java -Xmx6000000000 -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data ./data --generate-csv --csv-dir ../../../releaseScripts/default/UAutomizer-linux/csv --cacsl2boogietranslator.bitprecise.bitfields false -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf -i ../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.23-666feb3-m [2018-04-11 10:10:41,637 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-04-11 10:10:41,638 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-04-11 10:10:41,651 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-04-11 10:10:41,651 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-04-11 10:10:41,651 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-04-11 10:10:41,652 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-04-11 10:10:41,654 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-04-11 10:10:41,655 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-04-11 10:10:41,656 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-04-11 10:10:41,657 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-04-11 10:10:41,657 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-04-11 10:10:41,658 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-04-11 10:10:41,658 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-04-11 10:10:41,659 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-04-11 10:10:41,661 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-04-11 10:10:41,662 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-04-11 10:10:41,664 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-04-11 10:10:41,665 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-04-11 10:10:41,666 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-04-11 10:10:41,667 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-04-11 10:10:41,667 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-04-11 10:10:41,668 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-04-11 10:10:41,669 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-04-11 10:10:41,669 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-04-11 10:10:41,670 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-04-11 10:10:41,670 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-04-11 10:10:41,671 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-04-11 10:10:41,671 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-04-11 10:10:41,672 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-04-11 10:10:41,672 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-04-11 10:10:41,672 INFO L98 SettingsManager]: Beginning loading settings from /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/cade18-smtinterpol/svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf [2018-04-11 10:10:41,692 INFO L110 SettingsManager]: Loading preferences was successful [2018-04-11 10:10:41,692 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-04-11 10:10:41,693 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-04-11 10:10:41,693 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-04-11 10:10:41,693 INFO L133 SettingsManager]: * Use SBE=true [2018-04-11 10:10:41,693 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-04-11 10:10:41,693 INFO L133 SettingsManager]: * sizeof long=4 [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Bitprecise bitfields=true [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * sizeof long double=12 [2018-04-11 10:10:41,694 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-04-11 10:10:41,694 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-04-11 10:10:41,695 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-04-11 10:10:41,695 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-11 10:10:41,695 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-04-11 10:10:41,695 INFO L133 SettingsManager]: * Interpolant automaton=TWOTRACK [2018-04-11 10:10:41,695 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-04-11 10:10:41,695 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Bitprecise bitfields -> false [2018-04-11 10:10:41,721 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-04-11 10:10:41,730 INFO L266 ainManager$Toolchain]: [Toolchain 1]: Parser(s) successfully (re)initialized [2018-04-11 10:10:41,732 INFO L222 ainManager$Toolchain]: [Toolchain 1]: Toolchain data selected. [2018-04-11 10:10:41,733 INFO L271 PluginConnector]: Initializing CDTParser... [2018-04-11 10:10:41,733 INFO L276 PluginConnector]: CDTParser initialized [2018-04-11 10:10:41,734 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_strcpy_false-valid-deref_ground.i [2018-04-11 10:10:42,043 INFO L225 CDTParser]: Created temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGb9f916098 [2018-04-11 10:10:42,125 INFO L287 CDTParser]: IsIndexed: true [2018-04-11 10:10:42,126 INFO L288 CDTParser]: Found 1 translation units. [2018-04-11 10:10:42,126 INFO L168 CDTParser]: Scanning standard_strcpy_false-valid-deref_ground.i [2018-04-11 10:10:42,127 INFO L210 ultiparseSymbolTable]: Include resolver: [2018-04-11 10:10:42,127 INFO L215 ultiparseSymbolTable]: [2018-04-11 10:10:42,127 INFO L218 ultiparseSymbolTable]: Function table: [2018-04-11 10:10:42,127 INFO L221 ultiparseSymbolTable]: Function definition of __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert ('__VERIFIER_assert') in standard_strcpy_false-valid-deref_ground.i [2018-04-11 10:10:42,127 INFO L221 ultiparseSymbolTable]: Function definition of null ('main') in standard_strcpy_false-valid-deref_ground.i [2018-04-11 10:10:42,128 INFO L227 ultiparseSymbolTable]: Global variable table: [2018-04-11 10:10:42,128 INFO L233 ultiparseSymbolTable]: [2018-04-11 10:10:42,139 INFO L330 CDTParser]: Deleted temporary CDT project at /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/data/FLAGb9f916098 [2018-04-11 10:10:42,142 INFO L304 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-04-11 10:10:42,143 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-04-11 10:10:42,143 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-04-11 10:10:42,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-04-11 10:10:42,148 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-04-11 10:10:42,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19101b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42, skipping insertion in model container [2018-04-11 10:10:42,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,165 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 10:10:42,176 INFO L167 Dispatcher]: Using SV-COMP mode [2018-04-11 10:10:42,295 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 10:10:42,309 INFO L175 PostProcessor]: Settings: Checked method=main [2018-04-11 10:10:42,313 INFO L100 SccComputation]: Graph consists of 0 InCaSumBalls and 5 non ball SCCs. Number of states in SCCs 5. [2018-04-11 10:10:42,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42 WrapperNode [2018-04-11 10:10:42,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-04-11 10:10:42,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-04-11 10:10:42,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-04-11 10:10:42,321 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-04-11 10:10:42,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,341 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... [2018-04-11 10:10:42,343 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-04-11 10:10:42,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-04-11 10:10:42,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-04-11 10:10:42,344 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-04-11 10:10:42,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (1/1) ... No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-04-11 10:10:42,389 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2018-04-11 10:10:42,389 INFO L136 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-04-11 10:10:42,389 INFO L136 BoogieDeclarations]: Found implementation of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-11 10:10:42,390 INFO L136 BoogieDeclarations]: Found implementation of procedure main [2018-04-11 10:10:42,390 INFO L128 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2018-04-11 10:10:42,390 INFO L128 BoogieDeclarations]: Found specification of procedure __U_MULTI_fstandard_strcpy_false_valid_deref_ground_i____VERIFIER_assert [2018-04-11 10:10:42,390 INFO L128 BoogieDeclarations]: Found specification of procedure main [2018-04-11 10:10:42,390 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2018-04-11 10:10:42,390 INFO L128 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-04-11 10:10:42,536 INFO L259 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-04-11 10:10:42,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 10:10:42 BoogieIcfgContainer [2018-04-11 10:10:42,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-04-11 10:10:42,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-04-11 10:10:42,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-04-11 10:10:42,539 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-04-11 10:10:42,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.04 10:10:42" (1/3) ... [2018-04-11 10:10:42,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108661e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 10:10:42, skipping insertion in model container [2018-04-11 10:10:42,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.04 10:10:42" (2/3) ... [2018-04-11 10:10:42,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@108661e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.04 10:10:42, skipping insertion in model container [2018-04-11 10:10:42,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.04 10:10:42" (3/3) ... [2018-04-11 10:10:42,542 INFO L107 eAbstractionObserver]: Analyzing ICFG standard_strcpy_false-valid-deref_ground.i [2018-04-11 10:10:42,547 INFO L131 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-04-11 10:10:42,552 INFO L143 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2018-04-11 10:10:42,574 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2018-04-11 10:10:42,574 INFO L369 AbstractCegarLoop]: Interprodecural is true [2018-04-11 10:10:42,574 INFO L370 AbstractCegarLoop]: Hoare is false [2018-04-11 10:10:42,574 INFO L371 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-04-11 10:10:42,574 INFO L372 AbstractCegarLoop]: Backedges is TWOTRACK [2018-04-11 10:10:42,574 INFO L373 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-04-11 10:10:42,574 INFO L374 AbstractCegarLoop]: Difference is false [2018-04-11 10:10:42,575 INFO L375 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-04-11 10:10:42,575 INFO L380 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-04-11 10:10:42,575 INFO L87 2NestedWordAutomaton]: Mode: main mode - execution starts in main procedure [2018-04-11 10:10:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2018-04-11 10:10:42,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-04-11 10:10:42,594 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:42,595 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:42,595 INFO L408 AbstractCegarLoop]: === Iteration 1 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash -42208474, now seen corresponding path program 1 times [2018-04-11 10:10:42,600 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:42,600 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:42,628 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,628 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:42,628 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:42,653 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:42,703 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 10:10:42,703 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-04-11 10:10:42,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-04-11 10:10:42,712 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-04-11 10:10:42,713 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-11 10:10:42,714 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2018-04-11 10:10:42,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:42,760 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2018-04-11 10:10:42,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-04-11 10:10:42,761 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2018-04-11 10:10:42,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:42,767 INFO L225 Difference]: With dead ends: 49 [2018-04-11 10:10:42,767 INFO L226 Difference]: Without dead ends: 40 [2018-04-11 10:10:42,768 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-04-11 10:10:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-04-11 10:10:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2018-04-11 10:10:42,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-04-11 10:10:42,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-04-11 10:10:42,792 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 7 [2018-04-11 10:10:42,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:42,793 INFO L459 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-04-11 10:10:42,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-04-11 10:10:42,793 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-04-11 10:10:42,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-04-11 10:10:42,793 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:42,794 INFO L355 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:42,794 INFO L408 AbstractCegarLoop]: === Iteration 2 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash 619915766, now seen corresponding path program 1 times [2018-04-11 10:10:42,794 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:42,794 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:42,795 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,795 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:42,795 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:42,805 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:42,838 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-04-11 10:10:42,838 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-04-11 10:10:42,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-11 10:10:42,839 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-11 10:10:42,839 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-11 10:10:42,839 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 4 states. [2018-04-11 10:10:42,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:42,858 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2018-04-11 10:10:42,862 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-11 10:10:42,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-04-11 10:10:42,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:42,863 INFO L225 Difference]: With dead ends: 34 [2018-04-11 10:10:42,863 INFO L226 Difference]: Without dead ends: 31 [2018-04-11 10:10:42,864 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2018-04-11 10:10:42,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-04-11 10:10:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-04-11 10:10:42,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-04-11 10:10:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2018-04-11 10:10:42,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 12 [2018-04-11 10:10:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:42,869 INFO L459 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2018-04-11 10:10:42,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-11 10:10:42,870 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2018-04-11 10:10:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-04-11 10:10:42,870 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:42,870 INFO L355 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:42,870 INFO L408 AbstractCegarLoop]: === Iteration 3 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 621575575, now seen corresponding path program 1 times [2018-04-11 10:10:42,870 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:42,870 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:42,871 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,871 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:42,871 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:42,877 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:42,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:42,916 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:42,916 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:10:42,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:42,942 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:42,993 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:42,993 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2018-04-11 10:10:42,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-04-11 10:10:42,993 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-04-11 10:10:42,993 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-04-11 10:10:42,994 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 4 states. [2018-04-11 10:10:43,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:43,058 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2018-04-11 10:10:43,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-04-11 10:10:43,058 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2018-04-11 10:10:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:43,059 INFO L225 Difference]: With dead ends: 45 [2018-04-11 10:10:43,059 INFO L226 Difference]: Without dead ends: 45 [2018-04-11 10:10:43,060 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-04-11 10:10:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-04-11 10:10:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2018-04-11 10:10:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-04-11 10:10:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2018-04-11 10:10:43,063 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 12 [2018-04-11 10:10:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:43,063 INFO L459 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2018-04-11 10:10:43,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-04-11 10:10:43,064 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2018-04-11 10:10:43,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-04-11 10:10:43,064 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:43,064 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:43,064 INFO L408 AbstractCegarLoop]: === Iteration 4 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:43,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1962704421, now seen corresponding path program 1 times [2018-04-11 10:10:43,065 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:43,065 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:43,066 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:43,066 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,072 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,122 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:43,122 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:43,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,133 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-04-11 10:10:43,154 INFO L320 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-04-11 10:10:43,155 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2018-04-11 10:10:43,155 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-11 10:10:43,155 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-11 10:10:43,155 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-11 10:10:43,155 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2018-04-11 10:10:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:43,203 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2018-04-11 10:10:43,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 10:10:43,203 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2018-04-11 10:10:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:43,204 INFO L225 Difference]: With dead ends: 57 [2018-04-11 10:10:43,204 INFO L226 Difference]: Without dead ends: 57 [2018-04-11 10:10:43,204 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-11 10:10:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-04-11 10:10:43,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2018-04-11 10:10:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-04-11 10:10:43,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2018-04-11 10:10:43,208 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 17 [2018-04-11 10:10:43,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:43,209 INFO L459 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2018-04-11 10:10:43,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-11 10:10:43,209 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2018-04-11 10:10:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-04-11 10:10:43,209 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:43,209 INFO L355 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:43,209 INFO L408 AbstractCegarLoop]: === Iteration 5 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1964364230, now seen corresponding path program 2 times [2018-04-11 10:10:43,210 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:43,210 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:43,211 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,211 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:43,211 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,220 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,257 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:43,257 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:43,265 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:43,275 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:43,275 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:43,277 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:43,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,300 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:43,300 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2018-04-11 10:10:43,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-04-11 10:10:43,300 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-04-11 10:10:43,301 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-11 10:10:43,301 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 5 states. [2018-04-11 10:10:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:43,341 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2018-04-11 10:10:43,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-04-11 10:10:43,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2018-04-11 10:10:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:43,343 INFO L225 Difference]: With dead ends: 71 [2018-04-11 10:10:43,343 INFO L226 Difference]: Without dead ends: 71 [2018-04-11 10:10:43,343 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-04-11 10:10:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2018-04-11 10:10:43,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 45. [2018-04-11 10:10:43,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-04-11 10:10:43,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2018-04-11 10:10:43,350 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 17 [2018-04-11 10:10:43,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:43,351 INFO L459 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2018-04-11 10:10:43,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-04-11 10:10:43,351 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2018-04-11 10:10:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-04-11 10:10:43,352 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:43,352 INFO L355 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:43,352 INFO L408 AbstractCegarLoop]: === Iteration 6 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:43,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1777648375, now seen corresponding path program 3 times [2018-04-11 10:10:43,352 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:43,352 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:43,353 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,353 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:43,353 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,361 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:43,421 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,422 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:43,422 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:43,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:10:43,457 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-04-11 10:10:43,457 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:43,458 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,490 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:43,490 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-04-11 10:10:43,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-11 10:10:43,491 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-11 10:10:43,491 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2018-04-11 10:10:43,491 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 7 states. [2018-04-11 10:10:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:43,599 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2018-04-11 10:10:43,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 10:10:43,599 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2018-04-11 10:10:43,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:43,600 INFO L225 Difference]: With dead ends: 89 [2018-04-11 10:10:43,600 INFO L226 Difference]: Without dead ends: 89 [2018-04-11 10:10:43,600 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2018-04-11 10:10:43,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-04-11 10:10:43,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 50. [2018-04-11 10:10:43,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-04-11 10:10:43,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2018-04-11 10:10:43,604 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 22 [2018-04-11 10:10:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:43,605 INFO L459 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2018-04-11 10:10:43,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-11 10:10:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2018-04-11 10:10:43,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-04-11 10:10:43,605 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:43,606 INFO L355 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:43,606 INFO L408 AbstractCegarLoop]: === Iteration 7 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:43,606 INFO L82 PathProgramCache]: Analyzing trace with hash -788155134, now seen corresponding path program 1 times [2018-04-11 10:10:43,606 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:43,606 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:43,607 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,607 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:43,607 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,615 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,642 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:43,642 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:43,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,659 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,697 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:43,697 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2018-04-11 10:10:43,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-04-11 10:10:43,697 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-04-11 10:10:43,698 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-04-11 10:10:43,698 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 8 states. [2018-04-11 10:10:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:43,767 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2018-04-11 10:10:43,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 10:10:43,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2018-04-11 10:10:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:43,768 INFO L225 Difference]: With dead ends: 59 [2018-04-11 10:10:43,768 INFO L226 Difference]: Without dead ends: 50 [2018-04-11 10:10:43,768 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2018-04-11 10:10:43,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-04-11 10:10:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-04-11 10:10:43,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-04-11 10:10:43,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2018-04-11 10:10:43,773 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 27 [2018-04-11 10:10:43,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:43,773 INFO L459 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2018-04-11 10:10:43,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-04-11 10:10:43,773 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2018-04-11 10:10:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-04-11 10:10:43,773 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:43,774 INFO L355 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:43,774 INFO L408 AbstractCegarLoop]: === Iteration 8 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1667360870, now seen corresponding path program 4 times [2018-04-11 10:10:43,774 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:43,774 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:43,774 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:43,775 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:43,800 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:43,857 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,857 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:43,857 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:43,862 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:10:43,868 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:10:43,869 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:43,870 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:43,903 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:43,903 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-04-11 10:10:43,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-04-11 10:10:43,903 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-04-11 10:10:43,904 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-04-11 10:10:43,904 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 7 states. [2018-04-11 10:10:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:44,009 INFO L93 Difference]: Finished difference Result 94 states and 101 transitions. [2018-04-11 10:10:44,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-04-11 10:10:44,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2018-04-11 10:10:44,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:44,010 INFO L225 Difference]: With dead ends: 94 [2018-04-11 10:10:44,011 INFO L226 Difference]: Without dead ends: 94 [2018-04-11 10:10:44,011 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-04-11 10:10:44,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-04-11 10:10:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 55. [2018-04-11 10:10:44,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-04-11 10:10:44,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2018-04-11 10:10:44,014 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 27 [2018-04-11 10:10:44,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:44,015 INFO L459 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2018-04-11 10:10:44,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-04-11 10:10:44,015 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2018-04-11 10:10:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-11 10:10:44,015 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:44,016 INFO L355 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:44,016 INFO L408 AbstractCegarLoop]: === Iteration 9 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:44,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1804493581, now seen corresponding path program 2 times [2018-04-11 10:10:44,016 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:44,016 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:44,017 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:44,017 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,023 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-11 10:10:44,061 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:44,061 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:44,068 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:44,077 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:44,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:44,078 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:44,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2018-04-11 10:10:44,111 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:44,111 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2018-04-11 10:10:44,112 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-04-11 10:10:44,112 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-04-11 10:10:44,112 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2018-04-11 10:10:44,112 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 6 states. [2018-04-11 10:10:44,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:44,143 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2018-04-11 10:10:44,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-04-11 10:10:44,143 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2018-04-11 10:10:44,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:44,144 INFO L225 Difference]: With dead ends: 55 [2018-04-11 10:10:44,144 INFO L226 Difference]: Without dead ends: 38 [2018-04-11 10:10:44,144 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-04-11 10:10:44,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-04-11 10:10:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-04-11 10:10:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-04-11 10:10:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-04-11 10:10:44,147 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2018-04-11 10:10:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:44,147 INFO L459 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-04-11 10:10:44,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-04-11 10:10:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-04-11 10:10:44,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-04-11 10:10:44,148 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:44,148 INFO L355 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:44,148 INFO L408 AbstractCegarLoop]: === Iteration 10 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash 651022423, now seen corresponding path program 5 times [2018-04-11 10:10:44,148 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:44,148 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:44,149 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:44,149 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,156 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,216 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:44,216 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:10:44,222 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:10:44,231 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-04-11 10:10:44,231 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:44,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:44,267 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,283 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:44,283 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2018-04-11 10:10:44,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-04-11 10:10:44,283 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-04-11 10:10:44,283 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2018-04-11 10:10:44,283 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 14 states. [2018-04-11 10:10:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:44,378 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-04-11 10:10:44,378 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-04-11 10:10:44,378 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2018-04-11 10:10:44,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:44,379 INFO L225 Difference]: With dead ends: 43 [2018-04-11 10:10:44,379 INFO L226 Difference]: Without dead ends: 43 [2018-04-11 10:10:44,379 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2018-04-11 10:10:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-04-11 10:10:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-04-11 10:10:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-04-11 10:10:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-04-11 10:10:44,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 32 [2018-04-11 10:10:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:44,382 INFO L459 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-04-11 10:10:44,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-04-11 10:10:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-04-11 10:10:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-04-11 10:10:44,383 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:44,383 INFO L355 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:44,383 INFO L408 AbstractCegarLoop]: === Iteration 11 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:44,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1728432378, now seen corresponding path program 6 times [2018-04-11 10:10:44,384 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:44,384 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:44,384 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,385 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:44,385 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,394 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,444 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:44,445 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:44,450 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:10:44,458 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-04-11 10:10:44,458 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:44,459 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,497 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:44,497 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2018-04-11 10:10:44,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-11 10:10:44,498 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-11 10:10:44,498 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2018-04-11 10:10:44,498 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 13 states. [2018-04-11 10:10:44,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:44,578 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-04-11 10:10:44,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-04-11 10:10:44,579 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2018-04-11 10:10:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:44,579 INFO L225 Difference]: With dead ends: 48 [2018-04-11 10:10:44,580 INFO L226 Difference]: Without dead ends: 48 [2018-04-11 10:10:44,580 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:44,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-04-11 10:10:44,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-04-11 10:10:44,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-04-11 10:10:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-04-11 10:10:44,582 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 37 [2018-04-11 10:10:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:44,582 INFO L459 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-04-11 10:10:44,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-11 10:10:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-04-11 10:10:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-04-11 10:10:44,583 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:44,583 INFO L355 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:44,583 INFO L408 AbstractCegarLoop]: === Iteration 12 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -616716873, now seen corresponding path program 7 times [2018-04-11 10:10:44,583 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:44,583 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:44,584 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,584 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:44,587 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,592 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,694 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:44,694 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:44,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:44,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,718 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,796 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:44,797 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-04-11 10:10:44,797 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-11 10:10:44,797 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-11 10:10:44,797 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:44,797 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 19 states. [2018-04-11 10:10:44,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:44,887 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-04-11 10:10:44,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-04-11 10:10:44,887 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2018-04-11 10:10:44,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:44,888 INFO L225 Difference]: With dead ends: 53 [2018-04-11 10:10:44,888 INFO L226 Difference]: Without dead ends: 53 [2018-04-11 10:10:44,888 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-04-11 10:10:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-04-11 10:10:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-04-11 10:10:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-04-11 10:10:44,890 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 42 [2018-04-11 10:10:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:44,890 INFO L459 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-04-11 10:10:44,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-11 10:10:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-04-11 10:10:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-04-11 10:10:44,891 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:44,891 INFO L355 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:44,891 INFO L408 AbstractCegarLoop]: === Iteration 13 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:44,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1845018022, now seen corresponding path program 8 times [2018-04-11 10:10:44,891 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:44,891 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:44,892 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,892 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:44,892 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:44,907 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:44,987 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:44,987 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:44,992 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:44,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:44,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:45,001 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:45,009 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,026 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:45,026 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-04-11 10:10:45,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-04-11 10:10:45,026 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-04-11 10:10:45,026 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-04-11 10:10:45,026 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 11 states. [2018-04-11 10:10:45,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:45,136 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-04-11 10:10:45,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-04-11 10:10:45,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2018-04-11 10:10:45,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:45,136 INFO L225 Difference]: With dead ends: 58 [2018-04-11 10:10:45,136 INFO L226 Difference]: Without dead ends: 58 [2018-04-11 10:10:45,137 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-04-11 10:10:45,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-04-11 10:10:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-04-11 10:10:45,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-04-11 10:10:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-04-11 10:10:45,138 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 47 [2018-04-11 10:10:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:45,138 INFO L459 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-04-11 10:10:45,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-04-11 10:10:45,138 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-04-11 10:10:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-04-11 10:10:45,139 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:45,139 INFO L355 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:45,140 INFO L408 AbstractCegarLoop]: === Iteration 14 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:45,140 INFO L82 PathProgramCache]: Analyzing trace with hash 795493143, now seen corresponding path program 9 times [2018-04-11 10:10:45,140 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:45,140 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:45,140 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:45,140 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:45,148 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,240 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:45,240 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:45,248 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:10:45,264 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2018-04-11 10:10:45,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:45,266 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,293 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:45,294 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2018-04-11 10:10:45,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-04-11 10:10:45,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-04-11 10:10:45,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2018-04-11 10:10:45,294 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 13 states. [2018-04-11 10:10:45,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:45,391 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-04-11 10:10:45,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-04-11 10:10:45,395 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 52 [2018-04-11 10:10:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:45,395 INFO L225 Difference]: With dead ends: 63 [2018-04-11 10:10:45,395 INFO L226 Difference]: Without dead ends: 63 [2018-04-11 10:10:45,396 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2018-04-11 10:10:45,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-04-11 10:10:45,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-04-11 10:10:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-04-11 10:10:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-04-11 10:10:45,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 52 [2018-04-11 10:10:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:45,397 INFO L459 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-04-11 10:10:45,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-04-11 10:10:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-04-11 10:10:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-04-11 10:10:45,398 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:45,398 INFO L355 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:45,398 INFO L408 AbstractCegarLoop]: === Iteration 15 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1643609158, now seen corresponding path program 10 times [2018-04-11 10:10:45,398 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:45,398 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:45,399 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:45,399 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:45,405 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,509 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:45,509 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:45,518 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:10:45,532 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:10:45,532 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:45,534 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:45,641 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,659 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:45,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-04-11 10:10:45,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-11 10:10:45,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-11 10:10:45,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-04-11 10:10:45,660 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 25 states. [2018-04-11 10:10:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:45,866 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-04-11 10:10:45,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-04-11 10:10:45,866 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-04-11 10:10:45,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:45,867 INFO L225 Difference]: With dead ends: 68 [2018-04-11 10:10:45,867 INFO L226 Difference]: Without dead ends: 68 [2018-04-11 10:10:45,867 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2018-04-11 10:10:45,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-04-11 10:10:45,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-04-11 10:10:45,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-04-11 10:10:45,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-04-11 10:10:45,869 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 57 [2018-04-11 10:10:45,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:45,869 INFO L459 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-04-11 10:10:45,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-11 10:10:45,869 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-04-11 10:10:45,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-04-11 10:10:45,870 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:45,870 INFO L355 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:45,870 INFO L408 AbstractCegarLoop]: === Iteration 16 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:45,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1408870519, now seen corresponding path program 11 times [2018-04-11 10:10:45,870 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:45,870 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:45,871 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,871 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:45,871 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:45,879 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:45,966 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:45,966 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:45,966 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:45,971 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:10:45,989 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-04-11 10:10:45,989 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:45,991 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:46,097 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:46,115 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:46,115 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2018-04-11 10:10:46,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-04-11 10:10:46,115 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-04-11 10:10:46,116 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2018-04-11 10:10:46,116 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 26 states. [2018-04-11 10:10:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:46,339 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2018-04-11 10:10:46,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-04-11 10:10:46,339 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 62 [2018-04-11 10:10:46,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:46,340 INFO L225 Difference]: With dead ends: 73 [2018-04-11 10:10:46,340 INFO L226 Difference]: Without dead ends: 73 [2018-04-11 10:10:46,340 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2018-04-11 10:10:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2018-04-11 10:10:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2018-04-11 10:10:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-04-11 10:10:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2018-04-11 10:10:46,342 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 62 [2018-04-11 10:10:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:46,342 INFO L459 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2018-04-11 10:10:46,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-04-11 10:10:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2018-04-11 10:10:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-04-11 10:10:46,342 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:46,343 INFO L355 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:46,343 INFO L408 AbstractCegarLoop]: === Iteration 17 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1139772698, now seen corresponding path program 12 times [2018-04-11 10:10:46,343 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:46,343 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:46,343 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:46,343 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:46,343 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:46,348 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:46,446 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:46,446 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:46,451 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:10:46,486 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-04-11 10:10:46,486 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:46,488 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:46,548 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:46,548 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2018-04-11 10:10:46,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-04-11 10:10:46,548 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-04-11 10:10:46,549 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2018-04-11 10:10:46,549 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 20 states. [2018-04-11 10:10:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:46,781 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2018-04-11 10:10:46,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-04-11 10:10:46,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 67 [2018-04-11 10:10:46,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:46,782 INFO L225 Difference]: With dead ends: 78 [2018-04-11 10:10:46,782 INFO L226 Difference]: Without dead ends: 78 [2018-04-11 10:10:46,783 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2018-04-11 10:10:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2018-04-11 10:10:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2018-04-11 10:10:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-04-11 10:10:46,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2018-04-11 10:10:46,785 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 67 [2018-04-11 10:10:46,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:46,786 INFO L459 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2018-04-11 10:10:46,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-04-11 10:10:46,786 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2018-04-11 10:10:46,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-04-11 10:10:46,786 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:46,787 INFO L355 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:46,787 INFO L408 AbstractCegarLoop]: === Iteration 18 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1645336023, now seen corresponding path program 13 times [2018-04-11 10:10:46,787 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:46,787 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:46,788 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:46,788 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:46,788 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:46,796 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:46,923 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:46,923 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:46,923 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:46,929 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:46,940 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:47,020 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:47,037 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:47,037 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2018-04-11 10:10:47,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-11 10:10:47,038 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-11 10:10:47,038 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-04-11 10:10:47,038 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand 31 states. [2018-04-11 10:10:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:47,317 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2018-04-11 10:10:47,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-04-11 10:10:47,317 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2018-04-11 10:10:47,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:47,318 INFO L225 Difference]: With dead ends: 83 [2018-04-11 10:10:47,318 INFO L226 Difference]: Without dead ends: 83 [2018-04-11 10:10:47,318 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2018-04-11 10:10:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-04-11 10:10:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2018-04-11 10:10:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2018-04-11 10:10:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2018-04-11 10:10:47,320 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 72 [2018-04-11 10:10:47,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:47,320 INFO L459 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2018-04-11 10:10:47,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-11 10:10:47,320 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2018-04-11 10:10:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2018-04-11 10:10:47,321 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:47,321 INFO L355 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:47,321 INFO L408 AbstractCegarLoop]: === Iteration 19 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:47,322 INFO L82 PathProgramCache]: Analyzing trace with hash 719167878, now seen corresponding path program 14 times [2018-04-11 10:10:47,322 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:47,322 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:47,325 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:47,325 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:47,326 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:47,333 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:47,495 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:47,495 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:47,501 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:47,513 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:47,513 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:47,514 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:47,613 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:47,631 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:47,631 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2018-04-11 10:10:47,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-04-11 10:10:47,631 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-04-11 10:10:47,632 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-04-11 10:10:47,632 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 33 states. [2018-04-11 10:10:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:47,975 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2018-04-11 10:10:47,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-04-11 10:10:47,975 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 77 [2018-04-11 10:10:47,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:47,976 INFO L225 Difference]: With dead ends: 88 [2018-04-11 10:10:47,976 INFO L226 Difference]: Without dead ends: 88 [2018-04-11 10:10:47,976 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2018-04-11 10:10:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2018-04-11 10:10:47,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2018-04-11 10:10:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2018-04-11 10:10:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2018-04-11 10:10:47,978 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 77 [2018-04-11 10:10:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:47,979 INFO L459 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2018-04-11 10:10:47,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-04-11 10:10:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2018-04-11 10:10:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2018-04-11 10:10:47,979 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:47,979 INFO L355 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:47,980 INFO L408 AbstractCegarLoop]: === Iteration 20 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1151808713, now seen corresponding path program 15 times [2018-04-11 10:10:47,980 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:47,980 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:47,980 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:47,980 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:47,980 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:47,987 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:48,098 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:48,098 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:48,103 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:10:48,123 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2018-04-11 10:10:48,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:48,124 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:48,150 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:48,150 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-04-11 10:10:48,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-11 10:10:48,151 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-11 10:10:48,151 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:48,151 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 19 states. [2018-04-11 10:10:48,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:48,346 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2018-04-11 10:10:48,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-04-11 10:10:48,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2018-04-11 10:10:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:48,347 INFO L225 Difference]: With dead ends: 93 [2018-04-11 10:10:48,347 INFO L226 Difference]: Without dead ends: 93 [2018-04-11 10:10:48,348 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=411, Invalid=711, Unknown=0, NotChecked=0, Total=1122 [2018-04-11 10:10:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-04-11 10:10:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-04-11 10:10:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-04-11 10:10:48,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2018-04-11 10:10:48,349 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 82 [2018-04-11 10:10:48,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:48,349 INFO L459 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2018-04-11 10:10:48,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-11 10:10:48,349 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2018-04-11 10:10:48,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2018-04-11 10:10:48,350 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:48,350 INFO L355 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:48,350 INFO L408 AbstractCegarLoop]: === Iteration 21 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:48,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1685653542, now seen corresponding path program 16 times [2018-04-11 10:10:48,350 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:48,350 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:48,351 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:48,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:48,351 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:48,356 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:48,506 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:48,506 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:48,506 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:48,511 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:10:48,522 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:10:48,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:48,523 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:48,535 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:48,552 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:48,552 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2018-04-11 10:10:48,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-04-11 10:10:48,553 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-04-11 10:10:48,553 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:48,553 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 19 states. [2018-04-11 10:10:48,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:48,872 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2018-04-11 10:10:48,872 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-04-11 10:10:48,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2018-04-11 10:10:48,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:48,873 INFO L225 Difference]: With dead ends: 98 [2018-04-11 10:10:48,873 INFO L226 Difference]: Without dead ends: 98 [2018-04-11 10:10:48,873 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-04-11 10:10:48,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2018-04-11 10:10:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2018-04-11 10:10:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2018-04-11 10:10:48,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2018-04-11 10:10:48,875 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 87 [2018-04-11 10:10:48,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:48,875 INFO L459 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2018-04-11 10:10:48,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-04-11 10:10:48,876 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2018-04-11 10:10:48,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-04-11 10:10:48,876 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:48,876 INFO L355 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:48,876 INFO L408 AbstractCegarLoop]: === Iteration 22 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:48,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1777633431, now seen corresponding path program 17 times [2018-04-11 10:10:48,876 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:48,876 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:48,877 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:48,877 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:48,877 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:48,885 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:49,034 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:49,034 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:49,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:10:49,080 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2018-04-11 10:10:49,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:49,082 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:49,308 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:49,308 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2018-04-11 10:10:49,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-04-11 10:10:49,309 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-04-11 10:10:49,309 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=1027, Unknown=0, NotChecked=0, Total=1406 [2018-04-11 10:10:49,309 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand 38 states. [2018-04-11 10:10:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:49,731 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2018-04-11 10:10:49,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-04-11 10:10:49,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 92 [2018-04-11 10:10:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:49,731 INFO L225 Difference]: With dead ends: 103 [2018-04-11 10:10:49,731 INFO L226 Difference]: Without dead ends: 103 [2018-04-11 10:10:49,732 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2018-04-11 10:10:49,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2018-04-11 10:10:49,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2018-04-11 10:10:49,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2018-04-11 10:10:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2018-04-11 10:10:49,734 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 92 [2018-04-11 10:10:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:49,734 INFO L459 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2018-04-11 10:10:49,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-04-11 10:10:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2018-04-11 10:10:49,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-04-11 10:10:49,735 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:49,735 INFO L355 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:49,735 INFO L408 AbstractCegarLoop]: === Iteration 23 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:49,736 INFO L82 PathProgramCache]: Analyzing trace with hash -964909370, now seen corresponding path program 18 times [2018-04-11 10:10:49,736 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:49,736 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:49,736 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:49,736 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:49,736 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:49,745 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:49,876 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:49,876 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:49,881 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:10:49,904 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-04-11 10:10:49,904 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:49,906 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:49,954 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:49,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:49,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 24 [2018-04-11 10:10:49,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-11 10:10:49,971 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-11 10:10:49,971 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=392, Unknown=0, NotChecked=0, Total=600 [2018-04-11 10:10:49,971 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 25 states. [2018-04-11 10:10:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:50,216 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2018-04-11 10:10:50,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-04-11 10:10:50,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2018-04-11 10:10:50,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:50,251 INFO L225 Difference]: With dead ends: 108 [2018-04-11 10:10:50,251 INFO L226 Difference]: Without dead ends: 108 [2018-04-11 10:10:50,252 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=620, Invalid=1186, Unknown=0, NotChecked=0, Total=1806 [2018-04-11 10:10:50,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-04-11 10:10:50,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2018-04-11 10:10:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-04-11 10:10:50,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2018-04-11 10:10:50,253 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 97 [2018-04-11 10:10:50,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:50,254 INFO L459 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2018-04-11 10:10:50,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-11 10:10:50,254 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2018-04-11 10:10:50,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2018-04-11 10:10:50,254 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:50,254 INFO L355 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:50,254 INFO L408 AbstractCegarLoop]: === Iteration 24 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:50,254 INFO L82 PathProgramCache]: Analyzing trace with hash -2138370569, now seen corresponding path program 19 times [2018-04-11 10:10:50,254 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:50,254 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:50,255 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:50,255 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:50,255 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:50,261 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:50,416 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:50,416 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:50,422 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:50,438 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:50,639 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:50,639 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 42 [2018-04-11 10:10:50,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-11 10:10:50,640 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-11 10:10:50,640 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-04-11 10:10:50,640 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand 43 states. [2018-04-11 10:10:51,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:51,064 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2018-04-11 10:10:51,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-04-11 10:10:51,064 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 102 [2018-04-11 10:10:51,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:51,065 INFO L225 Difference]: With dead ends: 113 [2018-04-11 10:10:51,065 INFO L226 Difference]: Without dead ends: 113 [2018-04-11 10:10:51,065 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2018-04-11 10:10:51,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-04-11 10:10:51,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2018-04-11 10:10:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-04-11 10:10:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2018-04-11 10:10:51,067 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 102 [2018-04-11 10:10:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:51,068 INFO L459 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2018-04-11 10:10:51,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-11 10:10:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2018-04-11 10:10:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-04-11 10:10:51,068 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:51,068 INFO L355 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:51,069 INFO L408 AbstractCegarLoop]: === Iteration 25 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash -167608986, now seen corresponding path program 20 times [2018-04-11 10:10:51,069 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:51,069 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:51,069 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:51,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:51,069 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:51,076 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:51,350 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:51,350 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:51,356 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:51,371 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:51,371 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:51,373 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:51,649 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:51,649 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2018-04-11 10:10:51,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-11 10:10:51,649 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-11 10:10:51,650 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-04-11 10:10:51,650 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 45 states. [2018-04-11 10:10:52,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:52,107 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2018-04-11 10:10:52,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-04-11 10:10:52,107 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 107 [2018-04-11 10:10:52,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:52,108 INFO L225 Difference]: With dead ends: 118 [2018-04-11 10:10:52,108 INFO L226 Difference]: Without dead ends: 118 [2018-04-11 10:10:52,109 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1518, Unknown=0, NotChecked=0, Total=1980 [2018-04-11 10:10:52,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2018-04-11 10:10:52,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2018-04-11 10:10:52,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2018-04-11 10:10:52,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 118 transitions. [2018-04-11 10:10:52,110 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 118 transitions. Word has length 107 [2018-04-11 10:10:52,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:52,110 INFO L459 AbstractCegarLoop]: Abstraction has 118 states and 118 transitions. [2018-04-11 10:10:52,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-11 10:10:52,111 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 118 transitions. [2018-04-11 10:10:52,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2018-04-11 10:10:52,111 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:52,111 INFO L355 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:52,111 INFO L408 AbstractCegarLoop]: === Iteration 26 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:52,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2051169111, now seen corresponding path program 21 times [2018-04-11 10:10:52,111 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:52,111 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:52,112 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:52,112 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:52,112 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:52,119 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:52,334 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:52,334 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:52,339 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:10:52,380 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-04-11 10:10:52,380 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:52,382 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:52,412 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:52,413 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2018-04-11 10:10:52,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-04-11 10:10:52,413 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-04-11 10:10:52,413 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=342, Unknown=0, NotChecked=0, Total=600 [2018-04-11 10:10:52,414 INFO L87 Difference]: Start difference. First operand 118 states and 118 transitions. Second operand 25 states. [2018-04-11 10:10:52,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:52,714 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2018-04-11 10:10:52,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-04-11 10:10:52,714 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2018-04-11 10:10:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:52,715 INFO L225 Difference]: With dead ends: 123 [2018-04-11 10:10:52,715 INFO L226 Difference]: Without dead ends: 123 [2018-04-11 10:10:52,715 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=762, Invalid=1308, Unknown=0, NotChecked=0, Total=2070 [2018-04-11 10:10:52,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-04-11 10:10:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2018-04-11 10:10:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2018-04-11 10:10:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2018-04-11 10:10:52,717 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 112 [2018-04-11 10:10:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:52,717 INFO L459 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2018-04-11 10:10:52,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-04-11 10:10:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2018-04-11 10:10:52,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2018-04-11 10:10:52,717 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:52,718 INFO L355 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:52,718 INFO L408 AbstractCegarLoop]: === Iteration 27 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:52,718 INFO L82 PathProgramCache]: Analyzing trace with hash 2141490182, now seen corresponding path program 22 times [2018-04-11 10:10:52,718 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:52,718 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:52,718 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:52,718 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:52,718 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:52,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:52,723 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:52,921 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:52,921 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:52,926 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:10:52,943 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:10:52,943 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:52,945 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:53,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:53,160 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 48 [2018-04-11 10:10:53,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-11 10:10:53,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-11 10:10:53,161 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-04-11 10:10:53,161 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 49 states. [2018-04-11 10:10:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:53,676 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2018-04-11 10:10:53,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-04-11 10:10:53,676 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 117 [2018-04-11 10:10:53,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:53,679 INFO L225 Difference]: With dead ends: 128 [2018-04-11 10:10:53,679 INFO L226 Difference]: Without dead ends: 128 [2018-04-11 10:10:53,680 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1752, Unknown=0, NotChecked=0, Total=2352 [2018-04-11 10:10:53,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2018-04-11 10:10:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2018-04-11 10:10:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2018-04-11 10:10:53,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 128 transitions. [2018-04-11 10:10:53,683 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 128 transitions. Word has length 117 [2018-04-11 10:10:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:53,683 INFO L459 AbstractCegarLoop]: Abstraction has 128 states and 128 transitions. [2018-04-11 10:10:53,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-11 10:10:53,684 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 128 transitions. [2018-04-11 10:10:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2018-04-11 10:10:53,684 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:53,687 INFO L355 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:53,687 INFO L408 AbstractCegarLoop]: === Iteration 28 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:53,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1698664265, now seen corresponding path program 23 times [2018-04-11 10:10:53,688 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:53,688 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:53,689 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:53,689 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:53,689 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:53,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:53,698 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:53,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:53,970 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:53,970 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:53,975 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:10:54,035 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2018-04-11 10:10:54,036 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:54,038 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:54,280 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:54,280 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2018-04-11 10:10:54,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-04-11 10:10:54,281 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-04-11 10:10:54,281 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1801, Unknown=0, NotChecked=0, Total=2450 [2018-04-11 10:10:54,281 INFO L87 Difference]: Start difference. First operand 128 states and 128 transitions. Second operand 50 states. [2018-04-11 10:10:54,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:54,835 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2018-04-11 10:10:54,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-04-11 10:10:54,836 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 122 [2018-04-11 10:10:54,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:54,836 INFO L225 Difference]: With dead ends: 133 [2018-04-11 10:10:54,836 INFO L226 Difference]: Without dead ends: 133 [2018-04-11 10:10:54,837 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2018-04-11 10:10:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2018-04-11 10:10:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2018-04-11 10:10:54,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-04-11 10:10:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2018-04-11 10:10:54,838 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 122 [2018-04-11 10:10:54,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:54,839 INFO L459 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2018-04-11 10:10:54,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-04-11 10:10:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2018-04-11 10:10:54,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2018-04-11 10:10:54,839 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:54,839 INFO L355 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:54,839 INFO L408 AbstractCegarLoop]: === Iteration 29 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:54,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2004669094, now seen corresponding path program 24 times [2018-04-11 10:10:54,839 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:54,839 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:54,840 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:54,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:54,840 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:54,845 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:55,075 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:55,075 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:55,080 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:10:55,121 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-04-11 10:10:55,121 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:55,123 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:55,250 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:55,250 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 36 [2018-04-11 10:10:55,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-11 10:10:55,251 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-11 10:10:55,251 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=932, Unknown=0, NotChecked=0, Total=1332 [2018-04-11 10:10:55,251 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 37 states. [2018-04-11 10:10:55,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:55,730 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2018-04-11 10:10:55,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-04-11 10:10:55,731 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 127 [2018-04-11 10:10:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:55,731 INFO L225 Difference]: With dead ends: 138 [2018-04-11 10:10:55,731 INFO L226 Difference]: Without dead ends: 138 [2018-04-11 10:10:55,732 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2593, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 10:10:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-04-11 10:10:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2018-04-11 10:10:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2018-04-11 10:10:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 138 transitions. [2018-04-11 10:10:55,734 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 138 transitions. Word has length 127 [2018-04-11 10:10:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:55,734 INFO L459 AbstractCegarLoop]: Abstraction has 138 states and 138 transitions. [2018-04-11 10:10:55,734 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-11 10:10:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 138 transitions. [2018-04-11 10:10:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-04-11 10:10:55,734 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:55,734 INFO L355 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:55,734 INFO L408 AbstractCegarLoop]: === Iteration 30 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:55,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1311460887, now seen corresponding path program 25 times [2018-04-11 10:10:55,734 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:55,735 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:55,735 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:55,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:55,735 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:55,740 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:56,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:56,055 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:56,056 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:56,070 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:56,095 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:56,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:56,354 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:56,354 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 54 [2018-04-11 10:10:56,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-11 10:10:56,355 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-11 10:10:56,355 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-04-11 10:10:56,355 INFO L87 Difference]: Start difference. First operand 138 states and 138 transitions. Second operand 55 states. [2018-04-11 10:10:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:57,134 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2018-04-11 10:10:57,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-04-11 10:10:57,134 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 132 [2018-04-11 10:10:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:57,135 INFO L225 Difference]: With dead ends: 143 [2018-04-11 10:10:57,135 INFO L226 Difference]: Without dead ends: 143 [2018-04-11 10:10:57,136 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=783, Invalid=2187, Unknown=0, NotChecked=0, Total=2970 [2018-04-11 10:10:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2018-04-11 10:10:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2018-04-11 10:10:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-04-11 10:10:57,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2018-04-11 10:10:57,139 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 132 [2018-04-11 10:10:57,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:57,139 INFO L459 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2018-04-11 10:10:57,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-11 10:10:57,139 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2018-04-11 10:10:57,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2018-04-11 10:10:57,140 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:57,140 INFO L355 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:57,140 INFO L408 AbstractCegarLoop]: === Iteration 31 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:57,140 INFO L82 PathProgramCache]: Analyzing trace with hash 421876038, now seen corresponding path program 26 times [2018-04-11 10:10:57,140 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:57,141 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:57,141 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:57,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:10:57,141 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:57,147 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:57,384 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:57,384 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:57,390 