java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_2_e3_329_e4_1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 14:57:10,827 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 14:57:10,829 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 14:57:10,842 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 14:57:10,843 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 14:57:10,846 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 14:57:10,847 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 14:57:10,849 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 14:57:10,851 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 14:57:10,851 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 14:57:10,853 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 14:57:10,854 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 14:57:10,854 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 14:57:10,856 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 14:57:10,856 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 14:57:10,857 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 14:57:10,860 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 14:57:10,870 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 14:57:10,871 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 14:57:10,872 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 14:57:10,873 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 14:57:10,880 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 14:57:10,880 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 14:57:10,880 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 14:57:10,881 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 14:57:10,882 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 14:57:10,882 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 14:57:10,885 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 14:57:10,886 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 14:57:10,886 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 14:57:10,887 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 14:57:10,888 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 14:57:10,888 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 14:57:10,888 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 14:57:10,892 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 14:57:10,892 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 14:57:10,916 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 14:57:10,918 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 14:57:10,918 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 14:57:10,919 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 14:57:10,920 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 14:57:10,920 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 14:57:10,920 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 14:57:10,920 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 14:57:10,921 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:57:10,921 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 14:57:10,921 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 14:57:10,921 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 14:57:10,921 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 14:57:10,922 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 14:57:10,924 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 14:57:10,925 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 14:57:10,925 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 14:57:10,926 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 14:57:10,927 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 14:57:10,980 INFO ]: Repository-Root is: /tmp [2018-06-18 14:57:10,997 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 14:57:11,002 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 14:57:11,004 INFO ]: Initializing SmtParser... [2018-06-18 14:57:11,004 INFO ]: SmtParser initialized [2018-06-18 14:57:11,005 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_2_e3_329_e4_1.smt2 [2018-06-18 14:57:11,007 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 14:57:11,110 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_2_e3_329_e4_1.smt2 unknown [2018-06-18 14:57:11,302 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/durationThm_2_e3_329_e4_1.smt2 [2018-06-18 14:57:11,307 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 14:57:11,312 INFO ]: Walking toolchain with 4 elements. [2018-06-18 14:57:11,313 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 14:57:11,313 INFO ]: Initializing ChcToBoogie... [2018-06-18 14:57:11,313 INFO ]: ChcToBoogie initialized [2018-06-18 14:57:11,321 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,385 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11 Unit [2018-06-18 14:57:11,385 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 14:57:11,385 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 14:57:11,386 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 14:57:11,386 INFO ]: Boogie Preprocessor initialized [2018-06-18 14:57:11,412 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,413 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,422 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,422 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,426 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,427 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,428 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (1/1) ... [2018-06-18 14:57:11,440 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 14:57:11,441 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 14:57:11,441 INFO ]: Initializing RCFGBuilder... [2018-06-18 14:57:11,441 INFO ]: RCFGBuilder initialized [2018-06-18 14:57:11,442 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (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) [2018-06-18 14:57:11,459 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 14:57:11,459 INFO ]: Found specification of procedure False [2018-06-18 14:57:11,459 INFO ]: Found implementation of procedure False [2018-06-18 14:57:11,459 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 14:57:11,459 INFO ]: Found specification of procedure state [2018-06-18 14:57:11,460 INFO ]: Found implementation of procedure state [2018-06-18 14:57:11,460 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 14:57:11,460 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 14:57:11,460 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 14:57:11,805 INFO ]: Using library mode [2018-06-18 14:57:11,809 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:57:11 BoogieIcfgContainer [2018-06-18 14:57:11,809 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 14:57:11,810 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 14:57:11,810 INFO ]: Initializing TraceAbstraction... [2018-06-18 14:57:11,814 INFO ]: TraceAbstraction initialized [2018-06-18 14:57:11,815 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 02:57:11" (1/3) ... [2018-06-18 14:57:11,816 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209c7f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 02:57:11, skipping insertion in model container [2018-06-18 14:57:11,816 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 02:57:11" (2/3) ... [2018-06-18 14:57:11,816 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@209c7f0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 02:57:11, skipping insertion in model container [2018-06-18 14:57:11,816 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 02:57:11" (3/3) ... [2018-06-18 14:57:11,818 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 14:57:11,828 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 14:57:11,839 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 14:57:11,891 INFO ]: Using default assertion order modulation [2018-06-18 14:57:11,892 INFO ]: Interprodecural is true [2018-06-18 14:57:11,892 INFO ]: Hoare is false [2018-06-18 14:57:11,892 INFO ]: Compute interpolants for FPandBP [2018-06-18 14:57:11,892 INFO ]: Backedges is TWOTRACK [2018-06-18 14:57:11,892 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 14:57:11,892 INFO ]: Difference is false [2018-06-18 14:57:11,892 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 14:57:11,892 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 14:57:11,906 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 14:57:11,918 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 14:57:11,918 INFO ]: Found error trace [2018-06-18 14:57:11,919 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:57:11,919 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:57:11,923 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 14:57:11,925 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:57:11,926 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:57:11,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:11,967 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:57:11,967 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:12,037 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:57:12,046 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:57:12,212 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 14:57:12,214 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 14:57:12,214 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 14:57:12,215 INFO ]: Interpolant automaton has 4 states [2018-06-18 14:57:12,226 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 14:57:12,227 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:57:12,229 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 14:57:12,327 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:57:12,328 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 14:57:12,328 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 14:57:12,329 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 14:57:12,330 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:57:12,342 INFO ]: With dead ends: 13 [2018-06-18 14:57:12,342 INFO ]: Without dead ends: 13 [2018-06-18 14:57:12,344 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 14:57:12,358 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 14:57:12,397 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 14:57:12,398 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 14:57:12,399 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 14:57:12,400 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 14:57:12,401 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:57:12,401 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 14:57:12,401 INFO ]: Interpolant automaton has 4 states. [2018-06-18 14:57:12,401 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 14:57:12,402 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 14:57:12,402 INFO ]: Found error trace [2018-06-18 14:57:12,402 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:57:12,403 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:57:12,403 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 14:57:12,403 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:57:12,403 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:57:12,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:12,404 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:57:12,404 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:12,470 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:57:12,471 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:57:12,823 WARN ]: Spent 148.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 8 [2018-06-18 14:57:13,005 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:57:13,006 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:57:13,006 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 14:57:13,015 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:57:13,068 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:57:13,087 INFO ]: Computing forward predicates... [2018-06-18 14:57:13,662 WARN ]: Spent 147.00 ms on a formula simplification. DAG size of input: 7 DAG size of output: 5 [2018-06-18 14:57:13,729 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 14:57:13,765 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:57:13,765 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 14:57:13,766 INFO ]: Interpolant automaton has 8 states [2018-06-18 14:57:13,766 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 14:57:13,766 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-18 14:57:13,766 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 14:57:13,903 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 9 [2018-06-18 14:57:14,098 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:57:14,098 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 14:57:14,101 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:57:14,101 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 14:57:14,101 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:57:14,102 INFO ]: With dead ends: 15 [2018-06-18 14:57:14,102 INFO ]: Without dead ends: 15 [2018-06-18 14:57:14,103 