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/lustre/metros_4_e3_1091_e4_232.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:26:01,888 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:26:01,890 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:26:01,906 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:26:01,906 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:26:01,908 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:26:01,909 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:26:01,911 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:26:01,912 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:26:01,913 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:26:01,914 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:26:01,915 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:26:01,916 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:26:01,916 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:26:01,917 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:26:01,920 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:26:01,921 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:26:01,931 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:26:01,933 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:26:01,933 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:26:01,934 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:26:01,939 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:26:01,940 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:26:01,940 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:26:01,941 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:26:01,941 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:26:01,942 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:26:01,943 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:26:01,944 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:26:01,947 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:26:01,948 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:26:01,949 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:26:01,949 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:26:01,950 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:26:01,950 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:26:01,951 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 19:26:01,968 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:26:01,968 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:26:01,968 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:26:01,969 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:26:01,970 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:26:01,971 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:26:01,971 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:26:01,971 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:26:01,971 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:26:01,971 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:26:01,972 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:26:01,972 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:26:01,972 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:26:01,972 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:26:01,972 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:26:01,973 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:26:01,973 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:26:01,973 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:26:01,973 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:26:01,978 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:26:01,979 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:26:02,027 INFO ]: Repository-Root is: /tmp [2018-06-22 19:26:02,040 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:26:02,044 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:26:02,046 INFO ]: Initializing SmtParser... [2018-06-22 19:26:02,046 INFO ]: SmtParser initialized [2018-06-22 19:26:02,046 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 [2018-06-22 19:26:02,048 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 19:26:02,135 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 unknown [2018-06-22 19:26:02,550 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1091_e4_232.smt2 [2018-06-22 19:26:02,554 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:26:02,564 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:26:02,564 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:26:02,564 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:26:02,565 INFO ]: ChcToBoogie initialized [2018-06-22 19:26:02,568 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,628 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02 Unit [2018-06-22 19:26:02,628 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:26:02,628 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:26:02,628 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:26:02,628 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:26:02,653 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,654 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,671 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,671 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,675 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,685 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,686 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... [2018-06-22 19:26:02,689 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:26:02,689 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:26:02,689 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:26:02,689 INFO ]: RCFGBuilder initialized [2018-06-22 19:26:02,690 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 19:26:02,717 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:26:02,717 INFO ]: Found specification of procedure False [2018-06-22 19:26:02,717 INFO ]: Found implementation of procedure False [2018-06-22 19:26:02,717 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:26:02,717 INFO ]: Found specification of procedure state [2018-06-22 19:26:02,717 INFO ]: Found implementation of procedure state [2018-06-22 19:26:02,717 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:26:02,717 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:26:02,717 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:26:03,154 INFO ]: Using library mode [2018-06-22 19:26:03,154 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:26:03 BoogieIcfgContainer [2018-06-22 19:26:03,154 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:26:03,156 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:26:03,156 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:26:03,160 INFO ]: TraceAbstraction initialized [2018-06-22 19:26:03,161 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:26:02" (1/3) ... [2018-06-22 19:26:03,162 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723becf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:26:03, skipping insertion in model container [2018-06-22 19:26:03,162 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:26:02" (2/3) ... [2018-06-22 19:26:03,162 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@723becf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:26:03, skipping insertion in model container [2018-06-22 19:26:03,162 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:26:03" (3/3) ... [2018-06-22 19:26:03,164 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:26:03,174 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:26:03,184 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:26:03,233 INFO ]: Using default assertion order modulation [2018-06-22 19:26:03,234 INFO ]: Interprodecural is true [2018-06-22 19:26:03,234 INFO ]: Hoare is false [2018-06-22 19:26:03,234 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:26:03,234 INFO ]: Backedges is TWOTRACK [2018-06-22 19:26:03,234 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:26:03,234 INFO ]: Difference is false [2018-06-22 19:26:03,234 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:26:03,234 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:26:03,248 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:26:03,258 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:26:03,258 INFO ]: Found error trace [2018-06-22 19:26:03,259 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:03,259 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:03,265 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:26:03,267 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:03,268 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:03,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:03,312 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:26:03,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:03,392 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:03,561 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:26:03,563 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:26:03,563 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:26:03,564 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:26:03,575 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:26:03,575 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:26:03,576 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:26:03,702 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:03,703 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:26:03,704 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:26:03,705 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:26:03,706 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:03,720 INFO ]: With dead ends: 13 [2018-06-22 19:26:03,720 INFO ]: Without dead ends: 13 [2018-06-22 19:26:03,721 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 19:26:03,741 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:26:03,770 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:26:03,771 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:26:03,771 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:26:03,773 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:26:03,773 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:03,773 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:26:03,773 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:26:03,773 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:26:03,774 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:26:03,774 INFO ]: Found error trace [2018-06-22 19:26:03,774 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:03,774 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:03,775 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:26:03,775 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:03,775 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:03,776 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:03,776 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:26:03,776 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:03,860 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:04,203 WARN ]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:26:04,463 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:26:04,463 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:26:04,463 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 19:26:04,476 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:26:04,608 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:04,617 INFO ]: Computing forward predicates... [2018-06-22 19:26:04,955 WARN ]: Spent 160.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:26:05,125 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:26:05,147 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:26:05,147 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 19:26:05,148 INFO ]: Interpolant automaton has 9 states [2018-06-22 19:26:05,148 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 19:26:05,148 INFO ]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2018-06-22 19:26:05,148 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 19:26:05,498 WARN ]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 19:26:05,637 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:05,637 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:26:05,638 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:26:05,638 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 19:26:05,638 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:05,639 INFO ]: With dead ends: 15 [2018-06-22 19:26:05,639 INFO ]: Without dead ends: 15 [2018-06-22 19:26:05,640 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:26:05,640 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:26:05,642 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:26:05,642 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:26:05,643 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:26:05,643 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:26:05,643 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:05,643 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:26:05,643 INFO ]: Interpolant automaton has 9 states. [2018-06-22 19:26:05,643 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:26:05,644 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:26:05,644 INFO ]: Found error trace [2018-06-22 19:26:05,644 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:05,644 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:05,644 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:26:05,644 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:05,644 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:05,645 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:05,645 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:26:05,645 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:05,761 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:05,989 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:26:05,989 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:26:05,989 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 19:26:06,000 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:26:06,149 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:26:06,149 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:06,157 INFO ]: Computing forward predicates... [2018-06-22 19:26:06,464 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 7 [2018-06-22 19:26:06,803 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:26:06,826 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:26:06,826 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:26:06,827 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:26:06,827 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:26:06,827 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:26:06,827 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:26:07,126 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:07,127 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:26:07,128 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:26:07,128 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:26:07,128 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:07,129 INFO ]: With dead ends: 17 [2018-06-22 19:26:07,129 INFO ]: Without dead ends: 17 [2018-06-22 19:26:07,129 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:26:07,129 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:26:07,132 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:26:07,132 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:26:07,133 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:26:07,133 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:26:07,133 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:07,133 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:26:07,133 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:26:07,133 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:26:07,134 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:26:07,134 INFO ]: Found error trace [2018-06-22 19:26:07,134 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:07,134 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:07,134 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:26:07,134 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:07,134 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:07,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:07,135 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:26:07,135 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:07,255 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:07,847 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:26:07,847 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:26:07,847 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) [2018-06-22 19:26:07,863 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 19:26:08,026 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:26:08,026 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:08,032 INFO ]: Computing forward predicates... [2018-06-22 19:26:08,368 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:26:08,390 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:26:08,390 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:26:08,390 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:26:08,390 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:26:08,390 INFO ]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:26:08,391 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:26:08,786 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:08,786 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:26:08,786 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:26:08,786 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:26:08,786 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:08,787 INFO ]: With dead ends: 19 [2018-06-22 19:26:08,787 INFO ]: Without dead ends: 19 [2018-06-22 19:26:08,787 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:26:08,787 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:26:08,791 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:26:08,791 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:26:08,791 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:26:08,791 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:26:08,791 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:08,792 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:26:08,792 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:26:08,792 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:26:08,792 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:26:08,792 INFO ]: Found error trace [2018-06-22 19:26:08,792 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:08,792 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:08,792 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:26:08,792 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:08,793 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:08,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:08,793 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:26:08,793 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:08,927 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:09,363 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:26:09,561 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2018-06-22 19:26:09,687 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2018-06-22 19:26:10,096 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 25 [2018-06-22 19:26:10,316 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:26:10,317 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:26:10,317 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 19:26:10,324 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:26:10,501 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:26:10,501 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:10,509 INFO ]: Computing forward predicates... [2018-06-22 19:26:11,079 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:26:11,099 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:26:11,099 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:26:11,099 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:26:11,100 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:26:11,100 INFO ]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:26:11,100 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:26:11,293 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2018-06-22 19:26:11,520 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2018-06-22 19:26:11,738 WARN ]: Spent 190.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2018-06-22 19:26:11,895 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2018-06-22 19:26:12,066 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:12,067 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:26:12,067 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:26:12,067 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:26:12,067 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:12,068 INFO ]: With dead ends: 21 [2018-06-22 19:26:12,068 INFO ]: Without dead ends: 21 [2018-06-22 19:26:12,068 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:26:12,068 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:26:12,071 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:26:12,071 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:26:12,072 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:26:12,072 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:26:12,072 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:12,072 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:26:12,072 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:26:12,072 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:26:12,073 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:26:12,073 INFO ]: Found error trace [2018-06-22 19:26:12,073 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:12,073 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:12,074 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:26:12,074 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:12,074 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:12,074 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:12,091 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:26:12,091 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:12,395 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:13,595 WARN ]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:26:14,931 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 213 DAG size of output: 26 [2018-06-22 19:26:15,252 WARN ]: Spent 263.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 19 [2018-06-22 19:26:15,563 WARN ]: Spent 280.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 34 [2018-06-22 19:26:16,318 WARN ]: Spent 569.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 63 [2018-06-22 19:26:16,765 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 39 [2018-06-22 19:26:17,160 WARN ]: Spent 289.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 13 [2018-06-22 19:26:17,750 WARN ]: Spent 485.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 18 [2018-06-22 19:26:18,231 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 16 [2018-06-22 19:26:18,250 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:26:18,250 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:26:18,250 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 19:26:18,256 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:26:18,480 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:26:18,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:26:18,489 INFO ]: Computing forward predicates... [2018-06-22 19:26:18,863 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:26:18,885 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:26:18,885 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-22 19:26:18,886 INFO ]: Interpolant automaton has 24 states [2018-06-22 19:26:18,886 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 19:26:18,886 INFO ]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2018-06-22 19:26:18,886 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 19:26:19,196 WARN ]: Spent 224.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 121 [2018-06-22 19:26:19,543 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 131 [2018-06-22 19:26:20,241 WARN ]: Spent 521.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 119 [2018-06-22 19:26:20,553 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 132 [2018-06-22 19:26:20,975 WARN ]: Spent 376.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 132 [2018-06-22 19:26:21,258 WARN ]: Spent 233.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 126 [2018-06-22 19:26:21,520 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 119 [2018-06-22 19:26:21,780 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 111 [2018-06-22 19:26:21,828 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:26:21,828 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 19:26:21,829 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 19:26:21,829 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 19:26:21,829 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:26:21,830 INFO ]: With dead ends: 27 [2018-06-22 19:26:21,830 INFO ]: Without dead ends: 27 [2018-06-22 19:26:21,830 INFO ]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=220, Invalid=836, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 19:26:21,830 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 19:26:21,834 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 19:26:21,834 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 19:26:21,835 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 19:26:21,835 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 29 [2018-06-22 19:26:21,835 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:26:21,835 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 19:26:21,835 INFO ]: Interpolant automaton has 24 states. [2018-06-22 19:26:21,835 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 19:26:21,836 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 19:26:21,836 INFO ]: Found error trace [2018-06-22 19:26:21,836 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:26:21,836 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:26:21,836 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 6 times [2018-06-22 19:26:21,836 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:26:21,836 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:26:21,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:21,837 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:26:21,837 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:26:26,111 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 19:26:59,343 WARN ]: Unable to check validity of interpolant: cancelled [2018-06-22 19:27:00,633 WARN ]: Unable to check validity of interpolant: cancelled Cannot interrupt operation gracefully because timeout expired. Forcing shutdown