java -Xss4m -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC_wBE.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf -i /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-62c3406-m [2018-06-26 21:34:00,755 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-26 21:34:00,757 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-26 21:34:00,768 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-26 21:34:00,769 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-26 21:34:00,774 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-26 21:34:00,775 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-26 21:34:00,776 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-26 21:34:00,778 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-26 21:34:00,779 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-26 21:34:00,779 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-26 21:34:00,780 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-26 21:34:00,780 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-26 21:34:00,781 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-26 21:34:00,785 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-26 21:34:00,786 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-26 21:34:00,787 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-26 21:34:00,798 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-26 21:34:00,800 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-26 21:34:00,802 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-26 21:34:00,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-26 21:34:00,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-26 21:34:00,806 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-26 21:34:00,806 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-26 21:34:00,806 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-26 21:34:00,813 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-26 21:34:00,814 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-26 21:34:00,814 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-26 21:34:00,815 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-26 21:34:00,816 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-26 21:34:00,816 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-26 21:34:00,820 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-26 21:34:00,821 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-06-26 21:34:00,821 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-26 21:34:00,822 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-26 21:34:00,822 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-26 21:34:00,823 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-26 21:34:00,840 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-26 21:34:00,841 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-26 21:34:00,841 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-26 21:34:00,841 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-26 21:34:00,842 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-26 21:34:00,842 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-26 21:34:00,843 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-26 21:34:00,843 INFO L133 SettingsManager]: * Use SBE=true [2018-06-26 21:34:00,843 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-26 21:34:00,843 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-26 21:34:00,843 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-26 21:34:00,844 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-26 21:34:00,844 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-26 21:34:00,844 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-26 21:34:00,844 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-26 21:34:00,844 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-26 21:34:00,844 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-26 21:34:00,846 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-26 21:34:00,846 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-26 21:34:00,846 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-26 21:34:00,846 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-26 21:34:00,848 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-26 21:34:00,848 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-26 21:34:00,881 INFO ]: Repository-Root is: /tmp [2018-06-26 21:34:00,895 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-26 21:34:00,900 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-26 21:34:00,901 INFO ]: Initializing SmtParser... [2018-06-26 21:34:00,901 INFO ]: SmtParser initialized [2018-06-26 21:34:00,902 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-26 21:34:00,903 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 [2018-06-26 21:34:00,974 INFO ]: Executing SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 unknown [2018-06-26 21:34:01,484 INFO ]: Succesfully executed SMT file /storage/chc-comp/vmt-chc-benchmarks/ctigar/lifnat.c.smt2 [2018-06-26 21:34:01,489 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-26 21:34:01,494 INFO ]: Walking toolchain with 5 elements. [2018-06-26 21:34:01,495 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-26 21:34:01,495 INFO ]: Initializing ChcToBoogie... [2018-06-26 21:34:01,495 INFO ]: ChcToBoogie initialized [2018-06-26 21:34:01,498 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,570 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01 Unit [2018-06-26 21:34:01,570 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-26 21:34:01,572 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-26 21:34:01,572 INFO ]: Initializing Boogie Preprocessor... [2018-06-26 21:34:01,572 INFO ]: Boogie Preprocessor initialized [2018-06-26 21:34:01,596 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,596 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,617 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,618 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,644 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,646 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,649 