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/speed2_e8_449_e7_353.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:37:08,483 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:37:08,486 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:37:08,501 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:37:08,501 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:37:08,503 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:37:08,504 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:37:08,508 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:37:08,509 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:37:08,511 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:37:08,512 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:37:08,512 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:37:08,513 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:37:08,517 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:37:08,517 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:37:08,518 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:37:08,519 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:37:08,528 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:37:08,530 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:37:08,533 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:37:08,534 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:37:08,537 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:37:08,537 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:37:08,537 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:37:08,538 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:37:08,539 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:37:08,539 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:37:08,543 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:37:08,544 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:37:08,544 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:37:08,545 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:37:08,545 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:37:08,546 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:37:08,551 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:37:08,552 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:37:08,552 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:37:08,571 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:37:08,571 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:37:08,572 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:37:08,572 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:37:08,576 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:37:08,576 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:37:08,576 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:37:08,577 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:37:08,577 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:37:08,577 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:37:08,577 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:37:08,577 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:37:08,578 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:37:08,578 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:37:08,578 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:37:08,578 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:37:08,578 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:37:08,581 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:37:08,581 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:37:08,621 INFO ]: Repository-Root is: /tmp [2018-06-18 16:37:08,640 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:37:08,644 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:37:08,645 INFO ]: Initializing SmtParser... [2018-06-18 16:37:08,646 INFO ]: SmtParser initialized [2018-06-18 16:37:08,646 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 [2018-06-18 16:37:08,648 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 16:37:08,731 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 unknown [2018-06-18 16:37:08,983 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e8_449_e7_353.smt2 [2018-06-18 16:37:08,988 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:37:08,998 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:37:08,998 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:37:08,998 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:37:08,999 INFO ]: ChcToBoogie initialized [2018-06-18 16:37:09,006 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:37:08" (1/1) ... [2018-06-18 16:37:09,074 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09 Unit [2018-06-18 16:37:09,074 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:37:09,075 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:37:09,075 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:37:09,075 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:37:09,098 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,098 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,107 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,108 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,112 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,124 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,125 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (1/1) ... [2018-06-18 16:37:09,127 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:37:09,127 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:37:09,127 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:37:09,127 INFO ]: RCFGBuilder initialized [2018-06-18 16:37:09,128 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (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 16:37:09,146 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:37:09,146 INFO ]: Found specification of procedure False [2018-06-18 16:37:09,146 INFO ]: Found implementation of procedure False [2018-06-18 16:37:09,146 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:37:09,146 INFO ]: Found specification of procedure state [2018-06-18 16:37:09,146 INFO ]: Found implementation of procedure state [2018-06-18 16:37:09,146 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:37:09,146 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:37:09,146 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 16:37:09,510 INFO ]: Using library mode [2018-06-18 16:37:09,510 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:37:09 BoogieIcfgContainer [2018-06-18 16:37:09,510 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:37:09,511 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:37:09,511 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:37:09,516 INFO ]: TraceAbstraction initialized [2018-06-18 16:37:09,517 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:37:08" (1/3) ... [2018-06-18 16:37:09,518 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c248386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:37:09, skipping insertion in model container [2018-06-18 16:37:09,521 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:37:09" (2/3) ... [2018-06-18 16:37:09,522 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c248386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:37:09, skipping insertion in model container [2018-06-18 16:37:09,522 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:37:09" (3/3) ... [2018-06-18 16:37:09,523 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:37:09,533 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:37:09,542 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:37:09,589 INFO ]: Using default assertion order modulation [2018-06-18 16:37:09,589 INFO ]: Interprodecural is true [2018-06-18 16:37:09,589 INFO ]: Hoare is false [2018-06-18 16:37:09,589 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:37:09,589 INFO ]: Backedges is TWOTRACK [2018-06-18 16:37:09,589 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:37:09,589 INFO ]: Difference is false [2018-06-18 16:37:09,589 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:37:09,590 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:37:09,605 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:37:09,616 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:37:09,616 INFO ]: Found error trace [2018-06-18 16:37:09,617 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:37:09,617 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:37:09,623 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-18 16:37:09,624 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:37:09,624 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:37:09,665 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:09,665 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:37:09,665 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:09,720 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:09,730 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:37:09,854 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:37:09,857 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:37:09,857 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:37:09,859 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:37:09,870 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:37:09,870 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:37:09,872 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:37:09,982 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:37:09,982 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:37:09,983 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:37:09,984 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:37:09,984 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:37:09,996 INFO ]: With dead ends: 13 [2018-06-18 16:37:09,996 INFO ]: Without dead ends: 13 [2018-06-18 16:37:09,998 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 [2018-06-18 16:37:10,017 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:37:10,039 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:37:10,040 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:37:10,041 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:37:10,042 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:37:10,042 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:37:10,042 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:37:10,042 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:37:10,042 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:37:10,044 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:37:10,044 INFO ]: Found error trace [2018-06-18 16:37:10,044 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:37:10,044 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:37:10,044 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-18 16:37:10,044 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:37:10,044 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:37:10,045 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:10,045 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:37:10,045 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:10,081 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:10,081 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:37:10,359 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:37:10,359 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:37:10,359 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) [2018-06-18 16:37:10,382 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:37:10,438 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:10,448 INFO ]: Computing forward predicates... [2018-06-18 16:37:10,766 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:37:10,789 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:37:10,789 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:37:10,789 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:37:10,790 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:37:10,790 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:37:10,790 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:37:11,166 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:37:11,167 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:37:11,168 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:37:11,168 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:37:11,169 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:37:11,169 INFO ]: With dead ends: 15 [2018-06-18 16:37:11,169 INFO ]: Without dead ends: 15 [2018-06-18 16:37:11,170 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 16:37:11,170 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:37:11,173 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:37:11,175 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:37:11,175 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:37:11,175 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:37:11,175 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:37:11,175 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:37:11,175 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:37:11,176 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:37:11,176 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:37:11,176 INFO ]: Found error trace [2018-06-18 16:37:11,176 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:37:11,176 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:37:11,197 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-18 16:37:11,197 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:37:11,197 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:37:11,198 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:11,198 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:37:11,198 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:11,261 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:11,262 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:37:11,504 WARN ]: Spent 116.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 19 [2018-06-18 16:37:11,795 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:37:11,795 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:37:11,795 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 16:37:11,807 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:37:11,886 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:37:11,886 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:11,890 INFO ]: Computing forward predicates... [2018-06-18 16:37:11,988 WARN ]: expecting exponential blowup for input size 9 [2018-06-18 16:37:13,796 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:37:13,818 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:37:13,818 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:37:13,818 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:37:13,818 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:37:13,819 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:37:13,819 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:37:13,975 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2018-06-18 16:37:14,251 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:37:14,251 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:37:14,251 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:37:14,251 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:37:14,251 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:37:14,252 INFO ]: With dead ends: 17 [2018-06-18 16:37:14,252 INFO ]: Without dead ends: 17 [2018-06-18 16:37:14,252 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:37:14,252 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:37:14,255 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:37:14,255 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:37:14,256 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:37:14,256 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:37:14,256 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:37:14,256 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:37:14,256 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:37:14,256 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:37:14,257 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:37:14,257 INFO ]: Found error trace [2018-06-18 16:37:14,257 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:37:14,257 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:37:14,257 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-18 16:37:14,257 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:37:14,257 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:37:14,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:14,258 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:37:14,258 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:37:14,295 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:14,296 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:37:14,469 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 16:37:14,469 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:37:14,469 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 [2018-06-18 16:37:14,484 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:37:14,589 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:37:14,589 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:37:14,595 INFO ]: Computing forward predicates... [2018-06-18 16:37:14,723 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:37:14,767 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:37:14,817 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:37:14,829 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:37:14,847 WARN ]: expecting exponential blowup for input size 12 [2018-06-18 16:37:14,951 WARN ]: Simplifying disjunction of 9216 conjuctions. This might take some time... [2018-06-18 16:37:18,222 INFO ]: Simplified to disjunction of 4096 conjuctions. [2018-06-18 16:37:18,880 WARN ]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 27 [2018-06-18 16:37:19,087 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:37:19,108 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:37:19,108 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-06-18 16:37:19,109 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:37:19,109 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:37:19,109 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:37:19,109 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-18 16:37:19,348 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2018-06-18 16:37:19,578 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:37:19,578 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:37:19,578 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:37:19,578 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-18 16:37:19,578 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:37:19,578 INFO ]: With dead ends: 13 [2018-06-18 16:37:19,578 INFO ]: Without dead ends: 0 [2018-06-18 16:37:19,579 INFO ]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:37:19,579 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 16:37:19,579 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 16:37:19,579 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 16:37:19,579 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 16:37:19,579 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 16:37:19,579 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:37:19,579 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 16:37:19,579 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:37:19,579 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 16:37:19,579 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 16:37:19,584 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:37:19 BoogieIcfgContainer [2018-06-18 16:37:19,584 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:37:19,585 INFO ]: Toolchain (without parser) took 10596.39 ms. Allocated memory was 308.8 MB in the beginning and 552.6 MB in the end (delta: 243.8 MB). Free memory was 261.2 MB in the beginning and 200.1 MB in the end (delta: 61.1 MB). Peak memory consumption was 304.9 MB. Max. memory is 3.6 GB. [2018-06-18 16:37:19,586 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:37:19,586 INFO ]: ChcToBoogie took 76.35 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:37:19,587 INFO ]: Boogie Preprocessor took 51.37 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 16:37:19,587 INFO ]: RCFGBuilder took 383.27 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 245.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:37:19,588 INFO ]: TraceAbstraction took 10072.74 ms. Allocated memory was 308.8 MB in the beginning and 552.6 MB in the end (delta: 243.8 MB). Free memory was 245.2 MB in the beginning and 200.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 288.9 MB. Max. memory is 3.6 GB. [2018-06-18 16:37:19,591 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 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 76.35 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 258.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 51.37 ms. Allocated memory is still 308.8 MB. Free memory was 258.2 MB in the beginning and 257.2 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 383.27 ms. Allocated memory is still 308.8 MB. Free memory was 257.2 MB in the beginning and 245.2 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 10072.74 ms. Allocated memory was 308.8 MB in the beginning and 552.6 MB in the end (delta: 243.8 MB). Free memory was 245.2 MB in the beginning and 200.1 MB in the end (delta: 45.1 MB). Peak memory consumption was 288.9 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. SAFE Result, 10.0s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 30 SDslu, 105 SDs, 0 SdLazy, 91 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 9324 SizeOfPredicates, 74 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 90 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449_e7_353.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-37-19-607.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e8_449_e7_353.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-37-19-607.csv Received shutdown request...