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/lustre/metros_4_e3_1025.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 09:22:44,555 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 09:22:44,557 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 09:22:44,570 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 09:22:44,570 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 09:22:44,573 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 09:22:44,574 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 09:22:44,576 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 09:22:44,578 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 09:22:44,578 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 09:22:44,580 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 09:22:44,580 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 09:22:44,581 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 09:22:44,582 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 09:22:44,585 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 09:22:44,586 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 09:22:44,587 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 09:22:44,597 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 09:22:44,598 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 09:22:44,599 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 09:22:44,600 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 09:22:44,605 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 09:22:44,605 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 09:22:44,605 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 09:22:44,606 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 09:22:44,607 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 09:22:44,607 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 09:22:44,609 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 09:22:44,610 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 09:22:44,610 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 09:22:44,610 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 09:22:44,611 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 09:22:44,611 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 09:22:44,616 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 09:22:44,617 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 09:22:44,617 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 09:22:44,631 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 09:22:44,632 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 09:22:44,632 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 09:22:44,632 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 09:22:44,633 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 09:22:44,633 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 09:22:44,633 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 09:22:44,634 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 09:22:44,634 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:22:44,634 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 09:22:44,634 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 09:22:44,634 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 09:22:44,635 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 09:22:44,635 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 09:22:44,635 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 09:22:44,635 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 09:22:44,635 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 09:22:44,636 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 09:22:44,637 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 09:22:44,678 INFO ]: Repository-Root is: /tmp [2018-06-22 09:22:44,695 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 09:22:44,698 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 09:22:44,699 INFO ]: Initializing SmtParser... [2018-06-22 09:22:44,700 INFO ]: SmtParser initialized [2018-06-22 09:22:44,701 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1025.smt2 [2018-06-22 09:22:44,702 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 09:22:44,790 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1025.smt2 unknown [2018-06-22 09:22:45,254 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/metros_4_e3_1025.smt2 [2018-06-22 09:22:45,259 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 09:22:45,275 INFO ]: Walking toolchain with 4 elements. [2018-06-22 09:22:45,276 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 09:22:45,276 INFO ]: Initializing ChcToBoogie... [2018-06-22 09:22:45,276 INFO ]: ChcToBoogie initialized [2018-06-22 09:22:45,279 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,394 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45 Unit [2018-06-22 09:22:45,394 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 09:22:45,395 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 09:22:45,395 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 09:22:45,395 INFO ]: Boogie Preprocessor initialized [2018-06-22 09:22:45,415 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,415 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,427 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,427 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,440 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,451 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,453 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... [2018-06-22 09:22:45,456 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 09:22:45,456 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 09:22:45,456 INFO ]: Initializing RCFGBuilder... [2018-06-22 09:22:45,456 INFO ]: RCFGBuilder initialized [2018-06-22 09:22:45,457 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 09:22:45,472 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 09:22:45,472 INFO ]: Found specification of procedure gotoProc [2018-06-22 09:22:45,472 INFO ]: Found implementation of procedure gotoProc [2018-06-22 09:22:45,472 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 09:22:45,472 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 09:22:45,472 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 09:22:45,923 INFO ]: Using library mode [2018-06-22 09:22:45,925 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:22:45 BoogieIcfgContainer [2018-06-22 09:22:45,925 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 09:22:45,927 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 09:22:45,927 INFO ]: Initializing TraceAbstraction... [2018-06-22 09:22:45,932 INFO ]: TraceAbstraction initialized [2018-06-22 09:22:45,932 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 09:22:45" (1/3) ... [2018-06-22 09:22:45,933 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cfd988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 09:22:45, skipping insertion in model container [2018-06-22 09:22:45,933 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 09:22:45" (2/3) ... [2018-06-22 09:22:45,933 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48cfd988 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 09:22:45, skipping insertion in model container [2018-06-22 09:22:45,934 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 09:22:45" (3/3) ... [2018-06-22 09:22:45,936 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 09:22:45,944 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 09:22:45,953 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 09:22:46,005 INFO ]: Using default assertion order modulation [2018-06-22 09:22:46,006 INFO ]: Interprodecural is true [2018-06-22 09:22:46,006 INFO ]: Hoare is false [2018-06-22 09:22:46,006 INFO ]: Compute interpolants for FPandBP [2018-06-22 09:22:46,006 INFO ]: Backedges is TWOTRACK [2018-06-22 09:22:46,006 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 09:22:46,006 INFO ]: Difference is false [2018-06-22 09:22:46,006 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 09:22:46,006 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 09:22:46,022 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 09:22:46,034 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 09:22:46,034 INFO ]: Found error trace [2018-06-22 09:22:46,035 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:22:46,035 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:22:46,041 INFO ]: Analyzing trace with hash 1284994894, now seen corresponding path program 1 times [2018-06-22 09:22:46,043 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:22:46,043 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:22:46,091 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:46,091 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:22:46,091 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:46,196 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:46,341 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:46,345 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 09:22:46,345 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 09:22:46,347 INFO ]: Interpolant automaton has 3 states [2018-06-22 09:22:46,357 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 09:22:46,358 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 09:22:46,359 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 09:22:46,440 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:22:46,441 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 09:22:46,441 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 09:22:46,442 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 09:22:46,442 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:22:46,451 INFO ]: With dead ends: 9 [2018-06-22 09:22:46,451 INFO ]: Without dead ends: 9 [2018-06-22 09:22:46,453 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 09:22:46,467 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 09:22:46,480 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 09:22:46,482 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 09:22:46,482 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 09:22:46,483 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 09:22:46,483 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:22:46,483 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 09:22:46,483 INFO ]: Interpolant automaton has 3 states. [2018-06-22 09:22:46,483 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 09:22:46,484 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 09:22:46,484 INFO ]: Found error trace [2018-06-22 09:22:46,484 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:22:46,484 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:22:46,484 INFO ]: Analyzing trace with hash 1180964567, now seen corresponding path program 1 times [2018-06-22 09:22:46,484 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:22:46,484 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:22:46,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:46,485 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:22:46,485 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:46,608 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:46,794 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:46,794 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:22:46,794 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 09:22:46,801 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:22:46,968 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:46,979 INFO ]: Computing forward predicates... [2018-06-22 09:22:47,263 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:47,298 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:22:47,298 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-06-22 09:22:47,299 INFO ]: Interpolant automaton has 6 states [2018-06-22 09:22:47,299 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 09:22:47,299 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:22:47,299 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2018-06-22 09:22:47,476 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:22:47,476 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 09:22:47,477 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 09:22:47,477 INFO ]: Start accepts. Automaton has 6 states. Word has length 8 [2018-06-22 09:22:47,477 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:22:47,477 INFO ]: With dead ends: 11 [2018-06-22 09:22:47,477 INFO ]: Without dead ends: 11 [2018-06-22 09:22:47,478 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 09:22:47,478 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 09:22:47,479 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 09:22:47,479 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 09:22:47,480 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 09:22:47,480 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-06-22 09:22:47,480 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:22:47,480 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 09:22:47,480 INFO ]: Interpolant automaton has 6 states. [2018-06-22 09:22:47,480 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 09:22:47,480 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 09:22:47,480 INFO ]: Found error trace [2018-06-22 09:22:47,480 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:22:47,480 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:22:47,482 INFO ]: Analyzing trace with hash 1062095287, now seen corresponding path program 2 times [2018-06-22 09:22:47,483 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:22:47,483 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:22:47,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:47,483 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 09:22:47,483 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:47,681 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:48,165 WARN ]: Spent 235.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 12 [2018-06-22 09:22:48,302 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2018-06-22 09:22:48,384 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:48,384 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:22:48,384 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 09:22:48,390 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 09:22:48,563 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 09:22:48,563 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:48,572 INFO ]: Computing forward predicates... [2018-06-22 09:22:49,092 WARN ]: Spent 119.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 5 [2018-06-22 09:22:49,180 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:49,199 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:22:49,199 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2018-06-22 09:22:49,200 INFO ]: Interpolant automaton has 10 states [2018-06-22 09:22:49,200 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 09:22:49,200 INFO ]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2018-06-22 09:22:49,200 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-06-22 09:22:49,598 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:22:49,598 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 09:22:49,599 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 09:22:49,599 INFO ]: Start accepts. Automaton has 10 states. Word has length 10 [2018-06-22 09:22:49,599 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:22:49,599 INFO ]: With dead ends: 13 [2018-06-22 09:22:49,599 INFO ]: Without dead ends: 13 [2018-06-22 09:22:49,600 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-06-22 09:22:49,600 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 09:22:49,601 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 09:22:49,601 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 09:22:49,602 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 09:22:49,602 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-06-22 09:22:49,602 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:22:49,602 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 09:22:49,602 INFO ]: Interpolant automaton has 10 states. [2018-06-22 09:22:49,602 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 09:22:49,602 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 09:22:49,602 INFO ]: Found error trace [2018-06-22 09:22:49,602 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:22:49,602 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:22:49,602 INFO ]: Analyzing trace with hash -1502133097, now seen corresponding path program 3 times [2018-06-22 09:22:49,602 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:22:49,602 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:22:49,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:49,603 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:22:49,603 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:49,884 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:51,780 WARN ]: Spent 923.