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/cav12/token_ring.7.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:53:42,361 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:53:42,362 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:53:42,374 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:53:42,375 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:53:42,376 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:53:42,380 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:53:42,382 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:53:42,384 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:53:42,386 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:53:42,387 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:53:42,387 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:53:42,388 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:53:42,391 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:53:42,392 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:53:42,393 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:53:42,394 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:53:42,408 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:53:42,410 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:53:42,411 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:53:42,412 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:53:42,414 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:53:42,414 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:53:42,414 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:53:42,415 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:53:42,417 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:53:42,418 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:53:42,419 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:53:42,420 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:53:42,420 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:53:42,421 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:53:42,421 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:53:42,422 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:53:42,422 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:53:42,423 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:53:42,423 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:53:42,444 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:53:42,444 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:53:42,444 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:53:42,445 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:53:42,446 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:53:42,446 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:53:42,446 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:53:42,446 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:53:42,446 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:53:42,447 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:53:42,447 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:53:42,447 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:53:42,447 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:53:42,447 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:53:42,448 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:53:42,448 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:53:42,448 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:53:42,451 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:53:42,451 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:53:42,510 INFO ]: Repository-Root is: /tmp [2018-06-22 04:53:42,529 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:53:42,535 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:53:42,537 INFO ]: Initializing SmtParser... [2018-06-22 04:53:42,537 INFO ]: SmtParser initialized [2018-06-22 04:53:42,538 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 [2018-06-22 04:53:42,539 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 04:53:42,639 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 unknown [2018-06-22 04:53:45,273 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.7.smt2 [2018-06-22 04:53:45,278 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:53:45,286 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:53:45,286 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:53:45,286 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:53:45,286 INFO ]: ChcToBoogie initialized [2018-06-22 04:53:45,290 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,416 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45 Unit [2018-06-22 04:53:45,416 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:53:45,417 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:53:45,417 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:53:45,417 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:53:45,435 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,435 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,481 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,482 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,538 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,540 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,556 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (1/1) ... [2018-06-22 04:53:45,578 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:53:45,579 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:53:45,579 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:53:45,579 INFO ]: RCFGBuilder initialized [2018-06-22 04:53:45,580 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (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 [2018-06-22 04:53:45,592 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:53:45,592 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:53:45,592 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:53:45,592 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:53:45,592 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:53:45,592 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 04:53:47,886 INFO ]: Using library mode [2018-06-22 04:53:47,887 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:53:47 BoogieIcfgContainer [2018-06-22 04:53:47,887 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:53:47,888 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:53:47,888 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:53:47,892 INFO ]: TraceAbstraction initialized [2018-06-22 04:53:47,892 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:53:45" (1/3) ... [2018-06-22 04:53:47,893 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36f1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:53:47, skipping insertion in model container [2018-06-22 04:53:47,893 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:53:45" (2/3) ... [2018-06-22 04:53:47,893 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f36f1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:53:47, skipping insertion in model container [2018-06-22 04:53:47,893 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:53:47" (3/3) ... [2018-06-22 04:53:47,895 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:53:47,905 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:53:47,915 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:53:47,968 INFO ]: Using default assertion order modulation [2018-06-22 04:53:47,968 INFO ]: Interprodecural is true [2018-06-22 04:53:47,968 INFO ]: Hoare is false [2018-06-22 04:53:47,968 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:53:47,968 INFO ]: Backedges is TWOTRACK [2018-06-22 04:53:47,968 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:53:47,969 INFO ]: Difference is false [2018-06-22 04:53:47,969 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:53:47,969 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:53:47,984 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:53:47,997 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:53:47,997 INFO ]: Found error trace [2018-06-22 04:53:47,998 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:53:47,999 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:53:48,004 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 04:53:48,007 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:53:48,007 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:53:48,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:48,053 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:53:48,053 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:48,276 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:53:48,470 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:53:48,472 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:53:48,472 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:53:48,473 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:53:48,484 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:53:48,484 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:53:48,486 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:53:48,711 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:53:48,711 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:53:48,711 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:53:48,713 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:53:48,713 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:53:48,726 INFO ]: With dead ends: 9 [2018-06-22 04:53:48,726 INFO ]: Without dead ends: 9 [2018-06-22 04:53:48,728 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 04:53:48,747 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:53:48,771 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:53:48,772 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:53:48,773 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:53:48,777 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:53:48,778 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:53:48,778 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:53:48,778 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:53:48,778 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:53:48,778 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:53:48,778 INFO ]: Found error trace [2018-06-22 04:53:48,778 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:53:48,778 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:53:48,779 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 04:53:48,779 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:53:48,779 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:53:48,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:48,780 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:53:48,780 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:49,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:53:49,971 WARN ]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:53:50,105 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:53:50,106 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:53:50,106 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 04:53:50,121 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:53:50,757 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:53:50,799 INFO ]: Computing forward predicates... [2018-06-22 04:53:52,379 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:53:52,422 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:53:52,422 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 04:53:52,422 INFO ]: Interpolant automaton has 5 states [2018-06-22 04:53:52,423 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 04:53:52,423 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-22 04:53:52,423 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 04:53:52,838 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:53:52,838 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 04:53:52,839 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 04:53:52,839 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 04:53:52,839 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:53:52,839 INFO ]: With dead ends: 10 [2018-06-22 04:53:52,839 INFO ]: Without dead ends: 10 [2018-06-22 04:53:52,840 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:53:52,840 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 04:53:52,841 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 04:53:52,841 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 04:53:52,841 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 04:53:52,842 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 04:53:52,842 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:53:52,842 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 04:53:52,842 INFO ]: Interpolant automaton has 5 states. [2018-06-22 04:53:52,842 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 04:53:52,842 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 04:53:52,842 INFO ]: Found error trace [2018-06-22 04:53:52,842 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:53:52,842 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:53:52,842 INFO ]: Analyzing trace with hash -2043975570, now seen corresponding path program 2 times [2018-06-22 04:53:52,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:53:52,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:53:52,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:52,843 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:53:52,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:53,426 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:53:54,431 WARN ]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:53:54,721 WARN ]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 04:53:54,722 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:53:54,722 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:53:54,722 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) [2018-06-22 04:53:54,740 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:53:55,442 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:53:55,442 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:53:55,496 INFO ]: Computing forward predicates... [2018-06-22 04:53:57,557 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 17 [2018-06-22 04:53:57,562 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:53:57,590 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:53:57,590 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-06-22 04:53:57,590 INFO ]: Interpolant automaton has 7 states [2018-06-22 04:53:57,590 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 04:53:57,590 INFO ]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:53:57,590 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2018-06-22 04:53:57,838 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:53:57,838 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:53:57,838 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 04:53:57,838 INFO ]: Start accepts. Automaton has 7 states. Word has length 9 [2018-06-22 04:53:57,838 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:53:57,838 INFO ]: With dead ends: 12 [2018-06-22 04:53:57,838 INFO ]: Without dead ends: 12 [2018-06-22 04:53:57,839 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2018-06-22 04:53:57,839 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:53:57,840 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:53:57,840 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:53:57,841 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:53:57,841 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2018-06-22 04:53:57,841 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:53:57,841 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:53:57,841 INFO ]: Interpolant automaton has 7 states. [2018-06-22 04:53:57,841 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:53:57,841 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:53:57,841 INFO ]: Found error trace [2018-06-22 04:53:57,841 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:53:57,841 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:53:57,842 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 04:53:57,842 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:53:57,842 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:53:57,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:57,843 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:53:57,843 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:53:58,881 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:54:00,187 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 04:54:00,355 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 4 DAG size of output: 1 [2018-06-22 04:54:00,477 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:54:00,477 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:54:00,477 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:54:00,483 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:54:01,360 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:54:01,360 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:54:01,444 INFO ]: Computing forward predicates... [2018-06-22 04:54:12,685 WARN ]: Spent 129.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 21 Received shutdown request... [2018-06-22 04:54:45,852 INFO ]: Timeout while computing interpolants [2018-06-22 04:54:46,053 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:54:46,053 WARN ]: Verification canceled [2018-06-22 04:54:46,058 WARN ]: Timeout [2018-06-22 04:54:46,058 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:54:46 BoogieIcfgContainer [2018-06-22 04:54:46,058 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:54:46,059 INFO ]: Toolchain (without parser) took 60781.09 ms. Allocated memory was 413.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 206.5 MB in the beginning and 1.3 GB in the end (delta: -1.1 GB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 04:54:46,060 INFO ]: SmtParser took 0.10 ms. Allocated memory is still 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:54:46,060 INFO ]: ChcToBoogie took 130.14 ms. Allocated memory is still 413.7 MB. Free memory was 206.5 MB in the beginning and 195.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:54:46,060 INFO ]: Boogie Preprocessor took 161.79 ms. Allocated memory is still 413.7 MB. Free memory was 195.3 MB in the beginning and 188.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 3.6 GB. [2018-06-22 04:54:46,061 INFO ]: RCFGBuilder took 2307.99 ms. Allocated memory was 413.7 MB in the beginning and 537.4 MB in the end (delta: 123.7 MB). Free memory was 188.1 MB in the beginning and 395.3 MB in the end (delta: -207.1 MB). Peak memory consumption was 149.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:54:46,061 INFO ]: TraceAbstraction took 58170.04 ms. Allocated memory was 537.4 MB in the beginning and 1.5 GB in the end (delta: 971.0 MB). Free memory was 395.3 MB in the beginning and 1.3 GB in the end (delta: -933.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:54:46,063 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.10 ms. Allocated memory is still 304.1 MB. Free memory is still 269.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 130.14 ms. Allocated memory is still 413.7 MB. Free memory was 206.5 MB in the beginning and 195.3 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 161.79 ms. Allocated memory is still 413.7 MB. Free memory was 195.3 MB in the beginning and 188.1 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 2307.99 ms. Allocated memory was 413.7 MB in the beginning and 537.4 MB in the end (delta: 123.7 MB). Free memory was 188.1 MB in the beginning and 395.3 MB in the end (delta: -207.1 MB). Peak memory consumption was 149.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 58170.04 ms. Allocated memory was 537.4 MB in the beginning and 1.5 GB in the end (delta: 971.0 MB). Free memory was 395.3 MB in the beginning and 1.3 GB in the end (delta: -933.2 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was analyzing trace of length 12 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 689 quantified variables from 9 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 58.1s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 30 SDs, 0 SdLazy, 18 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 768 SizeOfPredicates, 5 NumberOfNonLiveVariables, 4434 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.7.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-54-46-076.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.7.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-54-46-076.csv Completed graceful shutdown