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_2_e2_704.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:11:03,677 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:11:03,679 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:11:03,690 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:11:03,690 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:11:03,691 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:11:03,697 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:11:03,699 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:11:03,701 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:11:03,701 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:11:03,702 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:11:03,703 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:11:03,703 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:11:03,705 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:11:03,705 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:11:03,706 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:11:03,708 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:11:03,709 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:11:03,711 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:11:03,712 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:11:03,713 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:11:03,716 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:11:03,716 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:11:03,716 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:11:03,717 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:11:03,718 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:11:03,719 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:11:03,719 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:11:03,720 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:11:03,721 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:11:03,721 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:11:03,722 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:11:03,722 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:11:03,723 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:11:03,724 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:11:03,724 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 19:11:03,737 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:11:03,738 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:11:03,738 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:11:03,738 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:11:03,739 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:11:03,740 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:11:03,740 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:11:03,740 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:11:03,740 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:11:03,741 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:11:03,741 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:11:03,741 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:11:03,741 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:11:03,742 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:11:03,742 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:11:03,742 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:11:03,742 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:11:03,743 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:11:03,743 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:11:03,744 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:11:03,745 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:11:03,784 INFO ]: Repository-Root is: /tmp [2018-06-22 19:11:03,804 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:11:03,807 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:11:03,810 INFO ]: Initializing SmtParser... [2018-06-22 19:11:03,811 INFO ]: SmtParser initialized [2018-06-22 19:11:03,811 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704.smt2 [2018-06-22 19:11:03,812 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 19:11:03,882 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704.smt2 unknown [2018-06-22 19:11:04,344 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e2_704.smt2 [2018-06-22 19:11:04,349 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:11:04,355 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:11:04,355 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:11:04,355 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:11:04,356 INFO ]: ChcToBoogie initialized [2018-06-22 19:11:04,359 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,409 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04 Unit [2018-06-22 19:11:04,409 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:11:04,409 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:11:04,409 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:11:04,409 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:11:04,430 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,430 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,440 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,440 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,445 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,446 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,448 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (1/1) ... [2018-06-22 19:11:04,452 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:11:04,452 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:11:04,452 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:11:04,452 INFO ]: RCFGBuilder initialized [2018-06-22 19:11:04,453 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (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 19:11:04,464 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:11:04,464 INFO ]: Found specification of procedure False [2018-06-22 19:11:04,464 INFO ]: Found implementation of procedure False [2018-06-22 19:11:04,464 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:11:04,464 INFO ]: Found specification of procedure state [2018-06-22 19:11:04,464 INFO ]: Found implementation of procedure state [2018-06-22 19:11:04,464 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:11:04,464 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:11:04,464 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 19:11:04,895 INFO ]: Using library mode [2018-06-22 19:11:04,895 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:11:04 BoogieIcfgContainer [2018-06-22 19:11:04,895 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:11:04,901 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:11:04,901 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:11:04,905 INFO ]: TraceAbstraction initialized [2018-06-22 19:11:04,906 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:11:04" (1/3) ... [2018-06-22 19:11:04,906 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73810266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:11:04, skipping insertion in model container [2018-06-22 19:11:04,907 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:11:04" (2/3) ... [2018-06-22 19:11:04,907 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73810266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:11:04, skipping insertion in model container [2018-06-22 19:11:04,907 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:11:04" (3/3) ... [2018-06-22 19:11:04,909 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:11:04,918 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:11:04,929 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:11:04,970 INFO ]: Using default assertion order modulation [2018-06-22 19:11:04,971 INFO ]: Interprodecural is true [2018-06-22 19:11:04,971 INFO ]: Hoare is false [2018-06-22 19:11:04,971 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:11:04,971 INFO ]: Backedges is TWOTRACK [2018-06-22 19:11:04,971 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:11:04,971 INFO ]: Difference is false [2018-06-22 19:11:04,971 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:11:04,971 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:11:04,984 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:11:04,994 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:11:04,994 INFO ]: Found error trace [2018-06-22 19:11:04,995 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:04,995 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:05,001 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 19:11:05,003 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:05,004 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:05,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:05,053 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:05,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:05,145 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:05,351 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:11:05,352 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:11:05,352 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:11:05,354 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:11:05,365 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:11:05,365 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:11:05,367 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:11:05,526 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:05,526 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:11:05,527 