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.4.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 04:51:47,538 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 04:51:47,540 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 04:51:47,550 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 04:51:47,551 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 04:51:47,552 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 04:51:47,553 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 04:51:47,555 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 04:51:47,556 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 04:51:47,557 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 04:51:47,560 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 04:51:47,561 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 04:51:47,562 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 04:51:47,563 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 04:51:47,564 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 04:51:47,564 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 04:51:47,567 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 04:51:47,569 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 04:51:47,571 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 04:51:47,572 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 04:51:47,573 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 04:51:47,575 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 04:51:47,575 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 04:51:47,576 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 04:51:47,576 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 04:51:47,577 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 04:51:47,578 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 04:51:47,579 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 04:51:47,580 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 04:51:47,580 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 04:51:47,581 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 04:51:47,581 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 04:51:47,581 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 04:51:47,582 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 04:51:47,583 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 04:51:47,583 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 04:51:47,596 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 04:51:47,597 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 04:51:47,597 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 04:51:47,597 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 04:51:47,598 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 04:51:47,599 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 04:51:47,599 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 04:51:47,599 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 04:51:47,599 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:51:47,599 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 04:51:47,599 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 04:51:47,600 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 04:51:47,602 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 04:51:47,602 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 04:51:47,652 INFO ]: Repository-Root is: /tmp [2018-06-22 04:51:47,669 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 04:51:47,673 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 04:51:47,675 INFO ]: Initializing SmtParser... [2018-06-22 04:51:47,675 INFO ]: SmtParser initialized [2018-06-22 04:51:47,676 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 [2018-06-22 04:51:47,677 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 04:51:47,766 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 unknown [2018-06-22 04:51:49,088 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.4.smt2 [2018-06-22 04:51:49,103 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 04:51:49,109 INFO ]: Walking toolchain with 4 elements. [2018-06-22 04:51:49,109 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 04:51:49,109 INFO ]: Initializing ChcToBoogie... [2018-06-22 04:51:49,109 INFO ]: ChcToBoogie initialized [2018-06-22 04:51:49,113 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,195 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49 Unit [2018-06-22 04:51:49,195 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 04:51:49,195 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 04:51:49,195 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 04:51:49,195 INFO ]: Boogie Preprocessor initialized [2018-06-22 04:51:49,221 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,221 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,255 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,255 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,298 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,300 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,314 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... [2018-06-22 04:51:49,330 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 04:51:49,331 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 04:51:49,331 INFO ]: Initializing RCFGBuilder... [2018-06-22 04:51:49,331 INFO ]: RCFGBuilder initialized [2018-06-22 04:51:49,332 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 04:51:49,348 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 04:51:49,348 INFO ]: Found specification of procedure gotoProc [2018-06-22 04:51:49,348 INFO ]: Found implementation of procedure gotoProc [2018-06-22 04:51:49,348 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 04:51:49,348 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 04:51:49,348 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 04:51:50,322 INFO ]: Using library mode [2018-06-22 04:51:50,322 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:51:50 BoogieIcfgContainer [2018-06-22 04:51:50,322 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 04:51:50,326 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 04:51:50,326 INFO ]: Initializing TraceAbstraction... [2018-06-22 04:51:50,330 INFO ]: TraceAbstraction initialized [2018-06-22 04:51:50,330 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 04:51:49" (1/3) ... [2018-06-22 04:51:50,331 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4e878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 04:51:50, skipping insertion in model container [2018-06-22 04:51:50,331 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 04:51:49" (2/3) ... [2018-06-22 04:51:50,331 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d4e878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 04:51:50, skipping insertion in model container [2018-06-22 04:51:50,331 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 04:51:50" (3/3) ... [2018-06-22 04:51:50,333 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 04:51:50,342 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 04:51:50,350 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 04:51:50,391 INFO ]: Using default assertion order modulation [2018-06-22 04:51:50,392 INFO ]: Interprodecural is true [2018-06-22 04:51:50,392 INFO ]: Hoare is false [2018-06-22 04:51:50,392 INFO ]: Compute interpolants for FPandBP [2018-06-22 04:51:50,392 INFO ]: Backedges is TWOTRACK [2018-06-22 04:51:50,392 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 04:51:50,392 INFO ]: Difference is false [2018-06-22 04:51:50,392 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 04:51:50,392 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 04:51:50,404 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 04:51:50,413 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 04:51:50,413 INFO ]: Found error trace [2018-06-22 04:51:50,414 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:50,414 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:50,419 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 04:51:50,422 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:50,422 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:50,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:50,459 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:50,459 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:50,618 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:50,748 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:50,750 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 04:51:50,750 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 04:51:50,751 INFO ]: Interpolant automaton has 3 states [2018-06-22 04:51:50,761 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 04:51:50,762 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 04:51:50,764 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 04:51:50,897 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:50,897 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 04:51:50,899 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 04:51:50,900 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 04:51:50,900 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:50,909 INFO ]: With dead ends: 9 [2018-06-22 04:51:50,910 INFO ]: Without dead ends: 9 [2018-06-22 04:51:50,914 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 04:51:50,932 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 04:51:50,961 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 04:51:50,962 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 04:51:50,963 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 04:51:50,964 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 04:51:50,964 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:50,964 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 04:51:50,964 INFO ]: Interpolant automaton has 3 states. [2018-06-22 04:51:50,964 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 04:51:50,964 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 04:51:50,964 INFO ]: Found error trace [2018-06-22 04:51:50,965 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:50,965 