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:10:57,407 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:10:57,407 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:57,409 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:57,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:57,680 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:57,680 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 56 [2018-04-11 10:10:57,681 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-04-11 10:10:57,681 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-04-11 10:10:57,681 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-04-11 10:10:57,682 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 57 states. [2018-04-11 10:10:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:58,490 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2018-04-11 10:10:58,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-04-11 10:10:58,490 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 137 [2018-04-11 10:10:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:58,491 INFO L225 Difference]: With dead ends: 148 [2018-04-11 10:10:58,491 INFO L226 Difference]: Without dead ends: 148 [2018-04-11 10:10:58,491 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=812, Invalid=2380, Unknown=0, NotChecked=0, Total=3192 [2018-04-11 10:10:58,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2018-04-11 10:10:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2018-04-11 10:10:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2018-04-11 10:10:58,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 148 transitions. [2018-04-11 10:10:58,493 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 148 transitions. Word has length 137 [2018-04-11 10:10:58,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:58,494 INFO L459 AbstractCegarLoop]: Abstraction has 148 states and 148 transitions. [2018-04-11 10:10:58,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-04-11 10:10:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 148 transitions. [2018-04-11 10:10:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-04-11 10:10:58,494 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:58,494 INFO L355 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:58,494 INFO L408 AbstractCegarLoop]: === Iteration 32 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:58,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1993804937, now seen corresponding path program 27 times [2018-04-11 10:10:58,495 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:58,495 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:58,495 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:58,495 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:58,495 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:58,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:58,503 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:58,828 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:58,828 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:58,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:10:58,903 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2018-04-11 10:10:58,903 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:58,905 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:10:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:58,950 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:10:58,950 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2018-04-11 10:10:58,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-04-11 10:10:58,951 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-04-11 10:10:58,951 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=519, Unknown=0, NotChecked=0, Total=930 [2018-04-11 10:10:58,951 INFO L87 Difference]: Start difference. First operand 148 states and 148 transitions. Second operand 31 states. [2018-04-11 10:10:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:10:59,393 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2018-04-11 10:10:59,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-04-11 10:10:59,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 142 [2018-04-11 10:10:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:10:59,394 INFO L225 Difference]: With dead ends: 153 [2018-04-11 10:10:59,394 INFO L226 Difference]: Without dead ends: 153 [2018-04-11 10:10:59,395 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1221, Invalid=2085, Unknown=0, NotChecked=0, Total=3306 [2018-04-11 10:10:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2018-04-11 10:10:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2018-04-11 10:10:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2018-04-11 10:10:59,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2018-04-11 10:10:59,397 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 142 [2018-04-11 10:10:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:10:59,397 INFO L459 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2018-04-11 10:10:59,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-04-11 10:10:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2018-04-11 10:10:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2018-04-11 10:10:59,398 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:10:59,398 INFO L355 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2018-04-11 10:10:59,398 INFO L408 AbstractCegarLoop]: === Iteration 33 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:10:59,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1740113894, now seen corresponding path program 28 times [2018-04-11 10:10:59,398 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:10:59,399 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:10:59,399 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:59,399 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:10:59,399 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:10:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:10:59,409 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:10:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:10:59,722 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:10:59,722 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:10:59,729 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:10:59,744 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:10:59,744 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:10:59,746 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:00,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:00,065 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:00,065 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 60 [2018-04-11 10:11:00,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-11 10:11:00,065 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-11 10:11:00,066 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 10:11:00,066 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 61 states. [2018-04-11 10:11:01,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:01,190 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2018-04-11 10:11:01,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-04-11 10:11:01,191 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 147 [2018-04-11 10:11:01,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:01,191 INFO L225 Difference]: With dead ends: 158 [2018-04-11 10:11:01,191 INFO L226 Difference]: Without dead ends: 158 [2018-04-11 10:11:01,192 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=870, Invalid=2790, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 10:11:01,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2018-04-11 10:11:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2018-04-11 10:11:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2018-04-11 10:11:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 158 transitions. [2018-04-11 10:11:01,193 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 158 transitions. Word has length 147 [2018-04-11 10:11:01,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:01,193 INFO L459 AbstractCegarLoop]: Abstraction has 158 states and 158 transitions. [2018-04-11 10:11:01,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-11 10:11:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 158 transitions. [2018-04-11 10:11:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2018-04-11 10:11:01,194 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:01,194 INFO L355 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:01,194 INFO L408 AbstractCegarLoop]: === Iteration 34 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 685727959, now seen corresponding path program 29 times [2018-04-11 10:11:01,194 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:01,194 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:01,195 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:01,195 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:01,195 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:01,200 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:01,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:01,514 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:01,514 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:11:01,519 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:11:01,638 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2018-04-11 10:11:01,638 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:01,640 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:01,979 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:01,980 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 61 [2018-04-11 10:11:01,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-04-11 10:11:01,981 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-04-11 10:11:01,981 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=991, Invalid=2791, Unknown=0, NotChecked=0, Total=3782 [2018-04-11 10:11:01,981 INFO L87 Difference]: Start difference. First operand 158 states and 158 transitions. Second operand 62 states. [2018-04-11 10:11:03,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:03,156 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2018-04-11 10:11:03,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-04-11 10:11:03,156 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 152 [2018-04-11 10:11:03,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:03,157 INFO L225 Difference]: With dead ends: 163 [2018-04-11 10:11:03,157 INFO L226 Difference]: Without dead ends: 163 [2018-04-11 10:11:03,157 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1023, Invalid=2883, Unknown=0, NotChecked=0, Total=3906 [2018-04-11 10:11:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2018-04-11 10:11:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2018-04-11 10:11:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2018-04-11 10:11:03,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2018-04-11 10:11:03,159 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 152 [2018-04-11 10:11:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:03,160 INFO L459 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2018-04-11 10:11:03,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-04-11 10:11:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2018-04-11 10:11:03,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2018-04-11 10:11:03,160 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:03,160 INFO L355 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:03,161 INFO L408 AbstractCegarLoop]: === Iteration 35 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:03,161 INFO L82 PathProgramCache]: Analyzing trace with hash -842074490, now seen corresponding path program 30 times [2018-04-11 10:11:03,161 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:03,161 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:03,161 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:03,162 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:03,162 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:03,171 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:03,480 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:03,480 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:11:03,485 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:11:03,588 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-04-11 10:11:03,589 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:03,591 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:03,693 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:03,693 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 36 [2018-04-11 10:11:03,693 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-11 10:11:03,694 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-11 10:11:03,694 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=818, Unknown=0, NotChecked=0, Total=1332 [2018-04-11 10:11:03,694 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 37 states. [2018-04-11 10:11:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:04,216 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2018-04-11 10:11:04,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-04-11 10:11:04,216 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 157 [2018-04-11 10:11:04,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:04,217 INFO L225 Difference]: With dead ends: 168 [2018-04-11 10:11:04,217 INFO L226 Difference]: Without dead ends: 168 [2018-04-11 10:11:04,217 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1562, Invalid=2860, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:11:04,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2018-04-11 10:11:04,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2018-04-11 10:11:04,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-04-11 10:11:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 168 transitions. [2018-04-11 10:11:04,220 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 168 transitions. Word has length 157 [2018-04-11 10:11:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:04,220 INFO L459 AbstractCegarLoop]: Abstraction has 168 states and 168 transitions. [2018-04-11 10:11:04,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-11 10:11:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 168 transitions. [2018-04-11 10:11:04,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2018-04-11 10:11:04,221 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:04,221 INFO L355 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:04,221 INFO L408 AbstractCegarLoop]: === Iteration 36 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:04,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1391760951, now seen corresponding path program 31 times [2018-04-11 10:11:04,221 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:04,221 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:04,222 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:04,222 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:04,222 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:04,230 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:04,591 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:04,591 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/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 [2018-04-11 10:11:04,596 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:04,613 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:04,919 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:04,919 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 66 [2018-04-11 10:11:04,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-11 10:11:04,921 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-11 10:11:04,921 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:11:04,921 INFO L87 Difference]: Start difference. First operand 168 states and 168 transitions. Second operand 67 states. [2018-04-11 10:11:06,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:06,114 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2018-04-11 10:11:06,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-04-11 10:11:06,114 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 162 [2018-04-11 10:11:06,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:06,115 INFO L225 Difference]: With dead ends: 173 [2018-04-11 10:11:06,115 INFO L226 Difference]: Without dead ends: 173 [2018-04-11 10:11:06,116 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1155, Invalid=3267, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:11:06,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-04-11 10:11:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2018-04-11 10:11:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-04-11 10:11:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2018-04-11 10:11:06,118 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 162 [2018-04-11 10:11:06,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:06,118 INFO L459 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2018-04-11 10:11:06,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-11 10:11:06,118 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2018-04-11 10:11:06,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-04-11 10:11:06,118 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:06,119 INFO L355 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:06,119 INFO L408 AbstractCegarLoop]: === Iteration 37 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:06,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1115415258, now seen corresponding path program 32 times [2018-04-11 10:11:06,119 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:06,119 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:06,119 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:06,119 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:06,119 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:06,125 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:06,708 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:06,709 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:06,713 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:11:06,739 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:11:06,739 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:06,741 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:06,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:06,828 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:06,829 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2018-04-11 10:11:06,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-04-11 10:11:06,829 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-04-11 10:11:06,829 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-04-11 10:11:06,830 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 35 states. [2018-04-11 10:11:08,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:08,082 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2018-04-11 