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/cav12/mem_slave_tlm.5.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:08:22,283 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:08:22,285 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:08:22,299 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:08:22,299 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:08:22,300 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:08:22,301 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:08:22,306 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:08:22,308 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:08:22,309 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:08:22,310 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:08:22,310 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:08:22,311 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:08:22,312 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:08:22,313 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:08:22,314 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:08:22,316 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:08:22,318 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:08:22,319 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:08:22,321 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:08:22,322 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:08:22,324 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:08:22,325 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:08:22,325 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:08:22,326 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:08:22,327 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:08:22,328 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:08:22,328 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:08:22,330 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:08:22,330 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:08:22,331 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:08:22,331 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:08:22,332 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:08:22,332 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:08:22,333 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:08:22,334 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 14:08:22,350 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:08:22,350 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:08:22,350 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:08:22,350 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:08:22,352 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:08:22,352 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:08:22,352 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:08:22,352 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:08:22,352 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:08:22,353 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:08:22,353 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:08:22,353 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:08:22,353 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:08:22,353 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:08:22,354 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:08:22,354 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:08:22,354 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:08:22,354 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:08:22,354 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:08:22,357 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:08:22,357 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:08:22,412 INFO ]: Repository-Root is: /tmp [2018-06-22 14:08:22,425 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:08:22,429 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:08:22,430 INFO ]: Initializing SmtParser... [2018-06-22 14:08:22,431 INFO ]: SmtParser initialized [2018-06-22 14:08:22,431 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.5.smt2 [2018-06-22 14:08:22,432 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 14:08:22,507 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.5.smt2 unknown [2018-06-22 14:08:23,328 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/mem_slave_tlm.5.smt2 [2018-06-22 14:08:23,332 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:08:23,346 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:08:23,346 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:08:23,346 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:08:23,347 INFO ]: ChcToBoogie initialized [2018-06-22 14:08:23,349 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,449 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23 Unit [2018-06-22 14:08:23,449 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:08:23,450 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:08:23,450 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:08:23,450 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:08:23,472 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,472 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,499 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,499 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,519 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,520 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,526 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (1/1) ... [2018-06-22 14:08:23,534 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:08:23,534 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:08:23,534 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:08:23,534 INFO ]: RCFGBuilder initialized [2018-06-22 14:08:23,535 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (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 14:08:23,544 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:08:23,544 INFO ]: Found specification of procedure False [2018-06-22 14:08:23,544 INFO ]: Found implementation of procedure False [2018-06-22 14:08:23,545 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:08:23,545 INFO ]: Found specification of procedure state [2018-06-22 14:08:23,545 INFO ]: Found implementation of procedure state [2018-06-22 14:08:23,545 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:08:23,545 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:08:23,545 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 14:08:24,123 INFO ]: Using library mode [2018-06-22 14:08:24,123 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:08:24 BoogieIcfgContainer [2018-06-22 14:08:24,124 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:08:24,127 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:08:24,127 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:08:24,134 INFO ]: TraceAbstraction initialized [2018-06-22 14:08:24,134 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:08:23" (1/3) ... [2018-06-22 14:08:24,135 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcb0802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:08:24, skipping insertion in model container [2018-06-22 14:08:24,135 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:08:23" (2/3) ... [2018-06-22 14:08:24,135 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bcb0802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:08:24, skipping insertion in model container [2018-06-22 14:08:24,135 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:08:24" (3/3) ... [2018-06-22 14:08:24,138 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:08:24,148 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:08:24,158 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:08:24,207 INFO ]: Using default assertion order modulation [2018-06-22 14:08:24,208 INFO ]: Interprodecural is true [2018-06-22 14:08:24,208 INFO ]: Hoare is false [2018-06-22 14:08:24,208 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:08:24,208 INFO ]: Backedges is TWOTRACK [2018-06-22 14:08:24,208 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:08:24,208 INFO ]: Difference is false [2018-06-22 14:08:24,208 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:08:24,208 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:08:24,226 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:08:24,241 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:08:24,241 INFO ]: Found error trace [2018-06-22 14:08:24,242 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:24,242 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:24,247 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 14:08:24,249 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:24,250 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:24,296 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:24,296 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:24,297 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:24,356 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:24,511 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:08:24,513 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:08:24,513 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:08:24,515 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:08:24,532 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:08:24,532 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:08:24,538 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:08:24,721 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:24,722 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:08:24,723 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:08:24,725 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:08:24,725 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:24,738 INFO ]: With dead ends: 13 [2018-06-22 14:08:24,738 INFO ]: Without dead ends: 13 [2018-06-22 14:08:24,742 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 14:08:24,759 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:08:24,795 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:08:24,797 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:08:24,797 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:08:24,799 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:08:24,799 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:24,799 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:08:24,799 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:08:24,799 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:08:24,800 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:08:24,800 INFO ]: Found error trace [2018-06-22 14:08:24,800 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:24,800 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:24,801 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 14:08:24,801 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:24,801 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:24,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:24,802 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:24,802 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:25,021 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:25,445 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:08:25,445 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:25,445 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 14:08:25,453 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:25,597 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:25,612 INFO ]: Computing forward predicates... [2018-06-22 14:08:27,353 WARN ]: Spent 1.21 s on a formula simplification. DAG size of input: 49 DAG size of output: 27 [2018-06-22 14:08:27,718 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:08:27,742 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:27,742 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-06-22 14:08:27,743 INFO ]: Interpolant automaton has 9 states [2018-06-22 14:08:27,743 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 14:08:27,743 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 14:08:27,743 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 9 states. [2018-06-22 14:08:28,078 WARN ]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2018-06-22 14:08:28,401 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:28,401 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:08:28,402 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:08:28,402 INFO ]: Start accepts. Automaton has 9 states. Word has length 13 [2018-06-22 14:08:28,402 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:28,403 INFO ]: With dead ends: 15 [2018-06-22 14:08:28,403 INFO ]: Without dead ends: 15 [2018-06-22 14:08:28,404 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:08:28,404 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:08:28,406 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:08:28,406 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:08:28,406 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:08:28,406 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:08:28,407 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:28,407 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:08:28,407 INFO ]: Interpolant automaton has 9 states. [2018-06-22 14:08:28,407 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:08:28,407 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:08:28,407 INFO ]: Found error trace [2018-06-22 14:08:28,407 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:28,407 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:28,407 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 14:08:28,407 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:28,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:28,408 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:28,408 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:08:28,408 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:28,560 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:29,094 WARN ]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:08:29,131 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:08:29,131 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:29,131 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) [2018-06-22 14:08:29,146 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:08:29,284 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:08:29,284 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:29,294 INFO ]: Computing forward predicates... [2018-06-22 14:08:29,803 WARN ]: Spent 344.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2018-06-22 14:08:30,827 WARN ]: Spent 788.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2018-06-22 14:08:31,070 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:08:31,102 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:31,102 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 14:08:31,103 INFO ]: Interpolant automaton has 12 states [2018-06-22 14:08:31,103 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 14:08:31,103 INFO ]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2018-06-22 14:08:31,103 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 14:08:31,762 WARN ]: Spent 610.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2018-06-22 14:08:32,641 WARN ]: Spent 715.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2018-06-22 14:08:32,679 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:32,679 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:08:32,680 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:08:32,680 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 14:08:32,680 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:32,680 INFO ]: With dead ends: 17 [2018-06-22 14:08:32,680 INFO ]: Without dead ends: 17 [2018-06-22 14:08:32,681 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:08:32,681 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:08:32,682 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:08:32,682 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:08:32,683 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:08:32,683 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:08:32,683 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:32,683 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:08:32,683 INFO ]: Interpolant automaton has 12 states. [2018-06-22 14:08:32,683 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:08:32,683 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:08:32,683 INFO ]: Found error trace [2018-06-22 14:08:32,683 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:32,683 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:32,683 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 14:08:32,683 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:32,684 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:32,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:32,686 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:32,686 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:32,883 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:33,434 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:08:33,434 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:33,434 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 14:08:33,442 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:08:33,633 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:08:33,633 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:33,646 INFO ]: Computing forward predicates... [2018-06-22 14:08:34,072 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2018-06-22 14:08:35,190 WARN ]: Spent 706.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2018-06-22 14:08:36,303 WARN ]: Spent 942.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2018-06-22 14:08:36,398 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:08:36,419 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:36,419 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:08:36,420 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:08:36,420 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:08:36,420 INFO ]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:08:36,420 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:08:37,089 WARN ]: Spent 618.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 101 [2018-06-22 14:08:37,275 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 37 [2018-06-22 14:08:37,473 WARN ]: Spent 157.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 24 [2018-06-22 14:08:38,018 WARN ]: Spent 508.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 93 [2018-06-22 14:08:38,101 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:38,101 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:08:38,102 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:08:38,102 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:08:38,103 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:38,103 INFO ]: With dead ends: 19 [2018-06-22 14:08:38,103 INFO ]: Without dead ends: 19 [2018-06-22 14:08:38,103 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:08:38,104 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:08:38,106 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:08:38,106 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:08:38,107 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:08:38,107 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:08:38,107 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:38,107 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:08:38,107 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:08:38,107 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:08:38,109 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:08:38,109 INFO ]: Found error trace [2018-06-22 14:08:38,109 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:38,109 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:38,109 INFO ]: Analyzing trace with hash -434924750, now seen corresponding path program 4 times [2018-06-22 14:08:38,109 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:38,109 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:38,110 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:38,110 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:38,110 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:38,320 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:39,127 WARN ]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:08:39,297 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2018-06-22 14:08:39,501 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:08:39,502 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:39,502 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 14:08:39,507 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:08:39,807 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:08:39,807 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:39,827 INFO ]: Computing forward predicates... [2018-06-22 14:08:40,158 WARN ]: Spent 228.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 23 [2018-06-22 14:08:40,834 WARN ]: Spent 576.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 51 [2018-06-22 14:08:42,833 WARN ]: Spent 1.82 s on a formula simplification. DAG size of input: 120 DAG size of output: 106 [2018-06-22 14:08:44,729 WARN ]: Spent 1.80 s on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2018-06-22 14:08:44,905 INFO ]: Checked inductivity of 36 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:08:44,925 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:08:44,925 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 14:08:44,925 INFO ]: Interpolant automaton has 19 states [2018-06-22 14:08:44,926 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 14:08:44,926 INFO ]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:08:44,926 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 14:08:47,004 WARN ]: Spent 1.99 s on a formula simplification. DAG size of input: 229 DAG size of output: 203 [2018-06-22 14:08:47,275 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 37 [2018-06-22 14:08:47,564 WARN ]: Spent 239.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 42 [2018-06-22 14:08:48,319 WARN ]: Spent 696.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 79 [2018-06-22 14:08:51,075 WARN ]: Spent 2.67 s on a formula simplification. DAG size of input: 230 DAG size of output: 199 [2018-06-22 14:08:51,141 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:08:51,141 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:08:51,143 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:08:51,143 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 14:08:51,143 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:08:51,143 INFO ]: With dead ends: 21 [2018-06-22 14:08:51,143 INFO ]: Without dead ends: 21 [2018-06-22 14:08:51,144 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=131, Invalid=421, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:08:51,144 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:08:51,148 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:08:51,148 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:08:51,149 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:08:51,149 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:08:51,149 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:08:51,149 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:08:51,149 INFO ]: Interpolant automaton has 19 states. [2018-06-22 14:08:51,149 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:08:51,150 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:08:51,150 INFO ]: Found error trace [2018-06-22 14:08:51,150 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:08:51,150 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:08:51,150 INFO ]: Analyzing trace with hash 1986427350, now seen corresponding path program 5 times [2018-06-22 14:08:51,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:08:51,150 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:08:51,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:51,151 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:08:51,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:08:51,428 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:52,302 WARN ]: Spent 323.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2018-06-22 14:08:52,636 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2018-06-22 14:08:52,829 WARN ]: Spent 182.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2018-06-22 14:08:53,194 WARN ]: Spent 138.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2018-06-22 14:08:53,229 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:08:53,229 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:08:53,229 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 14:08:53,236 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:08:53,630 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:08:53,630 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:08:53,655 INFO ]: Computing forward predicates... [2018-06-22 14:08:54,218 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2018-06-22 14:08:55,304 WARN ]: Spent 888.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2018-06-22 14:08:56,840 WARN ]: Spent 1.39 s on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2018-06-22 14:08:58,783 WARN ]: Spent 1.76 s on a formula simplification. DAG size of input: 120 DAG size of output: 106 [2018-06-22 14:09:00,551 WARN ]: Spent 1.57 s on a formula simplification. DAG size of input: 113 DAG size of output: 94 [2018-06-22 14:09:00,935 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:09:00,957 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:09:00,957 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2018-06-22 14:09:00,957 INFO ]: Interpolant automaton has 24 states [2018-06-22 14:09:00,958 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 14:09:00,958 INFO ]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:09:00,958 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 24 states. [2018-06-22 14:09:04,308 WARN ]: Spent 3.24 s on a formula simplification. DAG size of input: 325 DAG size of output: 218 [2018-06-22 14:09:04,673 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 38 [2018-06-22 14:09:05,141 WARN ]: Spent 392.00 ms on a formula simplification. DAG size of input: 320 DAG size of output: 42 [2018-06-22 14:09:05,803 WARN ]: Spent 553.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 65 [2018-06-22 14:09:06,412 WARN ]: Spent 509.00 ms on a formula simplification. DAG size of input: 312 DAG size of output: 46 [2018-06-22 14:09:09,468 WARN ]: Spent 2.90 s on a formula simplification. DAG size of input: 324 DAG size of output: 207 [2018-06-22 14:09:09,655 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:09:09,655 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:09:09,656 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:09:09,656 INFO ]: Start accepts. Automaton has 24 states. Word has length 29 [2018-06-22 14:09:09,656 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:09:09,657 INFO ]: With dead ends: 23 [2018-06-22 14:09:09,657 INFO ]: Without dead ends: 23 [2018-06-22 14:09:09,657 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2018-06-22 14:09:09,657 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:09:09,660 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:09:09,660 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:09:09,661 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:09:09,661 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:09:09,661 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:09:09,661 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:09:09,661 INFO ]: Interpolant automaton has 24 states. [2018-06-22 14:09:09,661 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:09:09,662 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:09:09,662 INFO ]: Found error trace [2018-06-22 14:09:09,662 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:09:09,662 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:09:09,662 INFO ]: Analyzing trace with hash 800064122, now seen corresponding path program 6 times [2018-06-22 14:09:09,662 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:09:09,662 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:09:09,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:09:09,663 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:09:09,663 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:09:09,996 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:09:10,779 WARN ]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:09:10,954 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2018-06-22 14:09:11,302 WARN ]: Spent 333.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 76 [2018-06-22 14:09:11,506 WARN ]: Spent 186.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2018-06-22 14:09:11,879 WARN ]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2018-06-22 14:09:12,011 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2018-06-22 14:09:12,059 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:09:12,060 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:09:12,060 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:09:12,065 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:09:12,425 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:09:12,425 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:09:12,446 INFO ]: Computing forward predicates... [2018-06-22 14:09:13,015 WARN ]: Spent 470.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2018-06-22 14:09:14,327 WARN ]: Spent 982.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2018-06-22 14:09:17,069 WARN ]: Spent 2.56 s on a formula simplification. DAG size of input: 108 DAG size of output: 98 [2018-06-22 14:09:19,542 WARN ]: Spent 2.36 s on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2018-06-22 14:09:22,120 WARN ]: Spent 2.41 s on a formula simplification. DAG size of input: 153 DAG size of output: 131 [2018-06-22 14:09:24,228 WARN ]: Spent 1.95 s on a formula simplification. DAG size of input: 133 DAG size of output: 112 [2018-06-22 14:09:25,143 INFO ]: Checked inductivity of 78 backedges. 3 proven. 54 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:09:25,170 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:09:25,170 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2018-06-22 14:09:25,170 INFO ]: Interpolant automaton has 28 states [2018-06-22 14:09:25,170 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 14:09:25,170 INFO ]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2018-06-22 14:09:25,171 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 28 states. Received shutdown request... [2018-06-22 14:09:25,379 WARN ]: Removed 5 from assertion stack [2018-06-22 14:09:25,379 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 14:09:25,379 WARN ]: Verification canceled [2018-06-22 14:09:25,384 WARN ]: Timeout [2018-06-22 14:09:25,385 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:09:25 BoogieIcfgContainer [2018-06-22 14:09:25,385 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:09:25,386 INFO ]: Toolchain (without parser) took 62053.18 ms. Allocated memory was 325.1 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 297.5 MB in the beginning and 824.5 MB in the end (delta: -527.0 MB). Peak memory consumption was 506.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:25,386 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:09:25,387 INFO ]: ChcToBoogie took 103.09 ms. Allocated memory is still 325.1 MB. Free memory was 297.5 MB in the beginning and 293.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:25,387 INFO ]: Boogie Preprocessor took 83.82 ms. Allocated memory is still 325.1 MB. Free memory was 293.6 MB in the beginning and 290.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:25,388 INFO ]: RCFGBuilder took 589.43 ms. Allocated memory is still 325.1 MB. Free memory was 290.5 MB in the beginning and 221.1 MB in the end (delta: 69.4 MB). Peak memory consumption was 69.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:25,388 INFO ]: TraceAbstraction took 61258.19 ms. Allocated memory was 325.1 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 221.1 MB in the beginning and 824.5 MB in the end (delta: -603.4 MB). Peak memory consumption was 430.5 MB. Max. memory is 3.6 GB. [2018-06-22 14:09:25,390 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.2 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 103.09 ms. Allocated memory is still 325.1 MB. Free memory was 297.5 MB in the beginning and 293.6 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 83.82 ms. Allocated memory is still 325.1 MB. Free memory was 293.6 MB in the beginning and 290.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 589.43 ms. Allocated memory is still 325.1 MB. Free memory was 290.5 MB in the beginning and 221.1 MB in the end (delta: 69.4 MB). Peak memory consumption was 69.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 61258.19 ms. Allocated memory was 325.1 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 221.1 MB in the beginning and 824.5 MB in the end (delta: -603.4 MB). Peak memory consumption was 430.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (23states) and interpolant automaton (currently 3 states, 28 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 381. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 61.1s OverallTime, 7 OverallIterations, 7 TraceHistogramMax, 19.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 77 SDtfs, 148 SDslu, 314 SDs, 0 SdLazy, 280 SolverSat, 183 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 224 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 50.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 38.5s InterpolantComputationTime, 285 NumberOfCodeBlocks, 285 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 424104 SizeOfPredicates, 5000 NumberOfNonLiveVariables, 3936 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 117/406 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/mem_slave_tlm.5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-09-25-410.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/mem_slave_tlm.5.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-09-25-410.csv Completed graceful shutdown