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:50,965 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 04:51:50,966 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:50,966 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:50,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:50,966 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:50,966 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:51,250 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:51,696 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:51,696 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:51:51,696 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 04:51:51,710 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:52,000 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:52,023 INFO ]: Computing forward predicates... [2018-06-22 04:51:53,123 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:53,145 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:51:53,145 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 04:51:53,146 INFO ]: Interpolant automaton has 6 states [2018-06-22 04:51:53,146 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 04:51:53,146 INFO ]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-22 04:51:53,146 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 04:51:53,320 WARN ]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 04:51:53,458 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:53,459 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 04:51:53,460 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 04:51:53,460 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 04:51:53,460 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:53,460 INFO ]: With dead ends: 11 [2018-06-22 04:51:53,460 INFO ]: Without dead ends: 11 [2018-06-22 04:51:53,461 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2018-06-22 04:51:53,461 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 04:51:53,462 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 04:51:53,462 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 04:51:53,462 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 04:51:53,463 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 04:51:53,463 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:53,463 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 04:51:53,463 INFO ]: Interpolant automaton has 6 states. [2018-06-22 04:51:53,463 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 04:51:53,463 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 04:51:53,463 INFO ]: Found error trace [2018-06-22 04:51:53,463 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:53,463 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:53,463 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 04:51:53,463 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:53,463 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:53,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:53,464 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 04:51:53,464 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:53,790 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:54,583 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:54,583 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:51:54,583 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:51:54,592 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 04:51:54,952 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 04:51:54,952 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:54,988 INFO ]: Computing forward predicates... [2018-06-22 04:51:58,171 WARN ]: Spent 1000.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2018-06-22 04:51:58,176 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:51:58,199 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 04:51:58,200 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 04:51:58,200 INFO ]: Interpolant automaton has 10 states [2018-06-22 04:51:58,200 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 04:51:58,200 INFO ]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2018-06-22 04:51:58,200 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 04:51:58,579 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 04:51:58,579 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 04:51:58,579 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 04:51:58,579 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 04:51:58,579 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 04:51:58,580 INFO ]: With dead ends: 12 [2018-06-22 04:51:58,580 INFO ]: Without dead ends: 12 [2018-06-22 04:51:58,580 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2018-06-22 04:51:58,580 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 04:51:58,581 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 04:51:58,581 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 04:51:58,582 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 04:51:58,582 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 04:51:58,582 INFO ]: Finished accepts. word is rejected. [2018-06-22 04:51:58,582 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 04:51:58,582 INFO ]: Interpolant automaton has 10 states. [2018-06-22 04:51:58,582 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 04:51:58,582 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 04:51:58,582 INFO ]: Found error trace [2018-06-22 04:51:58,582 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 04:51:58,582 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 04:51:58,583 INFO ]: Analyzing trace with hash -1433955954, now seen corresponding path program 3 times [2018-06-22 04:51:58,583 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 04:51:58,583 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 04:51:58,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:58,583 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 04:51:58,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 04:51:58,896 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:51:59,927 WARN ]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 04:52:00,179 WARN ]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 04:52:00,290 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 04:52:00,290 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 04:52:00,290 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 04:52:00,299 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 04:52:00,734 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 04:52:00,735 INFO ]: Conjunction of SSA is unsat [2018-06-22 04:52:00,769 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 04:52:54,877 INFO ]: Timeout while computing interpolants [2018-06-22 04:52:55,079 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 04:52:55,080 WARN ]: Verification canceled [2018-06-22 04:52:55,084 WARN ]: Timeout [2018-06-22 04:52:55,084 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 04:52:55 BoogieIcfgContainer [2018-06-22 04:52:55,084 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 04:52:55,085 INFO ]: Toolchain (without parser) took 65981.52 ms. Allocated memory was 330.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 218.1 MB in the beginning and 997.0 MB in the end (delta: -778.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:52:55,086 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 04:52:55,086 INFO ]: ChcToBoogie took 85.91 ms. Allocated memory is still 330.8 MB. Free memory was 218.1 MB in the beginning and 213.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:55,087 INFO ]: Boogie Preprocessor took 134.93 ms. Allocated memory is still 330.8 MB. Free memory was 213.3 MB in the beginning and 210.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:55,087 INFO ]: RCFGBuilder took 991.59 ms. Allocated memory was 330.8 MB in the beginning and 370.7 MB in the end (delta: 39.8 MB). Free memory was 208.5 MB in the beginning and 211.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 38.2 MB. Max. memory is 3.6 GB. [2018-06-22 04:52:55,087 INFO ]: TraceAbstraction took 64758.12 ms. Allocated memory was 370.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 209.0 MB in the beginning and 997.0 MB in the end (delta: -787.9 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 04:52:55,089 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.08 ms. Allocated memory is still 306.2 MB. Free memory is still 271.7 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 85.91 ms. Allocated memory is still 330.8 MB. Free memory was 218.1 MB in the beginning and 213.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 4.8 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 134.93 ms. Allocated memory is still 330.8 MB. Free memory was 213.3 MB in the beginning and 210.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 3.6 GB. * RCFGBuilder took 991.59 ms. Allocated memory was 330.8 MB in the beginning and 370.7 MB in the end (delta: 39.8 MB). Free memory was 208.5 MB in the beginning and 211.6 MB in the end (delta: -3.1 MB). Peak memory consumption was 38.2 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64758.12 ms. Allocated memory was 370.7 MB in the beginning and 1.5 GB in the end (delta: 1.1 GB). Free memory was 209.0 MB in the beginning and 997.0 MB in the end (delta: -787.9 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 33 quantified variables from 5 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 64.7s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 21 SDtfs, 2 SDslu, 49 SDs, 0 SdLazy, 24 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.2s 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: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 1199 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2566 ConjunctsInSsa, 39 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/14 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.4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_04-52-55-104.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.4.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_04-52-55-104.csv Completed graceful shutdown