10:11:08,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-04-11 10:11:08,082 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 167 [2018-04-11 10:11:08,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:08,083 INFO L225 Difference]: With dead ends: 178 [2018-04-11 10:11:08,083 INFO L226 Difference]: Without dead ends: 178 [2018-04-11 10:11:08,083 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-04-11 10:11:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2018-04-11 10:11:08,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2018-04-11 10:11:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-04-11 10:11:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 178 transitions. [2018-04-11 10:11:08,086 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 178 transitions. Word has length 167 [2018-04-11 10:11:08,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:08,087 INFO L459 AbstractCegarLoop]: Abstraction has 178 states and 178 transitions. [2018-04-11 10:11:08,087 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-04-11 10:11:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 178 transitions. [2018-04-11 10:11:08,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-04-11 10:11:08,087 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:08,088 INFO L355 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:08,088 INFO L408 AbstractCegarLoop]: === Iteration 38 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:08,088 INFO L82 PathProgramCache]: Analyzing trace with hash -712076393, now seen corresponding path program 33 times [2018-04-11 10:11:08,088 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:08,088 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:08,089 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:08,089 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:08,089 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:08,100 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:08,660 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:08,660 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:08,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:11:08,842 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2018-04-11 10:11:08,842 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:08,845 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:08,884 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:08,884 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2018-04-11 10:11:08,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-04-11 10:11:08,885 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-04-11 10:11:08,885 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=732, Unknown=0, NotChecked=0, Total=1332 [2018-04-11 10:11:08,885 INFO L87 Difference]: Start difference. First operand 178 states and 178 transitions. Second operand 37 states. [2018-04-11 10:11:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:09,394 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2018-04-11 10:11:09,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-04-11 10:11:09,394 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 172 [2018-04-11 10:11:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:09,395 INFO L225 Difference]: With dead ends: 183 [2018-04-11 10:11:09,395 INFO L226 Difference]: Without dead ends: 183 [2018-04-11 10:11:09,396 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1788, Invalid=3042, Unknown=0, NotChecked=0, Total=4830 [2018-04-11 10:11:09,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-04-11 10:11:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2018-04-11 10:11:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-04-11 10:11:09,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2018-04-11 10:11:09,399 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 172 [2018-04-11 10:11:09,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:09,399 INFO L459 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2018-04-11 10:11:09,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-04-11 10:11:09,399 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2018-04-11 10:11:09,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-04-11 10:11:09,400 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:09,400 INFO L355 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:09,400 INFO L408 AbstractCegarLoop]: === Iteration 39 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:09,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1349614534, now seen corresponding path program 34 times [2018-04-11 10:11:09,401 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:09,401 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:09,401 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:09,401 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:09,401 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:09,411 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:09,793 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:09,793 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:09,797 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:11:09,817 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:11:09,817 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:09,820 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:10,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:10,338 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:10,338 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 72 [2018-04-11 10:11:10,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-11 10:11:10,339 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-11 10:11:10,340 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 10:11:10,340 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 73 states. [2018-04-11 10:11:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:11,588 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2018-04-11 10:11:11,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-04-11 10:11:11,589 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 177 [2018-04-11 10:11:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:11,590 INFO L225 Difference]: With dead ends: 188 [2018-04-11 10:11:11,590 INFO L226 Difference]: Without dead ends: 188 [2018-04-11 10:11:11,590 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1332, Invalid=3924, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 10:11:11,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2018-04-11 10:11:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2018-04-11 10:11:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2018-04-11 10:11:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 188 transitions. [2018-04-11 10:11:11,593 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 188 transitions. Word has length 177 [2018-04-11 10:11:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:11,593 INFO L459 AbstractCegarLoop]: Abstraction has 188 states and 188 transitions. [2018-04-11 10:11:11,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-11 10:11:11,593 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 188 transitions. [2018-04-11 10:11:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2018-04-11 10:11:11,594 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:11,594 INFO L355 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:11,594 INFO L408 AbstractCegarLoop]: === Iteration 40 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2024580873, now seen corresponding path program 35 times [2018-04-11 10:11:11,594 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:11,594 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:11,595 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:11,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:11,595 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:11,601 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:11,972 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:11,972 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:11,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:11:12,187 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-04-11 10:11:12,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:12,190 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:12,688 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:12,688 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 73 [2018-04-11 10:11:12,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-04-11 10:11:12,689 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-04-11 10:11:12,689 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1405, Invalid=3997, Unknown=0, NotChecked=0, Total=5402 [2018-04-11 10:11:12,689 INFO L87 Difference]: Start difference. First operand 188 states and 188 transitions. Second operand 74 states. [2018-04-11 10:11:13,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:13,873 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2018-04-11 10:11:13,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-04-11 10:11:13,873 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 182 [2018-04-11 10:11:13,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:13,874 INFO L225 Difference]: With dead ends: 193 [2018-04-11 10:11:13,874 INFO L226 Difference]: Without dead ends: 193 [2018-04-11 10:11:13,875 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2451 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1443, Invalid=4107, Unknown=0, NotChecked=0, Total=5550 [2018-04-11 10:11:13,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2018-04-11 10:11:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2018-04-11 10:11:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2018-04-11 10:11:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2018-04-11 10:11:13,877 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 182 [2018-04-11 10:11:13,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:13,878 INFO L459 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2018-04-11 10:11:13,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-04-11 10:11:13,878 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2018-04-11 10:11:13,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2018-04-11 10:11:13,879 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:13,879 INFO L355 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:13,879 INFO L408 AbstractCegarLoop]: === Iteration 41 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:13,879 INFO L82 PathProgramCache]: Analyzing trace with hash -407825818, now seen corresponding path program 36 times [2018-04-11 10:11:13,879 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:13,879 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:13,880 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:13,880 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:13,880 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:13,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:13,890 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:14,293 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:14,293 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:14,298 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:11:14,390 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2018-04-11 10:11:14,390 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:14,392 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:14,533 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:14,533 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 44 [2018-04-11 10:11:14,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-04-11 10:11:14,533 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-04-11 10:11:14,534 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1244, Unknown=0, NotChecked=0, Total=1980 [2018-04-11 10:11:14,534 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 45 states. [2018-04-11 10:11:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:15,318 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2018-04-11 10:11:15,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-04-11 10:11:15,318 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 187 [2018-04-11 10:11:15,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:15,319 INFO L225 Difference]: With dead ends: 198 [2018-04-11 10:11:15,319 INFO L226 Difference]: Without dead ends: 198 [2018-04-11 10:11:15,319 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2205, Invalid=4275, Unknown=0, NotChecked=0, Total=6480 [2018-04-11 10:11:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2018-04-11 10:11:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2018-04-11 10:11:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2018-04-11 10:11:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 198 transitions. [2018-04-11 10:11:15,321 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 198 transitions. Word has length 187 [2018-04-11 10:11:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:15,321 INFO L459 AbstractCegarLoop]: Abstraction has 198 states and 198 transitions. [2018-04-11 10:11:15,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-04-11 10:11:15,321 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 198 transitions. [2018-04-11 10:11:15,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2018-04-11 10:11:15,322 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:15,322 INFO L355 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:15,322 INFO L408 AbstractCegarLoop]: === Iteration 42 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1486297513, now seen corresponding path program 37 times [2018-04-11 10:11:15,322 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:15,322 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:15,322 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:15,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:15,322 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:15,328 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:15,732 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:15,732 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:15,737 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:15,759 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:16,168 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:16,168 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 78 [2018-04-11 10:11:16,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2018-04-11 10:11:16,169 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2018-04-11 10:11:16,169 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-04-11 10:11:16,169 INFO L87 Difference]: Start difference. First operand 198 states and 198 transitions. Second operand 79 states. [2018-04-11 10:11:17,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:17,484 INFO L93 Difference]: Finished difference Result 203 states and 203 transitions. [2018-04-11 10:11:17,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-04-11 10:11:17,484 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 192 [2018-04-11 10:11:17,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:17,485 INFO L225 Difference]: With dead ends: 203 [2018-04-11 10:11:17,485 INFO L226 Difference]: Without dead ends: 203 [2018-04-11 10:11:17,485 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1599, Invalid=4563, Unknown=0, NotChecked=0, Total=6162 [2018-04-11 10:11:17,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2018-04-11 10:11:17,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2018-04-11 10:11:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2018-04-11 10:11:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2018-04-11 10:11:17,488 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 192 [2018-04-11 10:11:17,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:17,488 INFO L459 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2018-04-11 10:11:17,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states. [2018-04-11 10:11:17,488 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2018-04-11 10:11:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2018-04-11 10:11:17,489 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:17,489 INFO L355 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:17,489 INFO L408 AbstractCegarLoop]: === Iteration 43 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:17,490 INFO L82 PathProgramCache]: Analyzing trace with hash -874716922, now seen corresponding path program 38 times [2018-04-11 10:11:17,490 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:17,490 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:17,490 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:17,490 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:17,490 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:17,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:17,499 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:17,934 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:17,934 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:17,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:11:17,958 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:11:17,958 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:17,961 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:18,480 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:18,481 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 80 [2018-04-11 10:11:18,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 81 states [2018-04-11 10:11:18,481 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2018-04-11 10:11:18,482 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-04-11 10:11:18,482 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 81 states. [2018-04-11 10:11:20,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:20,075 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2018-04-11 10:11:20,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-04-11 10:11:20,075 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 197 [2018-04-11 10:11:20,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:20,075 INFO L225 Difference]: With dead ends: 208 [2018-04-11 10:11:20,075 INFO L226 Difference]: Without dead ends: 208 [2018-04-11 10:11:20,076 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2923 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1640, Invalid=4840, Unknown=0, NotChecked=0, Total=6480 [2018-04-11 10:11:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2018-04-11 10:11:20,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2018-04-11 10:11:20,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2018-04-11 10:11:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 208 transitions. [2018-04-11 10:11:20,077 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 208 transitions. Word has length 197 [2018-04-11 10:11:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:20,078 INFO L459 AbstractCegarLoop]: Abstraction has 208 states and 208 transitions. [2018-04-11 10:11:20,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states. [2018-04-11 10:11:20,078 