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 12 [2018-06-22 09:22:52,732 WARN ]: Spent 849.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 12 [2018-06-22 09:22:53,268 WARN ]: Spent 491.00 ms on a formula simplification. DAG size of input: 272 DAG size of output: 12 [2018-06-22 09:22:53,501 WARN ]: Spent 205.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 12 [2018-06-22 09:22:53,509 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:53,509 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 09:22:53,509 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 09:22:53,518 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 09:22:53,760 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 09:22:53,760 INFO ]: Conjunction of SSA is unsat [2018-06-22 09:22:53,773 INFO ]: Computing forward predicates... [2018-06-22 09:22:54,001 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 09:22:54,022 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 09:22:54,023 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-06-22 09:22:54,023 INFO ]: Interpolant automaton has 14 states [2018-06-22 09:22:54,023 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-22 09:22:54,023 INFO ]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2018-06-22 09:22:54,023 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 14 states. [2018-06-22 09:22:54,164 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 09:22:54,164 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 09:22:54,164 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 09:22:54,164 INFO ]: Start accepts. Automaton has 14 states. Word has length 12 [2018-06-22 09:22:54,165 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 09:22:54,165 INFO ]: With dead ends: 15 [2018-06-22 09:22:54,165 INFO ]: Without dead ends: 15 [2018-06-22 09:22:54,165 INFO ]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2018-06-22 09:22:54,165 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 09:22:54,167 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 09:22:54,167 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 09:22:54,167 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 09:22:54,167 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-06-22 09:22:54,168 INFO ]: Finished accepts. word is rejected. [2018-06-22 09:22:54,168 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 09:22:54,168 INFO ]: Interpolant automaton has 14 states. [2018-06-22 09:22:54,168 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 09:22:54,168 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 09:22:54,168 INFO ]: Found error trace [2018-06-22 09:22:54,168 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 09:22:54,168 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 09:22:54,168 INFO ]: Analyzing trace with hash -414382217, now seen corresponding path program 4 times [2018-06-22 09:22:54,168 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 09:22:54,168 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 09:22:54,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:54,169 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 09:22:54,169 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 09:22:55,519 INFO ]: Conjunction of SSA is unsat Received shutdown request... [2018-06-22 09:24:00,177 FATAL]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.access$1(Interpolator.java:263) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:132) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:122) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:113) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:220) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:201) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:919) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.managedscript.ManagedScript.getInterpolants(ManagedScript.java:199) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:282) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:210) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:228) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:220) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:410) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:425) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:367) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:309) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:151) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:119) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:324) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.runToolchainDefault(DefaultToolchainJob.java:221) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.BasicToolchainJob.run(BasicToolchainJob.java:134) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-06-22 09:24:00,181 INFO ]: Toolchain (without parser) took 74922.24 ms. Allocated memory was 308.8 MB in the beginning and 611.8 MB in the end (delta: 303.0 MB). Free memory was 250.2 MB in the beginning and 443.9 MB in the end (delta: -193.7 MB). Peak memory consumption was 325.5 MB. Max. memory is 3.6 GB. [2018-06-22 09:24:00,182 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 09:24:00,183 INFO ]: ChcToBoogie took 118.69 ms. Allocated memory is still 308.8 MB. Free memory was 250.2 MB in the beginning and 247.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:24:00,183 INFO ]: Boogie Preprocessor took 61.23 ms. Allocated memory is still 308.8 MB. Free memory was 247.2 MB in the beginning and 246.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:24:00,183 INFO ]: RCFGBuilder took 469.00 ms. Allocated memory is still 308.8 MB. Free memory was 246.2 MB in the beginning and 214.1 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. [2018-06-22 09:24:00,184 INFO ]: TraceAbstraction took 74254.13 ms. Allocated memory was 308.8 MB in the beginning and 611.8 MB in the end (delta: 303.0 MB). Free memory was 214.1 MB in the beginning and 443.9 MB in the end (delta: -229.8 MB). Peak memory consumption was 289.5 MB. Max. memory is 3.6 GB. [2018-06-22 09:24:00,190 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 274.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 118.69 ms. Allocated memory is still 308.8 MB. Free memory was 250.2 MB in the beginning and 247.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 61.23 ms. Allocated memory is still 308.8 MB. Free memory was 247.2 MB in the beginning and 246.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 469.00 ms. Allocated memory is still 308.8 MB. Free memory was 246.2 MB in the beginning and 214.1 MB in the end (delta: 32.0 MB). Peak memory consumption was 32.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 74254.13 ms. Allocated memory was 308.8 MB in the beginning and 611.8 MB in the end (delta: 303.0 MB). Free memory was 214.1 MB in the beginning and 443.9 MB in the end (delta: -229.8 MB). Peak memory consumption was 289.5 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkLeafNode(Interpolator.java:265) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/metros_4_e3_1025.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_09-24-00-202.csv Completed graceful shutdown