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/ctigar/nested8.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 05:37:39,668 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 05:37:39,670 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 05:37:39,682 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 05:37:39,683 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 05:37:39,683 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 05:37:39,686 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 05:37:39,688 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 05:37:39,690 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 05:37:39,692 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 05:37:39,695 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 05:37:39,695 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 05:37:39,696 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 05:37:39,697 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 05:37:39,698 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 05:37:39,698 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 05:37:39,700 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 05:37:39,702 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 05:37:39,704 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 05:37:39,705 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 05:37:39,706 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 05:37:39,709 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 05:37:39,709 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 05:37:39,709 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 05:37:39,710 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 05:37:39,711 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 05:37:39,712 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 05:37:39,712 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 05:37:39,714 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 05:37:39,714 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 05:37:39,714 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 05:37:39,715 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 05:37:39,715 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 05:37:39,716 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 05:37:39,717 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 05:37:39,717 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-22 05:37:39,734 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 05:37:39,734 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 05:37:39,734 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 05:37:39,734 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 05:37:39,735 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 05:37:39,736 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 05:37:39,736 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 05:37:39,736 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 05:37:39,736 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 05:37:39,737 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 05:37:39,737 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 05:37:39,737 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 05:37:39,737 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 05:37:39,738 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 05:37:39,738 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 05:37:39,738 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 05:37:39,738 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 05:37:39,740 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 05:37:39,740 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 05:37:39,780 INFO ]: Repository-Root is: /tmp [2018-06-22 05:37:39,797 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 05:37:39,800 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 05:37:39,801 INFO ]: Initializing SmtParser... [2018-06-22 05:37:39,802 INFO ]: SmtParser initialized [2018-06-22 05:37:39,802 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested8.c.smt2 [2018-06-22 05:37:39,803 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 05:37:39,895 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested8.c.smt2 unknown [2018-06-22 05:37:40,152 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/nested8.c.smt2 [2018-06-22 05:37:40,157 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 05:37:40,161 INFO ]: Walking toolchain with 4 elements. [2018-06-22 05:37:40,162 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 05:37:40,162 INFO ]: Initializing ChcToBoogie... [2018-06-22 05:37:40,162 INFO ]: ChcToBoogie initialized [2018-06-22 05:37:40,165 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,230 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40 Unit [2018-06-22 05:37:40,230 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 05:37:40,231 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 05:37:40,231 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 05:37:40,231 INFO ]: Boogie Preprocessor initialized [2018-06-22 05:37:40,246 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,246 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,252 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,252 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,256 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,257 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,259 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (1/1) ... [2018-06-22 05:37:40,260 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 05:37:40,261 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 05:37:40,261 INFO ]: Initializing RCFGBuilder... [2018-06-22 05:37:40,261 INFO ]: RCFGBuilder initialized [2018-06-22 05:37:40,262 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (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 05:37:40,274 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-22 05:37:40,274 INFO ]: Found specification of procedure gotoProc [2018-06-22 05:37:40,274 INFO ]: Found implementation of procedure gotoProc [2018-06-22 05:37:40,274 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 05:37:40,274 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 05:37:40,274 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 05:37:40,457 INFO ]: Using library mode [2018-06-22 05:37:40,457 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:37:40 BoogieIcfgContainer [2018-06-22 05:37:40,457 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 05:37:40,459 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 05:37:40,459 INFO ]: Initializing TraceAbstraction... [2018-06-22 05:37:40,474 INFO ]: TraceAbstraction initialized [2018-06-22 05:37:40,474 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 05:37:40" (1/3) ... [2018-06-22 05:37:40,475 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7d5c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 05:37:40, skipping insertion in model container [2018-06-22 05:37:40,475 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 05:37:40" (2/3) ... [2018-06-22 05:37:40,476 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7d5c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 05:37:40, skipping insertion in model container [2018-06-22 05:37:40,476 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 05:37:40" (3/3) ... [2018-06-22 05:37:40,477 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 05:37:40,492 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 05:37:40,506 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 05:37:40,556 INFO ]: Using default assertion order modulation [2018-06-22 05:37:40,557 INFO ]: Interprodecural is true [2018-06-22 05:37:40,557 INFO ]: Hoare is false [2018-06-22 05:37:40,557 INFO ]: Compute interpolants for FPandBP [2018-06-22 05:37:40,557 INFO ]: Backedges is TWOTRACK [2018-06-22 05:37:40,557 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 05:37:40,557 INFO ]: Difference is false [2018-06-22 05:37:40,557 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 05:37:40,557 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 05:37:40,571 INFO ]: Start isEmpty. Operand 10 states. [2018-06-22 05:37:40,583 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-22 05:37:40,583 INFO ]: Found error trace [2018-06-22 05:37:40,584 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:40,584 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:40,590 INFO ]: Analyzing trace with hash 1285054476, now seen corresponding path program 1 times [2018-06-22 05:37:40,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:40,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:40,624 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,624 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:40,624 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,662 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:40,741 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:40,743 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 05:37:40,743 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-22 05:37:40,744 INFO ]: Interpolant automaton has 3 states [2018-06-22 05:37:40,755 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-22 05:37:40,755 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-22 05:37:40,759 INFO ]: Start difference. First operand 10 states. Second operand 3 states. [2018-06-22 05:37:40,818 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:40,818 INFO ]: Finished difference Result 9 states and 9 transitions. [2018-06-22 05:37:40,819 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-22 05:37:40,820 INFO ]: Start accepts. Automaton has 3 states. Word has length 7 [2018-06-22 05:37:40,820 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:40,829 INFO ]: With dead ends: 9 [2018-06-22 05:37:40,829 INFO ]: Without dead ends: 9 [2018-06-22 05:37:40,830 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 05:37:40,843 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-22 05:37:40,857 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-06-22 05:37:40,858 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-22 05:37:40,858 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-06-22 05:37:40,859 INFO ]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-06-22 05:37:40,859 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:40,859 INFO ]: Abstraction has 9 states and 9 transitions. [2018-06-22 05:37:40,859 INFO ]: Interpolant automaton has 3 states. [2018-06-22 05:37:40,859 INFO ]: Start isEmpty. Operand 9 states and 9 transitions. [2018-06-22 05:37:40,860 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-22 05:37:40,860 INFO ]: Found error trace [2018-06-22 05:37:40,860 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:40,860 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:40,860 INFO ]: Analyzing trace with hash 1180100628, now seen corresponding path program 1 times [2018-06-22 05:37:40,860 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:40,860 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:40,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,861 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:40,861 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:40,906 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:41,090 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:41,090 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:41,090 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 05:37:41,099 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:41,152 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:41,163 INFO ]: Computing forward predicates... [2018-06-22 05:37:42,696 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:42,729 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:42,730 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-22 05:37:42,731 INFO ]: Interpolant automaton has 5 states [2018-06-22 05:37:42,731 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-22 05:37:42,731 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-22 05:37:42,731 INFO ]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-06-22 05:37:42,879 WARN ]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2018-06-22 05:37:42,977 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:42,977 INFO ]: Finished difference Result 10 states and 10 transitions. [2018-06-22 05:37:42,978 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-22 05:37:42,978 INFO ]: Start accepts. Automaton has 5 states. Word has length 8 [2018-06-22 05:37:42,978 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:42,978 INFO ]: With dead ends: 10 [2018-06-22 05:37:42,978 INFO ]: Without dead ends: 10 [2018-06-22 05:37:42,979 INFO ]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:37:42,979 INFO ]: Start minimizeSevpa. Operand 10 states. [2018-06-22 05:37:42,980 INFO ]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-06-22 05:37:42,980 INFO ]: Start removeUnreachable. Operand 10 states. [2018-06-22 05:37:42,981 INFO ]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-06-22 05:37:42,981 INFO ]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-06-22 05:37:42,981 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:42,981 INFO ]: Abstraction has 10 states and 10 transitions. [2018-06-22 05:37:42,981 INFO ]: Interpolant automaton has 5 states. [2018-06-22 