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/lustre/swimmingpool_8.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 20:00:20,321 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 20:00:20,323 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 20:00:20,334 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 20:00:20,334 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 20:00:20,335 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 20:00:20,338 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 20:00:20,339 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 20:00:20,341 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 20:00:20,342 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 20:00:20,343 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 20:00:20,343 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 20:00:20,344 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 20:00:20,345 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 20:00:20,346 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 20:00:20,346 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 20:00:20,350 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 20:00:20,352 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 20:00:20,365 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 20:00:20,366 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 20:00:20,368 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 20:00:20,370 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 20:00:20,370 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 20:00:20,370 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 20:00:20,371 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 20:00:20,372 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 20:00:20,373 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 20:00:20,373 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 20:00:20,380 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 20:00:20,381 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 20:00:20,381 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 20:00:20,382 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 20:00:20,382 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 20:00:20,383 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 20:00:20,383 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 20:00:20,384 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 20:00:20,410 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 20:00:20,410 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 20:00:20,411 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 20:00:20,411 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 20:00:20,412 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 20:00:20,412 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 20:00:20,412 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 20:00:20,413 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 20:00:20,413 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 20:00:20,413 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 20:00:20,413 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 20:00:20,413 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 20:00:20,414 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 20:00:20,415 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 20:00:20,416 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 20:00:20,416 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 20:00:20,471 INFO ]: Repository-Root is: /tmp [2018-06-22 20:00:20,489 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 20:00:20,494 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 20:00:20,496 INFO ]: Initializing SmtParser... [2018-06-22 20:00:20,496 INFO ]: SmtParser initialized [2018-06-22 20:00:20,497 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 [2018-06-22 20:00:20,499 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 20:00:20,596 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 unknown [2018-06-22 20:00:21,151 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 [2018-06-22 20:00:21,156 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 20:00:21,170 INFO ]: Walking toolchain with 4 elements. [2018-06-22 20:00:21,171 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 20:00:21,171 INFO ]: Initializing ChcToBoogie... [2018-06-22 20:00:21,171 INFO ]: ChcToBoogie initialized [2018-06-22 20:00:21,174 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,247 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21 Unit [2018-06-22 20:00:21,247 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 20:00:21,248 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 20:00:21,248 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 20:00:21,248 INFO ]: Boogie Preprocessor initialized [2018-06-22 20:00:21,281 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,281 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,291 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,291 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,300 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,301 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,304 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (1/1) ... [2018-06-22 20:00:21,312 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 20:00:21,313 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 20:00:21,313 INFO ]: Initializing RCFGBuilder... [2018-06-22 20:00:21,313 INFO ]: RCFGBuilder initialized [2018-06-22 20:00:21,314 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (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 20:00:21,347 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 20:00:21,347 INFO ]: Found specification of procedure False [2018-06-22 20:00:21,347 INFO ]: Found implementation of procedure False [2018-06-22 20:00:21,347 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 20:00:21,347 INFO ]: Found specification of procedure state [2018-06-22 20:00:21,347 INFO ]: Found implementation of procedure state [2018-06-22 20:00:21,347 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 20:00:21,347 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 20:00:21,347 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 20:00:21,846 INFO ]: Using library mode [2018-06-22 20:00:21,846 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:00:21 BoogieIcfgContainer [2018-06-22 20:00:21,846 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 20:00:21,848 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 20:00:21,848 INFO ]: Initializing TraceAbstraction... [2018-06-22 20:00:21,852 INFO ]: TraceAbstraction initialized [2018-06-22 20:00:21,853 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 08:00:21" (1/3) ... [2018-06-22 20:00:21,854 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47320644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 08:00:21, skipping insertion in model container [2018-06-22 20:00:21,854 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 08:00:21" (2/3) ... [2018-06-22 20:00:21,854 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47320644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 08:00:21, skipping insertion in model container [2018-06-22 20:00:21,854 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 08:00:21" (3/3) ... [2018-06-22 20:00:21,856 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 20:00:21,866 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 20:00:21,877 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 20:00:21,928 INFO ]: Using default