java -Xss4m -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/swimmingpool_8.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-25 17:23:11,626 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-25 17:23:11,630 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-25 17:23:11,658 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-25 17:23:11,658 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-25 17:23:11,659 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-25 17:23:11,660 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-25 17:23:11,670 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-25 17:23:11,672 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-25 17:23:11,681 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-25 17:23:11,682 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-25 17:23:11,682 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-25 17:23:11,683 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-25 17:23:11,688 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-25 17:23:11,689 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-25 17:23:11,690 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-25 17:23:11,706 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-25 17:23:11,708 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-25 17:23:11,715 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-25 17:23:11,716 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-25 17:23:11,717 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-25 17:23:11,720 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-25 17:23:11,720 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-25 17:23:11,720 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-25 17:23:11,721 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-25 17:23:11,725 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-25 17:23:11,726 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-25 17:23:11,727 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-25 17:23:11,733 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-25 17:23:11,733 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-25 17:23:11,734 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-25 17:23:11,735 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-25 17:23:11,735 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-25 17:23:11,739 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-25 17:23:11,740 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-25 17:23:11,740 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-25 17:23:11,755 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-25 17:23:11,755 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-25 17:23:11,755 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-25 17:23:11,756 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-25 17:23:11,757 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-25 17:23:11,757 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-25 17:23:11,757 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-25 17:23:11,757 INFO L133 SettingsManager]: * Use SBE=true [2018-06-25 17:23:11,758 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-25 17:23:11,758 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-25 17:23:11,758 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-25 17:23:11,758 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-25 17:23:11,759 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-25 17:23:11,759 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-25 17:23:11,759 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-25 17:23:11,759 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-25 17:23:11,759 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-25 17:23:11,759 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-25 17:23:11,760 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-25 17:23:11,760 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-25 17:23:11,760 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-25 17:23:11,762 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-25 17:23:11,762 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-25 17:23:11,819 INFO ]: Repository-Root is: /tmp [2018-06-25 17:23:11,846 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-25 17:23:11,849 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-25 17:23:11,851 INFO ]: Initializing SmtParser... [2018-06-25 17:23:11,851 INFO ]: SmtParser initialized [2018-06-25 17:23:11,852 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 [2018-06-25 17:23:11,854 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 [2018-06-25 17:23:11,974 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 unknown [2018-06-25 17:23:12,525 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/lustre/swimmingpool_8.smt2 [2018-06-25 17:23:12,530 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-25 17:23:12,536 INFO ]: Walking toolchain with 4 elements. [2018-06-25 17:23:12,537 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-25 17:23:12,537 INFO ]: Initializing ChcToBoogie... [2018-06-25 17:23:12,537 INFO ]: ChcToBoogie initialized [2018-06-25 17:23:12,541 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,642 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12 Unit [2018-06-25 17:23:12,642 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-25 17:23:12,642 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-25 17:23:12,643 INFO ]: Initializing Boogie Preprocessor... [2018-06-25 17:23:12,643 INFO ]: Boogie Preprocessor initialized [2018-06-25 17:23:12,666 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,666 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,687 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,687 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,704 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,705 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,718 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (1/1) ... [2018-06-25 17:23:12,730 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-25 17:23:12,731 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-25 17:23:12,731 INFO ]: Initializing RCFGBuilder... [2018-06-25 17:23:12,731 INFO ]: RCFGBuilder initialized [2018-06-25 17:23:12,741 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (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) [2018-06-25 17:23:12,760 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-25 17:23:12,760 INFO ]: Found specification of procedure gotoProc [2018-06-25 17:23:12,760 INFO ]: Found implementation of procedure gotoProc [2018-06-25 17:23:12,761 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-25 17:23:12,761 INFO ]: Found specification of procedure Ultimate.START [2018-06-25 17:23:12,761 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 [2018-06-25 17:23:13,402 INFO ]: Using library mode [2018-06-25 17:23:13,403 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 05:23:13 BoogieIcfgContainer [2018-06-25 17:23:13,403 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-25 17:23:13,405 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-25 17:23:13,405 INFO ]: Initializing TraceAbstraction... [2018-06-25 17:23:13,409 INFO ]: TraceAbstraction initialized [2018-06-25 17:23:13,409 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 25.06 05:23:12" (1/3) ... [2018-06-25 17:23:13,410 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ded3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 25.06 05:23:13, skipping insertion in model container [2018-06-25 17:23:13,410 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 25.06 05:23:12" (2/3) ... [2018-06-25 17:23:13,410 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ded3ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.06 05:23:13, skipping insertion in model container [2018-06-25 17:23:13,410 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.06 05:23:13" (3/3) ... [2018-06-25 17:23:13,413 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-25 17:23:13,423 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-25 17:23:13,433 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-25 17:23:13,498 INFO ]: Using default assertion order modulation [2018-06-25 17:23:13,498 INFO ]: Interprodecural is true [2018-06-25 17:23:13,498 INFO ]: Hoare is false [2018-06-25 17:23:13,498 INFO ]: Compute interpolants for FPandBP [2018-06-25 17:23:13,498 INFO ]: Backedges is TWOTRACK [2018-06-25 17:23:13,498 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-25 17:23:13,499 INFO ]: Difference is false [2018-06-25 17:23:13,499 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-25 17:23:13,499 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-25 17:23:13,517 INFO ]: Start isEmpty. Operand 10 states. [2018-06-25 17:23:13,536 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-25 17:23:13,536 INFO ]: Found error trace [2018-06-25 17:23:13,537 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:23:13,538 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:23:13,544 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-25 17:23:13,546 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:23:13,547 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:23:13,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:13,627 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:23:13,627 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:13,810 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:23:14,000 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:23:14,003 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-25 17:23:14,003 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-25 17:23:14,006 INFO ]: Interpolant automaton has 3 states [2018-06-25 17:23:14,023 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-25 17:23:14,023 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-25 17:23:14,026 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-25 17:23:14,139 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 17:23:14,140 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-25 17:23:14,141 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-25 17:23:14,142 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-25 17:23:14,142 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 17:23:14,154 INFO ]: With dead ends: 9 [2018-06-25 17:23:14,154 INFO ]: Without dead ends: 9 [2018-06-25 17:23:14,157 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 [2018-06-25 17:23:14,177 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-25 17:23:14,210 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-25 17:23:14,212 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-25 17:23:14,212 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-25 17:23:14,214 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-25 17:23:14,214 INFO ]: Finished accepts. word is rejected. [2018-06-25 17:23:14,214 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-25 17:23:14,214 INFO ]: Interpolant automaton has 3 states. [2018-06-25 17:23:14,214 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-25 17:23:14,214 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-25 17:23:14,214 INFO ]: Found error trace [2018-06-25 17:23:14,214 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:23:14,215 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:23:14,215 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-25 17:23:14,215 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:23:14,215 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:23:14,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:14,216 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:23:14,216 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:14,375 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:23:14,728 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:23:14,728 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 17:23:14,728 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 [2018-06-25 17:23:14,741 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:23:14,964 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:23:14,984 INFO ]: Computing forward predicates... [2018-06-25 17:23:15,285 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 17:23:15,297 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 17:23:15,310 WARN ]: expecting exponential blowup for input size 6 [2018-06-25 17:23:16,235 WARN ]: Spent 137.