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/peterson_1_e7_4234.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:33:00,808 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:33:00,810 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:33:00,828 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:33:00,828 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:33:00,829 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:33:00,830 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:33:00,833 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:33:00,834 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:33:00,836 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:33:00,837 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:33:00,837 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:33:00,838 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:33:00,839 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:33:00,840 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:33:00,844 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:33:00,845 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:33:00,848 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:33:00,849 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:33:00,850 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:33:00,851 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:33:00,853 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:33:00,854 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:33:00,854 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:33:00,855 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:33:00,855 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:33:00,856 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:33:00,857 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:33:00,858 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:33:00,858 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:33:00,859 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:33:00,859 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:33:00,859 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:33:00,860 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:33:00,861 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:33:00,861 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:33:00,874 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:33:00,874 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:33:00,874 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:33:00,875 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:33:00,876 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:33:00,876 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:33:00,876 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:33:00,876 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:33:00,876 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:33:00,876 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:33:00,877 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:33:00,878 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:33:00,879 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:33:00,879 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:33:00,924 INFO ]: Repository-Root is: /tmp [2018-06-22 09:33:00,936 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:33:00,942 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:33:00,944 INFO ]: Initializing SmtParser... [2018-06-22 09:33:00,944 INFO ]: SmtParser initialized [2018-06-22 09:33:00,945 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 [2018-06-22 09:33:00,946 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 09:33:01,036 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 unknown [2018-06-22 09:33:01,771 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/peterson_1_e7_4234.smt2 [2018-06-22 09:33:01,775 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:33:01,781 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:33:01,782 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:33:01,782 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:33:01,782 INFO ]: ChcToBoogie initialized [2018-06-22 09:33:01,785 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:01,928 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01 Unit [2018-06-22 09:33:01,929 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:33:01,929 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:33:01,929 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:33:01,929 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:33:01,949 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:01,949 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:01,979 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:01,980 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:02,001 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:02,005 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:02,010 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (1/1) ... [2018-06-22 09:33:02,022 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:33:02,027 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:33:02,027 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:33:02,027 INFO ]: RCFGBuilder initialized [2018-06-22 09:33:02,028 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (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 09:33:02,048 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:33:02,048 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:33:02,048 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:33:02,049 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:33:02,049 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:33:02,049 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 09:33:02,654 INFO ]: Using library mode [2018-06-22 09:33:02,655 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:33:02 BoogieIcfgContainer [2018-06-22 09:33:02,656 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:33:02,657 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:33:02,657 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:33:02,664 INFO ]: TraceAbstraction initialized [2018-06-22 09:33:02,664 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:33:01" (1/3) ... [2018-06-22 09:33:02,665 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b865adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:33:02, skipping insertion in model container [2018-06-22 09:33:02,665 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:33:01" (2/3) ... [2018-06-22 09:33:02,665 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b865adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:33:02, skipping insertion in model container [2018-06-22 09:33:02,665 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:33:02" (3/3) ... [2018-06-22 09:33:02,667 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:33:02,676 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:33:02,686 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:33:02,739 INFO ]: Using default assertion order modulation [2018-06-22 09:33:02,740 INFO ]: Interprodecural is true [2018-06-22 09:33:02,740 INFO ]: Hoare is false [2018-06-22 09:33:02,740 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:33:02,740 INFO ]: Backedges is TWOTRACK [2018-06-22 09:33:02,740 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:33:02,740 INFO ]: Difference is false [2018-06-22 09:33:02,740 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:33:02,740 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:33:02,761 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:33:02,775 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:33:02,775 INFO ]: Found error trace [2018-06-22 09:33:02,776 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:02,776 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:02,782 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 09:33:02,784 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:02,785 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:02,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:02,825 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:02,825 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:02,992 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:03,186 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:03,189 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:33:03,189 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:33:03,191 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:33:03,205 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:33:03,205 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:33:03,208 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:33:03,307 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:03,307 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:33:03,308 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:33:03,309 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:33:03,309 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:03,319 INFO ]: With dead ends: 9 [2018-06-22 09:33:03,319 INFO ]: Without dead ends: 9 [2018-06-22 09:33:03,321 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 09:33:03,337 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:33:03,362 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:33:03,363 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:33:03,364 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:33:03,365 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:33:03,365 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:03,365 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:33:03,365 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:33:03,365 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:33:03,366 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:33:03,366 INFO ]: Found error trace [2018-06-22 09:33:03,366 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:03,366 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:03,366 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 09:33:03,366 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:03,366 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:03,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:03,367 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:03,367 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:03,546 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:03,780 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:03,780 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:33:03,780 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 09:33:03,787 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:04,119 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:04,137 INFO ]: Computing forward predicates... [2018-06-22 09:33:04,194 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 09:33:05,011 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:05,033 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:33:05,033 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 09:33:05,034 INFO ]: Interpolant automaton has 5 states [2018-06-22 09:33:05,034 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 09:33:05,034 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 09:33:05,034 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 09:33:05,152 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:05,152 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 09:33:05,152 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 09:33:05,152 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 09:33:05,152 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:05,153 INFO ]: With dead ends: 10 [2018-06-22 09:33:05,153 INFO ]: Without dead ends: 10 [2018-06-22 09:33:05,153 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 09:33:05,153 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 09:33:05,154 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 09:33:05,154 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 09:33:05,154 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 09:33:05,154 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 09:33:05,154 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:05,155 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 09:33:05,155 INFO ]: Interpolant automaton has 5 states. [2018-06-22 09:33:05,155 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 09:33:05,155 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 09:33:05,155 INFO ]: Found error trace [2018-06-22 09:33:05,155 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:33:05,155 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:33:05,155 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 09:33:05,155 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:33:05,155 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:33:05,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:05,156 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:33:05,156 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:33:05,291 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:05,731 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:05,731 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:33:05,731 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 09:33:05,737 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:33:06,136 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:33:06,136 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:33:06,151 INFO ]: Computing forward predicates... [2018-06-22 09:33:06,211 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 09:33:07,089 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 09:33:08,261 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:33:08,285 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:33:08,286 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 09:33:08,286 INFO ]: Interpolant automaton has 7 states [2018-06-22 09:33:08,286 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 09:33:08,286 INFO ]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-06-22 09:33:08,286 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 09:33:08,427 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:33:08,427 INFO ]: Finished difference Result 6 states and 6 transitions. [2018-06-22 09:33:08,429 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 09:33:08,429 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 09:33:08,429 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:33:08,429 INFO ]: With dead ends: 6 [2018-06-22 09:33:08,429 INFO ]: Without dead ends: 0 [2018-06-22 09:33:08,429 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 09:33:08,429 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-22 09:33:08,429 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-22 09:33:08,430 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-22 09:33:08,430 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-22 09:33:08,430 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2018-06-22 09:33:08,430 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:33:08,430 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-22 09:33:08,430 INFO ]: Interpolant automaton has 7 states. [2018-06-22 09:33:08,430 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-22 09:33:08,430 INFO ]: Finished isEmpty. No accepting run. [2018-06-22 09:33:08,435 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 09:33:08 BoogieIcfgContainer [2018-06-22 09:33:08,435 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 09:33:08,436 INFO ]: Toolchain (without parser) took 6659.93 ms. Allocated memory was 304.1 MB in the beginning and 465.0 MB in the end (delta: 161.0 MB). Free memory was 218.5 MB in the beginning and 201.5 MB in the end (delta: 17.0 MB). Peak memory consumption was 178.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:08,438 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 304.1 MB. Free memory is still 267.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 09:33:08,438 INFO ]: ChcToBoogie took 147.14 ms. Allocated memory is still 304.1 MB. Free memory was 218.5 MB in the beginning and 214.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:08,438 INFO ]: Boogie Preprocessor took 93.12 ms. Allocated memory is still 304.1 MB. Free memory was 214.5 MB in the beginning and 212.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:08,439 INFO ]: RCFGBuilder took 628.66 ms. Allocated memory was 304.1 MB in the beginning and 323.0 MB in the end (delta: 18.9 MB). Free memory was 211.5 MB in the beginning and 250.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:08,440 INFO ]: TraceAbstraction took 5778.01 ms. Allocated memory was 323.0 MB in the beginning and 465.0 MB in the end (delta: 142.1 MB). Free memory was 250.5 MB in the beginning and 201.5 MB in the end (delta: 49.1 MB). Peak memory consumption was 191.2 MB. Max. memory is 3.6 GB. [2018-06-22 09:33:08,443 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 267.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 147.14 ms. Allocated memory is still 304.1 MB. Free memory was 218.5 MB in the beginning and 214.5 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 93.12 ms. Allocated memory is still 304.1 MB. Free memory was 214.5 MB in the beginning and 212.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 628.66 ms. Allocated memory was 304.1 MB in the beginning and 323.0 MB in the end (delta: 18.9 MB). Free memory was 211.5 MB in the beginning and 250.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 34.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 5778.01 ms. Allocated memory was 323.0 MB in the beginning and 465.0 MB in the end (delta: 142.1 MB). Free memory was 250.5 MB in the beginning and 201.5 MB in the end (delta: 49.1 MB). Peak memory consumption was 191.2 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, 5.7s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 17 SDtfs, 0 SDslu, 30 SDs, 0 SdLazy, 22 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 908 SizeOfPredicates, 10 NumberOfNonLiveVariables, 3164 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 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/peterson_1_e7_4234.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_09-33-08-454.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/peterson_1_e7_4234.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_09-33-08-454.csv Received shutdown request...