,694 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:13:41,721 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:13:41,721 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:41,725 INFO ]: Computing forward predicates... [2018-06-22 15:13:42,406 WARN ]: Spent 572.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 35 [2018-06-22 15:13:42,620 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 19 [2018-06-22 15:13:44,271 WARN ]: Spent 184.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 2 [2018-06-22 15:13:44,300 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:13:44,331 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:13:44,331 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2018-06-22 15:13:44,331 INFO ]: Interpolant automaton has 17 states [2018-06-22 15:13:44,331 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 15:13:44,331 INFO ]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-06-22 15:13:44,331 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 17 states. [2018-06-22 15:13:45,625 WARN ]: Spent 756.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2018-06-22 15:13:45,931 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2018-06-22 15:13:46,137 WARN ]: Spent 188.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 23 [2018-06-22 15:13:46,322 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2018-06-22 15:13:46,541 WARN ]: Spent 199.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2018-06-22 15:13:46,567 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:46,567 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:13:46,588 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:13:46,588 INFO ]: Start accepts. Automaton has 17 states. Word has length 25 [2018-06-22 15:13:46,588 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:46,589 INFO ]: With dead ends: 21 [2018-06-22 15:13:46,589 INFO ]: Without dead ends: 21 [2018-06-22 15:13:46,589 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2018-06-22 15:13:46,589 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:13:46,592 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:13:46,592 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:13:46,593 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:13:46,593 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:13:46,593 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:46,593 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:13:46,593 INFO ]: Interpolant automaton has 17 states. [2018-06-22 15:13:46,593 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:13:46,594 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:13:46,594 INFO ]: Found error trace [2018-06-22 15:13:46,594 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:46,594 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:46,594 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 15:13:46,594 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:46,594 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:46,595 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:46,595 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:13:46,595 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:46,675 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:47,323 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:13:47,324 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:47,324 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:13:47,329 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:13:47,445 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:13:47,445 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:47,450 INFO ]: Computing forward predicates... [2018-06-22 15:13:50,741 WARN ]: Spent 2.69 s on a formula simplification. DAG size of input: 495 DAG size of output: 48 [2018-06-22 15:13:52,331 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-06-22 15:13:53,014 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:13:53,033 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:13:53,033 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2018-06-22 15:13:53,033 INFO ]: Interpolant automaton has 21 states [2018-06-22 15:13:53,033 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 15:13:53,034 INFO ]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:13:53,034 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 21 states. [2018-06-22 15:13:53,468 WARN ]: Spent 388.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2018-06-22 15:13:53,618 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 19 [2018-06-22 15:13:53,813 WARN ]: Spent 171.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 30 [2018-06-22 15:13:54,055 WARN ]: Spent 218.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 30 [2018-06-22 15:13:54,276 WARN ]: Spent 196.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 29 [2018-06-22 15:13:54,553 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 41 [2018-06-22 15:13:54,586 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:13:54,586 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:13:54,591 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:13:54,591 INFO ]: Start accepts. Automaton has 21 states. Word has length 29 [2018-06-22 15:13:54,591 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:13:54,592 INFO ]: With dead ends: 23 [2018-06-22 15:13:54,592 INFO ]: Without dead ends: 23 [2018-06-22 15:13:54,593 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2018-06-22 15:13:54,593 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:13:54,596 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:13:54,596 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:13:54,597 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:13:54,597 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:13:54,599 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:13:54,599 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:13:54,599 INFO ]: Interpolant automaton has 21 states. [2018-06-22 15:13:54,599 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:13:54,600 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:13:54,600 INFO ]: Found error trace [2018-06-22 15:13:54,600 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:13:54,600 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:13:54,600 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 15:13:54,600 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:13:54,600 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:13:54,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:54,602 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:13:54,602 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:13:54,699 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:55,583 WARN ]: Spent 585.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2018-06-22 15:13:55,884 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2018-06-22 15:13:56,201 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:13:56,201 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:13:56,201 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 15:13:56,206 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:13:56,257 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:13:56,257 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:13:56,261 INFO ]: Computing forward predicates... [2018-06-22 15:13:56,633 WARN ]: Spent 277.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 36 [2018-06-22 15:13:56,924 WARN ]: Spent 216.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 29 [2018-06-22 15:13:57,355 WARN ]: Spent 377.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2018-06-22 15:13:57,859 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 34 [2018-06-22 15:14:00,994 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:14:01,023 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:14:01,023 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2018-06-22 15:14:01,024 INFO ]: Interpolant automaton has 27 states [2018-06-22 15:14:01,024 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 15:14:01,024 INFO ]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2018-06-22 15:14:01,024 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-22 15:14:01,960 WARN ]: Spent 861.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 93 [2018-06-22 15:14:02,199 WARN ]: Spent 174.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 26 [2018-06-22 15:14:02,642 WARN ]: Spent 399.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 41 [2018-06-22 15:14:03,203 WARN ]: Spent 518.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 55 [2018-06-22 15:14:03,716 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 50 [2018-06-22 15:14:04,258 WARN ]: Spent 487.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 52 [2018-06-22 15:14:04,782 WARN ]: Spent 462.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 66 [2018-06-22 15:14:04,871 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:14:04,871 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:14:04,872 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:14:04,872 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-22 15:14:04,872 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:14:04,873 INFO ]: With dead ends: 25 [2018-06-22 15:14:04,873 INFO ]: Without dead ends: 25 [2018-06-22 15:14:04,873 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=186, Invalid=1004, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 15:14:04,873 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:14:04,877 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:14:04,877 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:14:04,878 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:14:04,878 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:14:04,878 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:14:04,878 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:14:04,878 INFO ]: Interpolant automaton has 27 states. [2018-06-22 15:14:04,878 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:14:04,879 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:14:04,879 INFO ]: Found error trace [2018-06-22 15:14:04,879 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:14:04,879 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:14:04,879 INFO ]: Analyzing trace with hash -411423458, now seen corresponding path program 7 times [2018-06-22 15:14:04,879 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:14:04,879 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:14:04,880 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:04,880 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:14:04,880 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:14:04,948 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:05,615 WARN ]: Spent 104.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2018-06-22 15:14:05,738 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2018-06-22 15:14:05,882 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2018-06-22 15:14:06,285 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:14:06,285 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:14:06,285 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 [2018-06-22 15:14:06,292 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:14:06,356 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:14:06,362 INFO ]: Computing forward predicates... [2018-06-22 15:14:07,900 WARN ]: Spent 1.40 s on a formula simplification. DAG size of input: 195 DAG size of output: 54 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown