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.8.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:34:24,164 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:34:24,166 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:34:24,177 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:34:24,177 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:34:24,178 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:34:24,179 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:34:24,181 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:34:24,183 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:34:24,184 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:34:24,185 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:34:24,185 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:34:24,186 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:34:24,187 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:34:24,188 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:34:24,189 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:34:24,190 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:34:24,192 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:34:24,194 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:34:24,195 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:34:24,196 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:34:24,199 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:34:24,199 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:34:24,200 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:34:24,200 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:34:24,201 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:34:24,202 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:34:24,203 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:34:24,204 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:34:24,204 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:34:24,205 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:34:24,206 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:34:24,206 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:34:24,207 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:34:24,208 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:34:24,208 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 14:34:24,228 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:34:24,228 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:34:24,229 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:34:24,229 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:34:24,230 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:34:24,230 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:34:24,231 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:34:24,231 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:34:24,231 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:34:24,231 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:34:24,231 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:34:24,232 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:34:24,232 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:34:24,232 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:34:24,232 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:34:24,233 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:34:24,233 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:34:24,233 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:34:24,233 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:34:24,235 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:34:24,235 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:34:24,280 INFO ]: Repository-Root is: /tmp [2018-06-22 14:34:24,302 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:34:24,306 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:34:24,307 INFO ]: Initializing SmtParser... [2018-06-22 14:34:24,308 INFO ]: SmtParser initialized [2018-06-22 14:34:24,308 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.8.smt2 [2018-06-22 14:34:24,310 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 14:34:24,406 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.8.smt2 unknown [2018-06-22 14:34:27,279 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/cav12/token_ring.8.smt2 [2018-06-22 14:34:27,284 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:34:27,289 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:34:27,290 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:34:27,290 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:34:27,290 INFO ]: ChcToBoogie initialized [2018-06-22 14:34:27,293 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,406 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27 Unit [2018-06-22 14:34:27,406 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:34:27,407 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:34:27,407 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:34:27,407 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:34:27,430 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,430 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,474 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,474 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,516 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,517 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,538 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (1/1) ... [2018-06-22 14:34:27,558 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:34:27,559 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:34:27,559 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:34:27,559 INFO ]: RCFGBuilder initialized [2018-06-22 14:34:27,560 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (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 14:34:27,577 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:34:27,577 INFO ]: Found specification of procedure False [2018-06-22 14:34:27,577 INFO ]: Found implementation of procedure False [2018-06-22 14:34:27,577 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:34:27,577 INFO ]: Found specification of procedure state [2018-06-22 14:34:27,577 INFO ]: Found implementation of procedure state [2018-06-22 14:34:27,577 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:34:27,577 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:34:27,577 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 14:34:30,528 INFO ]: Using library mode [2018-06-22 14:34:30,529 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:34:30 BoogieIcfgContainer [2018-06-22 14:34:30,530 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:34:30,531 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:34:30,532 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:34:30,536 INFO ]: TraceAbstraction initialized [2018-06-22 14:34:30,536 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:34:27" (1/3) ... [2018-06-22 14:34:30,537 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@decde2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:34:30, skipping insertion in model container [2018-06-22 14:34:30,537 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:34:27" (2/3) ... [2018-06-22 14:34:30,537 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@decde2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:34:30, skipping insertion in model container [2018-06-22 14:34:30,537 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:34:30" (3/3) ... [2018-06-22 14:34:30,539 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:34:30,548 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:34:30,557 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:34:30,606 INFO ]: Using default assertion order modulation [2018-06-22 14:34:30,728 INFO ]: Interprodecural is true [2018-06-22 14:34:30,728 INFO ]: Hoare is false [2018-06-22 14:34:30,728 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:34:30,728 INFO ]: Backedges is TWOTRACK [2018-06-22 14:34:30,728 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:34:30,728 INFO ]: Difference is false [2018-06-22 14:34:30,728 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:34:30,728 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:34:30,740 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:34:30,750 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:34:30,750 INFO ]: Found error trace [2018-06-22 14:34:30,751 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:30,751 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:30,761 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:34:30,762 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:30,763 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:30,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:30,804 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:30,804 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:30,970 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:31,192 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:34:31,195 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:34:31,195 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:34:31,197 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:34:31,213 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:34:31,213 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:34:31,215 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:34:31,558 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:31,558 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:34:31,560 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:34:31,562 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:34:31,562 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:31,576 INFO ]: With dead ends: 13 [2018-06-22 14:34:31,576 INFO ]: Without dead ends: 13 [2018-06-22 14:34:31,581 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 14:34:31,599 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:34:31,635 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:34:31,636 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:34:31,637 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:34:31,638 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:34:31,639 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:31,639 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:34:31,639 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:34:31,639 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:34:31,640 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:34:31,640 INFO ]: Found error trace [2018-06-22 14:34:31,641 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:31,641 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:31,641 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:34:31,641 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:31,641 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:31,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:31,642 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:31,642 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:32,281 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:33,135 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:34:33,356 WARN ]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:34:33,720 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:34:33,722 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:34:33,723 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:33,723 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 14:34:33,738 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 14:34:34,166 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:34,213 INFO ]: Computing forward predicates... [2018-06-22 14:34:38,498 WARN ]: Spent 687.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 14:34:39,056 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:34:39,094 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:34:39,095 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 14:34:39,095 INFO ]: Interpolant automaton has 10 states [2018-06-22 14:34:39,095 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 14:34:39,095 INFO ]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2018-06-22 14:34:39,096 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 10 states. [2018-06-22 14:34:39,824 WARN ]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2018-06-22 14:34:40,370 WARN ]: Spent 324.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 5 [2018-06-22 14:34:40,493 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:40,493 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:34:40,495 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:34:40,495 INFO ]: Start accepts. Automaton has 10 states. Word has length 13 [2018-06-22 14:34:40,495 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:40,496 INFO ]: With dead ends: 15 [2018-06-22 14:34:40,496 INFO ]: Without dead ends: 15 [2018-06-22 14:34:40,497 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:34:40,497 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:34:40,499 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:34:40,499 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:34:40,499 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:34:40,500 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:34:40,500 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:40,501 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:34:40,501 INFO ]: Interpolant automaton has 10 states. [2018-06-22 14:34:40,501 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:34:40,501 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:34:40,501 INFO ]: Found error trace [2018-06-22 14:34:40,502 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:40,502 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:40,502 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:34:40,502 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:40,502 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:40,503 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:40,503 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:34:40,503 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:41,448 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:42,906 WARN ]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:34:43,125 WARN ]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 14:34:43,438 WARN ]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2018-06-22 14:34:43,695 WARN ]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-06-22 14:34:44,134 WARN ]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 14:34:44,136 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:34:44,136 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:44,136 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 14:34:44,154 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 14:34:44,781 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:34:44,781 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:44,844 INFO ]: Computing forward predicates... [2018-06-22 14:34:48,574 WARN ]: Spent 677.