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 6 [2018-06-25 17:23:16,254 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:23:16,299 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-25 17:23:16,299 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-25 17:23:16,300 INFO ]: Interpolant automaton has 5 states [2018-06-25 17:23:16,300 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-25 17:23:16,300 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-25 17:23:16,300 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-25 17:23:16,588 WARN ]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2018-06-25 17:23:16,698 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-25 17:23:16,698 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-25 17:23:16,700 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-25 17:23:16,700 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-25 17:23:16,700 INFO ]: Finished accepts. some prefix is accepted. [2018-06-25 17:23:16,700 INFO ]: With dead ends: 10 [2018-06-25 17:23:16,700 INFO ]: Without dead ends: 10 [2018-06-25 17:23:16,701 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-25 17:23:16,701 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-25 17:23:16,702 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-25 17:23:16,702 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-25 17:23:16,703 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-25 17:23:16,703 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-25 17:23:16,703 INFO ]: Finished accepts. word is rejected. [2018-06-25 17:23:16,703 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-25 17:23:16,703 INFO ]: Interpolant automaton has 5 states. [2018-06-25 17:23:16,703 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-25 17:23:16,703 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-25 17:23:16,703 INFO ]: Found error trace [2018-06-25 17:23:16,703 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-25 17:23:16,703 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-25 17:23:16,703 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-25 17:23:16,704 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-25 17:23:16,704 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-25 17:23:16,713 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:16,714 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-25 17:23:16,714 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-25 17:23:16,828 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:23:17,039 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-25 17:23:17,039 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-25 17:23:17,039 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 [2018-06-25 17:23:17,049 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-25 17:23:17,307 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-25 17:23:17,307 INFO ]: Conjunction of SSA is unsat [2018-06-25 17:23:17,319 INFO ]: Computing forward predicates... [2018-06-25 17:23:17,425 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 17:23:17,428 WARN ]: expecting exponential blowup for input size 10 [2018-06-25 17:23:17,640 WARN ]: Simplifying disjunction of 19008 conjuctions. This might take some time... [2018-06-25 17:24:29,567 INFO ]: Simplified to disjunction of 19008 conjuctions. [2018-06-25 17:24:29,702 WARN ]: expecting exponential blowup for input size 7 [2018-06-25 17:24:29,704 WARN ]: expecting exponential blowup for input size 11 [2018-06-25 17:24:30,162 WARN ]: Simplifying disjunction of 28512 conjuctions. This might take some time... Received shutdown request... [2018-06-25 17:24:31,792 INFO ]: Timeout while computing interpolants [2018-06-25 17:24:31,992 WARN ]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-25 17:24:31,992 WARN ]: Verification canceled [2018-06-25 17:24:31,999 WARN ]: Timeout [2018-06-25 17:24:32,000 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.06 05:24:31 BoogieIcfgContainer [2018-06-25 17:24:32,000 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-25 17:24:32,001 INFO ]: Toolchain (without parser) took 79470.92 ms. Allocated memory was 310.4 MB in the beginning and 965.2 MB in the end (delta: 654.8 MB). Free memory was 243.9 MB in the beginning and 867.4 MB in the end (delta: -623.5 MB). Peak memory consumption was 764.2 MB. Max. memory is 3.6 GB. [2018-06-25 17:24:32,002 INFO ]: SmtParser took 0.11 ms. Allocated memory is still 310.4 MB. Free memory is still 276.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-25 17:24:32,002 INFO ]: ChcToBoogie took 104.97 ms. Allocated memory is still 310.4 MB. Free memory was 243.9 MB in the beginning and 241.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-25 17:24:32,003 INFO ]: Boogie Preprocessor took 87.59 ms. Allocated memory is still 310.4 MB. Free memory was 241.0 MB in the beginning and 238.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. [2018-06-25 17:24:32,003 INFO ]: RCFGBuilder took 672.11 ms. Allocated memory is still 310.4 MB. Free memory was 238.9 MB in the beginning and 197.4 MB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 3.6 GB. [2018-06-25 17:24:32,003 INFO ]: TraceAbstraction took 78594.89 ms. Allocated memory was 310.4 MB in the beginning and 965.2 MB in the end (delta: 654.8 MB). Free memory was 197.4 MB in the beginning and 867.4 MB in the end (delta: -670.0 MB). Peak memory consumption was 717.7 MB. Max. memory is 3.6 GB. [2018-06-25 17:24:32,025 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.11 ms. Allocated memory is still 310.4 MB. Free memory is still 276.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 104.97 ms. Allocated memory is still 310.4 MB. Free memory was 243.9 MB in the beginning and 241.0 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 87.59 ms. Allocated memory is still 310.4 MB. Free memory was 241.0 MB in the beginning and 238.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 3.6 GB. * RCFGBuilder took 672.11 ms. Allocated memory is still 310.4 MB. Free memory was 238.9 MB in the beginning and 197.4 MB in the end (delta: 41.5 MB). Peak memory consumption was 41.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 78594.89 ms. Allocated memory was 310.4 MB in the beginning and 965.2 MB in the end (delta: 654.8 MB). Free memory was 197.4 MB in the beginning and 867.4 MB in the end (delta: -670.0 MB). Peak memory consumption was 717.7 MB. 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 10 with TraceHistMax 2, while TraceCheckSpWp was constructing forward predicates, while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations, while DnfTransformerHelper was XNF transformer was simplifying 28512 conjuctions. . - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 78.5s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.5s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 20 SDs, 0 SdLazy, 14 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 252 SizeOfPredicates, 2 NumberOfNonLiveVariables, 830 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 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_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-25_17-24-32-059.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/swimmingpool_8.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-25_17-24-32-059.csv Completed graceful shutdown