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_e1_1116.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:08:32,503 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:08:32,505 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:08:32,523 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:08:32,523 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:08:32,524 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:08:32,525 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:08:32,527 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:08:32,528 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:08:32,529 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:08:32,529 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:08:32,530 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:08:32,530 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:08:32,532 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:08:32,532 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:08:32,533 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:08:32,535 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:08:32,537 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:08:32,538 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:08:32,539 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:08:32,540 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:08:32,543 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:08:32,543 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:08:32,543 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:08:32,544 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:08:32,545 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:08:32,545 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:08:32,546 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:08:32,547 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:08:32,548 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:08:32,548 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:08:32,549 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:08:32,549 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:08:32,550 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:08:32,551 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:08:32,551 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 19:08:32,564 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:08:32,565 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:08:32,565 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:08:32,565 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:08:32,566 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:08:32,566 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:08:32,567 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:08:32,567 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:08:32,567 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:08:32,567 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:08:32,567 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:08:32,568 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:08:32,568 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:08:32,568 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:08:32,568 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:08:32,568 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:08:32,569 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:08:32,569 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:08:32,569 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:08:32,570 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:08:32,571 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:08:32,620 INFO ]: Repository-Root is: /tmp [2018-06-22 19:08:32,637 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:08:32,645 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:08:32,646 INFO ]: Initializing SmtParser... [2018-06-22 19:08:32,646 INFO ]: SmtParser initialized [2018-06-22 19:08:32,647 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 [2018-06-22 19:08:32,649 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 19:08:32,739 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 unknown [2018-06-22 19:08:33,216 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2_e1_1116.smt2 [2018-06-22 19:08:33,221 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:08:33,236 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:08:33,236 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:08:33,237 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:08:33,237 INFO ]: ChcToBoogie initialized [2018-06-22 19:08:33,248 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,334 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33 Unit [2018-06-22 19:08:33,335 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:08:33,335 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:08:33,335 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:08:33,335 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:08:33,357 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,357 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,373 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,373 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,379 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,383 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,385 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (1/1) ... [2018-06-22 19:08:33,388 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:08:33,390 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:08:33,390 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:08:33,390 INFO ]: RCFGBuilder initialized [2018-06-22 19:08:33,391 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (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 19:08:33,407 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:08:33,407 INFO ]: Found specification of procedure False [2018-06-22 19:08:33,408 INFO ]: Found implementation of procedure False [2018-06-22 19:08:33,408 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:08:33,408 INFO ]: Found specification of procedure state [2018-06-22 19:08:33,408 INFO ]: Found implementation of procedure state [2018-06-22 19:08:33,408 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:08:33,408 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:08:33,408 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 19:08:33,744 INFO ]: Using library mode [2018-06-22 19:08:33,745 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:08:33 BoogieIcfgContainer [2018-06-22 19:08:33,745 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:08:33,747 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:08:33,747 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:08:33,753 INFO ]: TraceAbstraction initialized [2018-06-22 19:08:33,753 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:08:33" (1/3) ... [2018-06-22 19:08:33,754 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1647cc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:08:33, skipping insertion in model container [2018-06-22 19:08:33,754 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:08:33" (2/3) ... [2018-06-22 19:08:33,755 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1647cc51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:08:33, skipping insertion in model container [2018-06-22 19:08:33,755 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:08:33" (3/3) ... [2018-06-22 19:08:33,757 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:08:33,767 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:08:33,775 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:08:33,828 INFO ]: Using default assertion order modulation [2018-06-22 19:08:33,829 INFO ]: Interprodecural is true [2018-06-22 19:08:33,829 INFO ]: Hoare is false [2018-06-22 19:08:33,829 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:08:33,829 INFO ]: Backedges is TWOTRACK [2018-06-22 19:08:33,829 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:08:33,829 INFO ]: Difference is false [2018-06-22 19:08:33,829 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:08:33,829 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:08:33,845 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:08:33,857 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:08:33,857 INFO ]: Found error trace [2018-06-22 19:08:33,858 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:33,858 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:33,863 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:08:33,865 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:33,865 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:33,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:33,904 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:08:33,904 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:34,001 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:34,165 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:08:34,167 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:08:34,167 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:08:34,168 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:08:34,179 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:08:34,179 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:08:34,181 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:08:34,324 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:34,325 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:08:34,325 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:08:34,327 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:08:34,327 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:34,343 INFO ]: With dead ends: 13 [2018-06-22 19:08:34,344 INFO ]: Without dead ends: 13 [2018-06-22 19:08:34,346 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 19:08:34,364 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:08:34,401 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:08:34,402 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:08:34,403 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:08:34,406 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:08:34,406 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:34,406 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:08:34,406 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:08:34,406 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:08:34,407 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:08:34,408 INFO ]: Found error trace [2018-06-22 19:08:34,408 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:34,408 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:34,408 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:08:34,408 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:34,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:34,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:34,409 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:08:34,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:34,491 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:35,360 WARN ]: Spent 634.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-22 19:08:35,420 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:08:35,420 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:08:35,420 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 19:08:35,427 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:08:35,545 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:35,557 INFO ]: Computing forward predicates... [2018-06-22 19:08:36,080 WARN ]: Spent 257.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2018-06-22 19:08:36,411 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:08:36,451 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:08:36,451 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:08:36,452 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:08:36,452 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:08:36,452 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:08:36,452 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:08:36,988 WARN ]: Spent 351.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2018-06-22 19:08:37,226 WARN ]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 19:08:37,579 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:37,579 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:08:37,579 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:08:37,579 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:08:37,580 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:37,580 INFO ]: With dead ends: 15 [2018-06-22 19:08:37,580 INFO ]: Without dead ends: 15 [2018-06-22 19:08:37,581 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2018-06-22 19:08:37,581 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:08:37,584 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:08:37,584 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:08:37,584 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:08:37,584 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:08:37,585 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:37,585 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:08:37,585 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:08:37,585 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:08:37,585 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:08:37,585 INFO ]: Found error trace [2018-06-22 19:08:37,585 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:37,586 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:37,586 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:08:37,586 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:37,586 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:37,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:37,586 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:08:37,586 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:37,714 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:38,087 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2018-06-22 19:08:38,252 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:08:38,252 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:08:38,252 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 19:08:38,286 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:08:38,396 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:08:38,396 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:38,402 INFO ]: Computing forward predicates... [2018-06-22 19:08:38,675 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:08:38,709 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:08:38,709 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:08:38,710 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:08:38,710 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:08:38,710 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:08:38,710 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:08:38,940 WARN ]: Spent 187.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2018-06-22 19:08:39,204 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2018-06-22 19:08:39,367 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 57 [2018-06-22 19:08:39,411 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:39,411 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:08:39,412 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:08:39,412 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:08:39,412 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:39,413 INFO ]: With dead ends: 17 [2018-06-22 19:08:39,413 INFO ]: Without dead ends: 17 [2018-06-22 19:08:39,413 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:08:39,413 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:08:39,416 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:08:39,416 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:08:39,417 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:08:39,417 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:08:39,417 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:39,417 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:08:39,417 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:08:39,417 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:08:39,418 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:08:39,418 INFO ]: Found error trace [2018-06-22 19:08:39,418 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:39,418 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:39,418 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:08:39,418 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:39,418 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:39,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:39,419 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:08:39,419 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:39,577 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:40,109 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2018-06-22 19:08:40,222 WARN ]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2018-06-22 19:08:40,441 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2018-06-22 19:08:40,799 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2018-06-22 19:08:40,813 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:08:40,813 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:08:40,813 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 19:08:40,821 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:08:40,998 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:08:40,998 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:41,005 INFO ]: Computing forward predicates... [2018-06-22 19:08:41,249 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:08:41,271 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:08:41,271 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:08:41,271 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:08:41,271 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:08:41,272 INFO ]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:08:41,272 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:08:41,571 WARN ]: Spent 250.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 126 [2018-06-22 19:08:41,997 WARN ]: Spent 333.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 127 [2018-06-22 19:08:42,363 WARN ]: Spent 329.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 129 [2018-06-22 19:08:42,562 WARN ]: Spent 155.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 104 [2018-06-22 19:08:42,609 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:42,609 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:08:42,610 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:08:42,610 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:08:42,611 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:42,611 INFO ]: With dead ends: 19 [2018-06-22 19:08:42,611 INFO ]: Without dead ends: 19 [2018-06-22 19:08:42,612 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:08:42,612 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:08:42,615 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:08:42,615 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:08:42,615 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:08:42,616 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:08:42,616 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:42,616 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:08:42,616 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:08:42,616 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:08:42,617 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:08:42,617 INFO ]: Found error trace [2018-06-22 19:08:42,617 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:42,617 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:42,617 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 19:08:42,617 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:42,617 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:42,618 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:42,618 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:08:42,618 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:42,784 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:44,024 WARN ]: Spent 690.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2018-06-22 19:08:44,409 WARN ]: Spent 366.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 88 [2018-06-22 19:08:44,740 WARN ]: Spent 308.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 63 [2018-06-22 19:08:45,300 WARN ]: Spent 478.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 54 [2018-06-22 19:08:45,948 WARN ]: Spent 567.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 39 [2018-06-22 19:08:46,360 WARN ]: Spent 261.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 48 [2018-06-22 19:08:46,610 WARN ]: Spent 206.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 59 [2018-06-22 19:08:46,632 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:08:46,632 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:08:46,633 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 19:08:46,645 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:08:46,820 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:08:46,820 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:46,827 INFO ]: Computing forward predicates... [2018-06-22 19:08:47,757 INFO ]: Checked inductivity of 36 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-22 19:08:47,777 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:08:47,777 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2018-06-22 19:08:47,777 INFO ]: Interpolant automaton has 20 states [2018-06-22 19:08:47,778 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 19:08:47,778 INFO ]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2018-06-22 19:08:47,778 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 20 states. [2018-06-22 19:08:48,492 WARN ]: Spent 631.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 174 [2018-06-22 19:08:49,230 WARN ]: Spent 640.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 184 [2018-06-22 19:08:49,912 WARN ]: Spent 620.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 180 [2018-06-22 19:08:50,610 WARN ]: Spent 629.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 181 [2018-06-22 19:08:52,189 WARN ]: Spent 434.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 149 [2018-06-22 19:08:52,349 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:08:52,349 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:08:52,355 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:08:52,355 INFO ]: Start accepts. Automaton has 20 states. Word has length 25 [2018-06-22 19:08:52,355 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:08:52,356 INFO ]: With dead ends: 21 [2018-06-22 19:08:52,356 INFO ]: Without dead ends: 21 [2018-06-22 19:08:52,356 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=127, Invalid=523, Unknown=0, NotChecked=0, Total=650 [2018-06-22 19:08:52,357 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:08:52,360 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:08:52,360 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:08:52,361 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:08:52,361 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:08:52,361 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:08:52,361 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:08:52,361 INFO ]: Interpolant automaton has 20 states. [2018-06-22 19:08:52,361 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:08:52,362 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:08:52,362 INFO ]: Found error trace [2018-06-22 19:08:52,362 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:08:52,362 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:08:52,363 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 19:08:52,363 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:08:52,363 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:08:52,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:52,363 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:08:52,363 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:08:52,670 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:08:57,064 WARN ]: Spent 2.21 s on a formula simplification. DAG size of input: 216 DAG size of output: 22 [2018-06-22 19:08:58,011 WARN ]: Spent 884.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 50 [2018-06-22 19:08:59,334 WARN ]: Spent 1.18 s on a formula simplification. DAG size of input: 284 DAG size of output: 71 [2018-06-22 19:09:01,212 WARN ]: Spent 1.67 s on a formula simplification. DAG size of input: 319 DAG size of output: 50 [2018-06-22 19:09:02,385 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 357 DAG size of output: 45 [2018-06-22 19:09:04,080 WARN ]: Spent 1.50 s on a formula simplification. DAG size of input: 348 DAG size of output: 34 [2018-06-22 19:09:06,878 WARN ]: Spent 2.60 s on a formula simplification. DAG size of input: 456 DAG size of output: 38 [2018-06-22 19:09:08,872 WARN ]: Spent 1.80 s on a formula simplification. DAG size of input: 529 DAG size of output: 60 [2018-06-22 19:09:10,266 WARN ]: Spent 1.21 s on a formula simplification. DAG size of input: 487 DAG size of output: 40 [2018-06-22 19:09:10,290 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:09:10,290 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:09:10,290 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 19:09:10,298 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:09:10,488 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:09:10,488 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:09:10,498 INFO ]: Computing forward predicates... [2018-06-22 19:09:11,171 WARN ]: Spent 276.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 24 [2018-06-22 19:09:11,750 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2018-06-22 19:09:11,959 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:09:11,981 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:09:11,981 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2018-06-22 19:09:11,982 INFO ]: Interpolant automaton has 23 states [2018-06-22 19:09:11,982 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 19:09:11,982 INFO ]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2018-06-22 19:09:11,982 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 23 states. [2018-06-22 19:09:12,625 WARN ]: Spent 556.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 175 [2018-06-22 19:09:12,766 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2018-06-22 19:09:13,731 WARN ]: Spent 859.00 ms on a formula simplification. DAG size of input: 309 DAG size of output: 214 [2018-06-22 19:09:15,268 WARN ]: Spent 1.47 s on a formula simplification. DAG size of input: 296 DAG size of output: 223 [2018-06-22 19:09:16,290 WARN ]: Spent 935.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 226 [2018-06-22 19:09:17,125 WARN ]: Spent 620.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 195 [2018-06-22 19:09:17,809 WARN ]: Spent 501.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 155 [2018-06-22 19:09:17,884 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:09:17,884 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:09:17,886 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:09:17,886 INFO ]: Start accepts. Automaton has 23 states. Word has length 29 [2018-06-22 19:09:17,887 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:09:17,887 INFO ]: With dead ends: 23 [2018-06-22 19:09:17,887 INFO ]: Without dead ends: 23 [2018-06-22 19:09:17,888 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2018-06-22 19:09:17,888 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:09:17,891 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:09:17,891 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:09:17,892 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:09:17,892 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:09:17,892 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:09:17,892 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:09:17,892 INFO ]: Interpolant automaton has 23 states. [2018-06-22 19:09:17,892 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:09:17,893 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:09:17,893 INFO ]: Found error trace [2018-06-22 19:09:17,893 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:09:17,893 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:09:17,893 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 19:09:17,893 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:09:17,893 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:09:17,894 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:09:17,894 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:09:17,894 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:09:18,387 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown