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.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 19:12:19,514 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 19:12:19,516 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 19:12:19,531 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 19:12:19,532 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 19:12:19,533 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 19:12:19,534 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 19:12:19,535 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 19:12:19,537 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 19:12:19,538 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 19:12:19,539 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 19:12:19,539 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 19:12:19,540 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 19:12:19,541 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 19:12:19,541 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 19:12:19,542 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 19:12:19,544 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 19:12:19,545 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 19:12:19,547 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 19:12:19,548 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 19:12:19,549 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 19:12:19,551 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 19:12:19,552 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 19:12:19,552 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 19:12:19,553 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 19:12:19,554 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 19:12:19,554 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 19:12:19,555 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 19:12:19,556 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 19:12:19,557 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 19:12:19,557 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 19:12:19,558 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 19:12:19,558 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 19:12:19,559 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 19:12:19,560 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 19:12:19,560 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 19:12:19,573 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 19:12:19,573 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 19:12:19,574 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 19:12:19,574 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 19:12:19,575 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 19:12:19,575 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 19:12:19,575 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 19:12:19,576 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 19:12:19,576 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 19:12:19,576 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 19:12:19,576 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 19:12:19,576 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 19:12:19,577 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 19:12:19,577 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 19:12:19,577 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 19:12:19,577 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 19:12:19,577 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 19:12:19,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 19:12:19,578 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 19:12:19,579 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 19:12:19,579 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 19:12:19,643 INFO ]: Repository-Root is: /tmp [2018-06-22 19:12:19,659 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 19:12:19,663 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 19:12:19,664 INFO ]: Initializing SmtParser... [2018-06-22 19:12:19,664 INFO ]: SmtParser initialized [2018-06-22 19:12:19,665 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 [2018-06-22 19:12:19,666 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 19:12:19,743 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 unknown [2018-06-22 19:12:20,176 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_2.smt2 [2018-06-22 19:12:20,181 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 19:12:20,196 INFO ]: Walking toolchain with 4 elements. [2018-06-22 19:12:20,196 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 19:12:20,196 INFO ]: Initializing ChcToBoogie... [2018-06-22 19:12:20,197 INFO ]: ChcToBoogie initialized [2018-06-22 19:12:20,205 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,270 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20 Unit [2018-06-22 19:12:20,270 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 19:12:20,271 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 19:12:20,271 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 19:12:20,271 INFO ]: Boogie Preprocessor initialized [2018-06-22 19:12:20,292 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,292 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,304 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,304 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,321 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,322 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,332 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (1/1) ... [2018-06-22 19:12:20,336 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 19:12:20,336 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 19:12:20,336 INFO ]: Initializing RCFGBuilder... [2018-06-22 19:12:20,336 INFO ]: RCFGBuilder initialized [2018-06-22 19:12:20,337 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (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 19:12:20,366 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 19:12:20,366 INFO ]: Found specification of procedure False [2018-06-22 19:12:20,366 INFO ]: Found implementation of procedure False [2018-06-22 19:12:20,366 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 19:12:20,366 INFO ]: Found specification of procedure state [2018-06-22 19:12:20,366 INFO ]: Found implementation of procedure state [2018-06-22 19:12:20,367 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 19:12:20,367 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 19:12:20,367 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 19:12:20,715 INFO ]: Using library mode [2018-06-22 19:12:20,715 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:12:20 BoogieIcfgContainer [2018-06-22 19:12:20,715 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 19:12:20,717 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 19:12:20,717 INFO ]: Initializing TraceAbstraction... [2018-06-22 19:12:20,720 INFO ]: TraceAbstraction initialized [2018-06-22 19:12:20,721 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 07:12:20" (1/3) ... [2018-06-22 19:12:20,722 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5235dce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 07:12:20, skipping insertion in model container [2018-06-22 19:12:20,722 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 07:12:20" (2/3) ... [2018-06-22 19:12:20,722 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5235dce8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 07:12:20, skipping insertion in model container [2018-06-22 19:12:20,722 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 07:12:20" (3/3) ... [2018-06-22 19:12:20,724 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 19:12:20,733 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 19:12:20,743 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 19:12:20,789 INFO ]: Using default assertion order modulation [2018-06-22 19:12:20,789 INFO ]: Interprodecural is true [2018-06-22 19:12:20,789 INFO ]: Hoare is false [2018-06-22 19:12:20,789 INFO ]: Compute interpolants for FPandBP [2018-06-22 19:12:20,789 INFO ]: Backedges is TWOTRACK [2018-06-22 19:12:20,789 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 19:12:20,789 INFO ]: Difference is false [2018-06-22 19:12:20,789 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 19:12:20,790 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 19:12:20,803 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 19:12:20,818 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 19:12:20,818 INFO ]: Found error trace [2018-06-22 19:12:20,819 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:20,819 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:20,825 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 19:12:20,827 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:20,828 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:20,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:20,875 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:12:20,875 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:20,970 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:21,144 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 19:12:21,146 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 19:12:21,146 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 19:12:21,148 INFO ]: Interpolant automaton has 4 states [2018-06-22 19:12:21,163 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 19:12:21,164 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 19:12:21,166 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 19:12:21,301 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:21,302 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 19:12:21,303 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 19:12:21,304 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 19:12:21,305 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:21,318 INFO ]: With dead ends: 13 [2018-06-22 19:12:21,318 INFO ]: Without dead ends: 13 [2018-06-22 19:12:21,320 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 19:12:21,339 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 19:12:21,367 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 19:12:21,367 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 19:12:21,368 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 19:12:21,369 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 19:12:21,369 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:21,369 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 19:12:21,369 INFO ]: Interpolant automaton has 4 states. [2018-06-22 19:12:21,369 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 19:12:21,370 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 19:12:21,370 INFO ]: Found error trace [2018-06-22 19:12:21,370 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:21,370 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:21,370 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 19:12:21,370 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:21,370 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:21,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:21,371 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:12:21,371 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:21,471 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:22,035 WARN ]: Spent 322.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2018-06-22 19:12:22,080 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:12:22,080 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:12:22,080 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 19:12:22,086 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:12:22,201 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:22,211 INFO ]: Computing forward predicates... [2018-06-22 19:12:22,431 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 19:12:22,453 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:12:22,453 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 19:12:22,454 INFO ]: Interpolant automaton has 8 states [2018-06-22 19:12:22,454 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 19:12:22,454 INFO ]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-06-22 19:12:22,454 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 19:12:22,944 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 14 [2018-06-22 19:12:23,082 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:23,082 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 19:12:23,083 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 19:12:23,083 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 19:12:23,084 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:23,084 INFO ]: With dead ends: 15 [2018-06-22 19:12:23,084 INFO ]: Without dead ends: 15 [2018-06-22 19:12:23,085 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 19:12:23,085 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 19:12:23,087 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 19:12:23,087 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 19:12:23,088 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 19:12:23,088 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 19:12:23,088 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:23,088 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 19:12:23,088 INFO ]: Interpolant automaton has 8 states. [2018-06-22 19:12:23,088 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 19:12:23,089 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 19:12:23,089 INFO ]: Found error trace [2018-06-22 19:12:23,089 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:23,089 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:23,089 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 19:12:23,089 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:23,089 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:23,090 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:23,090 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 19:12:23,090 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:23,223 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:23,528 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2018-06-22 19:12:23,632 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:12:23,632 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:12:23,632 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 19:12:23,643 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 19:12:23,794 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 19:12:23,794 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:23,800 INFO ]: Computing forward predicates... [2018-06-22 19:12:24,040 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 19:12:24,072 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:12:24,072 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 19:12:24,072 INFO ]: Interpolant automaton has 13 states [2018-06-22 19:12:24,072 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 19:12:24,072 INFO ]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-06-22 19:12:24,073 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 19:12:24,315 WARN ]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2018-06-22 19:12:24,591 WARN ]: Spent 207.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 91 [2018-06-22 19:12:24,788 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:24,788 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 19:12:24,790 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 19:12:24,790 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 19:12:24,790 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:24,791 INFO ]: With dead ends: 17 [2018-06-22 19:12:24,791 INFO ]: Without dead ends: 17 [2018-06-22 19:12:24,791 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:12:24,791 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 19:12:24,795 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 19:12:24,795 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 19:12:24,796 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 19:12:24,796 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 19:12:24,796 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:24,796 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 19:12:24,796 INFO ]: Interpolant automaton has 13 states. [2018-06-22 19:12:24,796 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 19:12:24,797 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 19:12:24,797 INFO ]: Found error trace [2018-06-22 19:12:24,797 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:24,797 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:24,797 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 19:12:24,797 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:24,797 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:24,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:24,798 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:12:24,798 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:24,957 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:25,505 WARN ]: Spent 287.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2018-06-22 19:12:25,725 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2018-06-22 19:12:25,930 WARN ]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2018-06-22 19:12:26,091 WARN ]: Spent 134.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2018-06-22 19:12:26,357 WARN ]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2018-06-22 19:12:26,371 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:12:26,382 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:12:26,382 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 19:12:26,388 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 19:12:26,566 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 19:12:26,566 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:26,571 INFO ]: Computing forward predicates... [2018-06-22 19:12:26,878 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 19:12:26,899 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:12:26,899 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 19:12:26,899 INFO ]: Interpolant automaton has 17 states [2018-06-22 19:12:26,899 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 19:12:26,899 INFO ]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2018-06-22 19:12:26,899 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 19:12:27,142 WARN ]: Spent 200.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 93 [2018-06-22 19:12:27,470 WARN ]: Spent 236.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 88 [2018-06-22 19:12:27,890 WARN ]: Spent 357.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 96 [2018-06-22 19:12:28,104 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2018-06-22 19:12:28,171 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:28,172 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 19:12:28,172 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 19:12:28,172 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 19:12:28,172 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:28,173 INFO ]: With dead ends: 19 [2018-06-22 19:12:28,173 INFO ]: Without dead ends: 19 [2018-06-22 19:12:28,173 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2018-06-22 19:12:28,174 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 19:12:28,176 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 19:12:28,176 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 19:12:28,177 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 19:12:28,177 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 19:12:28,177 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:28,177 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 19:12:28,177 INFO ]: Interpolant automaton has 17 states. [2018-06-22 19:12:28,177 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 19:12:28,178 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 19:12:28,178 INFO ]: Found error trace [2018-06-22 19:12:28,178 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:28,178 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:28,178 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 19:12:28,178 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:28,178 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:28,179 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:28,179 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:12:28,179 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:28,336 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:29,159 WARN ]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2018-06-22 19:12:29,992 WARN ]: Spent 743.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 69 [2018-06-22 19:12:30,911 WARN ]: Spent 804.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 66 [2018-06-22 19:12:31,619 WARN ]: Spent 676.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 80 [2018-06-22 19:12:31,980 WARN ]: Spent 310.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 48 [2018-06-22 19:12:33,024 WARN ]: Spent 978.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 35 [2018-06-22 19:12:33,226 WARN ]: Spent 118.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 50 [2018-06-22 19:12:33,300 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:12:33,300 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:12:33,300 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 19:12:33,305 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 19:12:33,480 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 19:12:33,480 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:33,491 INFO ]: Computing forward predicates... [2018-06-22 19:12:34,204 WARN ]: Spent 113.