java -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf -i /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e7_223_e7_213.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-55b8104 [2018-06-18 16:36:46,757 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-18 16:36:46,760 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-18 16:36:46,772 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-18 16:36:46,772 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-18 16:36:46,773 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-18 16:36:46,774 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-18 16:36:46,776 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-18 16:36:46,777 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-18 16:36:46,778 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-18 16:36:46,779 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-18 16:36:46,779 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-18 16:36:46,780 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-18 16:36:46,781 INFO L177 SettingsManager]: ChcToBoogie provides no preferences, ignoring... [2018-06-18 16:36:46,781 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-18 16:36:46,782 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-18 16:36:46,786 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-18 16:36:46,788 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-18 16:36:46,793 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-18 16:36:46,794 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-18 16:36:46,795 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-18 16:36:46,803 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-18 16:36:46,804 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-18 16:36:46,804 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-18 16:36:46,808 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-18 16:36:46,809 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-18 16:36:46,810 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-18 16:36:46,810 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-18 16:36:46,811 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-18 16:36:46,811 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-18 16:36:46,812 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-18 16:36:46,813 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-18 16:36:46,813 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-18 16:36:46,814 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-18 16:36:46,814 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-18 16:36:46,814 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chccomp2018/chcToBoogie_automizer.epf [2018-06-18 16:36:46,835 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-18 16:36:46,835 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-18 16:36:46,836 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-18 16:36:46,836 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-18 16:36:46,837 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-18 16:36:46,837 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-18 16:36:46,837 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-18 16:36:46,838 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-18 16:36:46,838 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:36:46,838 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-18 16:36:46,838 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-18 16:36:46,838 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-18 16:36:46,839 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-18 16:36:46,839 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-18 16:36:46,839 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-18 16:36:46,839 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-18 16:36:46,839 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-18 16:36:46,840 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-18 16:36:46,841 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-18 16:36:46,876 INFO ]: Repository-Root is: /tmp [2018-06-18 16:36:46,897 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-18 16:36:46,902 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-18 16:36:46,903 INFO ]: Initializing SmtParser... [2018-06-18 16:36:46,903 INFO ]: SmtParser initialized [2018-06-18 16:36:46,904 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e7_223_e7_213.smt2 [2018-06-18 16:36:46,905 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-18 16:36:46,994 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e7_223_e7_213.smt2 unknown [2018-06-18 16:36:47,308 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/speed2_e7_223_e7_213.smt2 [2018-06-18 16:36:47,313 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-18 16:36:47,319 INFO ]: Walking toolchain with 4 elements. [2018-06-18 16:36:47,319 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-18 16:36:47,319 INFO ]: Initializing ChcToBoogie... [2018-06-18 16:36:47,319 INFO ]: ChcToBoogie initialized [2018-06-18 16:36:47,326 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,422 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47 Unit [2018-06-18 16:36:47,422 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-18 16:36:47,422 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-18 16:36:47,422 INFO ]: Initializing Boogie Preprocessor... [2018-06-18 16:36:47,422 INFO ]: Boogie Preprocessor initialized [2018-06-18 16:36:47,471 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,472 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,479 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,479 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,482 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,483 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,485 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... [2018-06-18 16:36:47,487 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-18 16:36:47,487 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-18 16:36:47,487 INFO ]: Initializing RCFGBuilder... [2018-06-18 16:36:47,487 INFO ]: RCFGBuilder initialized [2018-06-18 16:36:47,488 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-18 16:36:47,503 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-18 16:36:47,503 INFO ]: Found specification of procedure False [2018-06-18 16:36:47,503 INFO ]: Found implementation of procedure False [2018-06-18 16:36:47,503 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-18 16:36:47,503 INFO ]: Found specification of procedure state [2018-06-18 16:36:47,503 INFO ]: Found implementation of procedure state [2018-06-18 16:36:47,503 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-18 16:36:47,503 INFO ]: Found specification of procedure Ultimate.START [2018-06-18 16:36:47,504 INFO ]: Found implementation of procedure Ultimate.START [2018-06-18 16:36:47,696 INFO ]: Using library mode [2018-06-18 16:36:47,697 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:36:47 BoogieIcfgContainer [2018-06-18 16:36:47,697 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-18 16:36:47,701 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-18 16:36:47,701 INFO ]: Initializing TraceAbstraction... [2018-06-18 16:36:47,704 INFO ]: TraceAbstraction initialized [2018-06-18 16:36:47,704 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 18.06 04:36:47" (1/3) ... [2018-06-18 16:36:47,705 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6634de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 18.06 04:36:47, skipping insertion in model container [2018-06-18 16:36:47,706 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 18.06 04:36:47" (2/3) ... [2018-06-18 16:36:47,706 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d6634de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.06 04:36:47, skipping insertion in model container [2018-06-18 16:36:47,706 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.06 04:36:47" (3/3) ... [2018-06-18 16:36:47,708 