05:37:42,981 INFO ]: Start isEmpty. Operand 10 states and 10 transitions. [2018-06-22 05:37:42,981 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 05:37:42,981 INFO ]: Found error trace [2018-06-22 05:37:42,981 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:42,981 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:42,981 INFO ]: Analyzing trace with hash -2073468660, now seen corresponding path program 2 times [2018-06-22 05:37:42,982 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:42,982 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:42,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:42,984 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:37:42,984 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:43,054 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:43,612 WARN ]: Spent 336.00 ms on a formula simplification. DAG size of input: 11 DAG size of output: 7 [2018-06-22 05:37:43,790 WARN ]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 05:37:43,791 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:43,791 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:43,791 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 05:37:43,799 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 05:37:43,855 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 05:37:43,855 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:43,858 INFO ]: Computing forward predicates... [2018-06-22 05:37:45,852 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:45,872 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:45,872 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-22 05:37:45,872 INFO ]: Interpolant automaton has 6 states [2018-06-22 05:37:45,872 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 05:37:45,872 INFO ]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-06-22 05:37:45,872 INFO ]: Start difference. First operand 10 states and 10 transitions. Second operand 6 states. [2018-06-22 05:37:45,994 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:45,994 INFO ]: Finished difference Result 11 states and 11 transitions. [2018-06-22 05:37:45,994 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 05:37:45,994 INFO ]: Start accepts. Automaton has 6 states. Word has length 9 [2018-06-22 05:37:45,994 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:45,994 INFO ]: With dead ends: 11 [2018-06-22 05:37:45,994 INFO ]: Without dead ends: 11 [2018-06-22 05:37:45,995 INFO ]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:37:45,995 INFO ]: Start minimizeSevpa. Operand 11 states. [2018-06-22 05:37:45,996 INFO ]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-06-22 05:37:45,996 INFO ]: Start removeUnreachable. Operand 11 states. [2018-06-22 05:37:45,996 INFO ]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-06-22 05:37:45,996 INFO ]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-06-22 05:37:45,996 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:45,996 INFO ]: Abstraction has 11 states and 11 transitions. [2018-06-22 05:37:45,996 INFO ]: Interpolant automaton has 6 states. [2018-06-22 05:37:45,996 INFO ]: Start isEmpty. Operand 11 states and 11 transitions. [2018-06-22 05:37:45,997 INFO ]: Finished isEmpty. Found accepting run of length 11 [2018-06-22 05:37:45,997 INFO ]: Found error trace [2018-06-22 05:37:45,997 INFO ]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:45,997 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:45,997 INFO ]: Analyzing trace with hash 145098516, now seen corresponding path program 3 times [2018-06-22 05:37:45,997 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:45,997 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:45,998 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:45,998 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:45,998 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:46,039 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:46,300 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:46,300 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:46,300 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 05:37:46,306 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 05:37:46,336 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 05:37:46,336 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:46,339 INFO ]: Computing forward predicates... [2018-06-22 05:37:53,023 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:53,062 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:53,062 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-06-22 05:37:53,062 INFO ]: Interpolant automaton has 8 states [2018-06-22 05:37:53,062 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 05:37:53,062 INFO ]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2018-06-22 05:37:53,062 INFO ]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2018-06-22 05:37:53,238 WARN ]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2018-06-22 05:37:53,415 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:53,416 INFO ]: Finished difference Result 12 states and 12 transitions. [2018-06-22 05:37:53,416 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 05:37:53,416 INFO ]: Start accepts. Automaton has 8 states. Word has length 10 [2018-06-22 05:37:53,416 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:53,416 INFO ]: With dead ends: 12 [2018-06-22 05:37:53,416 INFO ]: Without dead ends: 12 [2018-06-22 05:37:53,417 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:37:53,417 INFO ]: Start minimizeSevpa. Operand 12 states. [2018-06-22 05:37:53,418 INFO ]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-06-22 05:37:53,418 INFO ]: Start removeUnreachable. Operand 12 states. [2018-06-22 05:37:53,418 INFO ]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-06-22 05:37:53,418 INFO ]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-06-22 05:37:53,419 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:53,419 INFO ]: Abstraction has 12 states and 12 transitions. [2018-06-22 05:37:53,419 INFO ]: Interpolant automaton has 8 states. [2018-06-22 05:37:53,419 INFO ]: Start isEmpty. Operand 12 states and 12 transitions. [2018-06-22 05:37:53,419 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-22 05:37:53,419 INFO ]: Found error trace [2018-06-22 05:37:53,419 INFO ]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:53,419 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:53,419 INFO ]: Analyzing trace with hash 201204236, now seen corresponding path program 4 times [2018-06-22 05:37:53,419 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:53,419 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:53,420 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:53,420 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:53,420 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:53,466 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:53,681 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:53,681 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:53,681 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:37:53,688 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 05:37:53,735 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 05:37:53,736 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:53,739 INFO ]: Computing forward predicates... [2018-06-22 05:37:55,895 WARN ]: Spent 229.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 12 [2018-06-22 05:37:58,796 INFO ]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:58,816 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:37:58,896 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2018-06-22 05:37:58,896 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:37:58,896 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:37:58,896 INFO ]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:37:58,896 INFO ]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2018-06-22 05:37:59,036 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:37:59,036 INFO ]: Finished difference Result 13 states and 13 transitions. [2018-06-22 05:37:59,036 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 05:37:59,036 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-22 05:37:59,036 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:37:59,037 INFO ]: With dead ends: 13 [2018-06-22 05:37:59,037 INFO ]: Without dead ends: 13 [2018-06-22 05:37:59,037 INFO ]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2018-06-22 05:37:59,037 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 05:37:59,038 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 05:37:59,038 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 05:37:59,039 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-06-22 05:37:59,039 INFO ]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-06-22 05:37:59,039 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:37:59,039 INFO ]: Abstraction has 13 states and 13 transitions. [2018-06-22 05:37:59,039 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:37:59,039 INFO ]: Start isEmpty. Operand 13 states and 13 transitions. [2018-06-22 05:37:59,039 INFO ]: Finished isEmpty. Found accepting run of length 13 [2018-06-22 05:37:59,039 INFO ]: Found error trace [2018-06-22 05:37:59,039 INFO ]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:37:59,040 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:37:59,040 INFO ]: Analyzing trace with hash 1940481556, now seen corresponding path program 5 times [2018-06-22 05:37:59,040 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:37:59,040 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:37:59,040 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:59,041 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:37:59,041 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:37:59,096 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:59,279 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:37:59,279 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:37:59,279 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:37:59,294 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 05:37:59,387 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-06-22 05:37:59,387 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:37:59,391 INFO ]: Computing forward predicates... [2018-06-22 05:38:25,606 INFO ]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:25,625 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:25,652 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2018-06-22 05:38:25,652 INFO ]: Interpolant automaton has 9 states [2018-06-22 05:38:25,652 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-22 05:38:25,652 INFO ]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2018-06-22 05:38:25,653 INFO ]: Start difference. First operand 13 states and 13 transitions. Second operand 9 states. [2018-06-22 05:38:25,820 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:25,820 INFO ]: Finished difference Result 14 states and 14 transitions. [2018-06-22 05:38:25,820 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 05:38:25,820 INFO ]: Start accepts. Automaton has 9 states. Word has length 12 [2018-06-22 05:38:25,820 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:25,820 INFO ]: With dead ends: 14 [2018-06-22 05:38:25,820 INFO ]: Without dead ends: 14 [2018-06-22 05:38:25,821 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2018-06-22 05:38:25,821 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-22 05:38:25,822 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-06-22 05:38:25,822 INFO ]: Start removeUnreachable. Operand 14 states. [2018-06-22 05:38:25,822 INFO ]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-06-22 05:38:25,822 INFO ]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-06-22 05:38:25,822 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:25,822 INFO ]: Abstraction has 14 states and 14 transitions. [2018-06-22 05:38:25,822 INFO ]: Interpolant automaton has 9 states. [2018-06-22 05:38:25,822 INFO ]: Start isEmpty. Operand 14 states and 14 transitions. [2018-06-22 05:38:25,823 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 05:38:25,823 INFO ]: Found error trace [2018-06-22 05:38:25,823 INFO ]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:25,823 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:25,823 INFO ]: Analyzing trace with hash 23503628, now seen corresponding path program 6 times [2018-06-22 05:38:25,823 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:25,823 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:25,823 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:25,823 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:38:25,823 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:25,905 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:26,782 WARN ]: Spent 669.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 14 [2018-06-22 05:38:26,921 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:26,921 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:26,921 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:38:26,926 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 05:38:26,972 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 05:38:26,972 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:26,975 INFO ]: Computing forward predicates... [2018-06-22 05:38:30,499 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 10 [2018-06-22 05:38:30,690 WARN ]: expecting exponential blowup for input size 7 [2018-06-22 05:38:32,660 WARN ]: expecting exponential blowup for input size 8 [2018-06-22 05:38:32,782 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:38:32,785 WARN ]: expecting exponential blowup for input size 6 [2018-06-22 05:38:34,656 INFO ]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:34,831 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 05:38:34,831 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-06-22 05:38:34,831 INFO ]: Interpolant automaton has 12 states [2018-06-22 05:38:34,831 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-22 05:38:34,831 INFO ]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2018-06-22 05:38:34,831 INFO ]: Start difference. First operand 14 states and 14 transitions. Second operand 12 states. [2018-06-22 05:38:35,046 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 05:38:35,046 INFO ]: Finished difference Result 15 states and 15 transitions. [2018-06-22 05:38:35,046 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 05:38:35,046 INFO ]: Start accepts. Automaton has 12 states. Word has length 13 [2018-06-22 05:38:35,046 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 05:38:35,047 INFO ]: With dead ends: 15 [2018-06-22 05:38:35,047 INFO ]: Without dead ends: 15 [2018-06-22 05:38:35,047 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2018-06-22 05:38:35,047 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 05:38:35,049 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 05:38:35,049 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 05:38:35,049 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-06-22 05:38:35,049 INFO ]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-06-22 05:38:35,049 INFO ]: Finished accepts. word is rejected. [2018-06-22 05:38:35,049 INFO ]: Abstraction has 15 states and 15 transitions. [2018-06-22 05:38:35,049 INFO ]: Interpolant automaton has 12 states. [2018-06-22 05:38:35,049 INFO ]: Start isEmpty. Operand 15 states and 15 transitions. [2018-06-22 05:38:35,049 INFO ]: Finished isEmpty. Found accepting run of length 15 [2018-06-22 05:38:35,049 INFO ]: Found error trace [2018-06-22 05:38:35,049 INFO ]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 05:38:35,049 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 05:38:35,050 INFO ]: Analyzing trace with hash 726730004, now seen corresponding path program 7 times [2018-06-22 05:38:35,050 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 05:38:35,050 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 05:38:35,051 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:35,051 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 05:38:35,051 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 05:38:35,092 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:35,418 INFO ]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 05:38:35,419 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 05:38:35,419 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:38:35,662 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 05:38:35,711 INFO ]: Conjunction of SSA is unsat [2018-06-22 05:38:35,715 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-22 05:38:44,232 INFO ]: Timeout while computing interpolants [2018-06-22 05:38:44,432 WARN ]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 05:38:44,432 WARN ]: Verification canceled [2018-06-22 05:38:44,518 WARN ]: Timeout [2018-06-22 05:38:44,518 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 05:38:44 BoogieIcfgContainer [2018-06-22 05:38:44,518 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 05:38:44,519 INFO ]: Toolchain (without parser) took 64361.74 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 262.2 MB in the beginning and 712.8 MB in the end (delta: -450.6 MB). Peak memory consumption was 752.1 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,520 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 05:38:44,520 INFO ]: ChcToBoogie took 68.36 ms. Allocated memory is still 309.9 MB. Free memory was 262.2 MB in the beginning and 259.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,520 INFO ]: Boogie Preprocessor took 29.55 ms. Allocated memory is still 309.9 MB. Free memory was 259.3 MB in the beginning and 258.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,521 INFO ]: RCFGBuilder took 196.59 ms. Allocated memory is still 309.9 MB. Free memory was 258.3 MB in the beginning and 248.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,521 INFO ]: TraceAbstraction took 64059.08 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.1 MB in the beginning and 712.8 MB in the end (delta: -465.7 MB). Peak memory consumption was 737.0 MB. Max. memory is 3.6 GB. [2018-06-22 05:38:44,531 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 309.9 MB. Free memory is still 275.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 68.36 ms. Allocated memory is still 309.9 MB. Free memory was 262.2 MB in the beginning and 259.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 29.55 ms. Allocated memory is still 309.9 MB. Free memory was 259.3 MB in the beginning and 258.3 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 196.59 ms. Allocated memory is still 309.9 MB. Free memory was 258.3 MB in the beginning and 248.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 3.6 GB. * TraceAbstraction took 64059.08 ms. Allocated memory was 309.9 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 247.1 MB in the beginning and 712.8 MB in the end (delta: -465.7 MB). Peak memory consumption was 737.0 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 15 with TraceHistMax 7, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 20 quantified variables from 11 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 10 locations, 1 error locations. TIMEOUT Result, 63.9s OverallTime, 8 OverallIterations, 7 TraceHistogramMax, 1.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 49 SDtfs, 19 SDslu, 126 SDs, 0 SdLazy, 54 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 17 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=7, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 51.8s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 5351 SizeOfPredicates, 30 NumberOfNonLiveVariables, 1125 ConjunctsInSsa, 216 ConjunctsInUnsatCore, 13 InterpolantComputations, 1 PerfectInterpolantSequences, 0/112 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/nested8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_05-38-44-552.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/nested8.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_05-38-44-552.csv Completed graceful shutdown