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_No_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:30:29,348 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:30:29,352 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:30:29,365 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:30:29,366 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:30:29,367 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:30:29,370 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:30:29,372 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:30:29,373 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:30:29,374 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:30:29,375 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:30:29,375 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:30:29,376 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:30:29,377 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:30:29,380 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:30:29,380 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:30:29,382 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:30:29,391 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:30:29,392 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:30:29,393 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:30:29,394 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:30:29,396 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:30:29,399 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:30:29,399 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:30:29,399 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:30:29,400 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:30:29,401 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:30:29,401 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:30:29,405 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:30:29,405 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:30:29,406 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:30:29,406 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:30:29,406 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:30:29,407 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:30:29,408 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:30:29,409 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:30:29,427 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:30:29,427 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:30:29,427 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:30:29,427 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:30:29,428 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:30:29,428 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:30:29,429 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:30:29,429 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:30:29,429 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:30:29,429 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:30:29,429 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:30:29,429 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:30:29,430 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:30:29,432 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:30:29,432 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:30:29,432 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:30:29,433 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:30:29,433 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:30:29,433 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:30:29,434 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:30:29,434 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:30:29,472 INFO ]: Repository-Root is: /tmp [2018-06-22 14:30:29,482 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:30:29,486 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:30:29,489 INFO ]: Initializing SmtParser... [2018-06-22 14:30:29,489 INFO ]: SmtParser initialized [2018-06-22 14:30:29,490 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.1.smt2 [2018-06-22 14:30:29,491 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 14:30:29,578 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.1.smt2 unknown [2018-06-22 14:30:30,043 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.1.smt2 [2018-06-22 14:30:30,054 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:30:30,069 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:30:30,070 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:30:30,070 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:30:30,070 INFO ]: ChcToBoogie initialized [2018-06-22 14:30:30,073 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,179 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30 Unit [2018-06-22 14:30:30,180 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:30:30,180 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:30:30,180 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:30:30,180 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:30:30,202 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,202 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,221 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,221 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,241 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,242 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,245 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (1/1) ... [2018-06-22 14:30:30,258 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:30:30,259 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:30:30,259 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:30:30,259 INFO ]: RCFGBuilder initialized [2018-06-22 14:30:30,259 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (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 14:30:30,292 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:30:30,292 INFO ]: Found specification of procedure False [2018-06-22 14:30:30,292 INFO ]: Found implementation of procedure False [2018-06-22 14:30:30,293 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:30:30,293 INFO ]: Found specification of procedure state [2018-06-22 14:30:30,293 INFO ]: Found implementation of procedure state [2018-06-22 14:30:30,293 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:30:30,293 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:30:30,293 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 14:30:30,768 INFO ]: Using library mode [2018-06-22 14:30:30,768 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:30:30 BoogieIcfgContainer [2018-06-22 14:30:30,768 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:30:30,770 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:30:30,770 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:30:30,780 INFO ]: TraceAbstraction initialized [2018-06-22 14:30:30,780 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:30:30" (1/3) ... [2018-06-22 14:30:30,781 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35062fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:30:30, skipping insertion in model container [2018-06-22 14:30:30,781 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:30:30" (2/3) ... [2018-06-22 14:30:30,782 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35062fea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:30:30, skipping insertion in model container [2018-06-22 14:30:30,782 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:30:30" (3/3) ... [2018-06-22 14:30:30,784 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:30:30,793 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:30:30,802 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:30:30,849 INFO ]: Using default assertion order modulation [2018-06-22 14:30:30,850 INFO ]: Interprodecural is true [2018-06-22 14:30:30,850 INFO ]: Hoare is false [2018-06-22 14:30:30,850 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:30:30,850 INFO ]: Backedges is TWOTRACK [2018-06-22 14:30:30,850 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:30:30,850 INFO ]: Difference is false [2018-06-22 14:30:30,850 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:30:30,850 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:30:30,863 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:30:30,873 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:30:30,873 INFO ]: Found error trace [2018-06-22 14:30:30,874 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:30,874 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:30,879 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:30:30,881 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:30,881 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:30,930 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:30,930 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:30:30,930 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:30,983 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:31,138 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:30:31,157 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:30:31,157 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:30:31,159 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:30:31,174 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:30:31,175 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:30:31,177 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:30:31,316 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:31,316 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:30:31,317 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:30:31,318 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:30:31,318 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:31,330 INFO ]: With dead ends: 13 [2018-06-22 14:30:31,330 INFO ]: Without dead ends: 13 [2018-06-22 14:30:31,331 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:30:31,346 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:30:31,366 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:30:31,367 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:30:31,368 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:30:31,369 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:30:31,369 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:31,369 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:30:31,369 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:30:31,369 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:30:31,370 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:30:31,370 INFO ]: Found error trace [2018-06-22 14:30:31,371 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:31,371 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:31,371 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:30:31,371 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:31,371 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:31,372 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:31,372 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:30:31,372 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:31,500 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:31,946 WARN ]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:30:32,165 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:30:32,165 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:32,165 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) [2018-06-22 14:30:32,182 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:30:32,283 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:32,293 INFO ]: Computing forward predicates... [2018-06-22 14:30:33,035 WARN ]: Spent 180.