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-18 16:36:47,717 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-18 16:36:47,727 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-18 16:36:47,769 INFO ]: Using default assertion order modulation [2018-06-18 16:36:47,769 INFO ]: Interprodecural is true [2018-06-18 16:36:47,769 INFO ]: Hoare is false [2018-06-18 16:36:47,769 INFO ]: Compute interpolants for FPandBP [2018-06-18 16:36:47,769 INFO ]: Backedges is TWOTRACK [2018-06-18 16:36:47,769 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-18 16:36:47,769 INFO ]: Difference is false [2018-06-18 16:36:47,769 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-18 16:36:47,769 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-18 16:36:47,782 INFO ]: Start isEmpty. Operand 13 states. [2018-06-18 16:36:47,794 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-18 16:36:47,794 INFO ]: Found error trace [2018-06-18 16:36:47,795 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:36:47,795 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:36:47,798 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-18 16:36:47,800 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:36:47,800 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:36:47,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:47,840 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:36:47,840 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:47,915 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:47,924 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:36:48,070 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-18 16:36:48,073 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-18 16:36:48,073 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-18 16:36:48,075 INFO ]: Interpolant automaton has 4 states [2018-06-18 16:36:48,088 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-18 16:36:48,088 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:36:48,090 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-18 16:36:48,164 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:36:48,165 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:36:48,166 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-18 16:36:48,167 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-18 16:36:48,167 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:36:48,181 INFO ]: With dead ends: 13 [2018-06-18 16:36:48,181 INFO ]: Without dead ends: 13 [2018-06-18 16:36:48,185 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-18 16:36:48,202 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-18 16:36:48,226 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-18 16:36:48,227 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-18 16:36:48,228 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-18 16:36:48,229 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-18 16:36:48,229 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:36:48,229 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-18 16:36:48,229 INFO ]: Interpolant automaton has 4 states. [2018-06-18 16:36:48,229 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-18 16:36:48,230 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-18 16:36:48,230 INFO ]: Found error trace [2018-06-18 16:36:48,230 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:36:48,230 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:36:48,230 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-18 16:36:48,230 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:36:48,231 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:36:48,231 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:48,231 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:36:48,231 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:48,267 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:48,269 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:36:48,535 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:36:48,535 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:36:48,535 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 16:36:48,545 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:36:48,615 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:48,625 INFO ]: Computing forward predicates... [2018-06-18 16:36:49,138 WARN ]: Spent 202.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 3 [2018-06-18 16:36:49,215 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-18 16:36:49,250 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:36:49,250 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-18 16:36:49,250 INFO ]: Interpolant automaton has 8 states [2018-06-18 16:36:49,251 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-18 16:36:49,251 INFO ]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-06-18 16:36:49,251 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-18 16:36:49,529 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:36:49,529 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-18 16:36:49,530 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:36:49,530 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-18 16:36:49,530 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:36:49,530 INFO ]: With dead ends: 15 [2018-06-18 16:36:49,530 INFO ]: Without dead ends: 15 [2018-06-18 16:36:49,531 INFO ]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2018-06-18 16:36:49,532 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-18 16:36:49,534 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-18 16:36:49,534 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-18 16:36:49,535 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-18 16:36:49,535 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-18 16:36:49,535 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:36:49,535 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-18 16:36:49,535 INFO ]: Interpolant automaton has 8 states. [2018-06-18 16:36:49,535 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-18 16:36:49,536 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-18 16:36:49,536 INFO ]: Found error trace [2018-06-18 16:36:49,536 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:36:49,536 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:36:49,536 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-18 16:36:49,536 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:36:49,536 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:36:49,537 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:49,538 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-18 16:36:49,538 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:49,603 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:49,603 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:36:50,777 WARN ]: Spent 967.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2018-06-18 16:36:50,879 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:36:50,879 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:36:50,879 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:36:50,888 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-18 16:36:50,940 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-18 16:36:50,940 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:50,946 INFO ]: Computing forward predicates... [2018-06-18 16:36:51,773 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2018-06-18 16:36:52,298 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-18 16:36:52,333 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:36:52,333 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-18 16:36:52,333 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:36:52,333 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:36:52,333 INFO ]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:36:52,334 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-18 16:36:52,743 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2018-06-18 16:36:52,986 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 52 [2018-06-18 16:36:53,255 WARN ]: Spent 241.