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:11:05,528 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:11:05,528 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:05,538 INFO ]: With dead ends: 13 [2018-06-22 19:11:05,538 INFO ]: Without dead ends: 13 [2018-06-22 19:11:05,540 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:11:05,552 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:11:05,570 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:11:05,571 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:11:05,572 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:11:05,573 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:11:05,573 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:05,573 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:11:05,573 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:11:05,573 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:11:05,574 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:11:05,574 INFO ]: Found error trace [2018-06-22 19:11:05,575 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:05,575 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:05,575 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 19:11:05,575 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:05,575 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:05,576 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:05,576 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:05,576 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:05,680 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:06,140 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 19 [2018-06-22 19:11:06,318 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 19:11:06,338 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:11:06,338 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:06,338 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 19:11:06,346 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:06,458 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:06,468 INFO ]: Computing forward predicates... [2018-06-22 19:11:06,831 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-22 19:11:06,900 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:11:06,935 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:06,935 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:11:06,936 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:11:06,936 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:11:06,936 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:11:06,936 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:11:07,186 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2018-06-22 19:11:07,431 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:07,431 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:11:07,432 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:11:07,432 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:11:07,432 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:07,433 INFO ]: With dead ends: 15 [2018-06-22 19:11:07,433 INFO ]: Without dead ends: 15 [2018-06-22 19:11:07,434 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:11:07,434 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:11:07,439 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:11:07,439 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:11:07,440 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:11:07,440 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:11:07,441 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:07,441 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:11:07,441 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:11:07,441 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:11:07,442 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:11:07,442 INFO ]: Found error trace [2018-06-22 19:11:07,442 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:07,442 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:07,442 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 19:11:07,442 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:07,442 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:07,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:07,443 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:11:07,443 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:07,550 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:08,220 WARN ]: Spent 374.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2018-06-22 19:11:08,315 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:11:08,315 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:08,315 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 19:11:08,330 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:11:08,452 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:11:08,452 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:08,457 INFO ]: Computing forward predicates... [2018-06-22 19:11:08,974 WARN ]: Spent 231.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2018-06-22 19:11:09,250 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:11:09,282 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:09,282 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:11:09,282 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:11:09,282 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:11:09,282 INFO ]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:11:09,282 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:11:09,655 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 99 [2018-06-22 19:11:10,084 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 114 [2018-06-22 19:11:10,355 WARN ]: Spent 225.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 83 [2018-06-22 19:11:10,398 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:10,398 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:11:10,399 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:11:10,399 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:11:10,400 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:10,400 INFO ]: With dead ends: 17 [2018-06-22 19:11:10,400 INFO ]: Without dead ends: 17 [2018-06-22 19:11:10,401 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:11:10,401 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:11:10,404 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:11:10,404 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:11:10,404 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:11:10,404 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:11:10,404 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:10,404 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:11:10,404 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:11:10,404 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:11:10,405 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:11:10,405 INFO ]: Found error trace [2018-06-22 19:11:10,405 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:10,405 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:10,405 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 19:11:10,405 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:10,405 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:10,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:10,406 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:10,406 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:10,518 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:10,958 WARN ]: Spent 140.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-06-22 19:11:11,085 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2018-06-22 19:11:11,319 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2018-06-22 19:11:11,703 WARN ]: Spent 359.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2018-06-22 19:11:11,831 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2018-06-22 19:11:11,845 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:11:11,845 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:11,845 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 19:11:11,853 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:11:11,991 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:11:11,991 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:11,996 INFO ]: Computing forward predicates... [2018-06-22 19:11:12,215 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:11:12,235 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:12,235 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:11:12,236 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:11:12,236 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:11:12,236 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:11:12,236 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:11:12,759 WARN ]: Spent 404.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 137 [2018-06-22 19:11:13,254 WARN ]: Spent 447.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 147 [2018-06-22 19:11:13,715 WARN ]: Spent 421.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 140 [2018-06-22 19:11:14,109 WARN ]: Spent 347.