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (1/1) ... [2018-06-26 21:34:01,653 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-26 21:34:01,653 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-26 21:34:01,653 INFO ]: Initializing RCFGBuilder... [2018-06-26 21:34:01,653 INFO ]: RCFGBuilder initialized [2018-06-26 21:34:01,654 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (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) [2018-06-26 21:34:01,665 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-26 21:34:01,665 INFO ]: Found specification of procedure gotoProc [2018-06-26 21:34:01,665 INFO ]: Found implementation of procedure gotoProc [2018-06-26 21:34:01,665 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-26 21:34:01,665 INFO ]: Found specification of procedure Ultimate.START [2018-06-26 21:34:01,665 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 [2018-06-26 21:34:02,138 INFO ]: Using library mode [2018-06-26 21:34:02,139 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:34:02 BoogieIcfgContainer [2018-06-26 21:34:02,139 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-26 21:34:02,140 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-26 21:34:02,140 INFO ]: Initializing BlockEncodingV2... [2018-06-26 21:34:02,140 INFO ]: BlockEncodingV2 initialized [2018-06-26 21:34:02,142 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:34:02" (1/1) ... [2018-06-26 21:34:02,158 INFO ]: Initial Icfg 10 locations, 10 edges [2018-06-26 21:34:02,159 INFO ]: Using Remove infeasible edges [2018-06-26 21:34:02,160 INFO ]: Using Maximize final states [2018-06-26 21:34:02,161 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-26 21:34:02,161 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-26 21:34:02,163 INFO ]: Using Remove sink states [2018-06-26 21:34:02,163 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-26 21:34:02,164 INFO ]: Using Use SBE [2018-06-26 21:34:02,172 WARN ]: expecting exponential blowup for input size 8 [2018-06-26 21:34:02,288 WARN ]: aborting because of expected exponential blowup for input size 156 [2018-06-26 21:34:02,301 WARN ]: aborting because of expected exponential blowup for input size 156 [2018-06-26 21:34:02,302 INFO ]: SBE split 1 edges [2018-06-26 21:34:02,308 INFO ]: Removed 2 edges and 2 locations because of local infeasibility [2018-06-26 21:34:02,311 INFO ]: 0 new accepting states [2018-06-26 21:34:02,501 INFO ]: Removed 13 edges and 2 locations by large block encoding [2018-06-26 21:34:02,503 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:34:02,504 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-26 21:34:02,505 INFO ]: 0 new accepting states [2018-06-26 21:34:02,505 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-26 21:34:02,505 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-26 21:34:02,505 INFO ]: Encoded RCFG 6 locations, 15 edges [2018-06-26 21:34:02,505 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:34:02 BasicIcfg [2018-06-26 21:34:02,505 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-26 21:34:02,507 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-26 21:34:02,507 INFO ]: Initializing TraceAbstraction... [2018-06-26 21:34:02,512 INFO ]: TraceAbstraction initialized [2018-06-26 21:34:02,512 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 26.06 09:34:01" (1/4) ... [2018-06-26 21:34:02,513 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec5e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 26.06 09:34:02, skipping insertion in model container [2018-06-26 21:34:02,513 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 26.06 09:34:01" (2/4) ... [2018-06-26 21:34:02,514 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec5e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.06 09:34:02, skipping insertion in model container [2018-06-26 21:34:02,514 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.06 09:34:02" (3/4) ... [2018-06-26 21:34:02,514 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dec5e69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:34:02, skipping insertion in model container [2018-06-26 21:34:02,514 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 26.06 09:34:02" (4/4) ... [2018-06-26 21:34:02,515 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-26 21:34:02,526 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-26 21:34:02,535 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-26 21:34:02,586 INFO ]: Using default assertion order modulation [2018-06-26 21:34:02,587 INFO ]: Interprodecural is true [2018-06-26 21:34:02,587 INFO ]: Hoare is false [2018-06-26 21:34:02,587 INFO ]: Compute interpolants for FPandBP [2018-06-26 21:34:02,587 INFO ]: Backedges is TWOTRACK [2018-06-26 21:34:02,587 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-26 21:34:02,587 INFO ]: Difference is false [2018-06-26 21:34:02,587 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-26 21:34:02,587 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-26 21:34:02,601 INFO ]: Start isEmpty. Operand 6 states. [2018-06-26 21:34:02,614 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:34:02,615 INFO ]: Found error trace [2018-06-26 21:34:02,615 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:34:02,616 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:02,621 INFO ]: Analyzing trace with hash 35718731, now seen corresponding path program 1 times [2018-06-26 21:34:02,623 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:02,623 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:02,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:02,671 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:02,671 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:02,719 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:02,816 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:02,821 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:34:02,821 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:34:02,823 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:34:02,839 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:34:02,839 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:34:02,842 INFO ]: Start difference. First operand 6 states. Second operand 3 states. [2018-06-26 21:34:03,048 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:03,048 INFO ]: Finished difference Result 7 states and 16 transitions. [2018-06-26 21:34:03,049 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:34:03,050 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:34:03,050 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:03,068 INFO ]: With dead ends: 7 [2018-06-26 21:34:03,068 INFO ]: Without dead ends: 7 [2018-06-26 21:34:03,079 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:34:03,098 INFO ]: Start minimizeSevpa. Operand 7 states. [2018-06-26 21:34:03,118 INFO ]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-06-26 21:34:03,120 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:34:03,120 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-06-26 21:34:03,122 INFO ]: Start accepts. Automaton has 7 states and 16 transitions. Word has length 5 [2018-06-26 21:34:03,122 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:03,122 INFO ]: Abstraction has 7 states and 16 transitions. [2018-06-26 21:34:03,122 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:34:03,123 INFO ]: Start isEmpty. Operand 7 states and 16 transitions. [2018-06-26 21:34:03,123 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-26 21:34:03,123 INFO ]: Found error trace [2018-06-26 21:34:03,123 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-26 21:34:03,123 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:03,123 INFO ]: Analyzing trace with hash 35808104, now seen corresponding path program 1 times [2018-06-26 21:34:03,123 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:03,123 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:03,124 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:03,124 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:03,124 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:03,131 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:03,191 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:03,192 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-26 21:34:03,192 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-26 21:34:03,193 INFO ]: Interpolant automaton has 3 states [2018-06-26 21:34:03,193 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-26 21:34:03,193 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:34:03,193 INFO ]: Start difference. First operand 7 states and 16 transitions. Second operand 3 states. [2018-06-26 21:34:03,380 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:03,381 INFO ]: Finished difference Result 8 states and 17 transitions. [2018-06-26 21:34:03,381 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-26 21:34:03,381 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-26 21:34:03,382 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:03,382 INFO ]: With dead ends: 8 [2018-06-26 21:34:03,382 INFO ]: Without dead ends: 8 [2018-06-26 21:34:03,383 INFO ]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-26 21:34:03,383 INFO ]: Start minimizeSevpa. Operand 8 states. [2018-06-26 21:34:03,384 INFO ]: Finished minimizeSevpa. Reduced states from 8 to 7. [2018-06-26 21:34:03,384 INFO ]: Start removeUnreachable. Operand 7 states. [2018-06-26 21:34:03,384 INFO ]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2018-06-26 21:34:03,384 INFO ]: Start accepts. Automaton has 7 states and 16 transitions. Word has length 5 [2018-06-26 21:34:03,384 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:03,384 INFO ]: Abstraction has 7 states and 16 transitions. [2018-06-26 21:34:03,384 INFO ]: Interpolant automaton has 3 states. [2018-06-26 21:34:03,385 INFO ]: Start isEmpty. Operand 7 states and 16 transitions. [2018-06-26 21:34:03,385 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:34:03,385 INFO ]: Found error trace [2018-06-26 21:34:03,385 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:34:03,385 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:03,385 INFO ]: Analyzing trace with hash 1106437062, now seen corresponding path program 1 times [2018-06-26 21:34:03,385 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:03,385 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:03,387 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:03,387 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:03,387 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:03,521 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:03,789 WARN ]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-26 21:34:03,790 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:03,790 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:03,790 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 [2018-06-26 21:34:03,796 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:03,874 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:03,881 INFO ]: Computing forward predicates... [2018-06-26 21:34:05,601 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:05,627 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:34:05,627 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-06-26 21:34:05,627 INFO ]: Interpolant automaton has 4 states [2018-06-26 21:34:05,627 INFO ]: Constructing interpolant automaton starting with 4 interpolants. [2018-06-26 21:34:05,627 INFO ]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 21:34:05,627 INFO ]: Start difference. First operand 7 states and 16 transitions. Second operand 4 states. [2018-06-26 21:34:05,684 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:05,684 INFO ]: Finished difference Result 9 states and 18 transitions. [2018-06-26 21:34:05,685 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-26 21:34:05,685 INFO ]: Start accepts. Automaton has 4 states. Word has length 6 [2018-06-26 21:34:05,685 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:05,685 INFO ]: With dead ends: 9 [2018-06-26 21:34:05,685 INFO ]: Without dead ends: 9 [2018-06-26 21:34:05,686 INFO ]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-06-26 21:34:05,686 INFO ]: Start minimizeSevpa. Operand 9 states. [2018-06-26 21:34:05,687 INFO ]: Finished minimizeSevpa. Reduced states from 9 to 8. [2018-06-26 21:34:05,687 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:34:05,688 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-06-26 21:34:05,688 INFO ]: Start accepts. Automaton has 8 states and 17 transitions. Word has length 6 [2018-06-26 21:34:05,688 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:05,688 INFO ]: Abstraction has 8 states and 17 transitions. [2018-06-26 21:34:05,688 INFO ]: Interpolant automaton has 4 states. [2018-06-26 21:34:05,688 INFO ]: Start isEmpty. Operand 8 states and 17 transitions. [2018-06-26 21:34:05,688 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:34:05,688 INFO ]: Found error trace [2018-06-26 21:34:05,688 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:34:05,689 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:05,689 INFO ]: Analyzing trace with hash 1107360583, now seen corresponding path program 1 times [2018-06-26 21:34:05,689 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:05,689 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:05,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:05,689 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:05,689 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:05,763 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:06,175 WARN ]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-06-26 21:34:06,175 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:06,175 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:06,175 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) [2018-06-26 21:34:06,190 INFO ]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:34:06,289 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:06,293 INFO ]: Computing forward predicates... [2018-06-26 21:34:06,832 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:34:09,737 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:09,757 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:34:09,757 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:34:09,757 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:34:09,757 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:34:09,757 INFO ]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:34:09,757 INFO ]: Start difference. First operand 8 states and 17 transitions. Second operand 5 states. [2018-06-26 21:34:09,819 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:09,819 INFO ]: Finished difference Result 16 states and 25 transitions. [2018-06-26 21:34:09,819 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:34:09,819 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:34:09,819 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:09,820 INFO ]: With dead ends: 16 [2018-06-26 21:34:09,820 INFO ]: Without dead ends: 16 [2018-06-26 21:34:09,820 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-06-26 21:34:09,820 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-26 21:34:09,822 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 8. [2018-06-26 21:34:09,822 INFO ]: Start removeUnreachable. Operand 8 states. [2018-06-26 21:34:09,823 INFO ]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2018-06-26 21:34:09,823 INFO ]: Start accepts. Automaton has 8 states and 17 transitions. Word has length 6 [2018-06-26 21:34:09,823 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:09,823 INFO ]: Abstraction has 8 states and 17 transitions. [2018-06-26 21:34:09,823 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:34:09,823 INFO ]: Start isEmpty. Operand 8 states and 17 transitions. [2018-06-26 21:34:09,823 INFO ]: Finished isEmpty. Found accepting run of length 7 [2018-06-26 21:34:09,823 INFO ]: Found error trace [2018-06-26 21:34:09,823 INFO ]: trace histogram [1, 1, 1, 1, 1, 1] [2018-06-26 21:34:09,823 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:09,824 INFO ]: Analyzing trace with hash 1108284104, now seen corresponding path program 1 times [2018-06-26 21:34:09,824 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:09,824 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:09,824 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:09,824 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:09,824 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:09,866 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:10,035 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:10,035 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:10,035 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 [2018-06-26 21:34:10,041 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:10,081 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:10,082 INFO ]: Computing forward predicates... [2018-06-26 21:34:10,487 WARN ]: expecting exponential blowup for input size 6 [2018-06-26 21:34:13,271 INFO ]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:13,290 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:34:13,290 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2018-06-26 21:34:13,290 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:34:13,290 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:34:13,291 INFO ]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:34:13,291 INFO ]: Start difference. First operand 8 states and 17 transitions. Second operand 5 states. [2018-06-26 21:34:13,352 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:13,353 INFO ]: Finished difference Result 13 states and 22 transitions. [2018-06-26 21:34:13,353 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-26 21:34:13,353 INFO ]: Start accepts. Automaton has 5 states. Word has length 6 [2018-06-26 21:34:13,353 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:13,353 INFO ]: With dead ends: 13 [2018-06-26 21:34:13,353 INFO ]: Without dead ends: 13 [2018-06-26 21:34:13,353 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:34:13,354 INFO ]: Start minimizeSevpa. Operand 13 states. [2018-06-26 21:34:13,355 INFO ]: Finished minimizeSevpa. Reduced states from 13 to 9. [2018-06-26 21:34:13,355 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:34:13,355 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-26 21:34:13,355 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 6 [2018-06-26 21:34:13,355 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:13,355 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-26 21:34:13,355 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:34:13,355 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-26 21:34:13,355 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:34:13,355 INFO ]: Found error trace [2018-06-26 21:34:13,356 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:34:13,356 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:13,356 INFO ]: Analyzing trace with hash -32403894, now seen corresponding path program 2 times [2018-06-26 21:34:13,356 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:13,356 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:13,356 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:13,356 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:13,356 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:13,430 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:13,742 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:13,742 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:13,756 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 [2018-06-26 21:34:13,762 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:34:13,858 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:34:13,859 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:13,862 INFO ]: Computing forward predicates... [2018-06-26 21:34:14,888 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:14,908 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:34:14,908 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-06-26 21:34:14,908 INFO ]: Interpolant automaton has 5 states [2018-06-26 21:34:14,908 INFO ]: Constructing interpolant automaton starting with 5 interpolants. [2018-06-26 21:34:14,908 INFO ]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-06-26 21:34:14,909 INFO ]: Start difference. First operand 9 states and 18 transitions. Second operand 5 states. [2018-06-26 21:34:15,023 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:15,023 INFO ]: Finished difference Result 14 states and 23 transitions. [2018-06-26 21:34:15,023 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-06-26 21:34:15,023 INFO ]: Start accepts. Automaton has 5 states. Word has length 7 [2018-06-26 21:34:15,023 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:15,024 INFO ]: With dead ends: 14 [2018-06-26 21:34:15,024 INFO ]: Without dead ends: 14 [2018-06-26 21:34:15,024 INFO ]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:34:15,024 INFO ]: Start minimizeSevpa. Operand 14 states. [2018-06-26 21:34:15,025 INFO ]: Finished minimizeSevpa. Reduced states from 14 to 9. [2018-06-26 21:34:15,025 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:34:15,026 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-26 21:34:15,026 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 7 [2018-06-26 21:34:15,026 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:15,026 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-26 21:34:15,026 INFO ]: Interpolant automaton has 5 states. [2018-06-26 21:34:15,026 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-26 21:34:15,026 INFO ]: Finished isEmpty. Found accepting run of length 8 [2018-06-26 21:34:15,026 INFO ]: Found error trace [2018-06-26 21:34:15,026 INFO ]: trace histogram [2, 1, 1, 1, 1, 1] [2018-06-26 21:34:15,026 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:15,026 INFO ]: Analyzing trace with hash 82112710, now seen corresponding path program 1 times [2018-06-26 21:34:15,026 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:15,026 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:15,027 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:15,027 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-26 21:34:15,027 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:15,084 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:15,272 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:15,272 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:15,273 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 [2018-06-26 21:34:15,280 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:15,372 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:15,376 INFO ]: Computing forward predicates... [2018-06-26 21:34:18,867 INFO ]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:18,890 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-26 21:34:18,898 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2018-06-26 21:34:18,899 INFO ]: Interpolant automaton has 6 states [2018-06-26 21:34:18,899 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-26 21:34:18,899 INFO ]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-06-26 21:34:18,899 INFO ]: Start difference. First operand 9 states and 18 transitions. Second operand 6 states. [2018-06-26 21:34:18,978 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-26 21:34:18,978 INFO ]: Finished difference Result 16 states and 25 transitions. [2018-06-26 21:34:18,978 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-26 21:34:18,978 INFO ]: Start accepts. Automaton has 6 states. Word has length 7 [2018-06-26 21:34:18,978 INFO ]: Finished accepts. some prefix is accepted. [2018-06-26 21:34:18,978 INFO ]: With dead ends: 16 [2018-06-26 21:34:18,978 INFO ]: Without dead ends: 16 [2018-06-26 21:34:18,979 INFO ]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2018-06-26 21:34:18,979 INFO ]: Start minimizeSevpa. Operand 16 states. [2018-06-26 21:34:18,980 INFO ]: Finished minimizeSevpa. Reduced states from 16 to 9. [2018-06-26 21:34:18,980 INFO ]: Start removeUnreachable. Operand 9 states. [2018-06-26 21:34:18,980 INFO ]: Finished removeUnreachable. Reduced from 9 states to 9 states and 18 transitions. [2018-06-26 21:34:18,981 INFO ]: Start accepts. Automaton has 9 states and 18 transitions. Word has length 7 [2018-06-26 21:34:18,981 INFO ]: Finished accepts. word is rejected. [2018-06-26 21:34:18,981 INFO ]: Abstraction has 9 states and 18 transitions. [2018-06-26 21:34:18,981 INFO ]: Interpolant automaton has 6 states. [2018-06-26 21:34:18,981 INFO ]: Start isEmpty. Operand 9 states and 18 transitions. [2018-06-26 21:34:18,981 INFO ]: Finished isEmpty. Found accepting run of length 9 [2018-06-26 21:34:18,981 INFO ]: Found error trace [2018-06-26 21:34:18,981 INFO ]: trace histogram [3, 1, 1, 1, 1, 1] [2018-06-26 21:34:18,981 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-26 21:34:18,981 INFO ]: Analyzing trace with hash -1892867994, now seen corresponding path program 2 times [2018-06-26 21:34:18,981 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-26 21:34:18,981 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-26 21:34:18,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:18,982 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-26 21:34:18,982 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-26 21:34:19,071 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:19,248 INFO ]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-26 21:34:19,248 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-26 21:34:19,248 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 [2018-06-26 21:34:19,254 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-26 21:34:19,352 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-26 21:34:19,352 INFO ]: Conjunction of SSA is unsat [2018-06-26 21:34:19,356 INFO ]: Computing forward predicates... Received shutdown request... [2018-06-26 21:35:12,302 INFO ]: Timeout while computing interpolants [2018-06-26 21:35:12,503 WARN ]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-26 21:35:12,503 WARN ]: Verification canceled [2018-06-26 21:35:12,505 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-26 21:35:12,506 WARN ]: Timeout [2018-06-26 21:35:12,506 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.06 09:35:12 BasicIcfg [2018-06-26 21:35:12,506 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-26 21:35:12,507 INFO ]: Toolchain (without parser) took 71017.29 ms. Allocated memory was 309.3 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 232.9 MB in the beginning and 1.1 GB in the end (delta: -860.3 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,508 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-26 21:35:12,508 INFO ]: ChcToBoogie took 77.26 ms. Allocated memory is still 309.3 MB. Free memory was 232.9 MB in the beginning and 229.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,511 INFO ]: Boogie Preprocessor took 80.51 ms. Allocated memory is still 309.3 MB. Free memory was 229.9 MB in the beginning and 227.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,512 INFO ]: RCFGBuilder took 485.79 ms. Allocated memory is still 309.3 MB. Free memory was 227.9 MB in the beginning and 199.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,512 INFO ]: BlockEncodingV2 took 365.94 ms. Allocated memory was 309.3 MB in the beginning and 330.8 MB in the end (delta: 21.5 MB). Free memory was 199.9 MB in the beginning and 284.0 MB in the end (delta: -84.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,513 INFO ]: TraceAbstraction took 69998.84 ms. Allocated memory was 330.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 282.5 MB in the beginning and 1.1 GB in the end (delta: -810.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. [2018-06-26 21:35:12,520 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 10 locations, 10 edges - StatisticsResult: Encoded RCFG 6 locations, 15 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 309.3 MB. Free memory is still 275.0 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 77.26 ms. Allocated memory is still 309.3 MB. Free memory was 232.9 MB in the beginning and 229.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 80.51 ms. Allocated memory is still 309.3 MB. Free memory was 229.9 MB in the beginning and 227.9 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * RCFGBuilder took 485.79 ms. Allocated memory is still 309.3 MB. Free memory was 227.9 MB in the beginning and 199.9 MB in the end (delta: 28.1 MB). Peak memory consumption was 28.1 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 365.94 ms. Allocated memory was 309.3 MB in the beginning and 330.8 MB in the end (delta: 21.5 MB). Free memory was 199.9 MB in the beginning and 284.0 MB in the end (delta: -84.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 3.6 GB. * TraceAbstraction took 69998.84 ms. Allocated memory was 330.8 MB in the beginning and 1.5 GB in the end (delta: 1.2 GB). Free memory was 282.5 MB in the beginning and 1.1 GB in the end (delta: -810.7 MB). Peak memory consumption was 1.3 GB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 9 with TraceHistMax 3, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 29 quantified variables from 32 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 6 locations, 1 error locations. TIMEOUT Result, 69.9s OverallTime, 8 OverallIterations, 3 TraceHistogramMax, 0.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 99 SDtfs, 0 SDslu, 45 SDs, 0 SdLazy, 89 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 26 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 14.3s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 980 SizeOfPredicates, 35 NumberOfNonLiveVariables, 1520 ConjunctsInSsa, 105 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/18 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/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-26_21-35-12-544.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-26_21-35-12-544.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-26_21-35-12-544.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/lifnat.c.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-26_21-35-12-544.csv Completed graceful shutdown