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 16 [2018-06-22 14:30:33,200 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:30:33,221 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:33,221 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:30:33,222 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:30:33,222 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:30:33,222 INFO ]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:30:33,222 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:30:33,715 WARN ]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 14:30:34,010 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:34,010 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:30:34,011 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:30:34,011 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:30:34,011 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:34,012 INFO ]: With dead ends: 17 [2018-06-22 14:30:34,012 INFO ]: Without dead ends: 17 [2018-06-22 14:30:34,013 INFO ]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:30:34,013 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:30:34,016 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:30:34,016 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:30:34,017 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:30:34,017 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2018-06-22 14:30:34,017 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:34,017 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:30:34,017 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:30:34,017 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:30:34,018 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:30:34,018 INFO ]: Found error trace [2018-06-22 14:30:34,018 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:34,018 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:34,018 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 2 times [2018-06-22 14:30:34,018 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:34,018 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:34,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:34,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:30:34,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:34,137 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:34,593 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:30:34,593 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:34,593 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 14:30:34,608 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:30:34,753 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:30:34,753 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:34,766 INFO ]: Computing forward predicates... [2018-06-22 14:30:35,071 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2018-06-22 14:30:35,361 WARN ]: Spent 168.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 18 [2018-06-22 14:30:35,630 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2018-06-22 14:30:35,722 INFO ]: Checked inductivity of 21 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:30:35,755 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:30:35,755 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-06-22 14:30:35,755 INFO ]: Interpolant automaton has 17 states [2018-06-22 14:30:35,755 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 14:30:35,756 INFO ]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:30:35,756 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 17 states. [2018-06-22 14:30:36,013 WARN ]: Spent 178.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2018-06-22 14:30:36,196 WARN ]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 22 [2018-06-22 14:30:36,541 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2018-06-22 14:30:36,575 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:30:36,575 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:30:36,576 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:30:36,576 INFO ]: Start accepts. Automaton has 17 states. Word has length 21 [2018-06-22 14:30:36,576 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:30:36,577 INFO ]: With dead ends: 19 [2018-06-22 14:30:36,577 INFO ]: Without dead ends: 19 [2018-06-22 14:30:36,577 INFO ]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2018-06-22 14:30:36,577 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:30:36,580 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:30:36,580 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:30:36,581 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:30:36,581 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:30:36,581 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:30:36,581 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:30:36,581 INFO ]: Interpolant automaton has 17 states. [2018-06-22 14:30:36,581 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:30:36,582 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:30:36,582 INFO ]: Found error trace [2018-06-22 14:30:36,582 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:30:36,582 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:30:36,582 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 14:30:36,582 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:30:36,582 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:30:36,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:36,583 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:30:36,583 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:30:36,691 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:37,027 WARN ]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 4 [2018-06-22 14:30:37,330 WARN ]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-22 14:30:37,722 WARN ]: Spent 318.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 14:30:38,065 WARN ]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-06-22 14:30:38,241 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:30:38,241 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:30:38,241 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 14:30:38,250 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:30:38,453 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 14:30:38,453 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:30:38,466 INFO ]: Computing forward predicates... [2018-06-22 14:30:38,960 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2018-06-22 14:31:03,721 WARN ]: Simplifying disjunction of 7290 conjuctions. This might take some time... [2018-06-22 14:31:12,768 INFO ]: Simplified to disjunction of 7290 conjuctions. [2018-06-22 14:31:17,148 WARN ]: Simplifying disjunction of 7074 conjuctions. This might take some time... [2018-06-22 14:31:24,664 INFO ]: Simplified to disjunction of 7074 conjuctions. [2018-06-22 14:31:33,371 WARN ]: Spent 192.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 30 Received shutdown request... [2018-06-22 14:31:40,494 INFO ]: Timeout while computing interpolants [2018-06-22 14:31:40,694 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:31:40,694 WARN ]: Verification canceled [2018-06-22 14:31:40,698 WARN ]: Timeout [2018-06-22 14:31:40,699 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:31:40 BoogieIcfgContainer [2018-06-22 14:31:40,699 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:31:40,700 INFO ]: Toolchain (without parser) took 70644.45 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 238.4 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:31:40,700 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:31:40,701 INFO ]: ChcToBoogie took 110.24 ms. Allocated memory is still 308.8 MB. Free memory was 238.4 MB in the beginning and 235.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:31:40,701 INFO ]: Boogie Preprocessor took 77.96 ms. Allocated memory is still 308.8 MB. Free memory was 235.4 MB in the beginning and 233.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:31:40,702 INFO ]: RCFGBuilder took 509.91 ms. Allocated memory is still 308.8 MB. Free memory was 233.4 MB in the beginning and 204.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:31:40,702 INFO ]: TraceAbstraction took 69929.15 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 204.0 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 3.6 GB. [2018-06-22 14:31:40,705 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 308.8 MB. Free memory is still 274.4 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 110.24 ms. Allocated memory is still 308.8 MB. Free memory was 238.4 MB in the beginning and 235.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 77.96 ms. Allocated memory is still 308.8 MB. Free memory was 235.4 MB in the beginning and 233.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 509.91 ms. Allocated memory is still 308.8 MB. Free memory was 233.4 MB in the beginning and 204.0 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69929.15 ms. Allocated memory was 308.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 204.0 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.2 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 26 with TraceHistMax 5, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 4860 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 69.8s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 1.7s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 34 SDtfs, 34 SDslu, 111 SDs, 0 SdLazy, 81 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 8444 SizeOfPredicates, 515 NumberOfNonLiveVariables, 720 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 15/48 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.1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-31-40-715.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-31-40-715.csv Completed graceful shutdown