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/up-nested.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 15:46:49,690 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 15:46:49,692 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 15:46:49,703 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 15:46:49,704 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 15:46:49,705 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 15:46:49,706 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 15:46:49,708 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 15:46:49,709 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 15:46:49,710 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 15:46:49,711 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 15:46:49,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 15:46:49,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 15:46:49,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 15:46:49,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 15:46:49,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 15:46:49,716 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 15:46:49,718 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 15:46:49,719 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 15:46:49,720 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 15:46:49,722 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 15:46:49,724 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 15:46:49,724 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 15:46:49,725 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 15:46:49,726 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 15:46:49,727 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 15:46:49,727 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 15:46:49,728 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 15:46:49,729 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 15:46:49,730 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 15:46:49,730 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 15:46:49,731 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 15:46:49,731 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 15:46:49,732 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 15:46:49,733 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 15:46:49,733 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 15:46:49,746 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 15:46:49,747 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 15:46:49,747 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 15:46:49,748 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 15:46:49,749 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 15:46:49,749 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 15:46:49,749 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 15:46:49,750 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 15:46:49,750 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 15:46:49,750 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 15:46:49,751 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:46:49,751 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 15:46:49,751 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 15:46:49,751 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 15:46:49,752 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 15:46:49,752 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 15:46:49,752 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 15:46:49,752 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 15:46:49,752 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 15:46:49,754 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 15:46:49,754 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 15:46:49,800 INFO ]: Repository-Root is: /tmp [2018-06-22 15:46:49,813 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 15:46:49,818 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 15:46:49,819 INFO ]: Initializing SmtParser... [2018-06-22 15:46:49,819 INFO ]: SmtParser initialized [2018-06-22 15:46:49,820 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-22 15:46:49,821 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 15:46:49,921 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 unknown [2018-06-22 15:46:50,187 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/up-nested.c.smt2 [2018-06-22 15:46:50,191 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 15:46:50,197 INFO ]: Walking toolchain with 4 elements. [2018-06-22 15:46:50,197 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 15:46:50,197 INFO ]: Initializing ChcToBoogie... [2018-06-22 15:46:50,197 INFO ]: ChcToBoogie initialized [2018-06-22 15:46:50,201 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,242 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50 Unit [2018-06-22 15:46:50,242 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 15:46:50,243 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 15:46:50,243 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 15:46:50,243 INFO ]: Boogie Preprocessor initialized [2018-06-22 15:46:50,264 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,264 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,273 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,273 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,277 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,279 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,281 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... [2018-06-22 15:46:50,283 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 15:46:50,296 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 15:46:50,296 INFO ]: Initializing RCFGBuilder... [2018-06-22 15:46:50,296 INFO ]: RCFGBuilder initialized [2018-06-22 15:46:50,297 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 15:46:50,325 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 15:46:50,325 INFO ]: Found specification of procedure False [2018-06-22 15:46:50,325 INFO ]: Found implementation of procedure False [2018-06-22 15:46:50,325 INFO ]: Specification and implementation of procedure state given in one single declaration [2018-06-22 15:46:50,325 INFO ]: Found specification of procedure state [2018-06-22 15:46:50,326 INFO ]: Found implementation of procedure state [2018-06-22 15:46:50,326 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 15:46:50,326 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 15:46:50,326 INFO ]: Found implementation of procedure Ultimate.START [2018-06-22 15:46:50,581 INFO ]: Using library mode [2018-06-22 15:46:50,582 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:46:50 BoogieIcfgContainer [2018-06-22 15:46:50,582 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 15:46:50,584 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 15:46:50,584 INFO ]: Initializing TraceAbstraction... [2018-06-22 15:46:50,587 INFO ]: TraceAbstraction initialized [2018-06-22 15:46:50,587 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 03:46:50" (1/3) ... [2018-06-22 15:46:50,588 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42716777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 03:46:50, skipping insertion in model container [2018-06-22 15:46:50,589 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 03:46:50" (2/3) ... [2018-06-22 15:46:50,589 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42716777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 03:46:50, skipping insertion in model container [2018-06-22 15:46:50,589 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 03:46:50" (3/3) ... [2018-06-22 15:46:50,591 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 15:46:50,600 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 15:46:50,613 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 15:46:50,669 INFO ]: Using default assertion order modulation [2018-06-22 15:46:50,670 INFO ]: Interprodecural is true [2018-06-22 15:46:50,670 INFO ]: Hoare is false [2018-06-22 15:46:50,670 INFO ]: Compute interpolants for FPandBP [2018-06-22 15:46:50,670 INFO ]: Backedges is TWOTRACK [2018-06-22 15:46:50,670 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 15:46:50,670 INFO ]: Difference is false [2018-06-22 15:46:50,670 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 15:46:50,670 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 15:46:50,690 INFO ]: Start isEmpty. Operand 13 states. [2018-06-22 15:46:50,704 INFO ]: Finished isEmpty. Found accepting run of length 10 [2018-06-22 15:46:50,704 INFO ]: Found error trace [2018-06-22 15:46:50,706 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:50,706 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:50,712 INFO ]: Analyzing trace with hash -683425083, now seen corresponding path program 1 times [2018-06-22 15:46:50,714 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:50,715 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:50,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:50,760 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:46:50,760 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:50,790 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:50,899 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 15:46:50,901 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 15:46:50,901 INFO ]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-06-22 15:46:50,902 INFO ]: Interpolant automaton has 4 states [2018-06-22 15:46:50,912 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-22 15:46:50,912 INFO ]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:46:50,914 INFO ]: Start difference. First operand 13 states. Second operand 4 states. [2018-06-22 15:46:50,991 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:50,991 INFO ]: Finished difference Result 13 states and 14 transitions. [2018-06-22 15:46:50,992 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 15:46:50,993 INFO ]: Start accepts. Automaton has 4 states. Word has length 9 [2018-06-22 15:46:50,993 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:51,002 INFO ]: With dead ends: 13 [2018-06-22 15:46:51,002 INFO ]: Without dead ends: 13 [2018-06-22 15:46:51,004 INFO ]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-06-22 15:46:51,018 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-22 15:46:51,047 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-06-22 15:46:51,048 INFO ]: Start removeUnreachable. Operand 13 states. [2018-06-22 15:46:51,049 INFO ]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-06-22 15:46:51,051 INFO ]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2018-06-22 15:46:51,051 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:51,051 INFO ]: Abstraction has 13 states and 14 transitions. [2018-06-22 15:46:51,051 INFO ]: Interpolant automaton has 4 states. [2018-06-22 15:46:51,051 INFO ]: Start isEmpty. Operand 13 states and 14 transitions. [2018-06-22 15:46:51,053 INFO ]: Finished isEmpty. Found accepting run of length 14 [2018-06-22 15:46:51,053 INFO ]: Found error trace [2018-06-22 15:46:51,053 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:51,053 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:51,053 INFO ]: Analyzing trace with hash 204343015, now seen corresponding path program 1 times [2018-06-22 15:46:51,053 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:51,053 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:51,054 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:51,054 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:46:51,054 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:51,083 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:51,273 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:46:51,273 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:51,273 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 15:46:51,284 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:46:51,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:51,331 INFO ]: Computing forward predicates... [2018-06-22 15:46:51,496 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 15:46:51,532 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:46:51,532 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-22 15:46:51,533 INFO ]: Interpolant automaton has 6 states [2018-06-22 15:46:51,533 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-22 15:46:51,533 INFO ]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-06-22 15:46:51,534 INFO ]: Start difference. First operand 13 states and 14 transitions. Second operand 6 states. [2018-06-22 15:46:51,660 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:51,661 INFO ]: Finished difference Result 15 states and 16 transitions. [2018-06-22 15:46:51,662 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-22 15:46:51,662 INFO ]: Start accepts. Automaton has 6 states. Word has length 13 [2018-06-22 15:46:51,662 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:51,662 INFO ]: With dead ends: 15 [2018-06-22 15:46:51,662 INFO ]: Without dead ends: 15 [2018-06-22 15:46:51,663 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 15:46:51,663 INFO ]: Start minimizeSevpa. Operand 15 states. [2018-06-22 15:46:51,666 INFO ]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-06-22 15:46:51,667 INFO ]: Start removeUnreachable. Operand 15 states. [2018-06-22 15:46:51,668 INFO ]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2018-06-22 15:46:51,668 INFO ]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2018-06-22 15:46:51,668 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:51,668 INFO ]: Abstraction has 15 states and 16 transitions. [2018-06-22 15:46:51,668 INFO ]: Interpolant automaton has 6 states. [2018-06-22 15:46:51,668 INFO ]: Start isEmpty. Operand 15 states and 16 transitions. [2018-06-22 15:46:51,669 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-22 15:46:51,669 INFO ]: Found error trace [2018-06-22 15:46:51,669 INFO ]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:51,669 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:51,669 INFO ]: Analyzing trace with hash -1649658231, now seen corresponding path program 2 times [2018-06-22 15:46:51,669 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:51,669 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:51,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:51,670 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:46:51,670 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:51,732 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:51,938 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:46:51,939 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:51,939 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 15:46:51,944 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:46:52,002 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:46:52,002 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:52,005 INFO ]: Computing forward predicates... [2018-06-22 15:46:52,337 INFO ]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-06-22 15:46:52,371 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:46:52,371 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-22 15:46:52,371 INFO ]: Interpolant automaton has 8 states [2018-06-22 15:46:52,371 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 15:46:52,372 INFO ]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-06-22 15:46:52,372 INFO ]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2018-06-22 15:46:52,810 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 15 [2018-06-22 15:46:52,927 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:52,927 INFO ]: Finished difference Result 17 states and 18 transitions. [2018-06-22 15:46:52,929 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 15:46:52,929 INFO ]: Start accepts. Automaton has 8 states. Word has length 17 [2018-06-22 15:46:52,929 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:52,930 INFO ]: With dead ends: 17 [2018-06-22 15:46:52,930 INFO ]: Without dead ends: 17 [2018-06-22 15:46:52,930 INFO ]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:46:52,930 INFO ]: Start minimizeSevpa. Operand 17 states. [2018-06-22 15:46:52,933 INFO ]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-06-22 15:46:52,933 INFO ]: Start removeUnreachable. Operand 17 states. [2018-06-22 15:46:52,933 INFO ]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2018-06-22 15:46:52,933 INFO ]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 17 [2018-06-22 15:46:52,933 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:52,933 INFO ]: Abstraction has 17 states and 18 transitions. [2018-06-22 15:46:52,934 INFO ]: Interpolant automaton has 8 states. [2018-06-22 15:46:52,934 INFO ]: Start isEmpty. Operand 17 states and 18 transitions. [2018-06-22 15:46:52,936 INFO ]: Finished isEmpty. Found accepting run of length 22 [2018-06-22 15:46:52,937 INFO ]: Found error trace [2018-06-22 15:46:52,937 INFO ]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:52,937 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:52,937 INFO ]: Analyzing trace with hash 2119922091, now seen corresponding path program 3 times [2018-06-22 15:46:52,937 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:52,937 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:52,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:52,938 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:46:52,938 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:52,980 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:53,225 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:46:53,225 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:53,225 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 15:46:53,237 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:46:53,271 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 15:46:53,271 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:53,274 INFO ]: Computing forward predicates... [2018-06-22 15:46:53,402 INFO ]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-06-22 15:46:53,428 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:46:53,428 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-06-22 15:46:53,428 INFO ]: Interpolant automaton has 10 states [2018-06-22 15:46:53,429 INFO ]: Constructing interpolant automaton starting with 10 interpolants. [2018-06-22 15:46:53,429 INFO ]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-06-22 15:46:53,429 INFO ]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2018-06-22 15:46:53,768 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:53,768 INFO ]: Finished difference Result 19 states and 20 transitions. [2018-06-22 15:46:53,769 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 15:46:53,769 INFO ]: Start accepts. Automaton has 10 states. Word has length 21 [2018-06-22 15:46:53,769 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:53,770 INFO ]: With dead ends: 19 [2018-06-22 15:46:53,770 INFO ]: Without dead ends: 19 [2018-06-22 15:46:53,770 INFO ]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2018-06-22 15:46:53,770 INFO ]: Start minimizeSevpa. Operand 19 states. [2018-06-22 15:46:53,775 INFO ]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-06-22 15:46:53,775 INFO ]: Start removeUnreachable. Operand 19 states. [2018-06-22 15:46:53,776 INFO ]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2018-06-22 15:46:53,776 INFO ]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 21 [2018-06-22 15:46:53,776 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:53,776 INFO ]: Abstraction has 19 states and 20 transitions. [2018-06-22 15:46:53,776 INFO ]: Interpolant automaton has 10 states. [2018-06-22 15:46:53,776 INFO ]: Start isEmpty. Operand 19 states and 20 transitions. [2018-06-22 15:46:53,777 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 15:46:53,777 INFO ]: Found error trace [2018-06-22 15:46:53,777 INFO ]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:53,777 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:53,777 INFO ]: Analyzing trace with hash 1762711629, now seen corresponding path program 4 times [2018-06-22 15:46:53,777 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:53,778 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:53,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:53,778 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:46:53,778 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:53,805 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:54,063 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:46:54,063 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:54,063 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 15:46:54,074 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:46:54,109 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:46:54,109 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:54,113 INFO ]: Computing forward predicates... [2018-06-22 15:46:54,745 WARN ]: Spent 339.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2018-06-22 15:46:54,891 INFO ]: Checked inductivity of 36 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2018-06-22 15:46:54,911 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:46:54,912 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 15:46:54,912 INFO ]: Interpolant automaton has 15 states [2018-06-22 15:46:54,912 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 15:46:54,912 INFO ]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2018-06-22 15:46:54,912 INFO ]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states. [2018-06-22 15:46:55,514 WARN ]: Spent 181.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 28 [2018-06-22 15:46:55,534 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:55,534 INFO ]: Finished difference Result 21 states and 22 transitions. [2018-06-22 15:46:55,537 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 15:46:55,537 INFO ]: Start accepts. Automaton has 15 states. Word has length 25 [2018-06-22 15:46:55,537 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:55,538 INFO ]: With dead ends: 21 [2018-06-22 15:46:55,538 INFO ]: Without dead ends: 21 [2018-06-22 15:46:55,538 INFO ]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2018-06-22 15:46:55,539 INFO ]: Start minimizeSevpa. Operand 21 states. [2018-06-22 15:46:55,544 INFO ]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-06-22 15:46:55,544 INFO ]: Start removeUnreachable. Operand 21 states. [2018-06-22 15:46:55,545 INFO ]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-06-22 15:46:55,545 INFO ]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 25 [2018-06-22 15:46:55,545 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:55,545 INFO ]: Abstraction has 21 states and 22 transitions. [2018-06-22 15:46:55,545 INFO ]: Interpolant automaton has 15 states. [2018-06-22 15:46:55,545 INFO ]: Start isEmpty. Operand 21 states and 22 transitions. [2018-06-22 15:46:55,548 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 15:46:55,548 INFO ]: Found error trace [2018-06-22 15:46:55,549 INFO ]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:55,549 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:55,549 INFO ]: Analyzing trace with hash 853117551, now seen corresponding path program 5 times [2018-06-22 15:46:55,549 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:55,549 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:55,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:55,550 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:46:55,550 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:55,587 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:56,086 WARN ]: Spent 244.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2018-06-22 15:46:56,408 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:46:56,408 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:56,409 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 15:46:56,416 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 15:46:56,543 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 15:46:56,543 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:56,548 INFO ]: Computing forward predicates... [2018-06-22 15:46:57,322 INFO ]: Checked inductivity of 55 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2018-06-22 15:46:57,342 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:46:57,342 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 15:46:57,342 INFO ]: Interpolant automaton has 25 states [2018-06-22 15:46:57,342 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 15:46:57,343 INFO ]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2018-06-22 15:46:57,343 INFO ]: Start difference. First operand 21 states and 22 transitions. Second operand 25 states. [2018-06-22 15:46:57,678 WARN ]: Spent 306.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2018-06-22 15:46:58,172 WARN ]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 39 [2018-06-22 15:46:58,546 WARN ]: Spent 214.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2018-06-22 15:46:58,579 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:46:58,579 INFO ]: Finished difference Result 23 states and 24 transitions. [2018-06-22 15:46:58,580 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 15:46:58,580 INFO ]: Start accepts. Automaton has 25 states. Word has length 29 [2018-06-22 15:46:58,580 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:46:58,581 INFO ]: With dead ends: 23 [2018-06-22 15:46:58,581 INFO ]: Without dead ends: 23 [2018-06-22 15:46:58,582 INFO ]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2018-06-22 15:46:58,582 INFO ]: Start minimizeSevpa. Operand 23 states. [2018-06-22 15:46:58,585 INFO ]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-06-22 15:46:58,585 INFO ]: Start removeUnreachable. Operand 23 states. [2018-06-22 15:46:58,586 INFO ]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2018-06-22 15:46:58,586 INFO ]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 29 [2018-06-22 15:46:58,586 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:46:58,586 INFO ]: Abstraction has 23 states and 24 transitions. [2018-06-22 15:46:58,586 INFO ]: Interpolant automaton has 25 states. [2018-06-22 15:46:58,586 INFO ]: Start isEmpty. Operand 23 states and 24 transitions. [2018-06-22 15:46:58,587 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 15:46:58,587 INFO ]: Found error trace [2018-06-22 15:46:58,587 INFO ]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:46:58,587 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:46:58,587 INFO ]: Analyzing trace with hash -1661294575, now seen corresponding path program 6 times [2018-06-22 15:46:58,588 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:46:58,588 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:46:58,588 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:58,588 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:46:58,588 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:46:58,624 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:59,001 WARN ]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2018-06-22 15:46:59,186 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 26 [2018-06-22 15:46:59,319 WARN ]: Spent 126.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2018-06-22 15:46:59,679 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:46:59,679 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:46:59,679 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 15:46:59,693 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 15:46:59,736 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 15:46:59,736 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:46:59,741 INFO ]: Computing forward predicates... [2018-06-22 15:47:00,183 WARN ]: Spent 154.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 26 [2018-06-22 15:47:00,526 INFO ]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 15:47:00,557 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:47:00,557 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2018-06-22 15:47:00,557 INFO ]: Interpolant automaton has 29 states [2018-06-22 15:47:00,558 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-22 15:47:00,558 INFO ]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2018-06-22 15:47:00,558 INFO ]: Start difference. First operand 23 states and 24 transitions. Second operand 29 states. [2018-06-22 15:47:01,212 WARN ]: Spent 484.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 71 [2018-06-22 15:47:01,562 WARN ]: Spent 296.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 25 [2018-06-22 15:47:01,713 WARN ]: Spent 115.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 27 [2018-06-22 15:47:01,960 WARN ]: Spent 210.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 43 [2018-06-22 15:47:02,257 WARN ]: Spent 234.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2018-06-22 15:47:02,600 WARN ]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 38 [2018-06-22 15:47:03,005 WARN ]: Spent 353.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 62 [2018-06-22 15:47:03,068 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:47:03,068 INFO ]: Finished difference Result 25 states and 26 transitions. [2018-06-22 15:47:03,070 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 15:47:03,070 INFO ]: Start accepts. Automaton has 29 states. Word has length 33 [2018-06-22 15:47:03,070 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:47:03,071 INFO ]: With dead ends: 25 [2018-06-22 15:47:03,071 INFO ]: Without dead ends: 25 [2018-06-22 15:47:03,071 INFO ]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:47:03,071 INFO ]: Start minimizeSevpa. Operand 25 states. [2018-06-22 15:47:03,074 INFO ]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-06-22 15:47:03,074 INFO ]: Start removeUnreachable. Operand 25 states. [2018-06-22 15:47:03,074 INFO ]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2018-06-22 15:47:03,074 INFO ]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 33 [2018-06-22 15:47:03,074 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:47:03,074 INFO ]: Abstraction has 25 states and 26 transitions. [2018-06-22 15:47:03,074 INFO ]: Interpolant automaton has 29 states. [2018-06-22 15:47:03,074 INFO ]: Start isEmpty. Operand 25 states and 26 transitions. [2018-06-22 15:47:03,076 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 15:47:03,076 INFO ]: Found error trace [2018-06-22 15:47:03,076 INFO ]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:47:03,076 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:47:03,076 INFO ]: Analyzing trace with hash -1494134477, now seen corresponding path program 7 times [2018-06-22 15:47:03,076 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:47:03,076 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:47:03,077 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:03,077 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:47:03,077 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:03,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:03,896 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:47:03,897 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:47:03,897 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 15:47:03,914 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:47:03,962 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:03,968 INFO ]: Computing forward predicates... [2018-06-22 15:47:09,331 WARN ]: Spent 4.47 s on a formula simplification. DAG size of input: 688 DAG size of output: 35 [2018-06-22 15:47:11,251 INFO ]: Checked inductivity of 105 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2018-06-22 15:47:11,708 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:47:11,708 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2018-06-22 15:47:11,708 INFO ]: Interpolant automaton has 33 states [2018-06-22 15:47:11,708 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 15:47:11,709 INFO ]: CoverageRelationStatistics Valid=107, Invalid=949, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 15:47:11,709 INFO ]: Start difference. First operand 25 states and 26 transitions. Second operand 33 states. [2018-06-22 15:47:12,380 WARN ]: Spent 612.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2018-06-22 15:47:12,889 WARN ]: Spent 164.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 30 [2018-06-22 15:47:13,112 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 38 [2018-06-22 15:47:13,383 WARN ]: Spent 237.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 38 [2018-06-22 15:47:13,588 WARN ]: Spent 169.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 29 [2018-06-22 15:47:13,944 WARN ]: Spent 323.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 52 [2018-06-22 15:47:14,241 WARN ]: Spent 260.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 42 [2018-06-22 15:47:14,336 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:47:14,336 INFO ]: Finished difference Result 27 states and 28 transitions. [2018-06-22 15:47:14,337 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-06-22 15:47:14,337 INFO ]: Start accepts. Automaton has 33 states. Word has length 37 [2018-06-22 15:47:14,337 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:47:14,338 INFO ]: With dead ends: 27 [2018-06-22 15:47:14,338 INFO ]: Without dead ends: 27 [2018-06-22 15:47:14,338 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=268, Invalid=1372, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:47:14,339 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-22 15:47:14,343 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-22 15:47:14,343 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-22 15:47:14,344 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2018-06-22 15:47:14,344 INFO ]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 37 [2018-06-22 15:47:14,347 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:47:14,347 INFO ]: Abstraction has 27 states and 28 transitions. [2018-06-22 15:47:14,347 INFO ]: Interpolant automaton has 33 states. [2018-06-22 15:47:14,347 INFO ]: Start isEmpty. Operand 27 states and 28 transitions. [2018-06-22 15:47:14,348 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 15:47:14,348 INFO ]: Found error trace [2018-06-22 15:47:14,348 INFO ]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:47:14,348 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:47:14,348 INFO ]: Analyzing trace with hash 1618126293, now seen corresponding path program 8 times [2018-06-22 15:47:14,348 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:47:14,348 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:47:14,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:14,349 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 15:47:14,349 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:14,384 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:15,340 WARN ]: Spent 731.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2018-06-22 15:47:16,105 WARN ]: Spent 689.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2018-06-22 15:47:16,689 INFO ]: Checked inductivity of 136 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:47:16,689 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:47:16,689 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 15:47:16,695 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 15:47:16,734 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 15:47:16,734 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:16,740 INFO ]: Computing forward predicates... [2018-06-22 15:47:20,845 WARN ]: Spent 3.37 s on a formula simplification. DAG size of input: 688 DAG size of output: 35 [2018-06-22 15:47:22,035 INFO ]: Checked inductivity of 136 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2018-06-22 15:47:22,055 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:47:22,055 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2018-06-22 15:47:22,056 INFO ]: Interpolant automaton has 36 states [2018-06-22 15:47:22,056 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 15:47:22,056 INFO ]: CoverageRelationStatistics Valid=122, Invalid=1138, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 15:47:22,056 INFO ]: Start difference. First operand 27 states and 28 transitions. Second operand 36 states. [2018-06-22 15:47:23,292 WARN ]: Spent 1.16 s on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2018-06-22 15:47:23,569 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 29 [2018-06-22 15:47:23,830 WARN ]: Spent 203.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 34 [2018-06-22 15:47:24,176 WARN ]: Spent 290.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 44 [2018-06-22 15:47:24,583 WARN ]: Spent 368.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 49 [2018-06-22 15:47:25,037 WARN ]: Spent 364.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 41 [2018-06-22 15:47:25,438 WARN ]: Spent 360.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 58 [2018-06-22 15:47:25,898 WARN ]: Spent 378.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 42 [2018-06-22 15:47:27,246 WARN ]: Spent 1.30 s on a formula simplification. DAG size of input: 115 DAG size of output: 82 [2018-06-22 15:47:27,286 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:47:27,286 INFO ]: Finished difference Result 29 states and 30 transitions. [2018-06-22 15:47:27,286 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 15:47:27,286 INFO ]: Start accepts. Automaton has 36 states. Word has length 41 [2018-06-22 15:47:27,286 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:47:27,287 INFO ]: With dead ends: 29 [2018-06-22 15:47:27,287 INFO ]: Without dead ends: 29 [2018-06-22 15:47:27,288 INFO ]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2018-06-22 15:47:27,288 INFO ]: Start minimizeSevpa. Operand 29 states. [2018-06-22 15:47:27,292 INFO ]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-06-22 15:47:27,292 INFO ]: Start removeUnreachable. Operand 29 states. [2018-06-22 15:47:27,293 INFO ]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2018-06-22 15:47:27,293 INFO ]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 41 [2018-06-22 15:47:27,293 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:47:27,293 INFO ]: Abstraction has 29 states and 30 transitions. [2018-06-22 15:47:27,293 INFO ]: Interpolant automaton has 36 states. [2018-06-22 15:47:27,293 INFO ]: Start isEmpty. Operand 29 states and 30 transitions. [2018-06-22 15:47:27,294 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 15:47:27,294 INFO ]: Found error trace [2018-06-22 15:47:27,294 INFO ]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:47:27,294 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:47:27,294 INFO ]: Analyzing trace with hash 996918775, now seen corresponding path program 9 times [2018-06-22 15:47:27,294 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:47:27,294 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:47:27,295 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:27,295 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:47:27,295 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:27,329 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:28,120 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:47:28,120 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:47:28,121 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 15:47:28,126 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 15:47:28,242 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-06-22 15:47:28,242 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:28,248 INFO ]: Computing forward predicates... [2018-06-22 15:47:28,519 WARN ]: Spent 222.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2018-06-22 15:47:28,653 WARN ]: Spent 103.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2018-06-22 15:47:30,246 INFO ]: Checked inductivity of 171 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2018-06-22 15:47:30,266 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:47:30,296 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2018-06-22 15:47:30,296 INFO ]: Interpolant automaton has 38 states [2018-06-22 15:47:30,296 INFO ]: Constructing interpolant automaton starting with 38 interpolants. [2018-06-22 15:47:30,297 INFO ]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 15:47:30,297 INFO ]: Start difference. First operand 29 states and 30 transitions. Second operand 38 states. [2018-06-22 15:47:31,270 WARN ]: Spent 916.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2018-06-22 15:47:31,553 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 36 [2018-06-22 15:47:31,778 WARN ]: Spent 193.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 32 [2018-06-22 15:47:32,118 WARN ]: Spent 309.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 50 [2018-06-22 15:47:32,431 WARN ]: Spent 264.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 40 [2018-06-22 15:47:32,939 WARN ]: Spent 460.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 46 [2018-06-22 15:47:33,377 WARN ]: Spent 402.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 40 [2018-06-22 15:47:33,750 WARN ]: Spent 338.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 45 [2018-06-22 15:47:34,081 WARN ]: Spent 298.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 45 [2018-06-22 15:47:35,137 WARN ]: Spent 998.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 80 [2018-06-22 15:47:35,181 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 15:47:35,181 INFO ]: Finished difference Result 31 states and 32 transitions. [2018-06-22 15:47:35,181 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:47:35,182 INFO ]: Start accepts. Automaton has 38 states. Word has length 45 [2018-06-22 15:47:35,182 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 15:47:35,182 INFO ]: With dead ends: 31 [2018-06-22 15:47:35,182 INFO ]: Without dead ends: 31 [2018-06-22 15:47:35,183 INFO ]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2018-06-22 15:47:35,183 INFO ]: Start minimizeSevpa. Operand 31 states. [2018-06-22 15:47:35,186 INFO ]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-06-22 15:47:35,186 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 15:47:35,187 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-06-22 15:47:35,187 INFO ]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 45 [2018-06-22 15:47:35,187 INFO ]: Finished accepts. word is rejected. [2018-06-22 15:47:35,187 INFO ]: Abstraction has 31 states and 32 transitions. [2018-06-22 15:47:35,187 INFO ]: Interpolant automaton has 38 states. [2018-06-22 15:47:35,187 INFO ]: Start isEmpty. Operand 31 states and 32 transitions. [2018-06-22 15:47:35,188 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 15:47:35,188 INFO ]: Found error trace [2018-06-22 15:47:35,188 INFO ]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 15:47:35,188 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 15:47:35,188 INFO ]: Analyzing trace with hash -570306151, now seen corresponding path program 10 times [2018-06-22 15:47:35,188 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 15:47:35,188 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 15:47:35,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:35,189 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 15:47:35,189 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 15:47:35,241 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:36,277 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:47:36,277 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 15:47:36,277 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 15:47:36,284 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 15:47:36,334 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 15:47:36,334 INFO ]: Conjunction of SSA is unsat [2018-06-22 15:47:36,341 INFO ]: Computing forward predicates... [2018-06-22 15:47:43,588 WARN ]: Spent 6.00 s on a formula simplification. DAG size of input: 867 DAG size of output: 69 [2018-06-22 15:47:44,495 WARN ]: Spent 219.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2018-06-22 15:47:44,636 WARN ]: Spent 106.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 22 [2018-06-22 15:47:46,264 INFO ]: Checked inductivity of 210 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2018-06-22 15:47:46,283 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 15:47:46,283 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 41 [2018-06-22 15:47:46,284 INFO ]: Interpolant automaton has 41 states [2018-06-22 15:47:46,284 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 15:47:46,284 INFO ]: CoverageRelationStatistics Valid=133, Invalid=1507, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 15:47:46,285 INFO ]: Start difference. First operand 31 states and 32 transitions. Second operand 41 states. [2018-06-22 15:47:48,158 WARN ]: Spent 1.80 s on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2018-06-22 15:47:48,740 WARN ]: Spent 519.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 43 [2018-06-22 15:47:49,209 WARN ]: Spent 426.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 34 [2018-06-22 15:47:49,751 WARN ]: Spent 499.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 49 [2018-06-22 15:47:50,790 WARN ]: Spent 996.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 48 [2018-06-22 15:47:51,476 WARN ]: Spent 643.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 41 [2018-06-22 15:47:52,009 WARN ]: Spent 489.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 39 [2018-06-22 15:47:52,684 WARN ]: Spent 552.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 52 [2018-06-22 15:47:53,998 WARN ]: Spent 1.27 s on a formula simplification. DAG size of input: 159 DAG size of output: 51 [2018-06-22 15:47:54,880 WARN ]: Spent 777.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 53 Received shutdown request... [2018-06-22 15:47:56,395 WARN ]: Removed 8 from assertion stack [2018-06-22 15:47:56,395 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 15:47:56,395 WARN ]: Verification canceled [2018-06-22 15:47:56,399 WARN ]: Timeout [2018-06-22 15:47:56,399 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 03:47:56 BoogieIcfgContainer [2018-06-22 15:47:56,399 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 15:47:56,399 INFO ]: Toolchain (without parser) took 66207.87 ms. Allocated memory was 308.8 MB in the beginning and 762.8 MB in the end (delta: 454.0 MB). Free memory was 263.2 MB in the beginning and 569.5 MB in the end (delta: -306.3 MB). Peak memory consumption was 528.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:47:56,400 INFO ]: SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 15:47:56,400 INFO ]: ChcToBoogie took 45.01 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:47:56,401 INFO ]: Boogie Preprocessor took 40.41 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:47:56,401 INFO ]: RCFGBuilder took 286.15 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 251.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. [2018-06-22 15:47:56,401 INFO ]: TraceAbstraction took 65815.35 ms. Allocated memory was 308.8 MB in the beginning and 762.8 MB in the end (delta: 454.0 MB). Free memory was 251.2 MB in the beginning and 569.5 MB in the end (delta: -318.3 MB). Peak memory consumption was 516.7 MB. Max. memory is 3.6 GB. [2018-06-22 15:47:56,404 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.07 ms. Allocated memory is still 308.8 MB. Free memory is still 273.3 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 45.01 ms. Allocated memory is still 308.8 MB. Free memory was 263.2 MB in the beginning and 261.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.41 ms. Allocated memory is still 308.8 MB. Free memory was 261.2 MB in the beginning and 259.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 286.15 ms. Allocated memory is still 308.8 MB. Free memory was 259.2 MB in the beginning and 251.2 MB in the end (delta: 8.0 MB). Peak memory consumption was 8.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 65815.35 ms. Allocated memory was 308.8 MB in the beginning and 762.8 MB in the end (delta: 454.0 MB). Free memory was 251.2 MB in the beginning and 569.5 MB in the end (delta: -318.3 MB). Peak memory consumption was 516.7 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (31states) and interpolant automaton (currently 14 states, 41 states before enhancement), while PredicateUnifier was unifying predicates, while SimplifyDDAWithTimeout was simplifying term of DAG size 156. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 13 locations, 1 error locations. TIMEOUT Result, 65.7s OverallTime, 11 OverallIterations, 11 TraceHistogramMax, 28.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 147 SDtfs, 641 SDslu, 1231 SDs, 0 SdLazy, 1127 SolverSat, 769 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 518 GetRequests, 225 SyntacticMatches, 6 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 54.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 35.6s InterpolantComputationTime, 629 NumberOfCodeBlocks, 629 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 608 ConstructedInterpolants, 0 QuantifiedInterpolants, 7829820 SizeOfPredicates, 653 NumberOfNonLiveVariables, 2080 ConjunctsInSsa, 465 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 441/1650 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/up-nested.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_15-47-56-414.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/up-nested.c.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_15-47-56-414.csv Completed graceful shutdown