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2018-06-18 14:57:14,103 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 14:57:14,109 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 14:57:14,109 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 14:57:14,110 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 14:57:14,110 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 14:57:14,110 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:57:14,110 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 14:57:14,110 INFO ]: Interpolant automaton has 8 states. [2018-06-18 14:57:14,110 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 14:57:14,111 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 14:57:14,111 INFO ]: Found error trace [2018-06-18 14:57:14,111 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 14:57:14,111 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 14:57:14,111 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 14:57:14,111 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 14:57:14,111 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 14:57:14,112 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:14,112 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 14:57:14,112 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 14:57:14,150 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:57:14,151 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 14:57:14,459 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-18 14:57:14,641 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:57:14,642 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 14:57:14,642 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 14:57:14,649 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 14:57:14,717 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 14:57:14,717 INFO ]: Conjunction of SSA is unsat [2018-06-18 14:57:14,721 INFO ]: Computing forward predicates... [2018-06-18 14:57:15,311 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 14:57:15,337 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 14:57:15,338 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-18 14:57:15,338 INFO ]: Interpolant automaton has 12 states [2018-06-18 14:57:15,339 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-18 14:57:15,339 INFO ]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2018-06-18 14:57:15,339 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-18 14:57:15,537 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 14:57:15,537 INFO ]: Finished difference Result 11 states and 12 transitions. [2018-06-18 14:57:15,537 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 14:57:15,537 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-18 14:57:15,537 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 14:57:15,537 INFO ]: With dead ends: 11 [2018-06-18 14:57:15,538 INFO ]: Without dead ends: 0 [2018-06-18 14:57:15,538 INFO ]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-18 14:57:15,538 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 14:57:15,538 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 14:57:15,538 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 14:57:15,538 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 14:57:15,538 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2018-06-18 14:57:15,538 INFO ]: Finished accepts. word is rejected. [2018-06-18 14:57:15,538 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 14:57:15,538 INFO ]: Interpolant automaton has 12 states. [2018-06-18 14:57:15,538 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 14:57:15,539 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 14:57:15,543 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 02:57:15 BoogieIcfgContainer [2018-06-18 14:57:15,543 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 14:57:15,544 INFO ]: Toolchain (without parser) took 4235.96 ms. Allocated memory was 300.4 MB in the beginning and 324.0 MB in the end (delta: 23.6 MB). Free memory was 253.8 MB in the beginning and 201.1 MB in the end (delta: 52.7 MB). Peak memory consumption was 76.3 MB. Max. memory is 3.6 GB. [2018-06-18 14:57:15,545 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 300.4 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 14:57:15,545 INFO ]: ChcToBoogie took 72.51 ms. Allocated memory is still 300.4 MB. Free memory was 253.8 MB in the beginning and 251.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:57:15,546 INFO ]: Boogie Preprocessor took 54.65 ms. Allocated memory is still 300.4 MB. Free memory was 251.8 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:57:15,546 INFO ]: RCFGBuilder took 368.64 ms. Allocated memory is still 300.4 MB. Free memory was 249.8 MB in the beginning and 239.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-18 14:57:15,547 INFO ]: TraceAbstraction took 3732.67 ms. Allocated memory was 300.4 MB in the beginning and 324.0 MB in the end (delta: 23.6 MB). Free memory was 239.8 MB in the beginning and 201.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 62.2 MB. Max. memory is 3.6 GB. [2018-06-18 14:57:15,551 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 300.4 MB. Free memory is still 265.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 72.51 ms. Allocated memory is still 300.4 MB. Free memory was 253.8 MB in the beginning and 251.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 54.65 ms. Allocated memory is still 300.4 MB. Free memory was 251.8 MB in the beginning and 249.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 368.64 ms. Allocated memory is still 300.4 MB. Free memory was 249.8 MB in the beginning and 239.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 3732.67 ms. Allocated memory was 300.4 MB in the beginning and 324.0 MB in the end (delta: 23.6 MB). Free memory was 239.8 MB in the beginning and 201.1 MB in the end (delta: 38.6 MB). Peak memory consumption was 62.2 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 3 procedures, 13 locations, 1 error locations. SAFE Result, 3.6s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 29 SDtfs, 15 SDslu, 67 SDs, 0 SdLazy, 54 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 2264 SizeOfPredicates, 39 NumberOfNonLiveVariables, 349 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/durationThm_2_e3_329_e4_1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_14-57-15-562.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/durationThm_2_e3_329_e4_1.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_14-57-15-562.csv Received shutdown request...