java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 08:35:11,023 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 08:35:11,025 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 08:35:11,036 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 08:35:11,037 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 08:35:11,037 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 08:35:11,039 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 08:35:11,040 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 08:35:11,042 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 08:35:11,043 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 08:35:11,044 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 08:35:11,044 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 08:35:11,045 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 08:35:11,046 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 08:35:11,046 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 08:35:11,047 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 08:35:11,049 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 08:35:11,051 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 08:35:11,052 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 08:35:11,053 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 08:35:11,064 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 08:35:11,067 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 08:35:11,067 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 08:35:11,067 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 08:35:11,073 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 08:35:11,074 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 08:35:11,075 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 08:35:11,076 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 08:35:11,077 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 08:35:11,077 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 08:35:11,077 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 08:35:11,078 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 08:35:11,078 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 08:35:11,079 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 08:35:11,080 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 08:35:11,080 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 08:35:11,107 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 08:35:11,107 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 08:35:11,107 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 08:35:11,107 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 08:35:11,114 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 08:35:11,115 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 08:35:11,115 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 08:35:11,115 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 08:35:11,115 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 08:35:11,115 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 08:35:11,116 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 08:35:11,117 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 08:35:11,121 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 08:35:11,121 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 08:35:11,172 INFO ]: Repository-Root is: /tmp [2018-06-22 08:35:11,186 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 08:35:11,191 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 08:35:11,192 INFO ]: Initializing SmtParser... [2018-06-22 08:35:11,193 INFO ]: SmtParser initialized [2018-06-22 08:35:11,193 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 [2018-06-22 08:35:11,194 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 08:35:11,282 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 unknown [2018-06-22 08:35:11,535 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/hysteresis_2.smt2 [2018-06-22 08:35:11,540 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 08:35:11,546 INFO ]: Walking toolchain with 4 elements. [2018-06-22 08:35:11,546 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 08:35:11,546 INFO ]: Initializing ChcToBoogie... [2018-06-22 08:35:11,547 INFO ]: ChcToBoogie initialized [2018-06-22 08:35:11,550 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,613 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11 Unit [2018-06-22 08:35:11,613 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 08:35:11,614 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 08:35:11,614 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 08:35:11,614 INFO ]: Boogie Preprocessor initialized [2018-06-22 08:35:11,634 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,635 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,641 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,642 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,645 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,647 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,648 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... [2018-06-22 08:35:11,650 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 08:35:11,650 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 08:35:11,650 INFO ]: Initializing RCFGBuilder... [2018-06-22 08:35:11,650 INFO ]: RCFGBuilder initialized [2018-06-22 08:35:11,651 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 08:35:11,665 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 08:35:11,665 INFO ]: Found specification of procedure gotoProc [2018-06-22 08:35:11,665 INFO ]: Found implementation of procedure gotoProc [2018-06-22 08:35:11,665 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 08:35:11,665 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 08:35:11,665 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 08:35:11,960 INFO ]: Using library mode [2018-06-22 08:35:11,961 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:35:11 BoogieIcfgContainer [2018-06-22 08:35:11,961 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 08:35:11,963 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 08:35:11,963 INFO ]: Initializing TraceAbstraction... [2018-06-22 08:35:11,966 INFO ]: TraceAbstraction initialized [2018-06-22 08:35:11,966 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:35:11" (1/3) ... [2018-06-22 08:35:11,967 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 22.06 08:35:11, skipping insertion in model container [2018-06-22 08:35:11,967 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:35:11" (2/3) ... [2018-06-22 08:35:11,967 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 22.06 08:35:11, skipping insertion in model container [2018-06-22 08:35:11,967 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:35:11" (3/3) ... [2018-06-22 08:35:11,969 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 08:35:11,978 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 08:35:11,985 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 08:35:12,029 INFO ]: Using default assertion order modulation [2018-06-22 08:35:12,030 INFO ]: Interprodecural is true [2018-06-22 08:35:12,030 INFO ]: Hoare is false [2018-06-22 08:35:12,030 INFO ]: Compute interpolants for FPandBP [2018-06-22 08:35:12,030 INFO ]: Backedges is TWOTRACK [2018-06-22 08:35:12,030 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 08:35:12,030 INFO ]: Difference is false [2018-06-22 08:35:12,030 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 08:35:12,030 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 08:35:12,043 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 08:35:12,053 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 08:35:12,053 INFO ]: Found error trace [2018-06-22 08:35:12,054 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 08:35:12,054 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 08:35:12,062 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 08:35:12,064 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 08:35:12,064 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 08:35:12,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:12,097 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 08:35:12,097 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:12,163 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:12,256 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 08:35:12,259 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 08:35:12,259 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 08:35:12,261 INFO ]: Interpolant automaton has 3 states [2018-06-22 08:35:12,278 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 08:35:12,279 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 08:35:12,282 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 08:35:12,360 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 08:35:12,360 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 08:35:12,361 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 08:35:12,362 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 08:35:12,362 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 08:35:12,370 INFO ]: With dead ends: 9 [2018-06-22 08:35:12,370 INFO ]: Without dead ends: 9 [2018-06-22 08:35:12,372 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 [2018-06-22 08:35:12,389 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 08:35:12,404 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 08:35:12,406 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 08:35:12,406 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 08:35:12,407 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 08:35:12,407 INFO ]: Finished accepts. word is rejected. [2018-06-22 08:35:12,407 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 08:35:12,407 INFO ]: Interpolant automaton has 3 states. [2018-06-22 08:35:12,408 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 08:35:12,408 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 08:35:12,408 INFO ]: Found error trace [2018-06-22 08:35:12,408 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 08:35:12,408 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 08:35:12,408 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 08:35:12,408 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 08:35:12,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 08:35:12,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:12,409 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 08:35:12,409 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:12,448 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:12,540 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 08:35:12,540 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 08:35:12,540 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 08:35:12,548 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 08:35:12,633 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:12,644 INFO ]: Computing forward predicates... [2018-06-22 08:35:12,819 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 08:35:12,851 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 08:35:12,851 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 08:35:12,851 INFO ]: Interpolant automaton has 5 states [2018-06-22 08:35:12,852 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 08:35:12,852 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 08:35:12,852 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 08:35:12,938 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 08:35:12,938 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 08:35:12,939 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 08:35:12,939 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 08:35:12,939 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 08:35:12,939 INFO ]: With dead ends: 10 [2018-06-22 08:35:12,939 INFO ]: Without dead ends: 10 [2018-06-22 08:35:12,940 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 [2018-06-22 08:35:12,940 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 08:35:12,941 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 08:35:12,941 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 08:35:12,942 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 08:35:12,942 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 08:35:12,942 INFO ]: Finished accepts. word is rejected. [2018-06-22 08:35:12,942 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 08:35:12,942 INFO ]: Interpolant automaton has 5 states. [2018-06-22 08:35:12,942 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 08:35:12,942 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 08:35:12,942 INFO ]: Found error trace [2018-06-22 08:35:12,942 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 08:35:12,942 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 08:35:12,943 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 08:35:12,943 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 08:35:12,943 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 08:35:12,944 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:12,944 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 08:35:12,944 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:13,085 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:14,223 WARN ]: Spent 898.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 47 [2018-06-22 08:35:14,842 WARN ]: Spent 562.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 47 [2018-06-22 08:35:14,844 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 08:35:14,844 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 08:35:14,844 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 08:35:14,850 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 08:35:14,922 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 08:35:14,922 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:14,927 INFO ]: Computing forward predicates... [2018-06-22 08:35:15,011 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 08:35:15,398 WARN ]: expecting exponential blowup for input size 9 [2018-06-22 08:35:19,827 WARN ]: Spent 990.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 41 [2018-06-22 08:35:20,260 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 08:35:20,328 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 08:35:20,439 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 08:35:20,481 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 08:35:29,397 WARN ]: Spent 709.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 24 [2018-06-22 08:35:29,402 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 08:35:29,438 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 08:35:29,438 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2018-06-22 08:35:29,438 INFO ]: Interpolant automaton has 8 states [2018-06-22 08:35:29,438 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 08:35:29,438 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 08:35:29,439 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 8 states. [2018-06-22 08:35:29,837 WARN ]: Spent 367.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 74 [2018-06-22 08:35:29,960 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 08:35:29,960 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 08:35:29,960 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 08:35:29,960 INFO ]: Start accepts. Automaton has 8 states. Word has length 9 [2018-06-22 08:35:29,960 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 08:35:29,960 INFO ]: With dead ends: 12 [2018-06-22 08:35:29,960 INFO ]: Without dead ends: 12 [2018-06-22 08:35:29,961 INFO ]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 08:35:29,961 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 08:35:29,962 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 08:35:29,962 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 08:35:29,963 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 08:35:29,963 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 08:35:29,963 INFO ]: Finished accepts. word is rejected. [2018-06-22 08:35:29,963 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 08:35:29,963 INFO ]: Interpolant automaton has 8 states. [2018-06-22 08:35:29,963 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 08:35:29,963 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 08:35:29,963 INFO ]: Found error trace [2018-06-22 08:35:29,963 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 08:35:29,963 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 08:35:29,963 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 08:35:29,963 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 08:35:29,964 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 08:35:29,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:29,964 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 08:35:29,964 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 08:35:30,022 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:30,148 INFO ]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 08:35:30,148 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 08:35:30,148 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 08:35:30,154 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 08:35:30,252 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 08:35:30,252 INFO ]: Conjunction of SSA is unsat [2018-06-22 08:35:30,257 INFO ]: Computing forward predicates... [2018-06-22 08:35:30,544 WARN ]: expecting exponential blowup for input size 10 [2018-06-22 08:35:30,627 WARN ]: Simplifying disjunction of 10752 conjuctions. This might take some time... [2018-06-22 08:35:41,023 INFO ]: Simplified to disjunction of 10752 conjuctions. [2018-06-22 08:35:41,354 INFO ]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 08:35:41,374 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 08:35:41,374 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2018-06-22 08:35:41,374 INFO ]: Interpolant automaton has 7 states [2018-06-22 08:35:41,374 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 08:35:41,374 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 08:35:41,375 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 7 states. [2018-06-22 08:35:41,397 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 08:35:41,397 INFO ]: Finished difference Result 5 states and 4 transitions. [2018-06-22 08:35:41,398 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 08:35:41,398 INFO ]: Start accepts. Automaton has 7 states. Word has length 11 [2018-06-22 08:35:41,398 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 08:35:41,398 INFO ]: With dead ends: 5 [2018-06-22 08:35:41,398 INFO ]: Without dead ends: 0 [2018-06-22 08:35:41,398 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 08:35:41,398 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 08:35:41,398 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 08:35:41,398 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 08:35:41,398 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 08:35:41,398 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2018-06-22 08:35:41,398 INFO ]: Finished accepts. word is rejected. [2018-06-22 08:35:41,398 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 08:35:41,398 INFO ]: Interpolant automaton has 7 states. [2018-06-22 08:35:41,398 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 08:35:41,399 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 08:35:41,404 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:35:41 BoogieIcfgContainer [2018-06-22 08:35:41,404 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 08:35:41,404 INFO ]: Toolchain (without parser) took 29864.13 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 921.2 MB). Free memory was 260.7 MB in the beginning and 896.5 MB in the end (delta: -635.8 MB). Peak memory consumption was 285.4 MB. Max. memory is 3.6 GB. [2018-06-22 08:35:41,405 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 08:35:41,406 INFO ]: ChcToBoogie took 67.06 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 08:35:41,406 INFO ]: Boogie Preprocessor took 35.88 ms. Allocated memory is still 308.3 MB. Free memory is still 256.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 08:35:41,406 INFO ]: RCFGBuilder took 310.71 ms. Allocated memory is still 308.3 MB. Free memory was 256.7 MB in the beginning and 242.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. [2018-06-22 08:35:41,415 INFO ]: TraceAbstraction took 29441.11 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 921.2 MB). Free memory was 242.7 MB in the beginning and 896.5 MB in the end (delta: -653.8 MB). Peak memory consumption was 267.4 MB. Max. memory is 3.6 GB. [2018-06-22 08:35:41,417 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 272.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 67.06 ms. Allocated memory is still 308.3 MB. Free memory was 258.7 MB in the beginning and 256.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 35.88 ms. Allocated memory is still 308.3 MB. Free memory is still 256.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 310.71 ms. Allocated memory is still 308.3 MB. Free memory was 256.7 MB in the beginning and 242.7 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 29441.11 ms. Allocated memory was 308.3 MB in the beginning and 1.2 GB in the end (delta: 921.2 MB). Free memory was 242.7 MB in the beginning and 896.5 MB in the end (delta: -653.8 MB). Peak memory consumption was 267.4 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, 29.3s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.7s 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, 27.8s 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-0-2018-06-22_08-35-41-428.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-0-2018-06-22_08-35-41-428.csv Received shutdown request...