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/ctigar/dillig01.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 14:53:29,683 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 14:53:29,685 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 14:53:29,696 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 14:53:29,696 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 14:53:29,697 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 14:53:29,698 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 14:53:29,700 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 14:53:29,702 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 14:53:29,703 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 14:53:29,703 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 14:53:29,704 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 14:53:29,704 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 14:53:29,706 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 14:53:29,706 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 14:53:29,707 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 14:53:29,709 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 14:53:29,711 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 14:53:29,712 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 14:53:29,713 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 14:53:29,714 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 14:53:29,717 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 14:53:29,717 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 14:53:29,718 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 14:53:29,718 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 14:53:29,719 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 14:53:29,727 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 14:53:29,728 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 14:53:29,729 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 14:53:29,730 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 14:53:29,730 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 14:53:29,731 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 14:53:29,731 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 14:53:29,732 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 14:53:29,733 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 14:53:29,733 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 14:53:29,757 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 14:53:29,758 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 14:53:29,758 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 14:53:29,758 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 14:53:29,759 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 14:53:29,759 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 14:53:29,760 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 14:53:29,760 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 14:53:29,760 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 14:53:29,760 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 14:53:29,761 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:53:29,761 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 14:53:29,761 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 14:53:29,761 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 14:53:29,761 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 14:53:29,762 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 14:53:29,762 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 14:53:29,762 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 14:53:29,762 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 14:53:29,763 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 14:53:29,764 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 14:53:29,808 INFO ]: Repository-Root is: /tmp [2018-06-22 14:53:29,823 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 14:53:29,827 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 14:53:29,829 INFO ]: Initializing SmtParser... [2018-06-22 14:53:29,829 INFO ]: SmtParser initialized [2018-06-22 14:53:29,830 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 [2018-06-22 14:53:29,831 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 14:53:29,921 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 unknown [2018-06-22 14:53:30,132 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/dillig01.c.smt2 [2018-06-22 14:53:30,136 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 14:53:30,147 INFO ]: Walking toolchain with 4 elements. [2018-06-22 14:53:30,148 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 14:53:30,148 INFO ]: Initializing ChcToBoogie... [2018-06-22 14:53:30,148 INFO ]: ChcToBoogie initialized [2018-06-22 14:53:30,151 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,195 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30 Unit [2018-06-22 14:53:30,195 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 14:53:30,195 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 14:53:30,196 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 14:53:30,196 INFO ]: Boogie Preprocessor initialized [2018-06-22 14:53:30,218 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,218 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,225 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,226 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,228 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,230 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,231 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... [2018-06-22 14:53:30,241 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 14:53:30,241 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 14:53:30,241 INFO ]: Initializing RCFGBuilder... [2018-06-22 14:53:30,241 INFO ]: RCFGBuilder initialized [2018-06-22 14:53:30,242 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 14:53:30,260 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 14:53:30,260 INFO ]: Found specification of procedure False [2018-06-22 14:53:30,260 INFO ]: Found implementation of procedure False [2018-06-22 14:53:30,260 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 14:53:30,260 INFO ]: Found specification of procedure state [2018-06-22 14:53:30,261 INFO ]: Found implementation of procedure state [2018-06-22 14:53:30,261 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 14:53:30,261 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 14:53:30,261 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 14:53:30,443 INFO ]: Using library mode [2018-06-22 14:53:30,443 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:53:30 BoogieIcfgContainer [2018-06-22 14:53:30,443 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 14:53:30,444 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 14:53:30,444 INFO ]: Initializing TraceAbstraction... [2018-06-22 14:53:30,447 INFO ]: TraceAbstraction initialized [2018-06-22 14:53:30,448 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 02:53:30" (1/3) ... [2018-06-22 14:53:30,448 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75754baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 02:53:30, skipping insertion in model container [2018-06-22 14:53:30,448 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 02:53:30" (2/3) ... [2018-06-22 14:53:30,449 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75754baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 02:53:30, skipping insertion in model container [2018-06-22 14:53:30,449 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 02:53:30" (3/3) ... [2018-06-22 14:53:30,450 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 14:53:30,459 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 14:53:30,467 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 14:53:30,505 INFO ]: Using default assertion order modulation [2018-06-22 14:53:30,505 INFO ]: Interprodecural is true [2018-06-22 14:53:30,505 INFO ]: Hoare is false [2018-06-22 14:53:30,505 INFO ]: Compute interpolants for FPandBP [2018-06-22 14:53:30,505 INFO ]: Backedges is TWOTRACK [2018-06-22 14:53:30,505 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 14:53:30,505 INFO ]: Difference is false [2018-06-22 14:53:30,505 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 14:53:30,505 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 14:53:30,519 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 14:53:30,529 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 14:53:30,531 INFO ]: Found error trace [2018-06-22 14:53:30,531 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:30,532 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:30,537 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 14:53:30,539 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:30,540 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:30,572 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:30,572 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:53:30,572 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:30,597 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:30,753 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 14:53:30,755 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 14:53:30,755 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 14:53:30,757 INFO ]: Interpolant automaton has 4 states [2018-06-22 14:53:30,771 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 14:53:30,771 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:53:30,773 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 14:53:30,859 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:30,859 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 14:53:30,859 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 14:53:30,861 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 14:53:30,861 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:30,874 INFO ]: With dead ends: 13 [2018-06-22 14:53:30,874 INFO ]: Without dead ends: 13 [2018-06-22 14:53:30,877 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 14:53:30,890 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 14:53:30,911 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 14:53:30,912 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 14:53:30,913 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 14:53:30,914 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 14:53:30,914 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:30,914 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 14:53:30,914 INFO ]: Interpolant automaton has 4 states. [2018-06-22 14:53:30,914 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 14:53:30,915 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 14:53:30,915 INFO ]: Found error trace [2018-06-22 14:53:30,915 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:30,916 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:30,916 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 14:53:30,916 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:30,916 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:30,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:30,917 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:53:30,917 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:30,952 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:31,107 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:53:31,107 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:31,107 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 14:53:31,115 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:53:31,152 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:31,161 INFO ]: Computing forward predicates... [2018-06-22 14:53:31,363 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 14:53:31,395 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:31,395 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 14:53:31,396 INFO ]: Interpolant automaton has 6 states [2018-06-22 14:53:31,396 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 14:53:31,396 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 14:53:31,396 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 14:53:31,526 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:31,526 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 14:53:31,527 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 14:53:31,527 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 14:53:31,527 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:31,527 INFO ]: With dead ends: 15 [2018-06-22 14:53:31,527 INFO ]: Without dead ends: 15 [2018-06-22 14:53:31,528 INFO ]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 14:53:31,528 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 14:53:31,531 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 14:53:31,531 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 14:53:31,531 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 14:53:31,531 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 14:53:31,532 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:31,532 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 14:53:31,532 INFO ]: Interpolant automaton has 6 states. [2018-06-22 14:53:31,532 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 14:53:31,532 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 14:53:31,532 INFO ]: Found error trace [2018-06-22 14:53:31,532 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:31,533 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:31,533 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 14:53:31,533 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:31,533 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:31,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:31,534 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:53:31,534 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:31,587 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:31,995 WARN ]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2018-06-22 14:53:32,270 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:53:32,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:32,270 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 14:53:32,279 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:53:32,314 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:53:32,314 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:32,317 INFO ]: Computing forward predicates... [2018-06-22 14:53:32,531 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 14:53:32,550 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:32,550 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2018-06-22 14:53:32,550 INFO ]: Interpolant automaton has 11 states [2018-06-22 14:53:32,550 INFO ]: Constructing interpolant automaton starting with 11 interpolants. [2018-06-22 14:53:32,551 INFO ]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2018-06-22 14:53:32,551 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 11 states. [2018-06-22 14:53:32,979 WARN ]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2018-06-22 14:53:33,258 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:33,258 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 14:53:33,260 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 14:53:33,260 INFO ]: Start accepts. Automaton has 11 states. Word has length 17 [2018-06-22 14:53:33,260 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:33,260 INFO ]: With dead ends: 17 [2018-06-22 14:53:33,260 INFO ]: Without dead ends: 17 [2018-06-22 14:53:33,261 INFO ]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2018-06-22 14:53:33,261 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 14:53:33,264 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 14:53:33,264 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 14:53:33,265 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 14:53:33,265 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 14:53:33,265 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:33,265 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 14:53:33,265 INFO ]: Interpolant automaton has 11 states. [2018-06-22 14:53:33,265 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 14:53:33,266 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 14:53:33,266 INFO ]: Found error trace [2018-06-22 14:53:33,266 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:33,266 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:33,266 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 14:53:33,266 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:33,266 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:33,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:33,267 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:33,267 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:33,298 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:33,812 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:53:33,812 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:33,812 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 14:53:33,820 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:53:33,866 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 14:53:33,866 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:33,869 INFO ]: Computing forward predicates... [2018-06-22 14:53:34,588 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 14:53:34,616 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:34,617 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2018-06-22 14:53:34,617 INFO ]: Interpolant automaton has 16 states [2018-06-22 14:53:34,617 INFO ]: Constructing interpolant automaton starting with 16 interpolants. [2018-06-22 14:53:34,617 INFO ]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2018-06-22 14:53:34,617 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 16 states. [2018-06-22 14:53:34,773 WARN ]: Spent 123.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2018-06-22 14:53:34,975 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2018-06-22 14:53:35,097 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2018-06-22 14:53:35,125 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:35,125 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 14:53:35,127 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:53:35,127 INFO ]: Start accepts. Automaton has 16 states. Word has length 21 [2018-06-22 14:53:35,127 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:35,127 INFO ]: With dead ends: 19 [2018-06-22 14:53:35,127 INFO ]: Without dead ends: 19 [2018-06-22 14:53:35,128 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:53:35,128 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 14:53:35,131 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 14:53:35,131 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 14:53:35,132 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 14:53:35,132 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 14:53:35,132 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:35,132 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 14:53:35,132 INFO ]: Interpolant automaton has 16 states. [2018-06-22 14:53:35,132 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 14:53:35,133 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 14:53:35,133 INFO ]: Found error trace [2018-06-22 14:53:35,133 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:35,133 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:35,133 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 14:53:35,133 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:35,133 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:35,134 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:35,134 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:35,134 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:35,193 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:35,562 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:53:35,562 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:35,562 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 14:53:35,568 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 14:53:35,604 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 14:53:35,604 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:35,608 INFO ]: Computing forward predicates... [2018-06-22 14:53:37,887 WARN ]: Spent 1.88 s on a formula simplification. DAG size of input: 352 DAG size of output: 57 [2018-06-22 14:53:39,892 WARN ]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-06-22 14:53:39,916 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 14:53:39,948 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:39,948 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2018-06-22 14:53:39,948 INFO ]: Interpolant automaton has 19 states [2018-06-22 14:53:39,948 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 14:53:39,949 INFO ]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2018-06-22 14:53:39,949 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 19 states. [2018-06-22 14:53:43,071 WARN ]: Spent 2.69 s on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2018-06-22 14:53:43,327 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2018-06-22 14:53:43,693 WARN ]: Spent 348.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-06-22 14:53:43,929 WARN ]: Spent 217.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 32 [2018-06-22 14:53:44,383 WARN ]: Spent 418.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2018-06-22 14:53:44,407 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:44,407 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 14:53:44,411 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 14:53:44,411 INFO ]: Start accepts. Automaton has 19 states. Word has length 25 [2018-06-22 14:53:44,411 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:44,411 INFO ]: With dead ends: 21 [2018-06-22 14:53:44,411 INFO ]: Without dead ends: 21 [2018-06-22 14:53:44,412 INFO ]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2018-06-22 14:53:44,412 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 14:53:44,414 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 14:53:44,414 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 14:53:44,415 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 14:53:44,415 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 14:53:44,415 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:44,415 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 14:53:44,415 INFO ]: Interpolant automaton has 19 states. [2018-06-22 14:53:44,415 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 14:53:44,416 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 14:53:44,416 INFO ]: Found error trace [2018-06-22 14:53:44,416 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:44,416 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:44,416 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 14:53:44,416 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:44,416 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:44,417 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:44,417 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:44,417 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:44,459 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:44,949 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:53:44,949 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:44,949 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 14:53:44,955 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 14:53:45,049 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 14:53:45,050 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:45,054 INFO ]: Computing forward predicates... [2018-06-22 14:53:46,740 WARN ]: Spent 1.38 s on a formula simplification. DAG size of input: 23 DAG size of output: 22 [2018-06-22 14:53:47,123 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 14:53:47,143 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:47,143 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2018-06-22 14:53:47,143 INFO ]: Interpolant automaton has 20 states [2018-06-22 14:53:47,143 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 14:53:47,143 INFO ]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2018-06-22 14:53:47,144 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 20 states. [2018-06-22 14:53:47,347 WARN ]: Spent 166.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2018-06-22 14:53:47,582 WARN ]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2018-06-22 14:53:47,785 WARN ]: Spent 161.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2018-06-22 14:53:48,052 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:48,052 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 14:53:48,058 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 14:53:48,058 INFO ]: Start accepts. Automaton has 20 states. Word has length 29 [2018-06-22 14:53:48,058 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:48,059 INFO ]: With dead ends: 23 [2018-06-22 14:53:48,059 INFO ]: Without dead ends: 23 [2018-06-22 14:53:48,060 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2018-06-22 14:53:48,060 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 14:53:48,063 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 14:53:48,063 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 14:53:48,064 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 14:53:48,064 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 14:53:48,064 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:48,064 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 14:53:48,064 INFO ]: Interpolant automaton has 20 states. [2018-06-22 14:53:48,064 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 14:53:48,065 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 14:53:48,065 INFO ]: Found error trace [2018-06-22 14:53:48,065 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:48,065 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:48,065 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 14:53:48,065 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:48,065 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:48,066 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:48,066 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:48,066 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:48,139 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:48,497 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:53:48,497 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:48,497 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 14:53:48,505 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 14:53:48,577 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 14:53:48,577 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:48,582 INFO ]: Computing forward predicates... [2018-06-22 14:53:50,418 WARN ]: Spent 1.34 s on a formula simplification. DAG size of input: 367 DAG size of output: 19 [2018-06-22 14:53:51,290 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 14:53:51,322 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:53:51,322 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 27 [2018-06-22 14:53:51,322 INFO ]: Interpolant automaton has 27 states [2018-06-22 14:53:51,323 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 14:53:51,323 INFO ]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2018-06-22 14:53:51,323 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 27 states. [2018-06-22 14:53:51,657 WARN ]: Spent 303.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 54 [2018-06-22 14:53:51,829 WARN ]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 31 [2018-06-22 14:53:52,028 WARN ]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2018-06-22 14:53:52,213 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2018-06-22 14:53:52,369 WARN ]: Spent 133.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 28 [2018-06-22 14:53:52,510 WARN ]: Spent 121.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2018-06-22 14:53:52,702 WARN ]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2018-06-22 14:53:53,134 WARN ]: Spent 370.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2018-06-22 14:53:53,159 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:53:53,159 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 14:53:53,160 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 14:53:53,160 INFO ]: Start accepts. Automaton has 27 states. Word has length 33 [2018-06-22 14:53:53,160 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:53:53,161 INFO ]: With dead ends: 27 [2018-06-22 14:53:53,161 INFO ]: Without dead ends: 27 [2018-06-22 14:53:53,161 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=229, Invalid=961, Unknown=0, NotChecked=0, Total=1190 [2018-06-22 14:53:53,161 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 14:53:53,164 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 14:53:53,164 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 14:53:53,165 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 14:53:53,165 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 33 [2018-06-22 14:53:53,166 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:53:53,166 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 14:53:53,166 INFO ]: Interpolant automaton has 27 states. [2018-06-22 14:53:53,166 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 14:53:53,167 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 14:53:53,167 INFO ]: Found error trace [2018-06-22 14:53:53,167 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:53:53,167 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:53:53,167 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 7 times [2018-06-22 14:53:53,167 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:53:53,167 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:53:53,167 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:53,167 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:53:53,167 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:53:53,238 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:53,923 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 14:53:53,923 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:53:53,924 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 14:53:53,930 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:53:53,969 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:53:53,974 INFO ]: Computing forward predicates... [2018-06-22 14:53:55,282 WARN ]: Spent 1.09 s on a formula simplification. DAG size of input: 274 DAG size of output: 24 [2018-06-22 14:53:59,224 WARN ]: Spent 3.32 s on a formula simplification. DAG size of input: 432 DAG size of output: 63 [2018-06-22 14:54:00,519 INFO ]: Checked inductivity of 136 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 14:54:00,538 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:00,538 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 31 [2018-06-22 14:54:00,539 INFO ]: Interpolant automaton has 31 states [2018-06-22 14:54:00,539 INFO ]: Constructing interpolant automaton starting with 31 interpolants. [2018-06-22 14:54:00,539 INFO ]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2018-06-22 14:54:00,539 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 31 states. [2018-06-22 14:54:01,237 WARN ]: Spent 630.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2018-06-22 14:54:01,673 WARN ]: Spent 398.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 55 [2018-06-22 14:54:02,307 WARN ]: Spent 602.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 48 [2018-06-22 14:54:02,627 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 40 [2018-06-22 14:54:03,167 WARN ]: Spent 501.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 25 [2018-06-22 14:54:03,538 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 62 [2018-06-22 14:54:04,130 WARN ]: Spent 557.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 46 [2018-06-22 14:54:04,509 WARN ]: Spent 335.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 64 [2018-06-22 14:54:05,006 WARN ]: Spent 428.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 73 [2018-06-22 14:54:05,039 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:54:05,039 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 14:54:05,039 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 14:54:05,039 INFO ]: Start accepts. Automaton has 31 states. Word has length 41 [2018-06-22 14:54:05,040 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:54:05,040 INFO ]: With dead ends: 29 [2018-06-22 14:54:05,040 INFO ]: Without dead ends: 29 [2018-06-22 14:54:05,041 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 14:54:05,041 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 14:54:05,045 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 14:54:05,045 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 14:54:05,045 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 14:54:05,045 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 14:54:05,046 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:54:05,046 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 14:54:05,046 INFO ]: Interpolant automaton has 31 states. [2018-06-22 14:54:05,046 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 14:54:05,047 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 14:54:05,047 INFO ]: Found error trace [2018-06-22 14:54:05,047 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:05,047 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:05,047 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 8 times [2018-06-22 14:54:05,047 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:05,047 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:05,048 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:05,048 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 14:54:05,048 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:05,129 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:06,112 WARN ]: Spent 718.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 18 [2018-06-22 14:54:06,672 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:54:06,672 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:54:06,672 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:54:06,679 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 14:54:06,719 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 14:54:06,719 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:06,728 INFO ]: Computing forward predicates... [2018-06-22 14:54:09,534 WARN ]: Spent 2.52 s on a formula simplification. DAG size of input: 478 DAG size of output: 91 [2018-06-22 14:54:09,779 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2018-06-22 14:54:10,093 WARN ]: Spent 136.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-06-22 14:54:10,312 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2018-06-22 14:54:10,471 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2018-06-22 14:54:10,623 WARN ]: Spent 112.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2018-06-22 14:54:10,810 WARN ]: Spent 117.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2018-06-22 14:54:15,260 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 14:54:15,279 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:15,279 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2018-06-22 14:54:15,279 INFO ]: Interpolant automaton has 39 states [2018-06-22 14:54:15,279 INFO ]: Constructing interpolant automaton starting with 39 interpolants. [2018-06-22 14:54:15,281 INFO ]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 14:54:15,281 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 39 states. [2018-06-22 14:54:16,134 WARN ]: Spent 788.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 92 [2018-06-22 14:54:16,572 WARN ]: Spent 375.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 28 [2018-06-22 14:54:16,964 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 34 [2018-06-22 14:54:17,510 WARN ]: Spent 475.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 45 [2018-06-22 14:54:18,038 WARN ]: Spent 476.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 39 [2018-06-22 14:54:18,559 WARN ]: Spent 387.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 45 [2018-06-22 14:54:18,928 WARN ]: Spent 305.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 46 [2018-06-22 14:54:19,422 WARN ]: Spent 419.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 47 [2018-06-22 14:54:19,930 WARN ]: Spent 451.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 49 [2018-06-22 14:54:20,325 WARN ]: Spent 340.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 48 [2018-06-22 14:54:20,371 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 14:54:20,371 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 14:54:20,371 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 14:54:20,371 INFO ]: Start accepts. Automaton has 39 states. Word has length 45 [2018-06-22 14:54:20,371 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 14:54:20,372 INFO ]: With dead ends: 31 [2018-06-22 14:54:20,372 INFO ]: Without dead ends: 31 [2018-06-22 14:54:20,373 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2018-06-22 14:54:20,373 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 14:54:20,379 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 14:54:20,379 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 14:54:20,380 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 14:54:20,380 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 14:54:20,380 INFO ]: Finished accepts. word is rejected. [2018-06-22 14:54:20,381 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 14:54:20,381 INFO ]: Interpolant automaton has 39 states. [2018-06-22 14:54:20,381 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 14:54:20,382 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 14:54:20,382 INFO ]: Found error trace [2018-06-22 14:54:20,382 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 14:54:20,382 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 14:54:20,382 INFO ]: Analyzing trace with hash -570306151, now seen corresponding path program 9 times [2018-06-22 14:54:20,382 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 14:54:20,382 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 14:54:20,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:20,382 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 14:54:20,382 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 14:54:20,482 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:20,977 WARN ]: Spent 248.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 14 [2018-06-22 14:54:21,904 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 14:54:21,904 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 14:54:21,904 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 14:54:21,910 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 14:54:21,967 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-06-22 14:54:21,967 INFO ]: Conjunction of SSA is unsat [2018-06-22 14:54:21,982 INFO ]: Computing forward predicates... [2018-06-22 14:54:23,712 WARN ]: Spent 1.48 s on a formula simplification. DAG size of input: 352 DAG size of output: 57 [2018-06-22 14:54:23,879 WARN ]: Spent 110.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2018-06-22 14:54:24,066 WARN ]: Spent 152.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2018-06-22 14:54:24,292 WARN ]: Spent 185.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2018-06-22 14:54:24,443 WARN ]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2018-06-22 14:54:24,629 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2018-06-22 14:54:24,828 WARN ]: Spent 156.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2018-06-22 14:54:26,649 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 14:54:26,668 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 14:54:26,668 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 39 [2018-06-22 14:54:26,669 INFO ]: Interpolant automaton has 39 states [2018-06-22 14:54:26,669 INFO ]: Constructing interpolant automaton starting with 39 interpolants. [2018-06-22 14:54:26,669 INFO ]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2018-06-22 14:54:26,669 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 39 states. [2018-06-22 14:54:28,041 WARN ]: Spent 1.32 s on a formula simplification. DAG size of input: 161 DAG size of output: 129 [2018-06-22 14:54:28,368 WARN ]: Spent 265.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 28 [2018-06-22 14:54:28,761 WARN ]: Spent 347.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 34 [2018-06-22 14:54:29,447 WARN ]: Spent 628.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 72 Received shutdown request... [2018-06-22 14:54:30,034 WARN ]: Removed 10 from assertion stack [2018-06-22 14:54:30,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 14:54:30,035 WARN ]: Verification canceled [2018-06-22 14:54:30,038 WARN ]: Timeout [2018-06-22 14:54:30,038 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 02:54:30 BoogieIcfgContainer [2018-06-22 14:54:30,039 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 14:54:30,039 INFO ]: Toolchain (without parser) took 59902.44 ms. Allocated memory was 308.3 MB in the beginning and 741.9 MB in the end (delta: 433.6 MB). Free memory was 262.8 MB in the beginning and 289.5 MB in the end (delta: -26.7 MB). Peak memory consumption was 406.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:54:30,040 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.9 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 14:54:30,040 INFO ]: ChcToBoogie took 47.04 ms. Allocated memory is still 308.3 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:54:30,041 INFO ]: Boogie Preprocessor took 45.15 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 259.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-22 14:54:30,041 INFO ]: RCFGBuilder took 202.16 ms. Allocated memory is still 308.3 MB. Free memory was 259.8 MB in the beginning and 251.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 14:54:30,042 INFO ]: TraceAbstraction took 59594.12 ms. Allocated memory was 308.3 MB in the beginning and 741.9 MB in the end (delta: 433.6 MB). Free memory was 250.8 MB in the beginning and 289.5 MB in the end (delta: -38.7 MB). Peak memory consumption was 394.9 MB. Max. memory is 3.6 GB. [2018-06-22 14:54:30,044 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.3 MB. Free memory is still 273.9 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 47.04 ms. Allocated memory is still 308.3 MB. Free memory was 262.8 MB in the beginning and 260.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 45.15 ms. Allocated memory is still 308.3 MB. Free memory was 260.8 MB in the beginning and 259.8 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 202.16 ms. Allocated memory is still 308.3 MB. Free memory was 259.8 MB in the beginning and 251.8 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 59594.12 ms. Allocated memory was 308.3 MB in the beginning and 741.9 MB in the end (delta: 433.6 MB). Free memory was 250.8 MB in the beginning and 289.5 MB in the end (delta: -38.7 MB). Peak memory consumption was 394.9 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 constructing difference of abstraction (31states) and interpolant automaton (currently 8 states, 39 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 166. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 59.5s OverallTime, 10 OverallIterations, 11 TraceHistogramMax, 21.6s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 132 SDtfs, 437 SDslu, 937 SDs, 0 SdLazy, 856 SolverSat, 536 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 452 GetRequests, 201 SyntacticMatches, 7 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 45.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=9, 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, 9 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 36.3s InterpolantComputationTime, 555 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 536 ConstructedInterpolants, 0 QuantifiedInterpolants, 5162284 SizeOfPredicates, 572 NumberOfNonLiveVariables, 1728 ConjunctsInSsa, 467 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 385/1440 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/dillig01.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_14-54-30-060.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/dillig01.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_14-54-30-060.csv Completed graceful shutdown