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2018-06-22 19:11:14,213 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:14,213 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:11:14,214 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:11:14,214 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:11:14,214 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:14,214 INFO ]: With dead ends: 19 [2018-06-22 19:11:14,214 INFO ]: Without dead ends: 19 [2018-06-22 19:11:14,215 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:11:14,215 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:11:14,218 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:11:14,218 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:11:14,219 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:11:14,219 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:11:14,219 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:14,219 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:11:14,219 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:11:14,219 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:11:14,219 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:11:14,219 INFO ]: Found error trace [2018-06-22 19:11:14,220 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:14,220 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:14,220 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 19:11:14,220 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:14,220 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:14,221 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:14,221 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:14,221 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:14,444 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:15,745 WARN ]: Spent 870.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2018-06-22 19:11:16,282 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 64 [2018-06-22 19:11:16,946 WARN ]: Spent 588.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2018-06-22 19:11:17,472 WARN ]: Spent 494.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 62 [2018-06-22 19:11:17,741 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 37 [2018-06-22 19:11:18,062 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 42 [2018-06-22 19:11:18,478 WARN ]: Spent 371.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 56 [2018-06-22 19:11:18,496 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:11:18,496 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:18,496 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 19:11:18,502 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:11:18,670 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:11:18,670 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:18,679 INFO ]: Computing forward predicates... [2018-06-22 19:11:19,425 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 19:11:19,484 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:11:19,505 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:19,505 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 19:11:19,505 INFO ]: Interpolant automaton has 21 states [2018-06-22 19:11:19,505 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 19:11:19,505 INFO ]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:11:19,506 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 19:11:20,179 WARN ]: Spent 554.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 145 [2018-06-22 19:11:20,976 WARN ]: Spent 718.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 159 [2018-06-22 19:11:21,700 WARN ]: Spent 668.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 151 [2018-06-22 19:11:22,678 WARN ]: Spent 911.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 174 [2018-06-22 19:11:23,176 WARN ]: Spent 448.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 124 [2018-06-22 19:11:23,243 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:23,243 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:11:23,243 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:11:23,243 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 19:11:23,244 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:23,244 INFO ]: With dead ends: 21 [2018-06-22 19:11:23,244 INFO ]: Without dead ends: 21 [2018-06-22 19:11:23,245 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2018-06-22 19:11:23,245 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:11:23,248 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:11:23,248 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:11:23,249 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:11:23,249 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:11:23,249 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:23,249 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:11:23,249 INFO ]: Interpolant automaton has 21 states. [2018-06-22 19:11:23,249 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:11:23,250 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:11:23,250 INFO ]: Found error trace [2018-06-22 19:11:23,250 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:23,250 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:23,250 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 19:11:23,250 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:23,250 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:23,251 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:23,251 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:23,251 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:23,562 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:27,904 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 113 DAG size of output: 19 [2018-06-22 19:11:28,042 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2018-06-22 19:11:32,839 WARN ]: Spent 4.60 s on a formula simplification. DAG size of input: 496 DAG size of output: 62 [2018-06-22 19:11:34,460 WARN ]: Spent 1.42 s on a formula simplification. DAG size of input: 454 DAG size of output: 38 [2018-06-22 19:11:36,690 WARN ]: Spent 2.04 s on a formula simplification. DAG size of input: 469 DAG size of output: 50 [2018-06-22 19:11:38,714 WARN ]: Spent 1.84 s on a formula simplification. DAG size of input: 455 DAG size of output: 31 [2018-06-22 19:11:41,276 WARN ]: Spent 2.28 s on a formula simplification. DAG size of input: 656 DAG size of output: 38 [2018-06-22 19:11:44,030 WARN ]: Spent 2.56 s on a formula simplification. DAG size of input: 363 DAG size of output: 45 [2018-06-22 19:11:46,047 WARN ]: Spent 1.86 s on a formula simplification. DAG size of input: 190 DAG size of output: 42 [2018-06-22 19:11:46,067 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:11:46,068 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:11:46,068 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 19:11:46,074 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:11:46,288 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:11:46,288 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:11:46,305 INFO ]: Computing forward predicates... [2018-06-22 19:11:46,990 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:11:47,010 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:11:47,011 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2018-06-22 19:11:47,011 INFO ]: Interpolant automaton has 23 states [2018-06-22 19:11:47,011 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 19:11:47,011 INFO ]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2018-06-22 19:11:47,011 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 19:11:47,170 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2018-06-22 19:11:47,532 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 118 [2018-06-22 19:11:48,188 WARN ]: Spent 583.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 127 [2018-06-22 19:11:49,106 WARN ]: Spent 825.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 133 [2018-06-22 19:11:50,202 WARN ]: Spent 894.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 147 [2018-06-22 19:11:50,835 WARN ]: Spent 564.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 148 [2018-06-22 19:11:51,166 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 103 [2018-06-22 19:11:51,224 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:11:51,224 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:11:51,225 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:11:51,225 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 19:11:51,225 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:11:51,226 INFO ]: With dead ends: 23 [2018-06-22 19:11:51,226 INFO ]: Without dead ends: 23 [2018-06-22 19:11:51,226 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2018-06-22 19:11:51,227 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:11:51,230 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:11:51,230 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:11:51,231 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:11:51,231 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:11:51,231 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:11:51,231 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:11:51,231 INFO ]: Interpolant automaton has 23 states. [2018-06-22 19:11:51,231 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:11:51,232 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:11:51,232 INFO ]: Found error trace [2018-06-22 19:11:51,232 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:11:51,232 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:11:51,232 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 19:11:51,232 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:11:51,232 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:11:51,232 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:51,232 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:11:51,232 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:11:51,928 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown