java -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/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:28:06,389 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:28:06,391 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:28:06,403 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:28:06,403 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:28:06,404 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:28:06,405 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:28:06,409 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:28:06,420 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:28:06,421 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:28:06,422 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:28:06,422 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:28:06,423 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:28:06,424 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:28:06,424 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:28:06,427 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:28:06,428 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:28:06,431 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:28:06,433 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:28:06,434 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:28:06,435 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:28:06,440 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:28:06,441 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:28:06,441 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:28:06,442 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:28:06,442 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:28:06,443 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:28:06,444 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:28:06,445 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:28:06,445 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:28:06,445 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:28:06,446 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:28:06,446 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:28:06,450 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:28:06,451 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:28:06,451 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:28:06,478 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:28:06,479 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:28:06,479 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:28:06,479 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:28:06,481 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:28:06,482 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:28:06,482 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:28:06,482 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:28:06,482 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:28:06,482 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:28:06,483 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:28:06,484 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:28:06,488 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:28:06,489 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:28:06,547 INFO ]: Repository-Root is: /tmp [2018-06-18 16:28:06,565 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:28:06,571 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:28:06,573 INFO ]: Initializing SmtParser... [2018-06-18 16:28:06,573 INFO ]: SmtParser initialized [2018-06-18 16:28:06,574 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2 [2018-06-18 16:28:06,575 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 [2018-06-18 16:28:06,670 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2 unknown [2018-06-18 16:28:07,060 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2 [2018-06-18 16:28:07,065 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:28:07,080 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:28:07,080 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:28:07,080 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:28:07,080 INFO ]: ChcToBoogie initialized [2018-06-18 16:28:07,096 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,192 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07 Unit [2018-06-18 16:28:07,192 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:28:07,193 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:28:07,193 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:28:07,193 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:28:07,239 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,239 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,253 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,253 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,270 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,271 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,273 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (1/1) ... [2018-06-18 16:28:07,274 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:28:07,275 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:28:07,275 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:28:07,275 INFO ]: RCFGBuilder initialized [2018-06-18 16:28:07,276 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (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) [2018-06-18 16:28:07,287 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:28:07,287 INFO ]: Found specification of procedure False [2018-06-18 16:28:07,287 INFO ]: Found implementation of procedure False [2018-06-18 16:28:07,287 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:28:07,287 INFO ]: Found specification of procedure state [2018-06-18 16:28:07,287 INFO ]: Found implementation of procedure state [2018-06-18 16:28:07,287 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:28:07,287 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:28:07,287 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 [2018-06-18 16:28:07,620 INFO ]: Using library mode [2018-06-18 16:28:07,620 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:28:07 BoogieIcfgContainer [2018-06-18 16:28:07,620 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:28:07,622 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:28:07,622 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:28:07,625 INFO ]: TraceAbstraction initialized [2018-06-18 16:28:07,625 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:28:07" (1/3) ... [2018-06-18 16:28:07,626 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a442bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:28:07, skipping insertion in model container [2018-06-18 16:28:07,626 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:28:07" (2/3) ... [2018-06-18 16:28:07,627 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a442bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:28:07, skipping insertion in model container [2018-06-18 16:28:07,627 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:28:07" (3/3) ... [2018-06-18 16:28:07,629 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:28:07,639 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:28:07,651 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:28:07,702 INFO ]: Using default assertion order modulation [2018-06-18 16:28:07,703 INFO ]: Interprodecural is true [2018-06-18 16:28:07,703 INFO ]: Hoare is false [2018-06-18 16:28:07,703 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:28:07,703 INFO ]: Backedges is TWOTRACK [2018-06-18 16:28:07,703 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:28:07,703 INFO ]: Difference is false [2018-06-18 16:28:07,703 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:28:07,703 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:28:07,720 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:28:07,729 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:28:07,729 INFO ]: Found error trace [2018-06-18 16:28:07,731 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:28:07,731 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:28:07,735 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:28:07,736 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:28:07,737 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:28:07,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:07,773 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:28:07,773 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:07,850 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:28:07,859 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:28:08,120 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:28:08,122 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:28:08,122 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:28:08,124 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:28:08,135 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:28:08,135 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:28:08,137 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:28:08,254 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:28:08,254 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:28:08,256 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:28:08,257 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:28:08,258 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:28:08,269 INFO ]: With dead ends: 13 [2018-06-18 16:28:08,269 INFO ]: Without dead ends: 13 [2018-06-18 16:28:08,273 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:28:08,286 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:28:08,307 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:28:08,308 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:28:08,309 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:28:08,310 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:28:08,311 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:28:08,311 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:28:08,311 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:28:08,311 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:28:08,312 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:28:08,312 INFO ]: Found error trace [2018-06-18 16:28:08,312 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:28:08,312 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:28:08,313 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:28:08,313 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:28:08,313 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:28:08,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:08,314 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:28:08,314 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:08,423 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:28:08,423 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:28:09,950 WARN ]: Spent 1.27 s on a formula simplification. DAG size of input: 88 DAG size of output: 54 [2018-06-18 16:28:10,087 WARN ]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-18 16:28:10,312 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 1 [2018-06-18 16:28:10,313 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:28:10,314 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:28:10,314 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 [2018-06-18 16:28:10,326 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:28:10,416 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:28:10,428 INFO ]: Computing forward predicates... [2018-06-18 16:28:10,671 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:28:12,331 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:28:12,367 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:28:12,367 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:28:12,367 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:28:12,368 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:28:12,368 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:28:12,368 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:28:12,582 WARN ]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2018-06-18 16:28:12,846 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:28:12,846 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:28:12,846 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:28:12,846 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:28:12,847 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:28:12,847 INFO ]: With dead ends: 15 [2018-06-18 16:28:12,847 INFO ]: Without dead ends: 15 [2018-06-18 16:28:12,848 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-18 16:28:12,848 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:28:12,851 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:28:12,851 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:28:12,852 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:28:12,852 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:28:12,852 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:28:12,852 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:28:12,852 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:28:12,852 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:28:12,852 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:28:12,852 INFO ]: Found error trace [2018-06-18 16:28:12,852 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:28:12,853 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:28:12,853 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:28:12,853 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:28:12,853 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:28:12,854 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:12,854 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:28:12,854 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:28:12,957 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:28:12,958 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:28:13,304 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2018-06-18 16:28:13,587 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2018-06-18 16:28:13,705 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:28:13,705 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:28:13,705 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 [2018-06-18 16:28:13,723 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:28:13,785 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:28:13,785 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:28:13,791 INFO ]: Computing forward predicates... [2018-06-18 16:28:14,206 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:28:14,422 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:28:14,495 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:28:14,537 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:28:14,606 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:28:14,656 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:28:14,676 WARN ]: expecting exponential blowup for input size 12 [2018-06-18 16:28:14,859 WARN ]: Simplifying disjunction of 15552 conjuctions. This might take some time... [2018-06-18 16:28:46,989 INFO ]: Simplified to disjunction of 15552 conjuctions. [2018-06-18 16:28:47,059 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:28:47,082 WARN ]: expecting exponential blowup for input size 8 [2018-06-18 16:28:47,115 WARN ]: expecting exponential blowup for input size 12 [2018-06-18 16:28:47,236 WARN ]: Simplifying disjunction of 25920 conjuctions. This might take some time... Received shutdown request... [2018-06-18 16:29:24,891 INFO ]: Timeout while computing interpolants [2018-06-18 16:29:25,092 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:29:25,092 WARN ]: Verification canceled [2018-06-18 16:29:25,100 WARN ]: Timeout [2018-06-18 16:29:25,101 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:29:25 BoogieIcfgContainer [2018-06-18 16:29:25,101 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:29:25,102 INFO ]: Toolchain (without parser) took 78035.92 ms. Allocated memory was 307.8 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 255.3 MB in the beginning and 279.9 MB in the end (delta: -24.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 16:29:25,103 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:29:25,103 INFO ]: ChcToBoogie took 112.47 ms. Allocated memory is still 307.8 MB. Free memory was 255.3 MB in the beginning and 252.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:29:25,104 INFO ]: Boogie Preprocessor took 81.55 ms. Allocated memory is still 307.8 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:29:25,108 INFO ]: RCFGBuilder took 345.26 ms. Allocated memory is still 307.8 MB. Free memory was 250.3 MB in the beginning and 233.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:29:25,108 INFO ]: TraceAbstraction took 77479.16 ms. Allocated memory was 307.8 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 233.3 MB in the beginning and 279.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-18 16:29:25,118 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 307.8 MB. Free memory is still 273.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 112.47 ms. Allocated memory is still 307.8 MB. Free memory was 255.3 MB in the beginning and 252.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 81.55 ms. Allocated memory is still 307.8 MB. Free memory was 252.3 MB in the beginning and 250.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 345.26 ms. Allocated memory is still 307.8 MB. Free memory was 250.3 MB in the beginning and 233.3 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 77479.16 ms. Allocated memory was 307.8 MB in the beginning and 1.4 GB in the end (delta: 1.1 GB). Free memory was 233.3 MB in the beginning and 279.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 1.1 GB. 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 analyzing trace of length 18 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 25920 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 77.4s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 22 SDtfs, 6 SDslu, 53 SDs, 0 SdLazy, 37 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2376 SizeOfPredicates, 38 NumberOfNonLiveVariables, 322 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 2/6 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/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-29-25-129.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/PRODUCER_CONSUMER_vt_e7_1059_e8_1111.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-29-25-129.csv Completed graceful shutdown