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2018-06-18 16:36:53,288 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:36:53,288 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-18 16:36:53,290 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-18 16:36:53,290 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-18 16:36:53,290 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:36:53,291 INFO ]: With dead ends: 17 [2018-06-18 16:36:53,291 INFO ]: Without dead ends: 17 [2018-06-18 16:36:53,291 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2018-06-18 16:36:53,291 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-18 16:36:53,294 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-18 16:36:53,294 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-18 16:36:53,294 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-18 16:36:53,295 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-18 16:36:53,295 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:36:53,295 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-18 16:36:53,295 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:36:53,295 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-18 16:36:53,296 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-18 16:36:53,296 INFO ]: Found error trace [2018-06-18 16:36:53,296 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-18 16:36:53,297 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-18 16:36:53,297 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-18 16:36:53,297 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-18 16:36:53,297 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-18 16:36:53,298 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:53,298 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-18 16:36:53,298 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-18 16:36:53,336 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:53,337 WARN ]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-06-18 16:36:53,642 INFO ]: Checked inductivity of 21 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-06-18 16:36:53,642 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-18 16:36:53,671 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-18 16:36:53,677 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-18 16:36:53,768 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-18 16:36:53,768 INFO ]: Conjunction of SSA is unsat [2018-06-18 16:36:53,772 INFO ]: Computing forward predicates... [2018-06-18 16:36:53,975 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:36:53,993 WARN ]: expecting exponential blowup for input size 7 [2018-06-18 16:36:54,013 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:36:54,034 WARN ]: expecting exponential blowup for input size 6 [2018-06-18 16:36:54,701 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 14 [2018-06-18 16:36:54,899 WARN ]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 27 [2018-06-18 16:36:55,095 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-18 16:36:55,115 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-18 16:36:55,115 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 13 [2018-06-18 16:36:55,115 INFO ]: Interpolant automaton has 13 states [2018-06-18 16:36:55,116 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-18 16:36:55,116 INFO ]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2018-06-18 16:36:55,116 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 13 states. [2018-06-18 16:36:55,416 WARN ]: Spent 246.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2018-06-18 16:36:55,546 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-18 16:36:55,546 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-18 16:36:55,549 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-18 16:36:55,549 INFO ]: Start accepts. Automaton has 13 states. Word has length 21 [2018-06-18 16:36:55,549 INFO ]: Finished accepts. some prefix is accepted. [2018-06-18 16:36:55,549 INFO ]: With dead ends: 13 [2018-06-18 16:36:55,549 INFO ]: Without dead ends: 0 [2018-06-18 16:36:55,550 INFO ]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2018-06-18 16:36:55,550 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-18 16:36:55,550 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-18 16:36:55,550 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-18 16:36:55,550 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-18 16:36:55,550 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2018-06-18 16:36:55,550 INFO ]: Finished accepts. word is rejected. [2018-06-18 16:36:55,550 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-18 16:36:55,550 INFO ]: Interpolant automaton has 13 states. [2018-06-18 16:36:55,550 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-18 16:36:55,550 INFO ]: Finished isEmpty. No accepting run. [2018-06-18 16:36:55,555 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.06 04:36:55 BoogieIcfgContainer [2018-06-18 16:36:55,555 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-18 16:36:55,555 INFO ]: Toolchain (without parser) took 8241.55 ms. Allocated memory was 306.7 MB in the beginning and 420.5 MB in the end (delta: 113.8 MB). Free memory was 257.3 MB in the beginning and 272.6 MB in the end (delta: -15.3 MB). Peak memory consumption was 98.5 MB. Max. memory is 3.6 GB. [2018-06-18 16:36:55,556 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 306.7 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-18 16:36:55,557 INFO ]: ChcToBoogie took 102.90 ms. Allocated memory is still 306.7 MB. Free memory was 257.3 MB in the beginning and 254.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:36:55,557 INFO ]: Boogie Preprocessor took 64.24 ms. Allocated memory is still 306.7 MB. Free memory was 254.3 MB in the beginning and 253.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-18 16:36:55,557 INFO ]: RCFGBuilder took 210.00 ms. Allocated memory is still 306.7 MB. Free memory was 253.3 MB in the beginning and 241.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. [2018-06-18 16:36:55,558 INFO ]: TraceAbstraction took 7853.60 ms. Allocated memory was 306.7 MB in the beginning and 420.5 MB in the end (delta: 113.8 MB). Free memory was 241.3 MB in the beginning and 272.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 82.5 MB. Max. memory is 3.6 GB. [2018-06-18 16:36:55,561 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 306.7 MB. Free memory is still 272.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 102.90 ms. Allocated memory is still 306.7 MB. Free memory was 257.3 MB in the beginning and 254.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 64.24 ms. Allocated memory is still 306.7 MB. Free memory was 254.3 MB in the beginning and 253.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 210.00 ms. Allocated memory is still 306.7 MB. Free memory was 253.3 MB in the beginning and 241.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 7853.60 ms. Allocated memory was 306.7 MB in the beginning and 420.5 MB in the end (delta: 113.8 MB). Free memory was 241.3 MB in the beginning and 272.6 MB in the end (delta: -31.2 MB). Peak memory consumption was 82.5 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, 7.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 28 SDslu, 122 SDs, 0 SdLazy, 102 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.2s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 104 ConstructedInterpolants, 0 QuantifiedInterpolants, 14060 SizeOfPredicates, 74 NumberOfNonLiveVariables, 717 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 30/68 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e7_223_e7_213.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-18_16-36-55-574.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/speed2_e7_223_e7_213.smt2_chcToBoogie_automizer.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-18_16-36-55-574.csv Received shutdown request...