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2018-06-22 19:12:34,233 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 19:12:34,253 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:12:34,253 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2018-06-22 19:12:34,253 INFO ]: Interpolant automaton has 21 states [2018-06-22 19:12:34,253 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 19:12:34,253 INFO ]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-06-22 19:12:34,253 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 21 states. [2018-06-22 19:12:35,149 WARN ]: Spent 827.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 148 [2018-06-22 19:12:36,376 WARN ]: Spent 1.13 s on a formula simplification. DAG size of input: 252 DAG size of output: 162 [2018-06-22 19:12:37,603 WARN ]: Spent 1.14 s on a formula simplification. DAG size of input: 244 DAG size of output: 165 [2018-06-22 19:12:39,228 WARN ]: Spent 1.56 s on a formula simplification. DAG size of input: 235 DAG size of output: 194 [2018-06-22 19:12:40,025 WARN ]: Spent 729.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 130 [2018-06-22 19:12:40,092 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:40,092 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 19:12:40,095 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 19:12:40,095 INFO ]: Start accepts. Automaton has 21 states. Word has length 25 [2018-06-22 19:12:40,095 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:40,095 INFO ]: With dead ends: 21 [2018-06-22 19:12:40,095 INFO ]: Without dead ends: 21 [2018-06-22 19:12:40,096 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2018-06-22 19:12:40,096 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 19:12:40,099 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 19:12:40,099 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 19:12:40,099 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 19:12:40,099 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 19:12:40,099 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:40,100 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 19:12:40,100 INFO ]: Interpolant automaton has 21 states. [2018-06-22 19:12:40,100 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 19:12:40,100 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 19:12:40,100 INFO ]: Found error trace [2018-06-22 19:12:40,100 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:40,100 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:40,101 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 19:12:40,101 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:40,101 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:40,101 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:40,101 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:12:40,101 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:40,377 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:41,923 WARN ]: Spent 546.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2018-06-22 19:12:42,592 WARN ]: Spent 624.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 52 [2018-06-22 19:12:42,879 WARN ]: Spent 262.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 60 [2018-06-22 19:12:43,995 WARN ]: Spent 1.03 s on a formula simplification. DAG size of input: 263 DAG size of output: 90 [2018-06-22 19:12:44,452 WARN ]: Spent 319.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 57 [2018-06-22 19:12:45,085 WARN ]: Spent 559.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 44 [2018-06-22 19:12:46,433 WARN ]: Spent 1.24 s on a formula simplification. DAG size of input: 346 DAG size of output: 69 [2018-06-22 19:12:47,169 WARN ]: Spent 552.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 41 [2018-06-22 19:12:48,053 WARN ]: Spent 688.00 ms on a formula simplification. DAG size of input: 349 DAG size of output: 17 [2018-06-22 19:12:48,077 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 19:12:48,077 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 19:12:48,077 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 19:12:48,084 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 19:12:48,324 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 19:12:48,324 INFO ]: Conjunction of SSA is unsat [2018-06-22 19:12:48,334 INFO ]: Computing forward predicates... [2018-06-22 19:12:49,391 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2018-06-22 19:12:49,872 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2018-06-22 19:12:50,025 INFO ]: Checked inductivity of 55 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 19:12:50,047 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 19:12:50,047 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-22 19:12:50,047 INFO ]: Interpolant automaton has 24 states [2018-06-22 19:12:50,047 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 19:12:50,047 INFO ]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2018-06-22 19:12:50,047 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 19:12:50,772 WARN ]: Spent 624.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 171 [2018-06-22 19:12:52,058 WARN ]: Spent 1.11 s on a formula simplification. DAG size of input: 305 DAG size of output: 205 [2018-06-22 19:12:53,566 WARN ]: Spent 1.42 s on a formula simplification. DAG size of input: 308 DAG size of output: 224 [2018-06-22 19:12:54,552 WARN ]: Spent 856.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 197 [2018-06-22 19:12:55,328 WARN ]: Spent 695.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 182 [2018-06-22 19:12:56,007 WARN ]: Spent 589.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 158 [2018-06-22 19:12:56,076 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 19:12:56,076 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 19:12:56,077 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 19:12:56,077 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 19:12:56,078 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 19:12:56,078 INFO ]: With dead ends: 23 [2018-06-22 19:12:56,078 INFO ]: Without dead ends: 23 [2018-06-22 19:12:56,079 INFO ]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2018-06-22 19:12:56,079 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 19:12:56,082 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 19:12:56,082 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 19:12:56,083 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 19:12:56,083 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 19:12:56,083 INFO ]: Finished accepts. word is rejected. [2018-06-22 19:12:56,083 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 19:12:56,083 INFO ]: Interpolant automaton has 24 states. [2018-06-22 19:12:56,083 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 19:12:56,084 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 19:12:56,084 INFO ]: Found error trace [2018-06-22 19:12:56,084 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 19:12:56,084 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 19:12:56,084 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 19:12:56,084 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 19:12:56,084 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 19:12:56,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:56,085 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 19:12:56,085 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 19:12:56,651 INFO ]: Conjunction of SSA is unsat Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown