java -Xss1g -Xmx4000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCHC.xml --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv -s ../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf -i /storage/chc-comp/eldarica-misc/LIA/llreve/square_twice_safe_weaved.c-1.smt2 -------------------------------------------------------------------------------- This is Ultimate 0.1.23-8d74a04 [2018-06-22 11:04:19,065 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-06-22 11:04:19,067 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-06-22 11:04:19,080 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-06-22 11:04:19,080 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-06-22 11:04:19,081 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-06-22 11:04:19,082 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-06-22 11:04:19,086 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-06-22 11:04:19,088 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-06-22 11:04:19,089 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-06-22 11:04:19,089 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-06-22 11:04:19,091 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-06-22 11:04:19,092 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-06-22 11:04:19,093 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-06-22 11:04:19,093 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-06-22 11:04:19,094 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-06-22 11:04:19,098 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-06-22 11:04:19,107 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-06-22 11:04:19,111 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-06-22 11:04:19,112 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-06-22 11:04:19,113 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-06-22 11:04:19,115 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-06-22 11:04:19,115 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-06-22 11:04:19,115 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-06-22 11:04:19,116 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-06-22 11:04:19,121 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-06-22 11:04:19,121 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-06-22 11:04:19,122 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-06-22 11:04:19,123 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-06-22 11:04:19,123 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-06-22 11:04:19,125 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-06-22 11:04:19,126 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-06-22 11:04:19,126 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-06-22 11:04:19,127 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-06-22 11:04:19,127 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-06-22 11:04:19,128 INFO L98 SettingsManager]: Beginning loading settings from /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/chc/AutomizerCHC/AutomizerCHC_No_Goto.epf [2018-06-22 11:04:19,140 INFO L110 SettingsManager]: Loading preferences was successful [2018-06-22 11:04:19,141 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-06-22 11:04:19,141 INFO L131 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2018-06-22 11:04:19,141 INFO L133 SettingsManager]: * Logger pattern=[%d{ISO8601} %-5p]: %m%n [2018-06-22 11:04:19,142 INFO L131 SettingsManager]: Preferences of ChcToBoogie differ from their defaults: [2018-06-22 11:04:19,143 INFO L133 SettingsManager]: * Use one large procedure with gotos to replace tail recursive calls=false [2018-06-22 11:04:19,143 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-06-22 11:04:19,143 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-06-22 11:04:19,143 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-06-22 11:04:19,143 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-06-22 11:04:19,143 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:04:19,144 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-06-22 11:04:19,144 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-06-22 11:04:19,144 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-06-22 11:04:19,144 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-06-22 11:04:19,144 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-06-22 11:04:19,144 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-06-22 11:04:19,145 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-06-22 11:04:19,145 INFO L133 SettingsManager]: * Compute trace for counterexample result=false [2018-06-22 11:04:19,146 INFO L131 SettingsManager]: Preferences of SmtParser differ from their defaults: [2018-06-22 11:04:19,146 INFO L133 SettingsManager]: * Use TreeAutomizer as solver for the given file (assumes the file contains Horn clauses only).=true [2018-06-22 11:04:19,203 INFO ]: Repository-Root is: /tmp [2018-06-22 11:04:19,220 INFO ]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-06-22 11:04:19,224 INFO ]: [Toolchain 1]: Toolchain data selected. [2018-06-22 11:04:19,226 INFO ]: Initializing SmtParser... [2018-06-22 11:04:19,226 INFO ]: SmtParser initialized [2018-06-22 11:04:19,227 INFO ]: [Toolchain 1]: Parsing single file: /storage/chc-comp/eldarica-misc/LIA/llreve/square_twice_safe_weaved.c-1.smt2 [2018-06-22 11:04:19,228 INFO ]: Parsing .smt2 file as a set of Horn Clauses No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-06-22 11:04:19,322 INFO ]: Executing SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/square_twice_safe_weaved.c-1.smt2 unknown [2018-06-22 11:04:19,525 INFO ]: Succesfully executed SMT file /storage/chc-comp/eldarica-misc/LIA/llreve/square_twice_safe_weaved.c-1.smt2 [2018-06-22 11:04:19,530 INFO ]: ####################### [Toolchain 1] ####################### [2018-06-22 11:04:19,536 INFO ]: Walking toolchain with 4 elements. [2018-06-22 11:04:19,537 INFO ]: ------------------------ChcToBoogie---------------------------- [2018-06-22 11:04:19,537 INFO ]: Initializing ChcToBoogie... [2018-06-22 11:04:19,537 INFO ]: ChcToBoogie initialized [2018-06-22 11:04:19,541 INFO ]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,592 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19 Unit [2018-06-22 11:04:19,592 INFO ]: ------------------------ END ChcToBoogie---------------------------- [2018-06-22 11:04:19,593 INFO ]: ------------------------Boogie Preprocessor---------------------------- [2018-06-22 11:04:19,593 INFO ]: Initializing Boogie Preprocessor... [2018-06-22 11:04:19,593 INFO ]: Boogie Preprocessor initialized [2018-06-22 11:04:19,616 INFO ]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,617 INFO ]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,625 INFO ]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,625 INFO ]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,629 INFO ]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,630 INFO ]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,631 INFO ]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... [2018-06-22 11:04:19,634 INFO ]: ------------------------ END Boogie Preprocessor---------------------------- [2018-06-22 11:04:19,634 INFO ]: ------------------------RCFGBuilder---------------------------- [2018-06-22 11:04:19,634 INFO ]: Initializing RCFGBuilder... [2018-06-22 11:04:19,634 INFO ]: RCFGBuilder initialized [2018-06-22 11:04:19,635 INFO ]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (1/1) ... No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure False given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure False [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure False [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure inv_main26 given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure inv_main26 [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure inv_main26 [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure inv_main22 given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure inv_main22 [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure inv_main22 [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure inv_main13 given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure inv_main13 [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure inv_main13 [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure inv_main8 given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure inv_main8 [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure inv_main8 [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure inv_main3 given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure inv_main3 [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure inv_main3 [2018-06-22 11:04:19,650 INFO ]: Specification and implementation of procedure Ultimate.START given in one single declaration [2018-06-22 11:04:19,650 INFO ]: Found specification of procedure Ultimate.START [2018-06-22 11:04:19,650 INFO ]: Found implementation of procedure Ultimate.START Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-06-22 11:04:20,136 INFO ]: Using library mode [2018-06-22 11:04:20,136 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:04:20 BoogieIcfgContainer [2018-06-22 11:04:20,136 INFO ]: ------------------------ END RCFGBuilder---------------------------- [2018-06-22 11:04:20,137 INFO ]: ------------------------TraceAbstraction---------------------------- [2018-06-22 11:04:20,137 INFO ]: Initializing TraceAbstraction... [2018-06-22 11:04:20,140 INFO ]: TraceAbstraction initialized [2018-06-22 11:04:20,140 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.source.smtparser OTHER 22.06 11:04:19" (1/3) ... [2018-06-22 11:04:20,141 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ccc734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 22.06 11:04:20, skipping insertion in model container [2018-06-22 11:04:20,141 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 22.06 11:04:19" (2/3) ... [2018-06-22 11:04:20,142 INFO ]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75ccc734 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.06 11:04:20, skipping insertion in model container [2018-06-22 11:04:20,142 INFO ]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.06 11:04:20" (3/3) ... [2018-06-22 11:04:20,143 INFO ]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2018-06-22 11:04:20,153 INFO ]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-06-22 11:04:20,161 INFO ]: Appying trace abstraction to program that has 1 error locations. [2018-06-22 11:04:20,237 INFO ]: Using default assertion order modulation [2018-06-22 11:04:20,238 INFO ]: Interprodecural is true [2018-06-22 11:04:20,238 INFO ]: Hoare is false [2018-06-22 11:04:20,238 INFO ]: Compute interpolants for FPandBP [2018-06-22 11:04:20,238 INFO ]: Backedges is TWOTRACK [2018-06-22 11:04:20,238 INFO ]: Determinization is PREDICATE_ABSTRACTION [2018-06-22 11:04:20,238 INFO ]: Difference is false [2018-06-22 11:04:20,238 INFO ]: Minimize is MINIMIZE_SEVPA [2018-06-22 11:04:20,238 INFO ]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-06-22 11:04:20,259 INFO ]: Start isEmpty. Operand 31 states. [2018-06-22 11:04:20,284 INFO ]: Finished isEmpty. Found accepting run of length 26 [2018-06-22 11:04:20,284 INFO ]: Found error trace [2018-06-22 11:04:20,285 INFO ]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:20,286 INFO ]: === Iteration 1 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:20,292 INFO ]: Analyzing trace with hash -1667910855, now seen corresponding path program 1 times [2018-06-22 11:04:20,294 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:20,295 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:20,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:20,343 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:20,343 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:20,394 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:20,608 INFO ]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-06-22 11:04:20,613 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:04:20,613 INFO ]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-06-22 11:04:20,614 INFO ]: Interpolant automaton has 7 states [2018-06-22 11:04:20,626 INFO ]: Constructing interpolant automaton starting with 7 interpolants. [2018-06-22 11:04:20,626 INFO ]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-06-22 11:04:20,628 INFO ]: Start difference. First operand 31 states. Second operand 7 states. [2018-06-22 11:04:20,932 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:20,932 INFO ]: Finished difference Result 37 states and 44 transitions. [2018-06-22 11:04:20,933 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-06-22 11:04:20,934 INFO ]: Start accepts. Automaton has 7 states. Word has length 25 [2018-06-22 11:04:20,935 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:20,944 INFO ]: With dead ends: 37 [2018-06-22 11:04:20,944 INFO ]: Without dead ends: 35 [2018-06-22 11:04:20,947 INFO ]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:04:20,963 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:04:20,991 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 33. [2018-06-22 11:04:20,992 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 11:04:20,994 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2018-06-22 11:04:20,996 INFO ]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 25 [2018-06-22 11:04:20,996 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:20,996 INFO ]: Abstraction has 33 states and 39 transitions. [2018-06-22 11:04:20,996 INFO ]: Interpolant automaton has 7 states. [2018-06-22 11:04:20,996 INFO ]: Start isEmpty. Operand 33 states and 39 transitions. [2018-06-22 11:04:20,998 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:04:20,998 INFO ]: Found error trace [2018-06-22 11:04:20,999 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:20,999 INFO ]: === Iteration 2 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:20,999 INFO ]: Analyzing trace with hash -1399010, now seen corresponding path program 1 times [2018-06-22 11:04:20,999 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:20,999 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:21,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:21,000 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:21,000 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:21,016 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:21,347 INFO ]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:04:21,347 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:04:21,347 INFO ]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-06-22 11:04:21,349 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:04:21,349 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:04:21,350 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:04:21,350 INFO ]: Start difference. First operand 33 states and 39 transitions. Second operand 8 states. [2018-06-22 11:04:21,594 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:21,595 INFO ]: Finished difference Result 35 states and 41 transitions. [2018-06-22 11:04:21,595 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-06-22 11:04:21,595 INFO ]: Start accepts. Automaton has 8 states. Word has length 29 [2018-06-22 11:04:21,595 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:21,596 INFO ]: With dead ends: 35 [2018-06-22 11:04:21,596 INFO ]: Without dead ends: 33 [2018-06-22 11:04:21,597 INFO ]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:04:21,597 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 11:04:21,603 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-06-22 11:04:21,604 INFO ]: Start removeUnreachable. Operand 31 states. [2018-06-22 11:04:21,605 INFO ]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2018-06-22 11:04:21,605 INFO ]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 29 [2018-06-22 11:04:21,605 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:21,605 INFO ]: Abstraction has 31 states and 36 transitions. [2018-06-22 11:04:21,605 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:04:21,605 INFO ]: Start isEmpty. Operand 31 states and 36 transitions. [2018-06-22 11:04:21,606 INFO ]: Finished isEmpty. Found accepting run of length 30 [2018-06-22 11:04:21,606 INFO ]: Found error trace [2018-06-22 11:04:21,606 INFO ]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:21,607 INFO ]: === Iteration 3 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:21,607 INFO ]: Analyzing trace with hash 252253150, now seen corresponding path program 1 times [2018-06-22 11:04:21,607 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:21,607 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:21,608 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:21,608 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:21,608 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:21,619 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:21,896 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:04:21,896 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:21,896 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:21,926 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:21,948 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:21,956 INFO ]: Computing forward predicates... [2018-06-22 11:04:22,461 INFO ]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-06-22 11:04:22,483 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:22,483 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2018-06-22 11:04:22,483 INFO ]: Interpolant automaton has 15 states [2018-06-22 11:04:22,484 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 11:04:22,484 INFO ]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:04:22,484 INFO ]: Start difference. First operand 31 states and 36 transitions. Second operand 15 states. [2018-06-22 11:04:22,825 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:22,825 INFO ]: Finished difference Result 33 states and 38 transitions. [2018-06-22 11:04:22,825 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-06-22 11:04:22,825 INFO ]: Start accepts. Automaton has 15 states. Word has length 29 [2018-06-22 11:04:22,826 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:22,826 INFO ]: With dead ends: 33 [2018-06-22 11:04:22,826 INFO ]: Without dead ends: 33 [2018-06-22 11:04:22,827 INFO ]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:04:22,827 INFO ]: Start minimizeSevpa. Operand 33 states. [2018-06-22 11:04:22,833 INFO ]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-06-22 11:04:22,833 INFO ]: Start removeUnreachable. Operand 33 states. [2018-06-22 11:04:22,834 INFO ]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2018-06-22 11:04:22,834 INFO ]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2018-06-22 11:04:22,834 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:22,834 INFO ]: Abstraction has 33 states and 38 transitions. [2018-06-22 11:04:22,834 INFO ]: Interpolant automaton has 15 states. [2018-06-22 11:04:22,834 INFO ]: Start isEmpty. Operand 33 states and 38 transitions. [2018-06-22 11:04:22,837 INFO ]: Finished isEmpty. Found accepting run of length 34 [2018-06-22 11:04:22,837 INFO ]: Found error trace [2018-06-22 11:04:22,837 INFO ]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:22,838 INFO ]: === Iteration 4 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:22,838 INFO ]: Analyzing trace with hash -705960573, now seen corresponding path program 1 times [2018-06-22 11:04:22,838 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:22,838 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:22,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:22,839 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:22,839 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:22,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:22,956 INFO ]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-06-22 11:04:22,956 INFO ]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-06-22 11:04:22,956 INFO ]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-06-22 11:04:22,956 INFO ]: Interpolant automaton has 8 states [2018-06-22 11:04:22,957 INFO ]: Constructing interpolant automaton starting with 8 interpolants. [2018-06-22 11:04:22,957 INFO ]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-06-22 11:04:22,957 INFO ]: Start difference. First operand 33 states and 38 transitions. Second operand 8 states. [2018-06-22 11:04:23,103 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:23,103 INFO ]: Finished difference Result 41 states and 47 transitions. [2018-06-22 11:04:23,105 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-06-22 11:04:23,105 INFO ]: Start accepts. Automaton has 8 states. Word has length 33 [2018-06-22 11:04:23,105 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:23,106 INFO ]: With dead ends: 41 [2018-06-22 11:04:23,106 INFO ]: Without dead ends: 35 [2018-06-22 11:04:23,107 INFO ]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2018-06-22 11:04:23,107 INFO ]: Start minimizeSevpa. Operand 35 states. [2018-06-22 11:04:23,113 INFO ]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-06-22 11:04:23,113 INFO ]: Start removeUnreachable. Operand 35 states. [2018-06-22 11:04:23,114 INFO ]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2018-06-22 11:04:23,114 INFO ]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2018-06-22 11:04:23,115 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:23,115 INFO ]: Abstraction has 35 states and 40 transitions. [2018-06-22 11:04:23,115 INFO ]: Interpolant automaton has 8 states. [2018-06-22 11:04:23,115 INFO ]: Start isEmpty. Operand 35 states and 40 transitions. [2018-06-22 11:04:23,116 INFO ]: Finished isEmpty. Found accepting run of length 38 [2018-06-22 11:04:23,116 INFO ]: Found error trace [2018-06-22 11:04:23,116 INFO ]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:23,116 INFO ]: === Iteration 5 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:23,116 INFO ]: Analyzing trace with hash -1811431963, now seen corresponding path program 1 times [2018-06-22 11:04:23,116 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:23,116 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:23,117 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:23,117 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:23,117 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:23,135 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:23,458 INFO ]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:04:23,459 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:23,459 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:23,465 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:23,485 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:23,489 INFO ]: Computing forward predicates... [2018-06-22 11:04:23,782 INFO ]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-06-22 11:04:23,815 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:23,815 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2018-06-22 11:04:23,816 INFO ]: Interpolant automaton has 22 states [2018-06-22 11:04:23,816 INFO ]: Constructing interpolant automaton starting with 22 interpolants. [2018-06-22 11:04:23,816 INFO ]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:04:23,817 INFO ]: Start difference. First operand 35 states and 40 transitions. Second operand 22 states. [2018-06-22 11:04:24,418 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:24,418 INFO ]: Finished difference Result 43 states and 49 transitions. [2018-06-22 11:04:24,418 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 11:04:24,418 INFO ]: Start accepts. Automaton has 22 states. Word has length 37 [2018-06-22 11:04:24,419 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:24,420 INFO ]: With dead ends: 43 [2018-06-22 11:04:24,420 INFO ]: Without dead ends: 41 [2018-06-22 11:04:24,420 INFO ]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2018-06-22 11:04:24,421 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 11:04:24,426 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-06-22 11:04:24,426 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-22 11:04:24,427 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2018-06-22 11:04:24,427 INFO ]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 37 [2018-06-22 11:04:24,427 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:24,427 INFO ]: Abstraction has 39 states and 45 transitions. [2018-06-22 11:04:24,427 INFO ]: Interpolant automaton has 22 states. [2018-06-22 11:04:24,427 INFO ]: Start isEmpty. Operand 39 states and 45 transitions. [2018-06-22 11:04:24,433 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:04:24,433 INFO ]: Found error trace [2018-06-22 11:04:24,433 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:24,433 INFO ]: === Iteration 6 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:24,433 INFO ]: Analyzing trace with hash -778399798, now seen corresponding path program 2 times [2018-06-22 11:04:24,433 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:24,433 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:24,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:24,434 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:24,434 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:24,447 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:24,578 INFO ]: Checked inductivity of 16 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:04:24,579 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:24,579 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:24,584 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:04:24,617 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:04:24,617 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:24,620 INFO ]: Computing forward predicates... [2018-06-22 11:04:24,689 INFO ]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:04:24,709 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:24,709 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2018-06-22 11:04:24,709 INFO ]: Interpolant automaton has 15 states [2018-06-22 11:04:24,709 INFO ]: Constructing interpolant automaton starting with 15 interpolants. [2018-06-22 11:04:24,709 INFO ]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2018-06-22 11:04:24,709 INFO ]: Start difference. First operand 39 states and 45 transitions. Second operand 15 states. [2018-06-22 11:04:24,881 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:24,881 INFO ]: Finished difference Result 57 states and 65 transitions. [2018-06-22 11:04:24,881 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-06-22 11:04:24,881 INFO ]: Start accepts. Automaton has 15 states. Word has length 41 [2018-06-22 11:04:24,882 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:24,883 INFO ]: With dead ends: 57 [2018-06-22 11:04:24,883 INFO ]: Without dead ends: 53 [2018-06-22 11:04:24,883 INFO ]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:04:24,883 INFO ]: Start minimizeSevpa. Operand 53 states. [2018-06-22 11:04:24,891 INFO ]: Finished minimizeSevpa. Reduced states from 53 to 51. [2018-06-22 11:04:24,891 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-22 11:04:24,893 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2018-06-22 11:04:24,893 INFO ]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 41 [2018-06-22 11:04:24,893 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:24,893 INFO ]: Abstraction has 51 states and 59 transitions. [2018-06-22 11:04:24,893 INFO ]: Interpolant automaton has 15 states. [2018-06-22 11:04:24,893 INFO ]: Start isEmpty. Operand 51 states and 59 transitions. [2018-06-22 11:04:24,895 INFO ]: Finished isEmpty. Found accepting run of length 42 [2018-06-22 11:04:24,895 INFO ]: Found error trace [2018-06-22 11:04:24,895 INFO ]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:24,895 INFO ]: === Iteration 7 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:24,895 INFO ]: Analyzing trace with hash -447478646, now seen corresponding path program 3 times [2018-06-22 11:04:24,895 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:24,895 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:24,896 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:24,896 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:24,896 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:24,909 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:25,089 INFO ]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:04:25,089 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:25,089 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:25,096 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:04:25,119 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-06-22 11:04:25,119 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:25,122 INFO ]: Computing forward predicates... [2018-06-22 11:04:25,486 INFO ]: Checked inductivity of 16 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-06-22 11:04:25,507 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:25,507 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2018-06-22 11:04:25,508 INFO ]: Interpolant automaton has 20 states [2018-06-22 11:04:25,508 INFO ]: Constructing interpolant automaton starting with 20 interpolants. [2018-06-22 11:04:25,508 INFO ]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2018-06-22 11:04:25,508 INFO ]: Start difference. First operand 51 states and 59 transitions. Second operand 20 states. [2018-06-22 11:04:26,033 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:26,033 INFO ]: Finished difference Result 49 states and 55 transitions. [2018-06-22 11:04:26,034 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:04:26,034 INFO ]: Start accepts. Automaton has 20 states. Word has length 41 [2018-06-22 11:04:26,034 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:26,035 INFO ]: With dead ends: 49 [2018-06-22 11:04:26,035 INFO ]: Without dead ends: 45 [2018-06-22 11:04:26,037 INFO ]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 11:04:26,037 INFO ]: Start minimizeSevpa. Operand 45 states. [2018-06-22 11:04:26,042 INFO ]: Finished minimizeSevpa. Reduced states from 45 to 39. [2018-06-22 11:04:26,042 INFO ]: Start removeUnreachable. Operand 39 states. [2018-06-22 11:04:26,043 INFO ]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2018-06-22 11:04:26,043 INFO ]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 41 [2018-06-22 11:04:26,043 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:26,043 INFO ]: Abstraction has 39 states and 44 transitions. [2018-06-22 11:04:26,043 INFO ]: Interpolant automaton has 20 states. [2018-06-22 11:04:26,043 INFO ]: Start isEmpty. Operand 39 states and 44 transitions. [2018-06-22 11:04:26,044 INFO ]: Finished isEmpty. Found accepting run of length 46 [2018-06-22 11:04:26,044 INFO ]: Found error trace [2018-06-22 11:04:26,045 INFO ]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:26,045 INFO ]: === Iteration 8 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:26,045 INFO ]: Analyzing trace with hash 1892515884, now seen corresponding path program 4 times [2018-06-22 11:04:26,045 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:26,045 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:26,046 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:26,046 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:26,046 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:26,059 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:26,287 INFO ]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-06-22 11:04:26,287 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:26,287 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:26,301 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:04:26,326 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:04:26,326 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:26,329 INFO ]: Computing forward predicates... [2018-06-22 11:04:26,459 INFO ]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-06-22 11:04:26,484 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:26,484 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2018-06-22 11:04:26,484 INFO ]: Interpolant automaton has 18 states [2018-06-22 11:04:26,485 INFO ]: Constructing interpolant automaton starting with 18 interpolants. [2018-06-22 11:04:26,485 INFO ]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2018-06-22 11:04:26,485 INFO ]: Start difference. First operand 39 states and 44 transitions. Second operand 18 states. [2018-06-22 11:04:26,762 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:26,762 INFO ]: Finished difference Result 45 states and 50 transitions. [2018-06-22 11:04:26,762 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-06-22 11:04:26,762 INFO ]: Start accepts. Automaton has 18 states. Word has length 45 [2018-06-22 11:04:26,763 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:26,763 INFO ]: With dead ends: 45 [2018-06-22 11:04:26,763 INFO ]: Without dead ends: 41 [2018-06-22 11:04:26,764 INFO ]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2018-06-22 11:04:26,764 INFO ]: Start minimizeSevpa. Operand 41 states. [2018-06-22 11:04:26,768 INFO ]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-06-22 11:04:26,768 INFO ]: Start removeUnreachable. Operand 41 states. [2018-06-22 11:04:26,769 INFO ]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2018-06-22 11:04:26,769 INFO ]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 45 [2018-06-22 11:04:26,770 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:26,770 INFO ]: Abstraction has 41 states and 46 transitions. [2018-06-22 11:04:26,770 INFO ]: Interpolant automaton has 18 states. [2018-06-22 11:04:26,770 INFO ]: Start isEmpty. Operand 41 states and 46 transitions. [2018-06-22 11:04:26,771 INFO ]: Finished isEmpty. Found accepting run of length 50 [2018-06-22 11:04:26,771 INFO ]: Found error trace [2018-06-22 11:04:26,771 INFO ]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:26,771 INFO ]: === Iteration 9 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:26,772 INFO ]: Analyzing trace with hash -1340464367, now seen corresponding path program 5 times [2018-06-22 11:04:26,772 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:26,772 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:26,772 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:26,772 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:26,772 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:26,810 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:27,270 INFO ]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-06-22 11:04:27,270 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:27,270 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:27,277 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:04:27,311 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2018-06-22 11:04:27,311 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:27,316 INFO ]: Computing forward predicates... [2018-06-22 11:04:27,858 INFO ]: Checked inductivity of 30 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2018-06-22 11:04:27,880 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:27,880 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 28 [2018-06-22 11:04:27,881 INFO ]: Interpolant automaton has 28 states [2018-06-22 11:04:27,881 INFO ]: Constructing interpolant automaton starting with 28 interpolants. [2018-06-22 11:04:27,881 INFO ]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2018-06-22 11:04:27,882 INFO ]: Start difference. First operand 41 states and 46 transitions. Second operand 28 states. [2018-06-22 11:04:28,698 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:28,698 INFO ]: Finished difference Result 51 states and 57 transitions. [2018-06-22 11:04:28,698 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 11:04:28,698 INFO ]: Start accepts. Automaton has 28 states. Word has length 49 [2018-06-22 11:04:28,699 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:28,699 INFO ]: With dead ends: 51 [2018-06-22 11:04:28,700 INFO ]: Without dead ends: 49 [2018-06-22 11:04:28,700 INFO ]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2018-06-22 11:04:28,700 INFO ]: Start minimizeSevpa. Operand 49 states. [2018-06-22 11:04:28,709 INFO ]: Finished minimizeSevpa. Reduced states from 49 to 45. [2018-06-22 11:04:28,709 INFO ]: Start removeUnreachable. Operand 45 states. [2018-06-22 11:04:28,710 INFO ]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2018-06-22 11:04:28,710 INFO ]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 49 [2018-06-22 11:04:28,710 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:28,710 INFO ]: Abstraction has 45 states and 51 transitions. [2018-06-22 11:04:28,710 INFO ]: Interpolant automaton has 28 states. [2018-06-22 11:04:28,710 INFO ]: Start isEmpty. Operand 45 states and 51 transitions. [2018-06-22 11:04:28,711 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 11:04:28,711 INFO ]: Found error trace [2018-06-22 11:04:28,711 INFO ]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:28,711 INFO ]: === Iteration 10 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:28,712 INFO ]: Analyzing trace with hash -96423178, now seen corresponding path program 6 times [2018-06-22 11:04:28,712 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:28,712 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:28,712 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:28,712 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:28,712 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:28,723 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:28,855 INFO ]: Checked inductivity of 41 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:04:28,855 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:28,855 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) [2018-06-22 11:04:28,869 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:28,897 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-06-22 11:04:28,897 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:28,900 INFO ]: Computing forward predicates... [2018-06-22 11:04:29,203 INFO ]: Checked inductivity of 41 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:04:29,226 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:29,226 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2018-06-22 11:04:29,227 INFO ]: Interpolant automaton has 17 states [2018-06-22 11:04:29,227 INFO ]: Constructing interpolant automaton starting with 17 interpolants. [2018-06-22 11:04:29,227 INFO ]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-06-22 11:04:29,227 INFO ]: Start difference. First operand 45 states and 51 transitions. Second operand 17 states. [2018-06-22 11:04:29,391 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:29,391 INFO ]: Finished difference Result 69 states and 77 transitions. [2018-06-22 11:04:29,393 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:04:29,393 INFO ]: Start accepts. Automaton has 17 states. Word has length 53 [2018-06-22 11:04:29,394 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:29,395 INFO ]: With dead ends: 69 [2018-06-22 11:04:29,395 INFO ]: Without dead ends: 63 [2018-06-22 11:04:29,395 INFO ]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:04:29,396 INFO ]: Start minimizeSevpa. Operand 63 states. [2018-06-22 11:04:29,402 INFO ]: Finished minimizeSevpa. Reduced states from 63 to 61. [2018-06-22 11:04:29,403 INFO ]: Start removeUnreachable. Operand 61 states. [2018-06-22 11:04:29,404 INFO ]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2018-06-22 11:04:29,404 INFO ]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 53 [2018-06-22 11:04:29,404 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:29,404 INFO ]: Abstraction has 61 states and 69 transitions. [2018-06-22 11:04:29,404 INFO ]: Interpolant automaton has 17 states. [2018-06-22 11:04:29,404 INFO ]: Start isEmpty. Operand 61 states and 69 transitions. [2018-06-22 11:04:29,407 INFO ]: Finished isEmpty. Found accepting run of length 54 [2018-06-22 11:04:29,407 INFO ]: Found error trace [2018-06-22 11:04:29,407 INFO ]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:29,408 INFO ]: === Iteration 11 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:29,408 INFO ]: Analyzing trace with hash 1464676278, now seen corresponding path program 7 times [2018-06-22 11:04:29,408 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:29,408 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:29,408 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:29,408 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:29,408 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:29,419 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:29,590 INFO ]: Checked inductivity of 41 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:04:29,590 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:29,640 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:29,647 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:29,676 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:29,679 INFO ]: Computing forward predicates... [2018-06-22 11:04:29,858 INFO ]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2018-06-22 11:04:29,877 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:29,877 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2018-06-22 11:04:29,878 INFO ]: Interpolant automaton has 24 states [2018-06-22 11:04:29,878 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 11:04:29,878 INFO ]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2018-06-22 11:04:29,878 INFO ]: Start difference. First operand 61 states and 69 transitions. Second operand 24 states. [2018-06-22 11:04:30,205 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:30,205 INFO ]: Finished difference Result 67 states and 74 transitions. [2018-06-22 11:04:30,205 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-06-22 11:04:30,205 INFO ]: Start accepts. Automaton has 24 states. Word has length 53 [2018-06-22 11:04:30,205 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:30,206 INFO ]: With dead ends: 67 [2018-06-22 11:04:30,206 INFO ]: Without dead ends: 53 [2018-06-22 11:04:30,206 INFO ]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:04:30,207 INFO ]: Start minimizeSevpa. Operand 53 states. [2018-06-22 11:04:30,211 INFO ]: Finished minimizeSevpa. Reduced states from 53 to 45. [2018-06-22 11:04:30,211 INFO ]: Start removeUnreachable. Operand 45 states. [2018-06-22 11:04:30,211 INFO ]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2018-06-22 11:04:30,212 INFO ]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 53 [2018-06-22 11:04:30,212 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:30,212 INFO ]: Abstraction has 45 states and 50 transitions. [2018-06-22 11:04:30,212 INFO ]: Interpolant automaton has 24 states. [2018-06-22 11:04:30,212 INFO ]: Start isEmpty. Operand 45 states and 50 transitions. [2018-06-22 11:04:30,213 INFO ]: Finished isEmpty. Found accepting run of length 58 [2018-06-22 11:04:30,213 INFO ]: Found error trace [2018-06-22 11:04:30,213 INFO ]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:30,213 INFO ]: === Iteration 12 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:30,213 INFO ]: Analyzing trace with hash 706804184, now seen corresponding path program 8 times [2018-06-22 11:04:30,213 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:30,213 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:30,214 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:30,214 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:30,214 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:30,224 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:30,399 INFO ]: Checked inductivity of 52 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-06-22 11:04:30,399 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:30,399 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:30,408 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:04:30,459 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:04:30,459 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:30,462 INFO ]: Computing forward predicates... [2018-06-22 11:04:30,664 INFO ]: Checked inductivity of 52 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2018-06-22 11:04:30,690 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:30,690 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2018-06-22 11:04:30,690 INFO ]: Interpolant automaton has 25 states [2018-06-22 11:04:30,691 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 11:04:30,691 INFO ]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:04:30,691 INFO ]: Start difference. First operand 45 states and 50 transitions. Second operand 25 states. [2018-06-22 11:04:31,288 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:31,288 INFO ]: Finished difference Result 47 states and 52 transitions. [2018-06-22 11:04:31,291 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-06-22 11:04:31,291 INFO ]: Start accepts. Automaton has 25 states. Word has length 57 [2018-06-22 11:04:31,291 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:31,292 INFO ]: With dead ends: 47 [2018-06-22 11:04:31,292 INFO ]: Without dead ends: 47 [2018-06-22 11:04:31,293 INFO ]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2018-06-22 11:04:31,293 INFO ]: Start minimizeSevpa. Operand 47 states. [2018-06-22 11:04:31,299 INFO ]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-06-22 11:04:31,299 INFO ]: Start removeUnreachable. Operand 47 states. [2018-06-22 11:04:31,310 INFO ]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2018-06-22 11:04:31,310 INFO ]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 57 [2018-06-22 11:04:31,310 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:31,310 INFO ]: Abstraction has 47 states and 52 transitions. [2018-06-22 11:04:31,310 INFO ]: Interpolant automaton has 25 states. [2018-06-22 11:04:31,310 INFO ]: Start isEmpty. Operand 47 states and 52 transitions. [2018-06-22 11:04:31,311 INFO ]: Finished isEmpty. Found accepting run of length 62 [2018-06-22 11:04:31,311 INFO ]: Found error trace [2018-06-22 11:04:31,311 INFO ]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:31,312 INFO ]: === Iteration 13 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:31,312 INFO ]: Analyzing trace with hash 939737789, now seen corresponding path program 9 times [2018-06-22 11:04:31,312 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:31,312 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:31,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:31,312 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:31,312 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:31,343 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:31,667 INFO ]: Checked inductivity of 63 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2018-06-22 11:04:31,667 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:31,667 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:31,673 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:04:31,737 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-06-22 11:04:31,737 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:31,743 INFO ]: Computing forward predicates... [2018-06-22 11:04:32,584 INFO ]: Checked inductivity of 63 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-06-22 11:04:32,615 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:32,615 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24] total 37 [2018-06-22 11:04:32,616 INFO ]: Interpolant automaton has 37 states [2018-06-22 11:04:32,616 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 11:04:32,616 INFO ]: CoverageRelationStatistics Valid=78, Invalid=1254, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:04:32,617 INFO ]: Start difference. First operand 47 states and 52 transitions. Second operand 37 states. [2018-06-22 11:04:34,499 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:34,499 INFO ]: Finished difference Result 79 states and 87 transitions. [2018-06-22 11:04:34,499 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-06-22 11:04:34,499 INFO ]: Start accepts. Automaton has 37 states. Word has length 61 [2018-06-22 11:04:34,500 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:34,500 INFO ]: With dead ends: 79 [2018-06-22 11:04:34,500 INFO ]: Without dead ends: 75 [2018-06-22 11:04:34,502 INFO ]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=239, Invalid=3667, Unknown=0, NotChecked=0, Total=3906 [2018-06-22 11:04:34,502 INFO ]: Start minimizeSevpa. Operand 75 states. [2018-06-22 11:04:34,507 INFO ]: Finished minimizeSevpa. Reduced states from 75 to 51. [2018-06-22 11:04:34,507 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-22 11:04:34,508 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2018-06-22 11:04:34,508 INFO ]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 61 [2018-06-22 11:04:34,508 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:34,508 INFO ]: Abstraction has 51 states and 57 transitions. [2018-06-22 11:04:34,508 INFO ]: Interpolant automaton has 37 states. [2018-06-22 11:04:34,508 INFO ]: Start isEmpty. Operand 51 states and 57 transitions. [2018-06-22 11:04:34,509 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-22 11:04:34,509 INFO ]: Found error trace [2018-06-22 11:04:34,509 INFO ]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:34,509 INFO ]: === Iteration 14 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:34,509 INFO ]: Analyzing trace with hash -583307102, now seen corresponding path program 10 times [2018-06-22 11:04:34,509 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:34,509 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:34,510 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:34,510 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:34,510 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:34,525 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:34,652 INFO ]: Checked inductivity of 78 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-22 11:04:34,652 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:34,670 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:34,675 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:04:34,700 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:04:34,700 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:34,703 INFO ]: Computing forward predicates... [2018-06-22 11:04:34,818 INFO ]: Checked inductivity of 78 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-22 11:04:34,851 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:34,851 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2018-06-22 11:04:34,851 INFO ]: Interpolant automaton has 19 states [2018-06-22 11:04:34,852 INFO ]: Constructing interpolant automaton starting with 19 interpolants. [2018-06-22 11:04:34,852 INFO ]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2018-06-22 11:04:34,852 INFO ]: Start difference. First operand 51 states and 57 transitions. Second operand 19 states. [2018-06-22 11:04:35,219 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:35,219 INFO ]: Finished difference Result 81 states and 89 transitions. [2018-06-22 11:04:35,220 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:04:35,220 INFO ]: Start accepts. Automaton has 19 states. Word has length 65 [2018-06-22 11:04:35,220 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:35,221 INFO ]: With dead ends: 81 [2018-06-22 11:04:35,221 INFO ]: Without dead ends: 73 [2018-06-22 11:04:35,221 INFO ]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2018-06-22 11:04:35,221 INFO ]: Start minimizeSevpa. Operand 73 states. [2018-06-22 11:04:35,229 INFO ]: Finished minimizeSevpa. Reduced states from 73 to 71. [2018-06-22 11:04:35,229 INFO ]: Start removeUnreachable. Operand 71 states. [2018-06-22 11:04:35,232 INFO ]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2018-06-22 11:04:35,232 INFO ]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 65 [2018-06-22 11:04:35,232 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:35,232 INFO ]: Abstraction has 71 states and 79 transitions. [2018-06-22 11:04:35,232 INFO ]: Interpolant automaton has 19 states. [2018-06-22 11:04:35,233 INFO ]: Start isEmpty. Operand 71 states and 79 transitions. [2018-06-22 11:04:35,233 INFO ]: Finished isEmpty. Found accepting run of length 66 [2018-06-22 11:04:35,233 INFO ]: Found error trace [2018-06-22 11:04:35,233 INFO ]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:35,233 INFO ]: === Iteration 15 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:35,234 INFO ]: Analyzing trace with hash -1848445598, now seen corresponding path program 11 times [2018-06-22 11:04:35,234 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:35,234 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:35,234 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:35,234 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:35,234 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:35,262 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:36,211 INFO ]: Checked inductivity of 78 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-22 11:04:36,211 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:36,211 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:36,218 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:04:36,244 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-06-22 11:04:36,244 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:36,248 INFO ]: Computing forward predicates... [2018-06-22 11:04:36,392 INFO ]: Checked inductivity of 78 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2018-06-22 11:04:36,412 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:36,412 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2018-06-22 11:04:36,413 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:04:36,413 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:04:36,414 INFO ]: CoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:04:36,414 INFO ]: Start difference. First operand 71 states and 79 transitions. Second operand 27 states. [2018-06-22 11:04:37,244 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:37,245 INFO ]: Finished difference Result 79 states and 86 transitions. [2018-06-22 11:04:37,245 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-06-22 11:04:37,245 INFO ]: Start accepts. Automaton has 27 states. Word has length 65 [2018-06-22 11:04:37,245 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:37,246 INFO ]: With dead ends: 79 [2018-06-22 11:04:37,246 INFO ]: Without dead ends: 61 [2018-06-22 11:04:37,247 INFO ]: 0 DeclaredPredicates, 99 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:04:37,247 INFO ]: Start minimizeSevpa. Operand 61 states. [2018-06-22 11:04:37,251 INFO ]: Finished minimizeSevpa. Reduced states from 61 to 51. [2018-06-22 11:04:37,251 INFO ]: Start removeUnreachable. Operand 51 states. [2018-06-22 11:04:37,252 INFO ]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2018-06-22 11:04:37,252 INFO ]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 65 [2018-06-22 11:04:37,252 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:37,252 INFO ]: Abstraction has 51 states and 56 transitions. [2018-06-22 11:04:37,252 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:04:37,252 INFO ]: Start isEmpty. Operand 51 states and 56 transitions. [2018-06-22 11:04:37,253 INFO ]: Finished isEmpty. Found accepting run of length 70 [2018-06-22 11:04:37,253 INFO ]: Found error trace [2018-06-22 11:04:37,253 INFO ]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:37,253 INFO ]: === Iteration 16 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:37,253 INFO ]: Analyzing trace with hash 247705092, now seen corresponding path program 12 times [2018-06-22 11:04:37,253 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:37,253 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:37,254 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:37,254 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:37,254 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:37,271 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:37,438 INFO ]: Checked inductivity of 93 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-06-22 11:04:37,438 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:37,438 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:37,444 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:04:37,539 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-06-22 11:04:37,539 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:37,543 INFO ]: Computing forward predicates... [2018-06-22 11:04:37,843 INFO ]: Checked inductivity of 93 backedges. 20 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2018-06-22 11:04:37,865 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:37,865 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 24 [2018-06-22 11:04:37,866 INFO ]: Interpolant automaton has 24 states [2018-06-22 11:04:37,866 INFO ]: Constructing interpolant automaton starting with 24 interpolants. [2018-06-22 11:04:37,866 INFO ]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2018-06-22 11:04:37,866 INFO ]: Start difference. First operand 51 states and 56 transitions. Second operand 24 states. [2018-06-22 11:04:38,397 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:38,397 INFO ]: Finished difference Result 61 states and 66 transitions. [2018-06-22 11:04:38,397 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-06-22 11:04:38,397 INFO ]: Start accepts. Automaton has 24 states. Word has length 69 [2018-06-22 11:04:38,397 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:38,398 INFO ]: With dead ends: 61 [2018-06-22 11:04:38,398 INFO ]: Without dead ends: 53 [2018-06-22 11:04:38,398 INFO ]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:04:38,398 INFO ]: Start minimizeSevpa. Operand 53 states. [2018-06-22 11:04:38,402 INFO ]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-06-22 11:04:38,402 INFO ]: Start removeUnreachable. Operand 53 states. [2018-06-22 11:04:38,403 INFO ]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2018-06-22 11:04:38,403 INFO ]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 69 [2018-06-22 11:04:38,403 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:38,403 INFO ]: Abstraction has 53 states and 58 transitions. [2018-06-22 11:04:38,403 INFO ]: Interpolant automaton has 24 states. [2018-06-22 11:04:38,403 INFO ]: Start isEmpty. Operand 53 states and 58 transitions. [2018-06-22 11:04:38,404 INFO ]: Finished isEmpty. Found accepting run of length 74 [2018-06-22 11:04:38,404 INFO ]: Found error trace [2018-06-22 11:04:38,404 INFO ]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:38,404 INFO ]: === Iteration 17 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:38,404 INFO ]: Analyzing trace with hash -1089372951, now seen corresponding path program 13 times [2018-06-22 11:04:38,404 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:38,404 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:38,405 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:38,405 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:38,405 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:38,426 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:38,843 INFO ]: Checked inductivity of 108 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2018-06-22 11:04:38,843 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:38,843 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:38,849 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:38,878 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:38,881 INFO ]: Computing forward predicates... [2018-06-22 11:04:39,569 INFO ]: Checked inductivity of 108 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-06-22 11:04:39,594 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:39,594 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2018-06-22 11:04:39,594 INFO ]: Interpolant automaton has 36 states [2018-06-22 11:04:39,594 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 11:04:39,595 INFO ]: CoverageRelationStatistics Valid=76, Invalid=1184, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 11:04:39,595 INFO ]: Start difference. First operand 53 states and 58 transitions. Second operand 36 states. [2018-06-22 11:04:40,605 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:40,605 INFO ]: Finished difference Result 67 states and 73 transitions. [2018-06-22 11:04:40,605 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 11:04:40,605 INFO ]: Start accepts. Automaton has 36 states. Word has length 73 [2018-06-22 11:04:40,605 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:40,606 INFO ]: With dead ends: 67 [2018-06-22 11:04:40,606 INFO ]: Without dead ends: 65 [2018-06-22 11:04:40,607 INFO ]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=171, Invalid=2279, Unknown=0, NotChecked=0, Total=2450 [2018-06-22 11:04:40,607 INFO ]: Start minimizeSevpa. Operand 65 states. [2018-06-22 11:04:40,610 INFO ]: Finished minimizeSevpa. Reduced states from 65 to 57. [2018-06-22 11:04:40,610 INFO ]: Start removeUnreachable. Operand 57 states. [2018-06-22 11:04:40,611 INFO ]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2018-06-22 11:04:40,611 INFO ]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 73 [2018-06-22 11:04:40,611 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:40,611 INFO ]: Abstraction has 57 states and 63 transitions. [2018-06-22 11:04:40,611 INFO ]: Interpolant automaton has 36 states. [2018-06-22 11:04:40,611 INFO ]: Start isEmpty. Operand 57 states and 63 transitions. [2018-06-22 11:04:40,612 INFO ]: Finished isEmpty. Found accepting run of length 78 [2018-06-22 11:04:40,612 INFO ]: Found error trace [2018-06-22 11:04:40,612 INFO ]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:40,612 INFO ]: === Iteration 18 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:40,612 INFO ]: Analyzing trace with hash 604055758, now seen corresponding path program 14 times [2018-06-22 11:04:40,612 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:40,612 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:40,613 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:40,613 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:40,613 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:40,624 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:40,877 INFO ]: Checked inductivity of 127 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-22 11:04:40,877 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:40,877 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:40,883 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:04:40,913 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:04:40,913 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:40,916 INFO ]: Computing forward predicates... [2018-06-22 11:04:40,971 INFO ]: Checked inductivity of 127 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-22 11:04:40,991 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:40,991 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2018-06-22 11:04:40,991 INFO ]: Interpolant automaton has 21 states [2018-06-22 11:04:40,992 INFO ]: Constructing interpolant automaton starting with 21 interpolants. [2018-06-22 11:04:40,992 INFO ]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2018-06-22 11:04:40,992 INFO ]: Start difference. First operand 57 states and 63 transitions. Second operand 21 states. [2018-06-22 11:04:41,246 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:41,246 INFO ]: Finished difference Result 93 states and 101 transitions. [2018-06-22 11:04:41,246 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-06-22 11:04:41,246 INFO ]: Start accepts. Automaton has 21 states. Word has length 77 [2018-06-22 11:04:41,247 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:41,247 INFO ]: With dead ends: 93 [2018-06-22 11:04:41,247 INFO ]: Without dead ends: 83 [2018-06-22 11:04:41,248 INFO ]: 0 DeclaredPredicates, 116 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 11:04:41,248 INFO ]: Start minimizeSevpa. Operand 83 states. [2018-06-22 11:04:41,256 INFO ]: Finished minimizeSevpa. Reduced states from 83 to 81. [2018-06-22 11:04:41,256 INFO ]: Start removeUnreachable. Operand 81 states. [2018-06-22 11:04:41,257 INFO ]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2018-06-22 11:04:41,257 INFO ]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 77 [2018-06-22 11:04:41,257 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:41,257 INFO ]: Abstraction has 81 states and 89 transitions. [2018-06-22 11:04:41,257 INFO ]: Interpolant automaton has 21 states. [2018-06-22 11:04:41,257 INFO ]: Start isEmpty. Operand 81 states and 89 transitions. [2018-06-22 11:04:41,258 INFO ]: Finished isEmpty. Found accepting run of length 78 [2018-06-22 11:04:41,258 INFO ]: Found error trace [2018-06-22 11:04:41,258 INFO ]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:41,259 INFO ]: === Iteration 19 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:41,259 INFO ]: Analyzing trace with hash 1205581198, now seen corresponding path program 15 times [2018-06-22 11:04:41,259 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:41,259 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:41,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:41,259 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:41,259 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:41,270 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:41,478 INFO ]: Checked inductivity of 127 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-22 11:04:41,478 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:41,478 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:41,484 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:04:41,519 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-06-22 11:04:41,519 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:41,522 INFO ]: Computing forward predicates... [2018-06-22 11:04:41,756 INFO ]: Checked inductivity of 127 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2018-06-22 11:04:41,776 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:41,776 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 32 [2018-06-22 11:04:41,776 INFO ]: Interpolant automaton has 32 states [2018-06-22 11:04:41,776 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 11:04:41,776 INFO ]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:04:41,776 INFO ]: Start difference. First operand 81 states and 89 transitions. Second operand 32 states. [2018-06-22 11:04:42,582 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:42,582 INFO ]: Finished difference Result 79 states and 85 transitions. [2018-06-22 11:04:42,582 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-06-22 11:04:42,582 INFO ]: Start accepts. Automaton has 32 states. Word has length 77 [2018-06-22 11:04:42,582 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:42,583 INFO ]: With dead ends: 79 [2018-06-22 11:04:42,583 INFO ]: Without dead ends: 69 [2018-06-22 11:04:42,584 INFO ]: 0 DeclaredPredicates, 131 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=2868, Unknown=0, NotChecked=0, Total=3192 [2018-06-22 11:04:42,584 INFO ]: Start minimizeSevpa. Operand 69 states. [2018-06-22 11:04:42,590 INFO ]: Finished minimizeSevpa. Reduced states from 69 to 57. [2018-06-22 11:04:42,590 INFO ]: Start removeUnreachable. Operand 57 states. [2018-06-22 11:04:42,590 INFO ]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2018-06-22 11:04:42,590 INFO ]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 77 [2018-06-22 11:04:42,591 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:42,591 INFO ]: Abstraction has 57 states and 62 transitions. [2018-06-22 11:04:42,591 INFO ]: Interpolant automaton has 32 states. [2018-06-22 11:04:42,591 INFO ]: Start isEmpty. Operand 57 states and 62 transitions. [2018-06-22 11:04:42,591 INFO ]: Finished isEmpty. Found accepting run of length 82 [2018-06-22 11:04:42,592 INFO ]: Found error trace [2018-06-22 11:04:42,592 INFO ]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:42,592 INFO ]: === Iteration 20 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:42,592 INFO ]: Analyzing trace with hash -1468793680, now seen corresponding path program 16 times [2018-06-22 11:04:42,592 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:42,592 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:42,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:42,592 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:42,592 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:42,609 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:43,136 INFO ]: Checked inductivity of 146 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-06-22 11:04:43,136 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:43,136 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:43,142 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:04:43,174 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:04:43,174 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:43,179 INFO ]: Computing forward predicates... [2018-06-22 11:04:43,368 INFO ]: Checked inductivity of 146 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2018-06-22 11:04:43,394 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:43,394 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 27 [2018-06-22 11:04:43,394 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:04:43,394 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:04:43,395 INFO ]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:04:43,395 INFO ]: Start difference. First operand 57 states and 62 transitions. Second operand 27 states. [2018-06-22 11:04:43,671 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:43,671 INFO ]: Finished difference Result 69 states and 74 transitions. [2018-06-22 11:04:43,671 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-06-22 11:04:43,671 INFO ]: Start accepts. Automaton has 27 states. Word has length 81 [2018-06-22 11:04:43,672 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:43,672 INFO ]: With dead ends: 69 [2018-06-22 11:04:43,672 INFO ]: Without dead ends: 59 [2018-06-22 11:04:43,673 INFO ]: 0 DeclaredPredicates, 119 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:04:43,673 INFO ]: Start minimizeSevpa. Operand 59 states. [2018-06-22 11:04:43,676 INFO ]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-06-22 11:04:43,676 INFO ]: Start removeUnreachable. Operand 59 states. [2018-06-22 11:04:43,676 INFO ]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2018-06-22 11:04:43,676 INFO ]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 81 [2018-06-22 11:04:43,677 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:43,677 INFO ]: Abstraction has 59 states and 64 transitions. [2018-06-22 11:04:43,677 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:04:43,677 INFO ]: Start isEmpty. Operand 59 states and 64 transitions. [2018-06-22 11:04:43,677 INFO ]: Finished isEmpty. Found accepting run of length 86 [2018-06-22 11:04:43,677 INFO ]: Found error trace [2018-06-22 11:04:43,677 INFO ]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:43,677 INFO ]: === Iteration 21 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:43,678 INFO ]: Analyzing trace with hash -1028968043, now seen corresponding path program 17 times [2018-06-22 11:04:43,678 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:43,678 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:43,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:43,678 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:43,678 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:43,693 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:44,324 INFO ]: Checked inductivity of 165 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2018-06-22 11:04:44,324 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:44,324 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:44,329 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:04:44,370 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-06-22 11:04:44,370 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:44,377 INFO ]: Computing forward predicates... [2018-06-22 11:04:46,069 INFO ]: Checked inductivity of 165 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2018-06-22 11:04:46,093 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:46,093 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 40 [2018-06-22 11:04:46,093 INFO ]: Interpolant automaton has 40 states [2018-06-22 11:04:46,093 INFO ]: Constructing interpolant automaton starting with 40 interpolants. [2018-06-22 11:04:46,093 INFO ]: CoverageRelationStatistics Valid=84, Invalid=1476, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 11:04:46,093 INFO ]: Start difference. First operand 59 states and 64 transitions. Second operand 40 states. [2018-06-22 11:04:47,835 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:47,835 INFO ]: Finished difference Result 75 states and 81 transitions. [2018-06-22 11:04:47,835 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-22 11:04:47,835 INFO ]: Start accepts. Automaton has 40 states. Word has length 85 [2018-06-22 11:04:47,836 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:47,836 INFO ]: With dead ends: 75 [2018-06-22 11:04:47,836 INFO ]: Without dead ends: 73 [2018-06-22 11:04:47,837 INFO ]: 0 DeclaredPredicates, 134 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2018-06-22 11:04:47,837 INFO ]: Start minimizeSevpa. Operand 73 states. [2018-06-22 11:04:47,839 INFO ]: Finished minimizeSevpa. Reduced states from 73 to 63. [2018-06-22 11:04:47,840 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-22 11:04:47,843 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2018-06-22 11:04:47,843 INFO ]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 85 [2018-06-22 11:04:47,843 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:47,843 INFO ]: Abstraction has 63 states and 69 transitions. [2018-06-22 11:04:47,843 INFO ]: Interpolant automaton has 40 states. [2018-06-22 11:04:47,843 INFO ]: Start isEmpty. Operand 63 states and 69 transitions. [2018-06-22 11:04:47,844 INFO ]: Finished isEmpty. Found accepting run of length 90 [2018-06-22 11:04:47,844 INFO ]: Found error trace [2018-06-22 11:04:47,844 INFO ]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:47,844 INFO ]: === Iteration 22 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:47,844 INFO ]: Analyzing trace with hash -601867398, now seen corresponding path program 18 times [2018-06-22 11:04:47,844 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:47,844 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:47,845 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:47,845 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:47,845 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:47,862 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:48,340 INFO ]: Checked inductivity of 188 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-22 11:04:48,340 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:48,340 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:48,345 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:04:48,387 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-06-22 11:04:48,387 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:48,391 INFO ]: Computing forward predicates... [2018-06-22 11:04:48,485 INFO ]: Checked inductivity of 188 backedges. 42 proven. 35 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-22 11:04:48,504 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:48,504 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 23 [2018-06-22 11:04:48,505 INFO ]: Interpolant automaton has 23 states [2018-06-22 11:04:48,505 INFO ]: Constructing interpolant automaton starting with 23 interpolants. [2018-06-22 11:04:48,505 INFO ]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2018-06-22 11:04:48,505 INFO ]: Start difference. First operand 63 states and 69 transitions. Second operand 23 states. [2018-06-22 11:04:48,942 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:48,942 INFO ]: Finished difference Result 105 states and 113 transitions. [2018-06-22 11:04:48,945 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-06-22 11:04:48,945 INFO ]: Start accepts. Automaton has 23 states. Word has length 89 [2018-06-22 11:04:48,945 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:48,946 INFO ]: With dead ends: 105 [2018-06-22 11:04:48,946 INFO ]: Without dead ends: 93 [2018-06-22 11:04:48,946 INFO ]: 0 DeclaredPredicates, 135 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:04:48,946 INFO ]: Start minimizeSevpa. Operand 93 states. [2018-06-22 11:04:48,951 INFO ]: Finished minimizeSevpa. Reduced states from 93 to 91. [2018-06-22 11:04:48,951 INFO ]: Start removeUnreachable. Operand 91 states. [2018-06-22 11:04:48,952 INFO ]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2018-06-22 11:04:48,952 INFO ]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 89 [2018-06-22 11:04:48,952 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:48,952 INFO ]: Abstraction has 91 states and 99 transitions. [2018-06-22 11:04:48,952 INFO ]: Interpolant automaton has 23 states. [2018-06-22 11:04:48,952 INFO ]: Start isEmpty. Operand 91 states and 99 transitions. [2018-06-22 11:04:48,953 INFO ]: Finished isEmpty. Found accepting run of length 90 [2018-06-22 11:04:48,953 INFO ]: Found error trace [2018-06-22 11:04:48,953 INFO ]: trace histogram [7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:48,953 INFO ]: === Iteration 23 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:48,953 INFO ]: Analyzing trace with hash -797585350, now seen corresponding path program 19 times [2018-06-22 11:04:48,953 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:48,953 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:48,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:48,954 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:48,954 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:48,965 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:49,272 INFO ]: Checked inductivity of 188 backedges. 20 proven. 57 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-22 11:04:49,272 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:49,272 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:49,278 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:49,322 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:49,325 INFO ]: Computing forward predicates... [2018-06-22 11:04:49,510 INFO ]: Checked inductivity of 188 backedges. 30 proven. 47 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2018-06-22 11:04:49,530 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:49,530 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 33 [2018-06-22 11:04:49,530 INFO ]: Interpolant automaton has 33 states [2018-06-22 11:04:49,530 INFO ]: Constructing interpolant automaton starting with 33 interpolants. [2018-06-22 11:04:49,530 INFO ]: CoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2018-06-22 11:04:49,531 INFO ]: Start difference. First operand 91 states and 99 transitions. Second operand 33 states. [2018-06-22 11:04:49,915 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:49,915 INFO ]: Finished difference Result 103 states and 110 transitions. [2018-06-22 11:04:49,915 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-22 11:04:49,915 INFO ]: Start accepts. Automaton has 33 states. Word has length 89 [2018-06-22 11:04:49,915 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:49,916 INFO ]: With dead ends: 103 [2018-06-22 11:04:49,916 INFO ]: Without dead ends: 77 [2018-06-22 11:04:49,916 INFO ]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=307, Invalid=1855, Unknown=0, NotChecked=0, Total=2162 [2018-06-22 11:04:49,916 INFO ]: Start minimizeSevpa. Operand 77 states. [2018-06-22 11:04:49,920 INFO ]: Finished minimizeSevpa. Reduced states from 77 to 63. [2018-06-22 11:04:49,920 INFO ]: Start removeUnreachable. Operand 63 states. [2018-06-22 11:04:49,920 INFO ]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2018-06-22 11:04:49,920 INFO ]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 89 [2018-06-22 11:04:49,920 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:49,920 INFO ]: Abstraction has 63 states and 68 transitions. [2018-06-22 11:04:49,920 INFO ]: Interpolant automaton has 33 states. [2018-06-22 11:04:49,921 INFO ]: Start isEmpty. Operand 63 states and 68 transitions. [2018-06-22 11:04:49,921 INFO ]: Finished isEmpty. Found accepting run of length 94 [2018-06-22 11:04:49,921 INFO ]: Found error trace [2018-06-22 11:04:49,921 INFO ]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:49,921 INFO ]: === Iteration 24 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:49,921 INFO ]: Analyzing trace with hash -821541412, now seen corresponding path program 20 times [2018-06-22 11:04:49,921 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:49,921 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:49,922 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:49,922 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:49,922 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:49,934 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:50,495 INFO ]: Checked inductivity of 211 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2018-06-22 11:04:50,495 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:50,495 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:50,500 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:04:50,536 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:04:50,536 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:50,539 INFO ]: Computing forward predicates... [2018-06-22 11:04:50,896 INFO ]: Checked inductivity of 211 backedges. 30 proven. 47 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2018-06-22 11:04:50,916 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:50,916 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2018-06-22 11:04:50,917 INFO ]: Interpolant automaton has 37 states [2018-06-22 11:04:50,917 INFO ]: Constructing interpolant automaton starting with 37 interpolants. [2018-06-22 11:04:50,917 INFO ]: CoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2018-06-22 11:04:50,917 INFO ]: Start difference. First operand 63 states and 68 transitions. Second operand 37 states. [2018-06-22 11:04:51,423 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:51,423 INFO ]: Finished difference Result 65 states and 70 transitions. [2018-06-22 11:04:51,423 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-06-22 11:04:51,423 INFO ]: Start accepts. Automaton has 37 states. Word has length 93 [2018-06-22 11:04:51,423 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:51,423 INFO ]: With dead ends: 65 [2018-06-22 11:04:51,423 INFO ]: Without dead ends: 65 [2018-06-22 11:04:51,424 INFO ]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=2355, Unknown=0, NotChecked=0, Total=2652 [2018-06-22 11:04:51,424 INFO ]: Start minimizeSevpa. Operand 65 states. [2018-06-22 11:04:51,426 INFO ]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-06-22 11:04:51,427 INFO ]: Start removeUnreachable. Operand 65 states. [2018-06-22 11:04:51,427 INFO ]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2018-06-22 11:04:51,427 INFO ]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 93 [2018-06-22 11:04:51,427 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:51,427 INFO ]: Abstraction has 65 states and 70 transitions. [2018-06-22 11:04:51,427 INFO ]: Interpolant automaton has 37 states. [2018-06-22 11:04:51,427 INFO ]: Start isEmpty. Operand 65 states and 70 transitions. [2018-06-22 11:04:51,428 INFO ]: Finished isEmpty. Found accepting run of length 98 [2018-06-22 11:04:51,428 INFO ]: Found error trace [2018-06-22 11:04:51,428 INFO ]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:51,428 INFO ]: === Iteration 25 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:51,428 INFO ]: Analyzing trace with hash -934362943, now seen corresponding path program 21 times [2018-06-22 11:04:51,428 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:51,428 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:51,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:51,429 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:51,429 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:51,451 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:52,075 INFO ]: Checked inductivity of 234 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-06-22 11:04:52,075 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:52,075 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:52,081 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:04:52,141 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-06-22 11:04:52,141 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:52,146 INFO ]: Computing forward predicates... [2018-06-22 11:04:52,596 INFO ]: Checked inductivity of 234 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-06-22 11:04:52,630 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:52,630 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 32 [2018-06-22 11:04:52,630 INFO ]: Interpolant automaton has 32 states [2018-06-22 11:04:52,630 INFO ]: Constructing interpolant automaton starting with 32 interpolants. [2018-06-22 11:04:52,630 INFO ]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2018-06-22 11:04:52,630 INFO ]: Start difference. First operand 65 states and 70 transitions. Second operand 32 states. [2018-06-22 11:04:53,752 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:53,752 INFO ]: Finished difference Result 83 states and 89 transitions. [2018-06-22 11:04:53,753 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:04:53,753 INFO ]: Start accepts. Automaton has 32 states. Word has length 97 [2018-06-22 11:04:53,753 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:53,754 INFO ]: With dead ends: 83 [2018-06-22 11:04:53,754 INFO ]: Without dead ends: 81 [2018-06-22 11:04:53,754 INFO ]: 0 DeclaredPredicates, 148 GetRequests, 77 SyntacticMatches, 28 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=131, Invalid=1849, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 11:04:53,754 INFO ]: Start minimizeSevpa. Operand 81 states. [2018-06-22 11:04:53,757 INFO ]: Finished minimizeSevpa. Reduced states from 81 to 69. [2018-06-22 11:04:53,757 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-22 11:04:53,758 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2018-06-22 11:04:53,758 INFO ]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 97 [2018-06-22 11:04:53,758 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:53,758 INFO ]: Abstraction has 69 states and 75 transitions. [2018-06-22 11:04:53,758 INFO ]: Interpolant automaton has 32 states. [2018-06-22 11:04:53,758 INFO ]: Start isEmpty. Operand 69 states and 75 transitions. [2018-06-22 11:04:53,758 INFO ]: Finished isEmpty. Found accepting run of length 102 [2018-06-22 11:04:53,759 INFO ]: Found error trace [2018-06-22 11:04:53,759 INFO ]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:53,759 INFO ]: === Iteration 26 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:53,759 INFO ]: Analyzing trace with hash 356452518, now seen corresponding path program 22 times [2018-06-22 11:04:53,759 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:53,759 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:53,759 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:53,759 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:53,759 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:53,772 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:54,069 INFO ]: Checked inductivity of 261 backedges. 44 proven. 60 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-22 11:04:54,069 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:54,069 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:54,075 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:04:54,111 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:04:54,111 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:54,115 INFO ]: Computing forward predicates... [2018-06-22 11:04:54,207 INFO ]: Checked inductivity of 261 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-22 11:04:54,227 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:54,227 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2018-06-22 11:04:54,227 INFO ]: Interpolant automaton has 25 states [2018-06-22 11:04:54,227 INFO ]: Constructing interpolant automaton starting with 25 interpolants. [2018-06-22 11:04:54,227 INFO ]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2018-06-22 11:04:54,227 INFO ]: Start difference. First operand 69 states and 75 transitions. Second operand 25 states. [2018-06-22 11:04:54,574 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:54,574 INFO ]: Finished difference Result 117 states and 125 transitions. [2018-06-22 11:04:54,574 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:04:54,574 INFO ]: Start accepts. Automaton has 25 states. Word has length 101 [2018-06-22 11:04:54,575 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:54,575 INFO ]: With dead ends: 117 [2018-06-22 11:04:54,575 INFO ]: Without dead ends: 103 [2018-06-22 11:04:54,576 INFO ]: 0 DeclaredPredicates, 154 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1384, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 11:04:54,576 INFO ]: Start minimizeSevpa. Operand 103 states. [2018-06-22 11:04:54,582 INFO ]: Finished minimizeSevpa. Reduced states from 103 to 101. [2018-06-22 11:04:54,582 INFO ]: Start removeUnreachable. Operand 101 states. [2018-06-22 11:04:54,582 INFO ]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2018-06-22 11:04:54,582 INFO ]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 101 [2018-06-22 11:04:54,583 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:54,583 INFO ]: Abstraction has 101 states and 109 transitions. [2018-06-22 11:04:54,583 INFO ]: Interpolant automaton has 25 states. [2018-06-22 11:04:54,583 INFO ]: Start isEmpty. Operand 101 states and 109 transitions. [2018-06-22 11:04:54,583 INFO ]: Finished isEmpty. Found accepting run of length 102 [2018-06-22 11:04:54,583 INFO ]: Found error trace [2018-06-22 11:04:54,584 INFO ]: trace histogram [8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:54,584 INFO ]: === Iteration 27 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:54,584 INFO ]: Analyzing trace with hash -993548954, now seen corresponding path program 23 times [2018-06-22 11:04:54,584 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:54,584 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:54,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:54,584 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:54,584 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:54,596 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:54,990 INFO ]: Checked inductivity of 261 backedges. 30 proven. 74 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-22 11:04:54,990 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:54,990 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:54,996 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:04:55,040 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-06-22 11:04:55,040 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:55,044 INFO ]: Computing forward predicates... [2018-06-22 11:04:55,347 INFO ]: Checked inductivity of 261 backedges. 42 proven. 62 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2018-06-22 11:04:55,366 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:55,366 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2018-06-22 11:04:55,367 INFO ]: Interpolant automaton has 36 states [2018-06-22 11:04:55,367 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 11:04:55,367 INFO ]: CoverageRelationStatistics Valid=173, Invalid=1087, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 11:04:55,367 INFO ]: Start difference. First operand 101 states and 109 transitions. Second operand 36 states. [2018-06-22 11:04:56,081 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:56,081 INFO ]: Finished difference Result 115 states and 122 transitions. [2018-06-22 11:04:56,082 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-06-22 11:04:56,083 INFO ]: Start accepts. Automaton has 36 states. Word has length 101 [2018-06-22 11:04:56,083 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:56,084 INFO ]: With dead ends: 115 [2018-06-22 11:04:56,084 INFO ]: Without dead ends: 85 [2018-06-22 11:04:56,084 INFO ]: 0 DeclaredPredicates, 156 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2018-06-22 11:04:56,085 INFO ]: Start minimizeSevpa. Operand 85 states. [2018-06-22 11:04:56,090 INFO ]: Finished minimizeSevpa. Reduced states from 85 to 69. [2018-06-22 11:04:56,090 INFO ]: Start removeUnreachable. Operand 69 states. [2018-06-22 11:04:56,090 INFO ]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2018-06-22 11:04:56,090 INFO ]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 101 [2018-06-22 11:04:56,091 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:56,091 INFO ]: Abstraction has 69 states and 74 transitions. [2018-06-22 11:04:56,091 INFO ]: Interpolant automaton has 36 states. [2018-06-22 11:04:56,091 INFO ]: Start isEmpty. Operand 69 states and 74 transitions. [2018-06-22 11:04:56,091 INFO ]: Finished isEmpty. Found accepting run of length 106 [2018-06-22 11:04:56,091 INFO ]: Found error trace [2018-06-22 11:04:56,091 INFO ]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:56,091 INFO ]: === Iteration 28 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:56,091 INFO ]: Analyzing trace with hash -965809784, now seen corresponding path program 24 times [2018-06-22 11:04:56,091 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:56,092 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:56,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:56,093 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:56,093 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:56,106 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:56,733 INFO ]: Checked inductivity of 288 backedges. 44 proven. 60 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-06-22 11:04:56,733 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:56,733 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:56,739 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:04:56,783 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2018-06-22 11:04:56,783 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:56,788 INFO ]: Computing forward predicates... [2018-06-22 11:04:57,135 INFO ]: Checked inductivity of 288 backedges. 42 proven. 62 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2018-06-22 11:04:57,155 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:57,155 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2018-06-22 11:04:57,155 INFO ]: Interpolant automaton has 41 states [2018-06-22 11:04:57,155 INFO ]: Constructing interpolant automaton starting with 41 interpolants. [2018-06-22 11:04:57,156 INFO ]: CoverageRelationStatistics Valid=161, Invalid=1479, Unknown=0, NotChecked=0, Total=1640 [2018-06-22 11:04:57,156 INFO ]: Start difference. First operand 69 states and 74 transitions. Second operand 41 states. [2018-06-22 11:04:57,640 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:04:57,641 INFO ]: Finished difference Result 71 states and 76 transitions. [2018-06-22 11:04:57,641 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-06-22 11:04:57,641 INFO ]: Start accepts. Automaton has 41 states. Word has length 105 [2018-06-22 11:04:57,641 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:04:57,641 INFO ]: With dead ends: 71 [2018-06-22 11:04:57,641 INFO ]: Without dead ends: 71 [2018-06-22 11:04:57,642 INFO ]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=371, Invalid=2935, Unknown=0, NotChecked=0, Total=3306 [2018-06-22 11:04:57,642 INFO ]: Start minimizeSevpa. Operand 71 states. [2018-06-22 11:04:57,644 INFO ]: Finished minimizeSevpa. Reduced states from 71 to 71. [2018-06-22 11:04:57,644 INFO ]: Start removeUnreachable. Operand 71 states. [2018-06-22 11:04:57,645 INFO ]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2018-06-22 11:04:57,645 INFO ]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 105 [2018-06-22 11:04:57,645 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:04:57,645 INFO ]: Abstraction has 71 states and 76 transitions. [2018-06-22 11:04:57,645 INFO ]: Interpolant automaton has 41 states. [2018-06-22 11:04:57,645 INFO ]: Start isEmpty. Operand 71 states and 76 transitions. [2018-06-22 11:04:57,646 INFO ]: Finished isEmpty. Found accepting run of length 110 [2018-06-22 11:04:57,646 INFO ]: Found error trace [2018-06-22 11:04:57,646 INFO ]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:04:57,646 INFO ]: === Iteration 29 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:04:57,646 INFO ]: Analyzing trace with hash -74282387, now seen corresponding path program 25 times [2018-06-22 11:04:57,646 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:04:57,646 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:04:57,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:57,647 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:04:57,647 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:04:57,665 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:58,138 INFO ]: Checked inductivity of 315 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2018-06-22 11:04:58,138 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:04:58,138 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:04:58,146 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:04:58,206 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:04:58,214 INFO ]: Computing forward predicates... [2018-06-22 11:04:59,650 INFO ]: Checked inductivity of 315 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2018-06-22 11:04:59,670 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:04:59,670 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2018-06-22 11:04:59,670 INFO ]: Interpolant automaton has 48 states [2018-06-22 11:04:59,670 INFO ]: Constructing interpolant automaton starting with 48 interpolants. [2018-06-22 11:04:59,670 INFO ]: CoverageRelationStatistics Valid=100, Invalid=2156, Unknown=0, NotChecked=0, Total=2256 [2018-06-22 11:04:59,671 INFO ]: Start difference. First operand 71 states and 76 transitions. Second operand 48 states. [2018-06-22 11:05:01,568 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:01,568 INFO ]: Finished difference Result 91 states and 97 transitions. [2018-06-22 11:05:01,568 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-06-22 11:05:01,568 INFO ]: Start accepts. Automaton has 48 states. Word has length 109 [2018-06-22 11:05:01,568 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:01,568 INFO ]: With dead ends: 91 [2018-06-22 11:05:01,569 INFO ]: Without dead ends: 89 [2018-06-22 11:05:01,569 INFO ]: 0 DeclaredPredicates, 172 GetRequests, 94 SyntacticMatches, 12 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2018-06-22 11:05:01,569 INFO ]: Start minimizeSevpa. Operand 89 states. [2018-06-22 11:05:01,575 INFO ]: Finished minimizeSevpa. Reduced states from 89 to 75. [2018-06-22 11:05:01,575 INFO ]: Start removeUnreachable. Operand 75 states. [2018-06-22 11:05:01,575 INFO ]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2018-06-22 11:05:01,575 INFO ]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 109 [2018-06-22 11:05:01,576 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:01,576 INFO ]: Abstraction has 75 states and 81 transitions. [2018-06-22 11:05:01,576 INFO ]: Interpolant automaton has 48 states. [2018-06-22 11:05:01,576 INFO ]: Start isEmpty. Operand 75 states and 81 transitions. [2018-06-22 11:05:01,576 INFO ]: Finished isEmpty. Found accepting run of length 114 [2018-06-22 11:05:01,576 INFO ]: Found error trace [2018-06-22 11:05:01,576 INFO ]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:01,576 INFO ]: === Iteration 30 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:01,576 INFO ]: Analyzing trace with hash -14946222, now seen corresponding path program 26 times [2018-06-22 11:05:01,576 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:01,576 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:01,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:01,580 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:01,580 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:01,599 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:01,885 INFO ]: Checked inductivity of 346 backedges. 58 proven. 77 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-06-22 11:05:01,885 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:01,885 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:01,902 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:01,957 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:01,957 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:01,963 INFO ]: Computing forward predicates... [2018-06-22 11:05:02,310 INFO ]: Checked inductivity of 346 backedges. 72 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-06-22 11:05:02,343 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:02,343 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2018-06-22 11:05:02,344 INFO ]: Interpolant automaton has 27 states [2018-06-22 11:05:02,344 INFO ]: Constructing interpolant automaton starting with 27 interpolants. [2018-06-22 11:05:02,344 INFO ]: CoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2018-06-22 11:05:02,344 INFO ]: Start difference. First operand 75 states and 81 transitions. Second operand 27 states. [2018-06-22 11:05:02,865 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:02,865 INFO ]: Finished difference Result 129 states and 137 transitions. [2018-06-22 11:05:02,865 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-06-22 11:05:02,865 INFO ]: Start accepts. Automaton has 27 states. Word has length 113 [2018-06-22 11:05:02,866 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:02,866 INFO ]: With dead ends: 129 [2018-06-22 11:05:02,866 INFO ]: Without dead ends: 113 [2018-06-22 11:05:02,866 INFO ]: 0 DeclaredPredicates, 173 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=1668, Unknown=0, NotChecked=0, Total=1980 [2018-06-22 11:05:02,867 INFO ]: Start minimizeSevpa. Operand 113 states. [2018-06-22 11:05:02,871 INFO ]: Finished minimizeSevpa. Reduced states from 113 to 111. [2018-06-22 11:05:02,871 INFO ]: Start removeUnreachable. Operand 111 states. [2018-06-22 11:05:02,872 INFO ]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2018-06-22 11:05:02,872 INFO ]: Start accepts. Automaton has 111 states and 119 transitions. Word has length 113 [2018-06-22 11:05:02,872 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:02,872 INFO ]: Abstraction has 111 states and 119 transitions. [2018-06-22 11:05:02,872 INFO ]: Interpolant automaton has 27 states. [2018-06-22 11:05:02,872 INFO ]: Start isEmpty. Operand 111 states and 119 transitions. [2018-06-22 11:05:02,873 INFO ]: Finished isEmpty. Found accepting run of length 114 [2018-06-22 11:05:02,873 INFO ]: Found error trace [2018-06-22 11:05:02,873 INFO ]: trace histogram [9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:02,873 INFO ]: === Iteration 31 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:02,873 INFO ]: Analyzing trace with hash 504337682, now seen corresponding path program 27 times [2018-06-22 11:05:02,873 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:02,873 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:02,874 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:02,874 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:02,874 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:02,890 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:03,983 INFO ]: Checked inductivity of 346 backedges. 42 proven. 93 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-06-22 11:05:03,984 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:03,984 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:03,989 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-06-22 11:05:04,043 INFO ]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-06-22 11:05:04,043 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:04,047 INFO ]: Computing forward predicates... [2018-06-22 11:05:04,470 INFO ]: Checked inductivity of 346 backedges. 72 proven. 63 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2018-06-22 11:05:04,495 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:04,495 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22] total 44 [2018-06-22 11:05:04,495 INFO ]: Interpolant automaton has 44 states [2018-06-22 11:05:04,495 INFO ]: Constructing interpolant automaton starting with 44 interpolants. [2018-06-22 11:05:04,495 INFO ]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2018-06-22 11:05:04,495 INFO ]: Start difference. First operand 111 states and 119 transitions. Second operand 44 states. [2018-06-22 11:05:05,567 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:05,567 INFO ]: Finished difference Result 109 states and 115 transitions. [2018-06-22 11:05:05,567 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-06-22 11:05:05,567 INFO ]: Start accepts. Automaton has 44 states. Word has length 113 [2018-06-22 11:05:05,567 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:05,567 INFO ]: With dead ends: 109 [2018-06-22 11:05:05,567 INFO ]: Without dead ends: 93 [2018-06-22 11:05:05,568 INFO ]: 0 DeclaredPredicates, 194 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=657, Invalid=5823, Unknown=0, NotChecked=0, Total=6480 [2018-06-22 11:05:05,568 INFO ]: Start minimizeSevpa. Operand 93 states. [2018-06-22 11:05:05,572 INFO ]: Finished minimizeSevpa. Reduced states from 93 to 75. [2018-06-22 11:05:05,572 INFO ]: Start removeUnreachable. Operand 75 states. [2018-06-22 11:05:05,572 INFO ]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-06-22 11:05:05,572 INFO ]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 113 [2018-06-22 11:05:05,572 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:05,572 INFO ]: Abstraction has 75 states and 80 transitions. [2018-06-22 11:05:05,572 INFO ]: Interpolant automaton has 44 states. [2018-06-22 11:05:05,572 INFO ]: Start isEmpty. Operand 75 states and 80 transitions. [2018-06-22 11:05:05,573 INFO ]: Finished isEmpty. Found accepting run of length 118 [2018-06-22 11:05:05,573 INFO ]: Found error trace [2018-06-22 11:05:05,573 INFO ]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:05,573 INFO ]: === Iteration 32 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:05,573 INFO ]: Analyzing trace with hash -592558156, now seen corresponding path program 28 times [2018-06-22 11:05:05,573 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:05,573 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:05,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:05,575 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:05,575 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:05,587 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:05,948 INFO ]: Checked inductivity of 377 backedges. 58 proven. 77 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-06-22 11:05:05,948 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:05,948 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:05,954 INFO ]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-06-22 11:05:05,999 INFO ]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-06-22 11:05:05,999 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:06,005 INFO ]: Computing forward predicates... [2018-06-22 11:05:07,753 INFO ]: Checked inductivity of 377 backedges. 72 proven. 63 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2018-06-22 11:05:07,777 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:07,777 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 36 [2018-06-22 11:05:07,777 INFO ]: Interpolant automaton has 36 states [2018-06-22 11:05:07,777 INFO ]: Constructing interpolant automaton starting with 36 interpolants. [2018-06-22 11:05:07,777 INFO ]: CoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2018-06-22 11:05:07,777 INFO ]: Start difference. First operand 75 states and 80 transitions. Second operand 36 states. [2018-06-22 11:05:08,729 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:08,729 INFO ]: Finished difference Result 93 states and 98 transitions. [2018-06-22 11:05:08,730 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-06-22 11:05:08,730 INFO ]: Start accepts. Automaton has 36 states. Word has length 117 [2018-06-22 11:05:08,730 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:08,730 INFO ]: With dead ends: 93 [2018-06-22 11:05:08,730 INFO ]: Without dead ends: 77 [2018-06-22 11:05:08,731 INFO ]: 0 DeclaredPredicates, 176 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2018-06-22 11:05:08,731 INFO ]: Start minimizeSevpa. Operand 77 states. [2018-06-22 11:05:08,734 INFO ]: Finished minimizeSevpa. Reduced states from 77 to 77. [2018-06-22 11:05:08,734 INFO ]: Start removeUnreachable. Operand 77 states. [2018-06-22 11:05:08,734 INFO ]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2018-06-22 11:05:08,734 INFO ]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 117 [2018-06-22 11:05:08,735 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:08,735 INFO ]: Abstraction has 77 states and 82 transitions. [2018-06-22 11:05:08,735 INFO ]: Interpolant automaton has 36 states. [2018-06-22 11:05:08,735 INFO ]: Start isEmpty. Operand 77 states and 82 transitions. [2018-06-22 11:05:08,735 INFO ]: Finished isEmpty. Found accepting run of length 122 [2018-06-22 11:05:08,735 INFO ]: Found error trace [2018-06-22 11:05:08,735 INFO ]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:08,735 INFO ]: === Iteration 33 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:08,736 INFO ]: Analyzing trace with hash 1277488793, now seen corresponding path program 29 times [2018-06-22 11:05:08,736 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:08,736 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:08,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:08,736 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:08,736 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:08,759 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:09,342 INFO ]: Checked inductivity of 408 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2018-06-22 11:05:09,342 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:09,342 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:09,351 INFO ]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-06-22 11:05:09,409 INFO ]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-06-22 11:05:09,409 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:09,418 INFO ]: Computing forward predicates... [2018-06-22 11:05:11,137 INFO ]: Checked inductivity of 408 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2018-06-22 11:05:11,170 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:11,170 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2018-06-22 11:05:11,171 INFO ]: Interpolant automaton has 52 states [2018-06-22 11:05:11,171 INFO ]: Constructing interpolant automaton starting with 52 interpolants. [2018-06-22 11:05:11,171 INFO ]: CoverageRelationStatistics Valid=108, Invalid=2544, Unknown=0, NotChecked=0, Total=2652 [2018-06-22 11:05:11,171 INFO ]: Start difference. First operand 77 states and 82 transitions. Second operand 52 states. [2018-06-22 11:05:13,764 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:13,764 INFO ]: Finished difference Result 99 states and 105 transitions. [2018-06-22 11:05:13,764 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-06-22 11:05:13,764 INFO ]: Start accepts. Automaton has 52 states. Word has length 121 [2018-06-22 11:05:13,764 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:13,765 INFO ]: With dead ends: 99 [2018-06-22 11:05:13,765 INFO ]: Without dead ends: 97 [2018-06-22 11:05:13,765 INFO ]: 0 DeclaredPredicates, 191 GetRequests, 105 SyntacticMatches, 14 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=267, Invalid=5135, Unknown=0, NotChecked=0, Total=5402 [2018-06-22 11:05:13,766 INFO ]: Start minimizeSevpa. Operand 97 states. [2018-06-22 11:05:13,769 INFO ]: Finished minimizeSevpa. Reduced states from 97 to 81. [2018-06-22 11:05:13,769 INFO ]: Start removeUnreachable. Operand 81 states. [2018-06-22 11:05:13,769 INFO ]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2018-06-22 11:05:13,770 INFO ]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 121 [2018-06-22 11:05:13,770 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:13,770 INFO ]: Abstraction has 81 states and 87 transitions. [2018-06-22 11:05:13,770 INFO ]: Interpolant automaton has 52 states. [2018-06-22 11:05:13,770 INFO ]: Start isEmpty. Operand 81 states and 87 transitions. [2018-06-22 11:05:13,771 INFO ]: Finished isEmpty. Found accepting run of length 126 [2018-06-22 11:05:13,771 INFO ]: Found error trace [2018-06-22 11:05:13,771 INFO ]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:13,771 INFO ]: === Iteration 34 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:13,771 INFO ]: Analyzing trace with hash -2020781442, now seen corresponding path program 30 times [2018-06-22 11:05:13,771 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:13,771 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:13,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:13,774 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:13,774 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:13,788 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:14,069 INFO ]: Checked inductivity of 443 backedges. 74 proven. 96 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-06-22 11:05:14,069 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:14,069 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:14,075 INFO ]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-06-22 11:05:14,130 INFO ]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-06-22 11:05:14,130 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:14,136 INFO ]: Computing forward predicates... [2018-06-22 11:05:14,454 INFO ]: Checked inductivity of 443 backedges. 90 proven. 80 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-06-22 11:05:14,473 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:14,473 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2018-06-22 11:05:14,473 INFO ]: Interpolant automaton has 40 states [2018-06-22 11:05:14,474 INFO ]: Constructing interpolant automaton starting with 40 interpolants. [2018-06-22 11:05:14,474 INFO ]: CoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2018-06-22 11:05:14,474 INFO ]: Start difference. First operand 81 states and 87 transitions. Second operand 40 states. [2018-06-22 11:05:15,440 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:15,440 INFO ]: Finished difference Result 137 states and 145 transitions. [2018-06-22 11:05:15,441 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-06-22 11:05:15,441 INFO ]: Start accepts. Automaton has 40 states. Word has length 125 [2018-06-22 11:05:15,441 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:15,442 INFO ]: With dead ends: 137 [2018-06-22 11:05:15,442 INFO ]: Without dead ends: 119 [2018-06-22 11:05:15,443 INFO ]: 0 DeclaredPredicates, 213 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=699, Invalid=5781, Unknown=0, NotChecked=0, Total=6480 [2018-06-22 11:05:15,443 INFO ]: Start minimizeSevpa. Operand 119 states. [2018-06-22 11:05:15,448 INFO ]: Finished minimizeSevpa. Reduced states from 119 to 119. [2018-06-22 11:05:15,448 INFO ]: Start removeUnreachable. Operand 119 states. [2018-06-22 11:05:15,452 INFO ]: Finished removeUnreachable. Reduced from 119 states to 119 states and 126 transitions. [2018-06-22 11:05:15,452 INFO ]: Start accepts. Automaton has 119 states and 126 transitions. Word has length 125 [2018-06-22 11:05:15,452 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:15,452 INFO ]: Abstraction has 119 states and 126 transitions. [2018-06-22 11:05:15,452 INFO ]: Interpolant automaton has 40 states. [2018-06-22 11:05:15,452 INFO ]: Start isEmpty. Operand 119 states and 126 transitions. [2018-06-22 11:05:15,453 INFO ]: Finished isEmpty. Found accepting run of length 126 [2018-06-22 11:05:15,453 INFO ]: Found error trace [2018-06-22 11:05:15,453 INFO ]: trace histogram [10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:15,453 INFO ]: === Iteration 35 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:15,453 INFO ]: Analyzing trace with hash -744227010, now seen corresponding path program 31 times [2018-06-22 11:05:15,453 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:15,453 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:15,454 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:15,454 INFO ]: Changing assertion order to NOT_INCREMENTALLY [2018-06-22 11:05:15,454 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:15,468 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:15,987 INFO ]: Checked inductivity of 443 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-06-22 11:05:15,987 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:15,987 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:15,993 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:16,038 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:16,042 INFO ]: Computing forward predicates... [2018-06-22 11:05:16,654 INFO ]: Checked inductivity of 443 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2018-06-22 11:05:16,675 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:16,675 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 42 [2018-06-22 11:05:16,675 INFO ]: Interpolant automaton has 42 states [2018-06-22 11:05:16,675 INFO ]: Constructing interpolant automaton starting with 42 interpolants. [2018-06-22 11:05:16,676 INFO ]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2018-06-22 11:05:16,676 INFO ]: Start difference. First operand 119 states and 126 transitions. Second operand 42 states. [2018-06-22 11:05:17,183 WARN ]: Spent 165.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2018-06-22 11:05:17,335 INFO ]: Subtrahend was deterministic. Have not used determinization. [2018-06-22 11:05:17,335 INFO ]: Finished difference Result 121 states and 127 transitions. [2018-06-22 11:05:17,336 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-06-22 11:05:17,336 INFO ]: Start accepts. Automaton has 42 states. Word has length 125 [2018-06-22 11:05:17,336 INFO ]: Finished accepts. some prefix is accepted. [2018-06-22 11:05:17,336 INFO ]: With dead ends: 121 [2018-06-22 11:05:17,336 INFO ]: Without dead ends: 83 [2018-06-22 11:05:17,337 INFO ]: 0 DeclaredPredicates, 193 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2018-06-22 11:05:17,337 INFO ]: Start minimizeSevpa. Operand 83 states. [2018-06-22 11:05:17,340 INFO ]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-06-22 11:05:17,340 INFO ]: Start removeUnreachable. Operand 83 states. [2018-06-22 11:05:17,340 INFO ]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2018-06-22 11:05:17,341 INFO ]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 125 [2018-06-22 11:05:17,341 INFO ]: Finished accepts. word is rejected. [2018-06-22 11:05:17,341 INFO ]: Abstraction has 83 states and 88 transitions. [2018-06-22 11:05:17,341 INFO ]: Interpolant automaton has 42 states. [2018-06-22 11:05:17,341 INFO ]: Start isEmpty. Operand 83 states and 88 transitions. [2018-06-22 11:05:17,341 INFO ]: Finished isEmpty. Found accepting run of length 134 [2018-06-22 11:05:17,341 INFO ]: Found error trace [2018-06-22 11:05:17,341 INFO ]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-06-22 11:05:17,342 INFO ]: === Iteration 36 === [Ultimate.STARTErr0AssertViolationASSERT]=== [2018-06-22 11:05:17,342 INFO ]: Analyzing trace with hash 197938501, now seen corresponding path program 32 times [2018-06-22 11:05:17,342 INFO ]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-06-22 11:05:17,342 INFO ]: Using refinement strategy CamelRefinementStrategy [2018-06-22 11:05:17,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:17,342 INFO ]: Keeping assertion order NOT_INCREMENTALLY [2018-06-22 11:05:17,342 INFO ]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-06-22 11:05:17,491 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:18,025 INFO ]: Checked inductivity of 513 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2018-06-22 11:05:18,025 INFO ]: The current sequences of interpolants are not accepted, trying to find more. [2018-06-22 11:05:18,025 INFO ]: Switched to mode Z3_FP No working directory specified, using /storage/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-06-22 11:05:18,033 INFO ]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-06-22 11:05:18,090 INFO ]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-06-22 11:05:18,090 INFO ]: Conjunction of SSA is unsat [2018-06-22 11:05:18,096 INFO ]: Computing forward predicates... [2018-06-22 11:05:19,790 INFO ]: Checked inductivity of 513 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2018-06-22 11:05:19,823 INFO ]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-06-22 11:05:19,823 INFO ]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 56 [2018-06-22 11:05:19,824 INFO ]: Interpolant automaton has 56 states [2018-06-22 11:05:19,824 INFO ]: Constructing interpolant automaton starting with 56 interpolants. [2018-06-22 11:05:19,824 INFO ]: CoverageRelationStatistics Valid=116, Invalid=2964, Unknown=0, NotChecked=0, Total=3080 [2018-06-22 11:05:19,824 INFO ]: Start difference. First operand 83 states and 88 transitions. Second operand 56 states. Received shutdown request... [2018-06-22 11:05:20,163 INFO ]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-06-22 11:05:20,163 WARN ]: Verification canceled [2018-06-22 11:05:20,172 WARN ]: Timeout [2018-06-22 11:05:20,172 INFO ]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.06 11:05:20 BoogieIcfgContainer [2018-06-22 11:05:20,172 INFO ]: ------------------------ END TraceAbstraction---------------------------- [2018-06-22 11:05:20,173 INFO ]: Toolchain (without parser) took 60642.25 ms. Allocated memory was 305.1 MB in the beginning and 783.8 MB in the end (delta: 478.7 MB). Free memory was 261.5 MB in the beginning and 719.2 MB in the end (delta: -457.7 MB). Peak memory consumption was 21.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:05:20,179 INFO ]: SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:05:20,179 INFO ]: ChcToBoogie took 55.22 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:05:20,180 INFO ]: Boogie Preprocessor took 41.41 ms. Allocated memory is still 305.1 MB. Free memory is still 257.5 MB. There was no memory consumed. Max. memory is 3.6 GB. [2018-06-22 11:05:20,180 INFO ]: RCFGBuilder took 501.90 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 247.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:05:20,180 INFO ]: TraceAbstraction took 60034.85 ms. Allocated memory was 305.1 MB in the beginning and 783.8 MB in the end (delta: 478.7 MB). Free memory was 247.6 MB in the beginning and 719.2 MB in the end (delta: -471.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. [2018-06-22 11:05:20,182 INFO ]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * SmtParser took 0.06 ms. Allocated memory is still 305.1 MB. Free memory is still 269.6 MB. There was no memory consumed. Max. memory is 3.6 GB. * ChcToBoogie took 55.22 ms. Allocated memory is still 305.1 MB. Free memory was 259.5 MB in the beginning and 257.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 3.6 GB. * Boogie Preprocessor took 41.41 ms. Allocated memory is still 305.1 MB. Free memory is still 257.5 MB. There was no memory consumed. Max. memory is 3.6 GB. * RCFGBuilder took 501.90 ms. Allocated memory is still 305.1 MB. Free memory was 257.5 MB in the beginning and 247.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 3.6 GB. * TraceAbstraction took 60034.85 ms. Allocated memory was 305.1 MB in the beginning and 783.8 MB in the end (delta: 478.7 MB). Free memory was 247.6 MB in the beginning and 719.2 MB in the end (delta: -471.6 MB). Peak memory consumption was 7.0 MB. Max. memory is 3.6 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [UNKNOWN] : Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 0). Cancelled while BasicCegarLoop was constructing difference of abstraction (83states) and interpolant automaton (currently 4 states, 56 states before enhancement), while ReachableStatesComputation was computing reachable states (5 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 31 locations, 1 error locations. TIMEOUT Result, 59.9s OverallTime, 36 OverallIterations, 10 TraceHistogramMax, 25.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1209 SDtfs, 570 SDslu, 20108 SDs, 0 SdLazy, 11748 SolverSat, 541 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 10.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4186 GetRequests, 2630 SyntacticMatches, 106 SemanticMatches, 1450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11347 ImplicationChecksByTransitivity, 40.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=119occurred in iteration=34, 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: 0.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 192 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 30.6s InterpolantComputationTime, 5465 NumberOfCodeBlocks, 5465 NumberOfCodeBlocksAsserted, 154 NumberOfCheckSat, 5396 ConstructedInterpolants, 122 QuantifiedInterpolants, 1892736 SizeOfPredicates, 519 NumberOfNonLiveVariables, 10981 ConjunctsInSsa, 2066 ConjunctsInUnsatCore, 69 InterpolantComputations, 3 PerfectInterpolantSequences, 8813/12085 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/square_twice_safe_weaved.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-Benchmark-0-2018-06-22_11-05-20-203.csv Written .csv to /storage/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/square_twice_safe_weaved.c-1.smt2_AutomizerCHC_No_Goto.epf_AutomizerCHC.xml/Csv-TraceAbstractionBenchmarks-0-2018-06-22_11-05-20-203.csv Completed graceful shutdown