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/hopv/lia/mochi/a-max.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-14921ce [2018-06-24 21:12:37,841 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-24 21:12:37,843 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-24 21:12:37,860 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-24 21:12:37,861 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-24 21:12:37,862 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-24 21:12:37,863 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-24 21:12:37,865 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-24 21:12:37,866 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-24 21:12:37,868 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-24 21:12:37,869 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-24 21:12:37,869 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-24 21:12:37,870 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-24 21:12:37,873 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-24 21:12:37,874 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-24 21:12:37,875 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-24 21:12:37,876 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-24 21:12:37,886 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-24 21:12:37,887 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-24 21:12:37,888 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-24 21:12:37,889 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-24 21:12:37,894 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-06-24 21:12:37,908 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_Goto.epf [2018-06-24 21:12:37,925 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-24 21:12:37,925 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-24 21:12:37,925 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-24 21:12:37,925 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-24 21:12:37,926 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-06-24 21:12:37,927 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-06-24 21:12:37,927 INFO L133 SettingsManager]: * Create interprocedural compositions=false [2018-06-24 21:12:37,927 INFO L133 SettingsManager]: * Use SBE=true [2018-06-24 21:12:37,927 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-24 21:12:37,927 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-24 21:12:37,928 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-24 21:12:37,928 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-24 21:12:37,928 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-24 21:12:37,928 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-24 21:12:37,928 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-24 21:12:37,928 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-24 21:12:37,929 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-24 21:12:37,929 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-24 21:12:37,929 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-24 21:12:37,929 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-24 21:12:37,929 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-24 21:12:37,931 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-24 21:12:37,931 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-24 21:12:37,970 INFO ]: Repository-Root is: /tmp [2018-06-24 21:12:37,989 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-24 21:12:37,993 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-24 21:12:37,995 INFO ]: Initializing SmtParser... [2018-06-24 21:12:37,995 INFO ]: SmtParser initialized [2018-06-24 21:12:37,995 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/hopv/lia/mochi/a-max.smt2 [2018-06-24 21:12:37,996 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 [2018-06-24 21:12:38,090 INFO ]: Executing SMT file /storage/chc-comp/hopv/lia/mochi/a-max.smt2 unknown [2018-06-24 21:12:38,337 INFO ]: Succesfully executed SMT file /storage/chc-comp/hopv/lia/mochi/a-max.smt2 [2018-06-24 21:12:38,341 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-24 21:12:38,346 INFO ]: Walking toolchain with 5 elements. [2018-06-24 21:12:38,347 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-24 21:12:38,347 INFO ]: Initializing ChcToBoogie... [2018-06-24 21:12:38,347 INFO ]: ChcToBoogie initialized [2018-06-24 21:12:38,358 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,429 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38 Unit [2018-06-24 21:12:38,429 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-24 21:12:38,430 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-24 21:12:38,430 INFO ]: Initializing Boogie Preprocessor... [2018-06-24 21:12:38,430 INFO ]: Boogie Preprocessor initialized [2018-06-24 21:12:38,452 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,452 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,460 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,461 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,465 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,468 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,469 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,471 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-24 21:12:38,471 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-24 21:12:38,471 INFO ]: Initializing RCFGBuilder... [2018-06-24 21:12:38,471 INFO ]: RCFGBuilder initialized [2018-06-24 21:12:38,472 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (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) [2018-06-24 21:12:38,490 INFO ]: Specification and implementation of procedure gotoProc given in one single declaration [2018-06-24 21:12:38,490 INFO ]: Found specification of procedure gotoProc [2018-06-24 21:12:38,490 INFO ]: Found implementation of procedure gotoProc [2018-06-24 21:12:38,490 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-24 21:12:38,490 INFO ]: Found specification of procedure Ultimate.START [2018-06-24 21:12:38,490 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 [2018-06-24 21:12:38,902 INFO ]: Using library mode [2018-06-24 21:12:38,902 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:38 BoogieIcfgContainer [2018-06-24 21:12:38,902 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-24 21:12:38,903 INFO ]: ------------------------BlockEncodingV2---------------------------- [2018-06-24 21:12:38,903 INFO ]: Initializing BlockEncodingV2... [2018-06-24 21:12:38,904 INFO ]: BlockEncodingV2 initialized [2018-06-24 21:12:38,904 INFO ]: Executing the observer BlockEncodingObserver from plugin BlockEncodingV2 for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:38" (1/1) ... [2018-06-24 21:12:38,920 INFO ]: Initial Icfg 22 locations, 32 edges [2018-06-24 21:12:38,922 INFO ]: Using Remove infeasible edges [2018-06-24 21:12:38,922 INFO ]: Using Maximize final states [2018-06-24 21:12:38,923 INFO ]: Using Minimize states even if more edges are added than removed.=false [2018-06-24 21:12:38,923 INFO ]: Using Minimize states using LBE with the strategy=MULTI [2018-06-24 21:12:38,925 INFO ]: Using Remove sink states [2018-06-24 21:12:38,926 INFO ]: Using Apply optimizations until nothing changes=true [2018-06-24 21:12:38,926 INFO ]: Using Use SBE [2018-06-24 21:12:38,946 WARN ]: expecting exponential blowup for input size 6 [2018-06-24 21:12:38,963 INFO ]: SBE split 0 edges [2018-06-24 21:12:38,972 INFO ]: Removed 3 edges and 2 locations because of local infeasibility [2018-06-24 21:12:38,973 INFO ]: 0 new accepting states [2018-06-24 21:12:39,051 INFO ]: Removed 13 edges and 5 locations by large block encoding [2018-06-24 21:12:39,053 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:12:39,054 INFO ]: Removed 0 edges and 0 locations because of local infeasibility [2018-06-24 21:12:39,054 INFO ]: 0 new accepting states [2018-06-24 21:12:39,055 INFO ]: Removed 0 edges and 0 locations by large block encoding [2018-06-24 21:12:39,055 INFO ]: Removed 0 edges and 0 locations by removing sink states [2018-06-24 21:12:39,055 INFO ]: Encoded RCFG 15 locations, 24 edges [2018-06-24 21:12:39,055 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:12:39 BasicIcfg [2018-06-24 21:12:39,056 INFO ]: ------------------------ END BlockEncodingV2---------------------------- [2018-06-24 21:12:39,058 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-24 21:12:39,058 INFO ]: Initializing TraceAbstraction... [2018-06-24 21:12:39,061 INFO ]: TraceAbstraction initialized [2018-06-24 21:12:39,061 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 24.06 09:12:38" (1/4) ... [2018-06-24 21:12:39,064 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0e2207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 24.06 09:12:39, skipping insertion in model container [2018-06-24 21:12:39,064 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 24.06 09:12:38" (2/4) ... [2018-06-24 21:12:39,064 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0e2207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.06 09:12:39, skipping insertion in model container [2018-06-24 21:12:39,064 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.06 09:12:38" (3/4) ... [2018-06-24 21:12:39,064 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a0e2207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:12:39, skipping insertion in model container [2018-06-24 21:12:39,064 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.blockencoding CFG 24.06 09:12:39" (4/4) ... [2018-06-24 21:12:39,066 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver_BEv2 [2018-06-24 21:12:39,078 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-24 21:12:39,086 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-24 21:12:39,132 INFO ]: Using default assertion order modulation [2018-06-24 21:12:39,132 INFO ]: Interprodecural is true [2018-06-24 21:12:39,132 INFO ]: Hoare is false [2018-06-24 21:12:39,132 INFO ]: Compute interpolants for FPandBP [2018-06-24 21:12:39,132 INFO ]: Backedges is TWOTRACK [2018-06-24 21:12:39,132 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-24 21:12:39,132 INFO ]: Difference is false [2018-06-24 21:12:39,132 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-24 21:12:39,132 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-24 21:12:39,147 INFO ]: Start isEmpty. Operand 15 states. [2018-06-24 21:12:39,157 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:12:39,157 INFO ]: Found error trace [2018-06-24 21:12:39,158 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:12:39,158 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:39,163 INFO ]: Analyzing trace with hash 38855145, now seen corresponding path program 1 times [2018-06-24 21:12:39,165 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:39,166 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:39,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:39,201 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:39,201 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:39,256 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:39,314 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:39,316 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:39,316 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:39,318 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:39,331 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:39,331 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:39,334 INFO ]: Start difference. First operand 15 states. Second operand 3 states. [2018-06-24 21:12:39,606 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:39,606 INFO ]: Finished difference Result 27 states and 44 transitions. [2018-06-24 21:12:39,607 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:39,609 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:12:39,609 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:39,622 INFO ]: With dead ends: 27 [2018-06-24 21:12:39,622 INFO ]: Without dead ends: 27 [2018-06-24 21:12:39,624 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 [2018-06-24 21:12:39,642 INFO ]: Start minimizeSevpa. Operand 27 states. [2018-06-24 21:12:39,674 INFO ]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-06-24 21:12:39,675 INFO ]: Start removeUnreachable. Operand 27 states. [2018-06-24 21:12:39,677 INFO ]: Finished removeUnreachable. Reduced from 27 states to 27 states and 44 transitions. [2018-06-24 21:12:39,679 INFO ]: Start accepts. Automaton has 27 states and 44 transitions. Word has length 5 [2018-06-24 21:12:39,679 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:39,679 INFO ]: Abstraction has 27 states and 44 transitions. [2018-06-24 21:12:39,679 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:39,679 INFO ]: Start isEmpty. Operand 27 states and 44 transitions. [2018-06-24 21:12:39,680 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:12:39,681 INFO ]: Found error trace [2018-06-24 21:12:39,681 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:12:39,682 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:39,682 INFO ]: Analyzing trace with hash 38915688, now seen corresponding path program 1 times [2018-06-24 21:12:39,682 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:39,682 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:39,683 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:39,683 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:39,683 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:39,689 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:39,726 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:39,726 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:39,726 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:39,727 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:39,727 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:39,727 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:39,728 INFO ]: Start difference. First operand 27 states and 44 transitions. Second operand 3 states. [2018-06-24 21:12:39,991 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:39,991 INFO ]: Finished difference Result 39 states and 65 transitions. [2018-06-24 21:12:39,992 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:39,992 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:12:39,993 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:39,994 INFO ]: With dead ends: 39 [2018-06-24 21:12:39,994 INFO ]: Without dead ends: 39 [2018-06-24 21:12:39,995 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 [2018-06-24 21:12:39,995 INFO ]: Start minimizeSevpa. Operand 39 states. [2018-06-24 21:12:40,005 INFO ]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-06-24 21:12:40,005 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-24 21:12:40,007 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 65 transitions. [2018-06-24 21:12:40,007 INFO ]: Start accepts. Automaton has 39 states and 65 transitions. Word has length 5 [2018-06-24 21:12:40,007 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:40,008 INFO ]: Abstraction has 39 states and 65 transitions. [2018-06-24 21:12:40,008 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:40,008 INFO ]: Start isEmpty. Operand 39 states and 65 transitions. [2018-06-24 21:12:40,011 INFO ]: Finished isEmpty. Found accepting run of length 6 [2018-06-24 21:12:40,011 INFO ]: Found error trace [2018-06-24 21:12:40,011 INFO ]: trace histogram [1, 1, 1, 1, 1] [2018-06-24 21:12:40,011 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:40,011 INFO ]: Analyzing trace with hash 39005061, now seen corresponding path program 1 times [2018-06-24 21:12:40,011 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:40,011 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:40,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:40,012 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:40,012 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:40,030 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:40,096 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-24 21:12:40,096 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-24 21:12:40,097 INFO ]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-06-24 21:12:40,097 INFO ]: Interpolant automaton has 3 states [2018-06-24 21:12:40,097 INFO ]: Constructing interpolant automaton starting with 3 interpolants. [2018-06-24 21:12:40,097 INFO ]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-06-24 21:12:40,097 INFO ]: Start difference. First operand 39 states and 65 transitions. Second operand 3 states. [2018-06-24 21:12:40,130 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:40,130 INFO ]: Finished difference Result 50 states and 95 transitions. [2018-06-24 21:12:40,130 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-06-24 21:12:40,130 INFO ]: Start accepts. Automaton has 3 states. Word has length 5 [2018-06-24 21:12:40,130 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:40,133 INFO ]: With dead ends: 50 [2018-06-24 21:12:40,133 INFO ]: Without dead ends: 50 [2018-06-24 21:12:40,133 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 [2018-06-24 21:12:40,134 INFO ]: Start minimizeSevpa. Operand 50 states. [2018-06-24 21:12:40,145 INFO ]: Finished minimizeSevpa. Reduced states from 50 to 42. [2018-06-24 21:12:40,145 INFO ]: Start removeUnreachable. Operand 42 states. [2018-06-24 21:12:40,147 INFO ]: Finished removeUnreachable. Reduced from 42 states to 42 states and 71 transitions. [2018-06-24 21:12:40,147 INFO ]: Start accepts. Automaton has 42 states and 71 transitions. Word has length 5 [2018-06-24 21:12:40,147 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:40,147 INFO ]: Abstraction has 42 states and 71 transitions. [2018-06-24 21:12:40,147 INFO ]: Interpolant automaton has 3 states. [2018-06-24 21:12:40,147 INFO ]: Start isEmpty. Operand 42 states and 71 transitions. [2018-06-24 21:12:40,150 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-24 21:12:40,150 INFO ]: Found error trace [2018-06-24 21:12:40,150 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:40,150 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:40,150 INFO ]: Analyzing trace with hash 1243498041, now seen corresponding path program 1 times [2018-06-24 21:12:40,150 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:40,150 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:40,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:40,151 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:40,151 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:40,182 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:40,280 INFO ]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:40,280 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:40,280 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 [2018-06-24 21:12:40,287 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:40,324 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:40,330 INFO ]: Computing forward predicates... [2018-06-24 21:12:40,470 INFO ]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:40,502 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:40,502 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2018-06-24 21:12:40,503 INFO ]: Interpolant automaton has 9 states [2018-06-24 21:12:40,503 INFO ]: Constructing interpolant automaton starting with 9 interpolants. [2018-06-24 21:12:40,503 INFO ]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-06-24 21:12:40,503 INFO ]: Start difference. First operand 42 states and 71 transitions. Second operand 9 states. [2018-06-24 21:12:41,023 WARN ]: Spent 142.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-24 21:12:41,299 WARN ]: Spent 149.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2018-06-24 21:12:41,730 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:41,731 INFO ]: Finished difference Result 69 states and 113 transitions. [2018-06-24 21:12:41,732 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-06-24 21:12:41,732 INFO ]: Start accepts. Automaton has 9 states. Word has length 11 [2018-06-24 21:12:41,733 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:41,734 INFO ]: With dead ends: 69 [2018-06-24 21:12:41,734 INFO ]: Without dead ends: 48 [2018-06-24 21:12:41,734 INFO ]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-06-24 21:12:41,735 INFO ]: Start minimizeSevpa. Operand 48 states. [2018-06-24 21:12:41,741 INFO ]: Finished minimizeSevpa. Reduced states from 48 to 42. [2018-06-24 21:12:41,741 INFO ]: Start removeUnreachable. Operand 42 states. [2018-06-24 21:12:41,742 INFO ]: Finished removeUnreachable. Reduced from 42 states to 42 states and 68 transitions. [2018-06-24 21:12:41,742 INFO ]: Start accepts. Automaton has 42 states and 68 transitions. Word has length 11 [2018-06-24 21:12:41,742 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:41,742 INFO ]: Abstraction has 42 states and 68 transitions. [2018-06-24 21:12:41,742 INFO ]: Interpolant automaton has 9 states. [2018-06-24 21:12:41,742 INFO ]: Start isEmpty. Operand 42 states and 68 transitions. [2018-06-24 21:12:41,743 INFO ]: Finished isEmpty. Found accepting run of length 12 [2018-06-24 21:12:41,743 INFO ]: Found error trace [2018-06-24 21:12:41,744 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:41,744 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:41,744 INFO ]: Analyzing trace with hash -250881258, now seen corresponding path program 1 times [2018-06-24 21:12:41,744 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:41,744 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:41,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:41,745 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:41,745 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:41,763 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:41,938 INFO ]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:41,938 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:41,938 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 [2018-06-24 21:12:41,946 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:41,963 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:41,965 INFO ]: Computing forward predicates... [2018-06-24 21:12:42,137 INFO ]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-24 21:12:42,157 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:42,157 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2018-06-24 21:12:42,157 INFO ]: Interpolant automaton has 12 states [2018-06-24 21:12:42,157 INFO ]: Constructing interpolant automaton starting with 12 interpolants. [2018-06-24 21:12:42,157 INFO ]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-06-24 21:12:42,157 INFO ]: Start difference. First operand 42 states and 68 transitions. Second operand 12 states. [2018-06-24 21:12:43,482 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:43,482 INFO ]: Finished difference Result 106 states and 231 transitions. [2018-06-24 21:12:43,482 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-24 21:12:43,482 INFO ]: Start accepts. Automaton has 12 states. Word has length 11 [2018-06-24 21:12:43,483 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:43,491 INFO ]: With dead ends: 106 [2018-06-24 21:12:43,491 INFO ]: Without dead ends: 90 [2018-06-24 21:12:43,491 INFO ]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2018-06-24 21:12:43,492 INFO ]: Start minimizeSevpa. Operand 90 states. [2018-06-24 21:12:43,510 INFO ]: Finished minimizeSevpa. Reduced states from 90 to 60. [2018-06-24 21:12:43,510 INFO ]: Start removeUnreachable. Operand 60 states. [2018-06-24 21:12:43,513 INFO ]: Finished removeUnreachable. Reduced from 60 states to 60 states and 113 transitions. [2018-06-24 21:12:43,513 INFO ]: Start accepts. Automaton has 60 states and 113 transitions. Word has length 11 [2018-06-24 21:12:43,513 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:43,513 INFO ]: Abstraction has 60 states and 113 transitions. [2018-06-24 21:12:43,513 INFO ]: Interpolant automaton has 12 states. [2018-06-24 21:12:43,513 INFO ]: Start isEmpty. Operand 60 states and 113 transitions. [2018-06-24 21:12:43,515 INFO ]: Finished isEmpty. Found accepting run of length 18 [2018-06-24 21:12:43,515 INFO ]: Found error trace [2018-06-24 21:12:43,515 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:43,515 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:43,515 INFO ]: Analyzing trace with hash -1480637174, now seen corresponding path program 1 times [2018-06-24 21:12:43,515 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:43,515 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:43,516 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:43,516 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:43,516 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:43,558 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:43,638 INFO ]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-24 21:12:43,638 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:43,638 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 [2018-06-24 21:12:43,647 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:43,671 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:43,673 INFO ]: Computing forward predicates... [2018-06-24 21:12:43,701 INFO ]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-24 21:12:43,726 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:43,726 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-06-24 21:12:43,726 INFO ]: Interpolant automaton has 6 states [2018-06-24 21:12:43,726 INFO ]: Constructing interpolant automaton starting with 6 interpolants. [2018-06-24 21:12:43,726 INFO ]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-06-24 21:12:43,726 INFO ]: Start difference. First operand 60 states and 113 transitions. Second operand 6 states. [2018-06-24 21:12:43,877 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:43,877 INFO ]: Finished difference Result 92 states and 174 transitions. [2018-06-24 21:12:43,882 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-24 21:12:43,882 INFO ]: Start accepts. Automaton has 6 states. Word has length 17 [2018-06-24 21:12:43,882 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:43,885 INFO ]: With dead ends: 92 [2018-06-24 21:12:43,885 INFO ]: Without dead ends: 92 [2018-06-24 21:12:43,885 INFO ]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-06-24 21:12:43,886 INFO ]: Start minimizeSevpa. Operand 92 states. [2018-06-24 21:12:43,902 INFO ]: Finished minimizeSevpa. Reduced states from 92 to 68. [2018-06-24 21:12:43,902 INFO ]: Start removeUnreachable. Operand 68 states. [2018-06-24 21:12:43,904 INFO ]: Finished removeUnreachable. Reduced from 68 states to 68 states and 129 transitions. [2018-06-24 21:12:43,904 INFO ]: Start accepts. Automaton has 68 states and 129 transitions. Word has length 17 [2018-06-24 21:12:43,904 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:43,904 INFO ]: Abstraction has 68 states and 129 transitions. [2018-06-24 21:12:43,906 INFO ]: Interpolant automaton has 6 states. [2018-06-24 21:12:43,906 INFO ]: Start isEmpty. Operand 68 states and 129 transitions. [2018-06-24 21:12:43,908 INFO ]: Finished isEmpty. Found accepting run of length 24 [2018-06-24 21:12:43,908 INFO ]: Found error trace [2018-06-24 21:12:43,908 INFO ]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:43,908 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:43,909 INFO ]: Analyzing trace with hash -1248829273, now seen corresponding path program 1 times [2018-06-24 21:12:43,909 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:43,909 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:43,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:43,909 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:43,909 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:43,947 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:44,090 INFO ]: Checked inductivity of 21 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:12:44,090 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:44,091 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 [2018-06-24 21:12:44,103 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:44,145 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:44,149 INFO ]: Computing forward predicates... [2018-06-24 21:12:44,474 INFO ]: Checked inductivity of 21 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-24 21:12:44,493 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:44,494 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2018-06-24 21:12:44,494 INFO ]: Interpolant automaton has 15 states [2018-06-24 21:12:44,494 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-24 21:12:44,494 INFO ]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-06-24 21:12:44,494 INFO ]: Start difference. First operand 68 states and 129 transitions. Second operand 15 states. [2018-06-24 21:12:45,568 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:45,568 INFO ]: Finished difference Result 113 states and 253 transitions. [2018-06-24 21:12:45,569 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-24 21:12:45,569 INFO ]: Start accepts. Automaton has 15 states. Word has length 23 [2018-06-24 21:12:45,569 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:45,572 INFO ]: With dead ends: 113 [2018-06-24 21:12:45,572 INFO ]: Without dead ends: 113 [2018-06-24 21:12:45,573 INFO ]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2018-06-24 21:12:45,573 INFO ]: Start minimizeSevpa. Operand 113 states. [2018-06-24 21:12:45,593 INFO ]: Finished minimizeSevpa. Reduced states from 113 to 73. [2018-06-24 21:12:45,593 INFO ]: Start removeUnreachable. Operand 73 states. [2018-06-24 21:12:45,595 INFO ]: Finished removeUnreachable. Reduced from 73 states to 73 states and 142 transitions. [2018-06-24 21:12:45,595 INFO ]: Start accepts. Automaton has 73 states and 142 transitions. Word has length 23 [2018-06-24 21:12:45,595 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:45,595 INFO ]: Abstraction has 73 states and 142 transitions. [2018-06-24 21:12:45,595 INFO ]: Interpolant automaton has 15 states. [2018-06-24 21:12:45,595 INFO ]: Start isEmpty. Operand 73 states and 142 transitions. [2018-06-24 21:12:45,597 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-24 21:12:45,597 INFO ]: Found error trace [2018-06-24 21:12:45,597 INFO ]: trace histogram [4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:45,598 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:45,598 INFO ]: Analyzing trace with hash 1316943667, now seen corresponding path program 2 times [2018-06-24 21:12:45,598 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:45,598 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:45,598 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:45,598 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:12:45,598 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:45,621 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:45,739 INFO ]: Checked inductivity of 38 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2018-06-24 21:12:45,739 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:45,739 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 [2018-06-24 21:12:45,753 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-24 21:12:45,788 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-24 21:12:45,788 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:45,791 INFO ]: Computing forward predicates... [2018-06-24 21:12:45,921 INFO ]: Checked inductivity of 38 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-06-24 21:12:45,956 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:45,956 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2018-06-24 21:12:45,957 INFO ]: Interpolant automaton has 14 states [2018-06-24 21:12:45,957 INFO ]: Constructing interpolant automaton starting with 14 interpolants. [2018-06-24 21:12:45,957 INFO ]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2018-06-24 21:12:45,957 INFO ]: Start difference. First operand 73 states and 142 transitions. Second operand 14 states. [2018-06-24 21:12:47,254 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:12:47,254 INFO ]: Finished difference Result 165 states and 366 transitions. [2018-06-24 21:12:47,257 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-24 21:12:47,257 INFO ]: Start accepts. Automaton has 14 states. Word has length 29 [2018-06-24 21:12:47,257 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:12:47,260 INFO ]: With dead ends: 165 [2018-06-24 21:12:47,260 INFO ]: Without dead ends: 101 [2018-06-24 21:12:47,260 INFO ]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2018-06-24 21:12:47,260 INFO ]: Start minimizeSevpa. Operand 101 states. [2018-06-24 21:12:47,275 INFO ]: Finished minimizeSevpa. Reduced states from 101 to 70. [2018-06-24 21:12:47,275 INFO ]: Start removeUnreachable. Operand 70 states. [2018-06-24 21:12:47,277 INFO ]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2018-06-24 21:12:47,277 INFO ]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 29 [2018-06-24 21:12:47,277 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:12:47,277 INFO ]: Abstraction has 70 states and 145 transitions. [2018-06-24 21:12:47,277 INFO ]: Interpolant automaton has 14 states. [2018-06-24 21:12:47,277 INFO ]: Start isEmpty. Operand 70 states and 145 transitions. [2018-06-24 21:12:47,280 INFO ]: Finished isEmpty. Found accepting run of length 36 [2018-06-24 21:12:47,280 INFO ]: Found error trace [2018-06-24 21:12:47,280 INFO ]: trace histogram [5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:12:47,280 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:12:47,280 INFO ]: Analyzing trace with hash -1442134509, now seen corresponding path program 3 times [2018-06-24 21:12:47,280 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:12:47,280 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:12:47,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:47,281 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:12:47,281 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:12:47,308 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:47,450 INFO ]: Checked inductivity of 61 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-06-24 21:12:47,450 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:12:47,450 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 [2018-06-24 21:12:47,469 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-24 21:12:47,542 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-06-24 21:12:47,542 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:12:47,547 INFO ]: Computing forward predicates... [2018-06-24 21:12:47,886 INFO ]: Checked inductivity of 61 backedges. 18 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-24 21:12:47,906 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:12:47,906 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 20] total 29 [2018-06-24 21:12:47,906 INFO ]: Interpolant automaton has 29 states [2018-06-24 21:12:47,907 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-24 21:12:47,907 INFO ]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2018-06-24 21:12:47,907 INFO ]: Start difference. First operand 70 states and 145 transitions. Second operand 29 states. [2018-06-24 21:12:51,288 WARN ]: Spent 213.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-06-24 21:12:56,348 WARN ]: Spent 481.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2018-06-24 21:13:02,936 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:13:02,936 INFO ]: Finished difference Result 486 states and 1416 transitions. [2018-06-24 21:13:02,936 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2018-06-24 21:13:02,936 INFO ]: Start accepts. Automaton has 29 states. Word has length 35 [2018-06-24 21:13:02,936 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:13:02,950 INFO ]: With dead ends: 486 [2018-06-24 21:13:02,950 INFO ]: Without dead ends: 471 [2018-06-24 21:13:02,960 INFO ]: 0 DeclaredPredicates, 214 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14213 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3577, Invalid=34643, Unknown=0, NotChecked=0, Total=38220 [2018-06-24 21:13:02,960 INFO ]: Start minimizeSevpa. Operand 471 states. [2018-06-24 21:13:03,117 INFO ]: Finished minimizeSevpa. Reduced states from 471 to 190. [2018-06-24 21:13:03,117 INFO ]: Start removeUnreachable. Operand 190 states. [2018-06-24 21:13:03,122 INFO ]: Finished removeUnreachable. Reduced from 190 states to 190 states and 359 transitions. [2018-06-24 21:13:03,122 INFO ]: Start accepts. Automaton has 190 states and 359 transitions. Word has length 35 [2018-06-24 21:13:03,122 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:13:03,122 INFO ]: Abstraction has 190 states and 359 transitions. [2018-06-24 21:13:03,122 INFO ]: Interpolant automaton has 29 states. [2018-06-24 21:13:03,122 INFO ]: Start isEmpty. Operand 190 states and 359 transitions. [2018-06-24 21:13:03,128 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-24 21:13:03,128 INFO ]: Found error trace [2018-06-24 21:13:03,128 INFO ]: trace histogram [6, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:13:03,128 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:13:03,129 INFO ]: Analyzing trace with hash 1057083129, now seen corresponding path program 4 times [2018-06-24 21:13:03,129 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:13:03,129 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:13:03,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:03,129 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:13:03,129 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:03,179 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:03,481 INFO ]: Checked inductivity of 92 backedges. 39 proven. 11 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2018-06-24 21:13:03,481 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:13:03,481 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 [2018-06-24 21:13:03,498 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-24 21:13:03,544 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-24 21:13:03,544 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:03,548 INFO ]: Computing forward predicates... [2018-06-24 21:13:03,694 INFO ]: Checked inductivity of 92 backedges. 50 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2018-06-24 21:13:03,714 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:13:03,714 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 15 [2018-06-24 21:13:03,714 INFO ]: Interpolant automaton has 15 states [2018-06-24 21:13:03,714 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-24 21:13:03,714 INFO ]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2018-06-24 21:13:03,714 INFO ]: Start difference. First operand 190 states and 359 transitions. Second operand 15 states. [2018-06-24 21:13:05,319 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:13:05,319 INFO ]: Finished difference Result 605 states and 1528 transitions. [2018-06-24 21:13:05,320 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-06-24 21:13:05,320 INFO ]: Start accepts. Automaton has 15 states. Word has length 41 [2018-06-24 21:13:05,320 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:13:05,327 INFO ]: With dead ends: 605 [2018-06-24 21:13:05,327 INFO ]: Without dead ends: 357 [2018-06-24 21:13:05,328 INFO ]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=548, Invalid=3112, Unknown=0, NotChecked=0, Total=3660 [2018-06-24 21:13:05,328 INFO ]: Start minimizeSevpa. Operand 357 states. [2018-06-24 21:13:05,365 INFO ]: Finished minimizeSevpa. Reduced states from 357 to 228. [2018-06-24 21:13:05,365 INFO ]: Start removeUnreachable. Operand 228 states. [2018-06-24 21:13:05,369 INFO ]: Finished removeUnreachable. Reduced from 228 states to 228 states and 426 transitions. [2018-06-24 21:13:05,370 INFO ]: Start accepts. Automaton has 228 states and 426 transitions. Word has length 41 [2018-06-24 21:13:05,370 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:13:05,370 INFO ]: Abstraction has 228 states and 426 transitions. [2018-06-24 21:13:05,370 INFO ]: Interpolant automaton has 15 states. [2018-06-24 21:13:05,370 INFO ]: Start isEmpty. Operand 228 states and 426 transitions. [2018-06-24 21:13:05,375 INFO ]: Finished isEmpty. Found accepting run of length 48 [2018-06-24 21:13:05,375 INFO ]: Found error trace [2018-06-24 21:13:05,375 INFO ]: trace histogram [7, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-24 21:13:05,375 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:13:05,375 INFO ]: Analyzing trace with hash -2050073514, now seen corresponding path program 5 times [2018-06-24 21:13:05,375 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:13:05,375 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:13:05,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:05,377 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:13:05,377 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:05,416 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:05,951 INFO ]: Checked inductivity of 131 backedges. 44 proven. 35 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2018-06-24 21:13:05,951 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:13:05,951 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 [2018-06-24 21:13:05,959 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-24 21:13:06,017 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-24 21:13:06,017 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:06,022 INFO ]: Computing forward predicates... [2018-06-24 21:13:06,371 INFO ]: Checked inductivity of 131 backedges. 58 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2018-06-24 21:13:06,391 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:13:06,391 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21] total 29 [2018-06-24 21:13:06,391 INFO ]: Interpolant automaton has 29 states [2018-06-24 21:13:06,391 INFO ]: Constructing interpolant automaton starting with 29 interpolants. [2018-06-24 21:13:06,391 INFO ]: CoverageRelationStatistics Valid=65, Invalid=747, Unknown=0, NotChecked=0, Total=812 [2018-06-24 21:13:06,392 INFO ]: Start difference. First operand 228 states and 426 transitions. Second operand 29 states. [2018-06-24 21:13:07,882 WARN ]: Spent 135.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2018-06-24 21:13:10,640 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:13:10,640 INFO ]: Finished difference Result 555 states and 1479 transitions. [2018-06-24 21:13:10,640 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-06-24 21:13:10,640 INFO ]: Start accepts. Automaton has 29 states. Word has length 47 [2018-06-24 21:13:10,640 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:13:10,652 INFO ]: With dead ends: 555 [2018-06-24 21:13:10,652 INFO ]: Without dead ends: 555 [2018-06-24 21:13:10,654 INFO ]: 0 DeclaredPredicates, 134 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1648 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=731, Invalid=6579, Unknown=0, NotChecked=0, Total=7310 [2018-06-24 21:13:10,655 INFO ]: Start minimizeSevpa. Operand 555 states. [2018-06-24 21:13:10,711 INFO ]: Finished minimizeSevpa. Reduced states from 555 to 292. [2018-06-24 21:13:10,711 INFO ]: Start removeUnreachable. Operand 292 states. [2018-06-24 21:13:10,715 INFO ]: Finished removeUnreachable. Reduced from 292 states to 292 states and 608 transitions. [2018-06-24 21:13:10,716 INFO ]: Start accepts. Automaton has 292 states and 608 transitions. Word has length 47 [2018-06-24 21:13:10,716 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:13:10,716 INFO ]: Abstraction has 292 states and 608 transitions. [2018-06-24 21:13:10,716 INFO ]: Interpolant automaton has 29 states. [2018-06-24 21:13:10,716 INFO ]: Start isEmpty. Operand 292 states and 608 transitions. [2018-06-24 21:13:10,722 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-24 21:13:10,722 INFO ]: Found error trace [2018-06-24 21:13:10,722 INFO ]: trace histogram [10, 8, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-06-24 21:13:10,723 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:13:10,723 INFO ]: Analyzing trace with hash 1695403423, now seen corresponding path program 6 times [2018-06-24 21:13:10,723 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:13:10,723 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:13:10,724 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:10,724 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:13:10,724 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:10,765 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:10,943 INFO ]: Checked inductivity of 274 backedges. 109 proven. 35 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2018-06-24 21:13:10,943 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:13:10,943 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 [2018-06-24 21:13:10,950 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-24 21:13:10,997 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2018-06-24 21:13:10,997 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:11,002 INFO ]: Computing forward predicates... [2018-06-24 21:13:11,022 INFO ]: Checked inductivity of 274 backedges. 156 proven. 4 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2018-06-24 21:13:11,057 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:13:11,057 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-06-24 21:13:11,057 INFO ]: Interpolant automaton has 8 states [2018-06-24 21:13:11,057 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-24 21:13:11,057 INFO ]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-06-24 21:13:11,058 INFO ]: Start difference. First operand 292 states and 608 transitions. Second operand 8 states. [2018-06-24 21:13:11,498 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:13:11,498 INFO ]: Finished difference Result 504 states and 1040 transitions. [2018-06-24 21:13:11,499 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-24 21:13:11,499 INFO ]: Start accepts. Automaton has 8 states. Word has length 65 [2018-06-24 21:13:11,499 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:13:11,509 INFO ]: With dead ends: 504 [2018-06-24 21:13:11,509 INFO ]: Without dead ends: 504 [2018-06-24 21:13:11,509 INFO ]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2018-06-24 21:13:11,509 INFO ]: Start minimizeSevpa. Operand 504 states. [2018-06-24 21:13:11,548 INFO ]: Finished minimizeSevpa. Reduced states from 504 to 331. [2018-06-24 21:13:11,548 INFO ]: Start removeUnreachable. Operand 331 states. [2018-06-24 21:13:11,552 INFO ]: Finished removeUnreachable. Reduced from 331 states to 331 states and 695 transitions. [2018-06-24 21:13:11,552 INFO ]: Start accepts. Automaton has 331 states and 695 transitions. Word has length 65 [2018-06-24 21:13:11,552 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:13:11,552 INFO ]: Abstraction has 331 states and 695 transitions. [2018-06-24 21:13:11,552 INFO ]: Interpolant automaton has 8 states. [2018-06-24 21:13:11,552 INFO ]: Start isEmpty. Operand 331 states and 695 transitions. [2018-06-24 21:13:11,559 INFO ]: Finished isEmpty. Found accepting run of length 60 [2018-06-24 21:13:11,559 INFO ]: Found error trace [2018-06-24 21:13:11,559 INFO ]: trace histogram [9, 7, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-06-24 21:13:11,559 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-24 21:13:11,560 INFO ]: Analyzing trace with hash -145639038, now seen corresponding path program 7 times [2018-06-24 21:13:11,560 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-24 21:13:11,560 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-24 21:13:11,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:11,561 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-24 21:13:11,561 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-24 21:13:11,591 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:11,848 INFO ]: Checked inductivity of 215 backedges. 89 proven. 42 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2018-06-24 21:13:11,848 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-24 21:13:11,848 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 [2018-06-24 21:13:11,854 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-24 21:13:11,914 INFO ]: Conjunction of SSA is unsat [2018-06-24 21:13:11,919 INFO ]: Computing forward predicates... [2018-06-24 21:13:12,144 INFO ]: Checked inductivity of 215 backedges. 99 proven. 49 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2018-06-24 21:13:12,166 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-24 21:13:12,166 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2018-06-24 21:13:12,166 INFO ]: Interpolant automaton has 24 states [2018-06-24 21:13:12,166 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-24 21:13:12,167 INFO ]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2018-06-24 21:13:12,167 INFO ]: Start difference. First operand 331 states and 695 transitions. Second operand 24 states. [2018-06-24 21:13:16,883 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-24 21:13:16,883 INFO ]: Finished difference Result 607 states and 1043 transitions. [2018-06-24 21:13:16,885 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-06-24 21:13:16,885 INFO ]: Start accepts. Automaton has 24 states. Word has length 59 [2018-06-24 21:13:16,885 INFO ]: Finished accepts. some prefix is accepted. [2018-06-24 21:13:16,885 INFO ]: With dead ends: 607 [2018-06-24 21:13:16,885 INFO ]: Without dead ends: 0 [2018-06-24 21:13:16,888 INFO ]: 0 DeclaredPredicates, 214 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4318 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1350, Invalid=12456, Unknown=0, NotChecked=0, Total=13806 [2018-06-24 21:13:16,888 INFO ]: Start minimizeSevpa. Operand 0 states. [2018-06-24 21:13:16,888 INFO ]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-06-24 21:13:16,889 INFO ]: Start removeUnreachable. Operand 0 states. [2018-06-24 21:13:16,889 INFO ]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-06-24 21:13:16,889 INFO ]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 59 [2018-06-24 21:13:16,889 INFO ]: Finished accepts. word is rejected. [2018-06-24 21:13:16,889 INFO ]: Abstraction has 0 states and 0 transitions. [2018-06-24 21:13:16,889 INFO ]: Interpolant automaton has 24 states. [2018-06-24 21:13:16,889 INFO ]: Start isEmpty. Operand 0 states and 0 transitions. [2018-06-24 21:13:16,889 INFO ]: Finished isEmpty. No accepting run. [2018-06-24 21:13:16,892 INFO ]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-06-24 21:13:16,893 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.06 09:13:16 BasicIcfg [2018-06-24 21:13:16,894 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-24 21:13:16,894 INFO ]: Toolchain (without parser) took 38552.82 ms. Allocated memory was 303.0 MB in the beginning and 836.2 MB in the end (delta: 533.2 MB). Free memory was 257.4 MB in the beginning and 494.3 MB in the end (delta: -236.9 MB). Peak memory consumption was 296.3 MB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,895 INFO ]: SmtParser took 0.05 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-24 21:13:16,895 INFO ]: ChcToBoogie took 82.64 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 254.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,896 INFO ]: Boogie Preprocessor took 40.88 ms. Allocated memory is still 303.0 MB. Free memory was 254.4 MB in the beginning and 253.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,896 INFO ]: RCFGBuilder took 431.00 ms. Allocated memory is still 303.0 MB. Free memory was 253.4 MB in the beginning and 240.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,897 INFO ]: BlockEncodingV2 took 152.84 ms. Allocated memory is still 303.0 MB. Free memory was 240.4 MB in the beginning and 233.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,897 INFO ]: TraceAbstraction took 37835.57 ms. Allocated memory was 303.0 MB in the beginning and 836.2 MB in the end (delta: 533.2 MB). Free memory was 233.5 MB in the beginning and 494.3 MB in the end (delta: -260.9 MB). Peak memory consumption was 272.3 MB. Max. memory is 3.6 GB. [2018-06-24 21:13:16,901 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.blockencoding: - StatisticsResult: Initial Icfg 22 locations, 32 edges - StatisticsResult: Encoded RCFG 15 locations, 24 edges * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.05 ms. Allocated memory is still 303.0 MB. Free memory is still 268.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 82.64 ms. Allocated memory is still 303.0 MB. Free memory was 256.4 MB in the beginning and 254.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 40.88 ms. Allocated memory is still 303.0 MB. Free memory was 254.4 MB in the beginning and 253.4 MB in the end (delta: 996.1 kB). Peak memory consumption was 996.1 kB. Max. memory is 3.6 GB. * RCFGBuilder took 431.00 ms. Allocated memory is still 303.0 MB. Free memory was 253.4 MB in the beginning and 240.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 3.6 GB. * BlockEncodingV2 took 152.84 ms. Allocated memory is still 303.0 MB. Free memory was 240.4 MB in the beginning and 233.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 37835.57 ms. Allocated memory was 303.0 MB in the beginning and 836.2 MB in the end (delta: 533.2 MB). Free memory was 233.5 MB in the beginning and 494.3 MB in the end (delta: -260.9 MB). Peak memory consumption was 272.3 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [UNKNOWN] : assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. SAFE Result, 37.7s OverallTime, 13 OverallIterations, 10 TraceHistogramMax, 31.8s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 824 SDtfs, 1387 SDslu, 3508 SDs, 0 SdLazy, 20848 SolverSat, 6637 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 17.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 966 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 571 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21667 ImplicationChecksByTransitivity, 14.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=331occurred in iteration=12, 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: 0.4s AutomataMinimizationTime, 13 MinimizatonAttempts, 985 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 691 NumberOfCodeBlocks, 656 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 668 ConstructedInterpolants, 0 QuantifiedInterpolants, 65542 SizeOfPredicates, 125 NumberOfNonLiveVariables, 2861 ConjunctsInSsa, 263 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 1385/1696 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/a-max.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-0-2018-06-24_21-13-16-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/a-max.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-GraphSizeCsvProvider-1-2018-06-24_21-13-16-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/a-max.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-Benchmark-0-2018-06-24_21-13-16-911.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/a-max.smt2_AutomizerCHC_Goto.epf_AutomizerCHC_wBE.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-24_21-13-16-911.csv Received shutdown request...