java -Xss4m -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_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 16:05:21,949 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 16:05:21,951 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 16:05:21,966 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 16:05:21,966 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 16:05:21,967 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 16:05:21,969 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 16:05:21,973 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 16:05:21,975 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 16:05:21,977 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 16:05:21,978 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 16:05:21,978 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 16:05:21,979 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 16:05:21,981 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 16:05:21,985 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 16:05:21,986 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 16:05:21,999 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 16:05:22,001 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 16:05:22,003 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 16:05:22,004 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 16:05:22,005 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 16:05:22,007 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 16:05:22,007 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 16:05:22,008 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 16:05:22,012 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 16:05:22,013 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 16:05:22,014 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 16:05:22,014 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 16:05:22,016 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 16:05:22,016 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 16:05:22,017 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 16:05:22,018 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 16:05:22,018 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 16:05:22,019 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 16:05:22,027 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 16:05:22,027 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 16:05:22,050 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 16:05:22,051 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 16:05:22,051 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 16:05:22,051 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 16:05:22,052 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 16:05:22,053 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 16:05:22,053 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 16:05:22,053 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 16:05:22,053 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 16:05:22,053 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 16:05:22,056 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 16:05:22,057 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 16:05:22,057 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:05:22,057 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 16:05:22,057 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 16:05:22,058 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 16:05:22,061 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 16:05:22,061 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 16:05:22,110 INFO ]: Repository-Root is: /tmp [2018-06-25 16:05:22,129 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 16:05:22,135 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 16:05:22,137 INFO ]: Initializing SmtParser... [2018-06-25 16:05:22,137 INFO ]: SmtParser initialized [2018-06-25 16:05:22,138 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 [2018-06-25 16:05:22,139 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 [2018-06-25 16:05:22,239 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 unknown [2018-06-25 16:05:22,530 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 [2018-06-25 16:05:22,543 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 16:05:22,549 INFO ]: Walking toolchain with 4 elements. [2018-06-25 16:05:22,550 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 16:05:22,550 INFO ]: Initializing ChcToBoogie... [2018-06-25 16:05:22,550 INFO ]: ChcToBoogie initialized [2018-06-25 16:05:22,553 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,623 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22 Unit [2018-06-25 16:05:22,623 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 16:05:22,624 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 16:05:22,624 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 16:05:22,624 INFO ]: Boogie Preprocessor initialized [2018-06-25 16:05:22,647 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,647 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,655 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,655 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,666 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,667 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,669 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (1/1) ... [2018-06-25 16:05:22,671 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 16:05:22,672 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 16:05:22,672 INFO ]: Initializing RCFGBuilder... [2018-06-25 16:05:22,672 INFO ]: RCFGBuilder initialized [2018-06-25 16:05:22,679 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 16:05:22,689 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 16:05:22,689 INFO ]: Found specification of procedure gotoProc [2018-06-25 16:05:22,689 INFO ]: Found implementation of procedure gotoProc [2018-06-25 16:05:22,689 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 16:05:22,689 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 16:05:22,689 INFO ]: Found implementation of procedure Ultimate.START [2018-06-25 16:05:23,003 INFO ]: Using library mode [2018-06-25 16:05:23,004 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:05:23 BoogieIcfgContainer [2018-06-25 16:05:23,004 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 16:05:23,005 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 16:05:23,005 INFO ]: Initializing TraceAbstraction... [2018-06-25 16:05:23,009 INFO ]: TraceAbstraction initialized [2018-06-25 16:05:23,009 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 04:05:22" (1/3) ... [2018-06-25 16:05:23,010 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2318cd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 04:05:23, skipping insertion in model container [2018-06-25 16:05:23,010 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 04:05:22" (2/3) ... [2018-06-25 16:05:23,010 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2318cd5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 04:05:23, skipping insertion in model container [2018-06-25 16:05:23,010 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 04:05:23" (3/3) ... [2018-06-25 16:05:23,012 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 16:05:23,022 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 16:05:23,042 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 16:05:23,098 INFO ]: Using default assertion order modulation [2018-06-25 16:05:23,099 INFO ]: Interprodecural is true [2018-06-25 16:05:23,099 INFO ]: Hoare is false [2018-06-25 16:05:23,099 INFO ]: Compute interpolants for FPandBP [2018-06-25 16:05:23,099 INFO ]: Backedges is TWOTRACK [2018-06-25 16:05:23,099 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 16:05:23,099 INFO ]: Difference is false [2018-06-25 16:05:23,099 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 16:05:23,099 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 16:05:23,117 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 16:05:23,135 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 16:05:23,135 INFO ]: Found error trace [2018-06-25 16:05:23,136 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:05:23,136 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:05:23,145 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-25 16:05:23,148 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:05:23,148 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:05:23,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:23,185 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:05:23,185 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:23,253 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:23,332 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:05:23,335 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 16:05:23,335 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 16:05:23,338 INFO ]: Interpolant automaton has 3 states [2018-06-25 16:05:23,349 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 16:05:23,349 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:05:23,351 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 16:05:23,440 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:05:23,441 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 16:05:23,441 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 16:05:23,443 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 16:05:23,443 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:05:23,452 INFO ]: With dead ends: 9 [2018-06-25 16:05:23,452 INFO ]: Without dead ends: 9 [2018-06-25 16:05:23,454 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 16:05:23,473 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 16:05:23,503 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 16:05:23,505 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 16:05:23,505 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 16:05:23,507 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 16:05:23,508 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:05:23,508 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 16:05:23,508 INFO ]: Interpolant automaton has 3 states. [2018-06-25 16:05:23,508 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 16:05:23,508 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 16:05:23,508 INFO ]: Found error trace [2018-06-25 16:05:23,508 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:05:23,508 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:05:23,509 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-25 16:05:23,509 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:05:23,509 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:05:23,509 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:23,509 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:05:23,510 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:23,581 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:23,675 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:05:23,676 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:05:23,676 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 [2018-06-25 16:05:23,694 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:05:23,789 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:23,801 INFO ]: Computing forward predicates... [2018-06-25 16:05:23,959 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:05:23,981 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:05:23,981 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 16:05:23,981 INFO ]: Interpolant automaton has 5 states [2018-06-25 16:05:23,981 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 16:05:23,981 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 16:05:23,982 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 16:05:24,007 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:05:24,007 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 16:05:24,007 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 16:05:24,007 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 16:05:24,007 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:05:24,008 INFO ]: With dead ends: 10 [2018-06-25 16:05:24,008 INFO ]: Without dead ends: 10 [2018-06-25 16:05:24,008 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-25 16:05:24,008 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 16:05:24,009 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 16:05:24,009 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 16:05:24,010 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 16:05:24,010 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 16:05:24,010 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:05:24,010 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 16:05:24,010 INFO ]: Interpolant automaton has 5 states. [2018-06-25 16:05:24,010 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 16:05:24,010 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 16:05:24,010 INFO ]: Found error trace [2018-06-25 16:05:24,010 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:05:24,010 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:05:24,010 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-25 16:05:24,010 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:05:24,010 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:05:24,011 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:24,011 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 16:05:24,011 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:24,120 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:25,156 WARN ]: Spent 782.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2018-06-25 16:05:25,772 WARN ]: Spent 531.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2018-06-25 16:05:25,774 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:05:25,774 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:05:25,774 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 [2018-06-25 16:05:25,783 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 16:05:25,858 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 16:05:25,858 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:25,862 INFO ]: Computing forward predicates... [2018-06-25 16:05:25,963 WARN ]: expecting exponential blowup for input size 9 [2018-06-25 16:05:26,365 WARN ]: expecting exponential blowup for input size 9 [2018-06-25 16:05:30,081 WARN ]: Spent 995.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 41 [2018-06-25 16:05:30,512 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 16:05:30,581 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 16:05:30,715 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 16:05:30,771 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 16:05:39,282 WARN ]: Spent 722.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 24 [2018-06-25 16:05:39,287 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 16:05:39,321 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:05:39,321 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-25 16:05:39,321 INFO ]: Interpolant automaton has 8 states [2018-06-25 16:05:39,321 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-25 16:05:39,322 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-25 16:05:39,322 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-25 16:05:39,740 WARN ]: Spent 399.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2018-06-25 16:05:39,842 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:05:39,842 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-25 16:05:39,845 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-25 16:05:39,845 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-25 16:05:39,846 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:05:39,846 INFO ]: With dead ends: 12 [2018-06-25 16:05:39,846 INFO ]: Without dead ends: 12 [2018-06-25 16:05:39,846 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-25 16:05:39,846 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-25 16:05:39,847 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-25 16:05:39,848 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-25 16:05:39,848 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-25 16:05:39,848 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-25 16:05:39,848 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:05:39,848 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-25 16:05:39,848 INFO ]: Interpolant automaton has 8 states. [2018-06-25 16:05:39,848 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-25 16:05:39,848 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-25 16:05:39,848 INFO ]: Found error trace [2018-06-25 16:05:39,848 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 16:05:39,849 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 16:05:39,849 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-25 16:05:39,849 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 16:05:39,849 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 16:05:39,850 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:39,850 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-25 16:05:39,850 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 16:05:39,921 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:40,036 INFO ]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-25 16:05:40,036 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 16:05:40,036 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 [2018-06-25 16:05:40,044 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-25 16:05:40,143 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-25 16:05:40,143 INFO ]: Conjunction of SSA is unsat [2018-06-25 16:05:40,147 INFO ]: Computing forward predicates... [2018-06-25 16:05:40,452 WARN ]: expecting exponential blowup for input size 10 [2018-06-25 16:05:40,602 WARN ]: Simplifying disjunction of 10752 conjuctions. This might take some time... [2018-06-25 16:05:52,936 INFO ]: Simplified to disjunction of 10752 conjuctions. [2018-06-25 16:05:53,161 INFO ]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-25 16:05:53,182 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 16:05:53,182 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-06-25 16:05:53,182 INFO ]: Interpolant automaton has 7 states [2018-06-25 16:05:53,182 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-25 16:05:53,183 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-25 16:05:53,183 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-06-25 16:05:53,194 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 16:05:53,194 INFO ]: Finished difference Result 5 states and 4 transitions. [2018-06-25 16:05:53,195 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 16:05:53,195 INFO ]: Start accepts. Automaton has 7 states. Word has length 11 [2018-06-25 16:05:53,195 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 16:05:53,195 INFO ]: With dead ends: 5 [2018-06-25 16:05:53,195 INFO ]: Without dead ends: 0 [2018-06-25 16:05:53,195 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-25 16:05:53,195 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-25 16:05:53,195 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-25 16:05:53,195 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-25 16:05:53,195 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-25 16:05:53,195 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2018-06-25 16:05:53,196 INFO ]: Finished accepts. word is rejected. [2018-06-25 16:05:53,196 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-25 16:05:53,196 INFO ]: Interpolant automaton has 7 states. [2018-06-25 16:05:53,196 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-25 16:05:53,196 INFO ]: Finished isEmpty. No accepting run. [2018-06-25 16:05:53,201 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 04:05:53 BoogieIcfgContainer [2018-06-25 16:05:53,201 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 16:05:53,202 INFO ]: Toolchain (without parser) took 30658.14 ms. Allocated memory was 304.1 MB in the beginning and 1.2 GB in the end (delta: 933.8 MB). Free memory was 256.5 MB in the beginning and 809.3 MB in the end (delta: -552.8 MB). Peak memory consumption was 381.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:05:53,202 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:05:53,203 INFO ]: ChcToBoogie took 73.55 ms. Allocated memory is still 304.1 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:05:53,203 INFO ]: Boogie Preprocessor took 46.83 ms. Allocated memory is still 304.1 MB. Free memory is still 252.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 16:05:53,204 INFO ]: RCFGBuilder took 332.03 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 238.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:05:53,204 INFO ]: TraceAbstraction took 30195.81 ms. Allocated memory was 304.1 MB in the beginning and 1.2 GB in the end (delta: 933.8 MB). Free memory was 238.5 MB in the beginning and 809.3 MB in the end (delta: -570.8 MB). Peak memory consumption was 363.0 MB. Max. memory is 3.6 GB. [2018-06-25 16:05:53,207 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 304.1 MB. Free memory is still 268.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 73.55 ms. Allocated memory is still 304.1 MB. Free memory was 254.5 MB in the beginning and 252.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 46.83 ms. Allocated memory is still 304.1 MB. Free memory is still 252.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 332.03 ms. Allocated memory is still 304.1 MB. Free memory was 252.5 MB in the beginning and 238.5 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 30195.81 ms. Allocated memory was 304.1 MB in the beginning and 1.2 GB in the end (delta: 933.8 MB). Free memory was 238.5 MB in the beginning and 809.3 MB in the end (delta: -570.8 MB). Peak memory consumption was 363.0 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 2 procedures, 10 locations, 1 error locations. SAFE Result, 30.1s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 50 SDs, 0 SdLazy, 35 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred 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, 0.4s SatisfiabilityAnalysisTime, 28.5s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 56 ConstructedInterpolants, 0 QuantifiedInterpolants, 4587 SizeOfPredicates, 14 NumberOfNonLiveVariables, 861 ConjunctsInSsa, 123 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 14/28 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/hysteresis_2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_16-05-53-217.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/hysteresis_2.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_16-05-53-217.csv Received shutdown request...