assertion order modulation [2018-06-22 20:00:21,928 INFO ]: Interprodecural is true [2018-06-22 20:00:21,928 INFO ]: Hoare is false [2018-06-22 20:00:21,928 INFO ]: Compute interpolants for FPandBP [2018-06-22 20:00:21,928 INFO ]: Backedges is TWOTRACK [2018-06-22 20:00:21,928 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 20:00:21,929 INFO ]: Difference is false [2018-06-22 20:00:21,929 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 20:00:21,929 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 20:00:21,946 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 20:00:21,959 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 20:00:21,959 INFO ]: Found error trace [2018-06-22 20:00:21,960 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:00:21,960 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:00:21,967 INFO ]: Analyzing trace with hash -597537630, now seen corresponding path program 1 times [2018-06-22 20:00:21,969 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:00:21,969 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:00:22,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:22,019 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:00:22,019 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:22,161 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:22,401 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 20:00:22,403 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 20:00:22,403 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 20:00:22,405 INFO ]: Interpolant automaton has 4 states [2018-06-22 20:00:22,450 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 20:00:22,451 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 20:00:22,453 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 20:00:22,597 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:00:22,597 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 20:00:22,598 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 20:00:22,599 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 20:00:22,599 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:00:22,611 INFO ]: With dead ends: 13 [2018-06-22 20:00:22,612 INFO ]: Without dead ends: 13 [2018-06-22 20:00:22,614 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 20:00:22,628 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 20:00:22,656 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 20:00:22,657 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 20:00:22,657 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 20:00:22,658 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 20:00:22,659 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:00:22,659 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 20:00:22,659 INFO ]: Interpolant automaton has 4 states. [2018-06-22 20:00:22,659 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 20:00:22,660 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 20:00:22,660 INFO ]: Found error trace [2018-06-22 20:00:22,660 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:00:22,660 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:00:22,660 INFO ]: Analyzing trace with hash 1530833734, now seen corresponding path program 1 times [2018-06-22 20:00:22,660 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:00:22,660 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:00:22,661 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:22,661 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:00:22,661 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:22,733 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:23,332 WARN ]: Spent 385.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 30 [2018-06-22 20:00:23,390 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:00:23,390 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:00:23,417 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 20:00:23,424 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:00:23,592 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:23,607 INFO ]: Computing forward predicates... [2018-06-22 20:00:23,848 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 20:00:24,919 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 20:00:24,954 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:00:24,954 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 20:00:24,955 INFO ]: Interpolant automaton has 8 states [2018-06-22 20:00:24,955 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 20:00:24,955 INFO ]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 20:00:24,955 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-06-22 20:00:25,386 WARN ]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-22 20:00:25,668 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:00:25,668 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 20:00:25,668 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 20:00:25,668 INFO ]: Start accepts. Automaton has 8 states. Word has length 13 [2018-06-22 20:00:25,668 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:00:25,669 INFO ]: With dead ends: 15 [2018-06-22 20:00:25,669 INFO ]: Without dead ends: 15 [2018-06-22 20:00:25,670 INFO ]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2018-06-22 20:00:25,670 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 20:00:25,672 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 20:00:25,672 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 20:00:25,673 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 20:00:25,673 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 20:00:25,673 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:00:25,673 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 20:00:25,673 INFO ]: Interpolant automaton has 8 states. [2018-06-22 20:00:25,673 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 20:00:25,674 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 20:00:25,674 INFO ]: Found error trace [2018-06-22 20:00:25,674 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:00:25,674 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:00:25,674 INFO ]: Analyzing trace with hash -1486246934, now seen corresponding path program 2 times [2018-06-22 20:00:25,674 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:00:25,674 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:00:25,675 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:25,675 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 20:00:25,675 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:25,792 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:26,164 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:00:26,164 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:00:26,164 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 20:00:26,172 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 20:00:26,324 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 20:00:26,324 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:26,332 INFO ]: Computing forward predicates... [2018-06-22 20:00:26,507 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 20:00:27,527 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 20:00:27,548 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 20:00:27,548 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-22 20:00:27,549 INFO ]: Interpolant automaton has 12 states [2018-06-22 20:00:27,549 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 20:00:27,549 INFO ]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-06-22 20:00:27,550 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 12 states. [2018-06-22 20:00:27,769 WARN ]: Spent 183.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2018-06-22 20:00:27,996 WARN ]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2018-06-22 20:00:28,129 WARN ]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2018-06-22 20:00:28,220 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 20:00:28,220 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 20:00:28,222 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 20:00:28,222 INFO ]: Start accepts. Automaton has 12 states. Word has length 17 [2018-06-22 20:00:28,222 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 20:00:28,223 INFO ]: With dead ends: 17 [2018-06-22 20:00:28,223 INFO ]: Without dead ends: 17 [2018-06-22 20:00:28,223 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2018-06-22 20:00:28,223 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 20:00:28,226 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 20:00:28,226 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 20:00:28,227 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 20:00:28,227 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 20:00:28,227 INFO ]: Finished accepts. word is rejected. [2018-06-22 20:00:28,227 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 20:00:28,227 INFO ]: Interpolant automaton has 12 states. [2018-06-22 20:00:28,227 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 20:00:28,228 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 20:00:28,228 INFO ]: Found error trace [2018-06-22 20:00:28,228 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 20:00:28,228 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 20:00:28,228 INFO ]: Analyzing trace with hash -2056434034, now seen corresponding path program 3 times [2018-06-22 20:00:28,228 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 20:00:28,228 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 20:00:28,229 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:28,229 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 20:00:28,229 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 20:00:28,344 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:29,072 WARN ]: Spent 399.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 12 [2018-06-22 20:00:29,432 WARN ]: Spent 291.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2018-06-22 20:00:29,561 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 61 [2018-06-22 20:00:29,732 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 20:00:29,732 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 20:00:29,732 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 20:00:29,745 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 20:00:29,956 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 20:00:29,956 INFO ]: Conjunction of SSA is unsat [2018-06-22 20:00:29,966 INFO ]: Computing forward predicates... [2018-06-22 20:00:30,242 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,243 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 20:00:30,537 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,572 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,575 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,578 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 20:00:30,594 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,596 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,695 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,697 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,704 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,711 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,716 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,729 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,730 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 20:00:30,767 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:30,768 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 20:00:31,158 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 20:00:31,158 WARN ]: expecting exponential blowup for input size 13 [2018-06-22 20:00:34,435 WARN ]: Simplifying disjunction of 256608 conjuctions. This might take some time... Received shutdown request... [2018-06-22 20:01:35,935 INFO ]: Timeout while computing interpolants [2018-06-22 20:01:36,135 WARN ]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 20:01:36,136 WARN ]: Verification canceled [2018-06-22 20:01:36,143 WARN ]: Timeout [2018-06-22 20:01:36,144 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 08:01:36 BoogieIcfgContainer [2018-06-22 20:01:36,144 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 20:01:36,145 INFO ]: Toolchain (without parser) took 74988.36 ms. Allocated memory was 304.1 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 237.5 MB in the beginning and 484.4 MB in the end (delta: -246.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 20:01:36,146 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 20:01:36,147 INFO ]: ChcToBoogie took 76.88 ms. Allocated memory is still 304.1 MB. Free memory was 237.5 MB in the beginning and 234.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:01:36,147 INFO ]: Boogie Preprocessor took 64.37 ms. Allocated memory is still 304.1 MB. Free memory was 234.5 MB in the beginning and 232.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 20:01:36,148 INFO ]: RCFGBuilder took 533.46 ms. Allocated memory is still 304.1 MB. Free memory was 232.5 MB in the beginning and 201.4 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. [2018-06-22 20:01:36,148 INFO ]: TraceAbstraction took 74296.13 ms. Allocated memory was 304.1 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 201.4 MB in the beginning and 484.4 MB in the end (delta: -283.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 3.6 GB. [2018-06-22 20:01:36,153 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 304.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 76.88 ms. Allocated memory is still 304.1 MB. Free memory was 237.5 MB in the beginning and 234.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 64.37 ms. Allocated memory is still 304.1 MB. Free memory was 234.5 MB in the beginning and 232.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 533.46 ms. Allocated memory is still 304.1 MB. Free memory was 232.5 MB in the beginning and 201.4 MB in the end (delta: 31.1 MB). Peak memory consumption was 31.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 74296.13 ms. Allocated memory was 304.1 MB in the beginning and 1.7 GB in the end (delta: 1.4 GB). Free memory was 201.4 MB in the beginning and 484.4 MB in the end (delta: -283.0 MB). Peak memory consumption was 1.4 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 22 with TraceHistMax 4, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 256608 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 74.2s OverallTime, 4 OverallIterations, 4 TraceHistogramMax, 1.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 33 SDtfs, 21 SDslu, 104 SDs, 0 SdLazy, 79 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred 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: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 64 ConstructedInterpolants, 0 QuantifiedInterpolants, 5260 SizeOfPredicates, 46 NumberOfNonLiveVariables, 1736 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 8/26 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/swimmingpool_8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_20-01-36-171.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/swimmingpool_8.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_20-01-36-171.csv Completed graceful shutdown