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 10 [2018-06-22 14:34:51,202 WARN ]: Spent 284.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2018-06-22 14:34:51,347 INFO ]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:34:51,386 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:34:51,386 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2018-06-22 14:34:51,387 INFO ]: Interpolant automaton has 13 states [2018-06-22 14:34:51,387 INFO ]: Constructing interpolant automaton starting with 13 interpolants. [2018-06-22 14:34:51,387 INFO ]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2018-06-22 14:34:51,387 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 13 states. [2018-06-22 14:34:51,677 WARN ]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2018-06-22 14:34:51,960 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2018-06-22 14:34:52,152 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2018-06-22 14:34:52,218 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:34:52,218 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:34:52,219 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:34:52,219 INFO ]: Start accepts. Automaton has 13 states. Word has length 17 [2018-06-22 14:34:52,219 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:34:52,220 INFO ]: With dead ends: 19 [2018-06-22 14:34:52,220 INFO ]: Without dead ends: 19 [2018-06-22 14:34:52,220 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2018-06-22 14:34:52,221 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:34:52,224 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:34:52,224 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:34:52,224 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:34:52,224 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2018-06-22 14:34:52,225 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:34:52,225 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:34:52,225 INFO ]: Interpolant automaton has 13 states. [2018-06-22 14:34:52,225 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:34:52,225 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:34:52,225 INFO ]: Found error trace [2018-06-22 14:34:52,226 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:34:52,226 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:34:52,226 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 3 times [2018-06-22 14:34:52,226 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:34:52,226 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:34:52,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:52,227 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:34:52,227 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:34:53,249 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:55,295 WARN ]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-06-22 14:34:55,514 WARN ]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2018-06-22 14:34:55,681 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:34:55,681 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:34:55,681 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) [2018-06-22 14:34:55,698 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:34:56,925 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-22 14:34:56,925 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:34:57,057 INFO ]: Computing forward predicates... [2018-06-22 14:34:59,761 WARN ]: Spent 208.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 13 Received shutdown request... [2018-06-22 14:35:14,157 INFO ]: Timeout while computing interpolants [2018-06-22 14:35:14,358 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:35:14,358 WARN ]: Verification canceled [2018-06-22 14:35:14,363 WARN ]: Timeout [2018-06-22 14:35:14,363 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:35:14 BoogieIcfgContainer [2018-06-22 14:35:14,363 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:35:14,364 INFO ]: Toolchain (without parser) took 47079.57 ms. Allocated memory was 440.9 MB in the beginning and 1.5 GB in the end (delta: 1.0 GB). Free memory was 275.8 MB in the beginning and 356.8 MB in the end (delta: -81.0 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-22 14:35:14,365 INFO ]: SmtParser took 0.08 ms. Allocated memory is still 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:35:14,365 INFO ]: ChcToBoogie took 116.76 ms. Allocated memory is still 440.9 MB. Free memory was 275.8 MB in the beginning and 271.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:14,365 INFO ]: Boogie Preprocessor took 151.21 ms. Allocated memory is still 440.9 MB. Free memory was 271.3 MB in the beginning and 257.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:14,365 INFO ]: RCFGBuilder took 2970.77 ms. Allocated memory was 440.9 MB in the beginning and 610.8 MB in the end (delta: 169.9 MB). Free memory was 257.9 MB in the beginning and 264.4 MB in the end (delta: -6.5 MB). Peak memory consumption was 271.7 MB. Max. memory is 3.6 GB. [2018-06-22 14:35:14,366 INFO ]: TraceAbstraction took 43831.56 ms. Allocated memory was 610.8 MB in the beginning and 1.5 GB in the end (delta: 862.5 MB). Free memory was 264.4 MB in the beginning and 356.8 MB in the end (delta: -92.3 MB). Peak memory consumption was 1.1 GB. Max. memory is 3.6 GB. [2018-06-22 14:35:14,368 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 309.3 MB. Free memory is still 273.8 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 116.76 ms. Allocated memory is still 440.9 MB. Free memory was 275.8 MB in the beginning and 271.3 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 151.21 ms. Allocated memory is still 440.9 MB. Free memory was 271.3 MB in the beginning and 257.9 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 3.6 GB. * RCFGBuilder took 2970.77 ms. Allocated memory was 440.9 MB in the beginning and 610.8 MB in the end (delta: 169.9 MB). Free memory was 257.9 MB in the beginning and 264.4 MB in the end (delta: -6.5 MB). Peak memory consumption was 271.7 MB. Max. memory is 3.6 GB. * TraceAbstraction took 43831.56 ms. Allocated memory was 610.8 MB in the beginning and 1.5 GB in the end (delta: 862.5 MB). Free memory was 264.4 MB in the beginning and 356.8 MB in the end (delta: -92.3 MB). Peak memory consumption was 1.1 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 XnfDer was eliminating 160 quantified variables from 11 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 43.7s OverallTime, 4 OverallIterations, 5 TraceHistogramMax, 2.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 25 SDslu, 88 SDs, 0 SdLazy, 60 SolverSat, 34 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.1s 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: 0.3s SsaConstructionTime, 2.4s SatisfiabilityAnalysisTime, 15.8s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 5536 SizeOfPredicates, 2479 NumberOfNonLiveVariables, 3843 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 9/26 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.8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-35-14-377.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/token_ring.8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-35-14-377.csv Completed graceful shutdown