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 208 transitions. [2018-04-11 10:11:20,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2018-04-11 10:11:20,079 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:20,079 INFO L355 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:20,079 INFO L408 AbstractCegarLoop]: === Iteration 44 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1031093175, now seen corresponding path program 39 times [2018-04-11 10:11:20,079 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:20,079 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:20,080 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:20,080 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:20,080 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:20,086 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:20,532 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:20,532 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:20,551 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:11:20,760 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2018-04-11 10:11:20,760 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:20,763 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:20,834 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:20,834 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2018-04-11 10:11:20,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-04-11 10:11:20,834 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-04-11 10:11:20,834 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=825, Invalid=981, Unknown=0, NotChecked=0, Total=1806 [2018-04-11 10:11:20,834 INFO L87 Difference]: Start difference. First operand 208 states and 208 transitions. Second operand 43 states. [2018-04-11 10:11:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:21,459 INFO L93 Difference]: Finished difference Result 213 states and 213 transitions. [2018-04-11 10:11:21,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-04-11 10:11:21,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 202 [2018-04-11 10:11:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:21,460 INFO L225 Difference]: With dead ends: 213 [2018-04-11 10:11:21,460 INFO L226 Difference]: Without dead ends: 213 [2018-04-11 10:11:21,460 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2463, Invalid=4179, Unknown=0, NotChecked=0, Total=6642 [2018-04-11 10:11:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2018-04-11 10:11:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2018-04-11 10:11:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2018-04-11 10:11:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2018-04-11 10:11:21,462 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 202 [2018-04-11 10:11:21,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:21,462 INFO L459 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2018-04-11 10:11:21,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-04-11 10:11:21,462 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2018-04-11 10:11:21,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2018-04-11 10:11:21,463 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:21,463 INFO L355 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:21,463 INFO L408 AbstractCegarLoop]: === Iteration 45 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:21,463 INFO L82 PathProgramCache]: Analyzing trace with hash -854661210, now seen corresponding path program 40 times [2018-04-11 10:11:21,463 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:21,463 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:21,464 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:21,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:21,464 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:21,470 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:21,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:21,915 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:21,915 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:21,920 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:11:21,941 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:11:21,942 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:21,944 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:22,651 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:22,651 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 84 [2018-04-11 10:11:22,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-04-11 10:11:22,652 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-04-11 10:11:22,652 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-04-11 10:11:22,652 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand 85 states. [2018-04-11 10:11:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:23,810 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2018-04-11 10:11:23,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-04-11 10:11:23,810 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 207 [2018-04-11 10:11:23,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:23,811 INFO L225 Difference]: With dead ends: 218 [2018-04-11 10:11:23,811 INFO L226 Difference]: Without dead ends: 218 [2018-04-11 10:11:23,811 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1554, Invalid=5586, Unknown=0, NotChecked=0, Total=7140 [2018-04-11 10:11:23,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-04-11 10:11:23,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2018-04-11 10:11:23,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2018-04-11 10:11:23,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 218 transitions. [2018-04-11 10:11:23,813 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 218 transitions. Word has length 207 [2018-04-11 10:11:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:23,813 INFO L459 AbstractCegarLoop]: Abstraction has 218 states and 218 transitions. [2018-04-11 10:11:23,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-04-11 10:11:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 218 transitions. [2018-04-11 10:11:23,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2018-04-11 10:11:23,814 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:23,814 INFO L355 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:23,814 INFO L408 AbstractCegarLoop]: === Iteration 46 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2040420631, now seen corresponding path program 41 times [2018-04-11 10:11:23,814 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:23,814 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:23,814 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:23,815 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:23,815 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:23,821 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:24,306 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:24,306 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:24,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:11:24,665 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2018-04-11 10:11:24,665 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:24,669 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:25,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:25,293 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:25,293 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 85 [2018-04-11 10:11:25,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 86 states [2018-04-11 10:11:25,294 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2018-04-11 10:11:25,294 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=5419, Unknown=0, NotChecked=0, Total=7310 [2018-04-11 10:11:25,294 INFO L87 Difference]: Start difference. First operand 218 states and 218 transitions. Second operand 86 states. [2018-04-11 10:11:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:27,545 INFO L93 Difference]: Finished difference Result 223 states and 223 transitions. [2018-04-11 10:11:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-04-11 10:11:27,546 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 212 [2018-04-11 10:11:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:27,546 INFO L225 Difference]: With dead ends: 223 [2018-04-11 10:11:27,546 INFO L226 Difference]: Without dead ends: 223 [2018-04-11 10:11:27,547 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1935, Invalid=5547, Unknown=0, NotChecked=0, Total=7482 [2018-04-11 10:11:27,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-04-11 10:11:27,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2018-04-11 10:11:27,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2018-04-11 10:11:27,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2018-04-11 10:11:27,548 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 212 [2018-04-11 10:11:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:27,549 INFO L459 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2018-04-11 10:11:27,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states. [2018-04-11 10:11:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2018-04-11 10:11:27,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2018-04-11 10:11:27,549 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:27,549 INFO L355 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:27,549 INFO L408 AbstractCegarLoop]: === Iteration 47 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash -488561082, now seen corresponding path program 42 times [2018-04-11 10:11:27,549 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:27,550 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:27,550 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:27,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:27,550 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:27,556 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:28,126 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:28,127 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:28,132 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:11:28,274 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2018-04-11 10:11:28,274 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:28,277 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:28,363 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:28,363 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 48 [2018-04-11 10:11:28,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-11 10:11:28,363 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-11 10:11:28,364 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=1388, Unknown=0, NotChecked=0, Total=2352 [2018-04-11 10:11:28,364 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand 49 states. [2018-04-11 10:11:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:29,128 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2018-04-11 10:11:29,128 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-04-11 10:11:29,128 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 217 [2018-04-11 10:11:29,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:29,129 INFO L225 Difference]: With dead ends: 228 [2018-04-11 10:11:29,129 INFO L226 Difference]: Without dead ends: 228 [2018-04-11 10:11:29,129 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2936, Invalid=5254, Unknown=0, NotChecked=0, Total=8190 [2018-04-11 10:11:29,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2018-04-11 10:11:29,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2018-04-11 10:11:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2018-04-11 10:11:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 228 transitions. [2018-04-11 10:11:29,131 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 228 transitions. Word has length 217 [2018-04-11 10:11:29,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:29,131 INFO L459 AbstractCegarLoop]: Abstraction has 228 states and 228 transitions. [2018-04-11 10:11:29,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-11 10:11:29,131 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 228 transitions. [2018-04-11 10:11:29,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2018-04-11 10:11:29,132 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:29,132 INFO L355 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:29,132 INFO L408 AbstractCegarLoop]: === Iteration 48 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:29,132 INFO L82 PathProgramCache]: Analyzing trace with hash 344604279, now seen corresponding path program 43 times [2018-04-11 10:11:29,132 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:29,132 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:29,133 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:29,133 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:29,133 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:29,139 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:29,699 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:29,699 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:29,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:29,727 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:30,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:30,266 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:30,266 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 90 [2018-04-11 10:11:30,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-04-11 10:11:30,266 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-04-11 10:11:30,267 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-04-11 10:11:30,267 INFO L87 Difference]: Start difference. First operand 228 states and 228 transitions. Second operand 91 states. [2018-04-11 10:11:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:32,406 INFO L93 Difference]: Finished difference Result 233 states and 233 transitions. [2018-04-11 10:11:32,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-04-11 10:11:32,406 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 222 [2018-04-11 10:11:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:32,408 INFO L225 Difference]: With dead ends: 233 [2018-04-11 10:11:32,408 INFO L226 Difference]: Without dead ends: 233 [2018-04-11 10:11:32,409 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3783 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2115, Invalid=6075, Unknown=0, NotChecked=0, Total=8190 [2018-04-11 10:11:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2018-04-11 10:11:32,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2018-04-11 10:11:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2018-04-11 10:11:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2018-04-11 10:11:32,415 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 222 [2018-04-11 10:11:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:32,416 INFO L459 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2018-04-11 10:11:32,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-04-11 10:11:32,416 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2018-04-11 10:11:32,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2018-04-11 10:11:32,418 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:32,418 INFO L355 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:32,418 INFO L408 AbstractCegarLoop]: === Iteration 49 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash -865231642, now seen corresponding path program 44 times [2018-04-11 10:11:32,419 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:32,419 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:32,419 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:32,419 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:32,419 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:32,432 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:33,037 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:33,037 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:33,044 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:11:33,068 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:11:33,068 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:33,070 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:33,704 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:33,704 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 92 [2018-04-11 10:11:33,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2018-04-11 10:11:33,705 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2018-04-11 10:11:33,705 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-04-11 10:11:33,705 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand 93 states. [2018-04-11 10:11:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:35,404 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2018-04-11 10:11:35,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-04-11 10:11:35,404 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 227 [2018-04-11 10:11:35,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:35,405 INFO L225 Difference]: With dead ends: 238 [2018-04-11 10:11:35,405 INFO L226 Difference]: Without dead ends: 238 [2018-04-11 10:11:35,405 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2070, Invalid=6486, Unknown=0, NotChecked=0, Total=8556 [2018-04-11 10:11:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2018-04-11 10:11:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2018-04-11 10:11:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2018-04-11 10:11:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 238 transitions. [2018-04-11 10:11:35,407 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 238 transitions. Word has length 227 [2018-04-11 10:11:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:35,407 INFO L459 AbstractCegarLoop]: Abstraction has 238 states and 238 transitions. [2018-04-11 10:11:35,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states. [2018-04-11 10:11:35,407 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 238 transitions. [2018-04-11 10:11:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2018-04-11 10:11:35,408 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:35,408 INFO L355 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:35,408 INFO L408 AbstractCegarLoop]: === Iteration 50 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:35,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1352733737, now seen corresponding path program 45 times [2018-04-11 10:11:35,409 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:35,409 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:35,409 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:35,409 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:35,410 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:35,418 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:36,006 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:36,006 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:36,011 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:11:36,307 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2018-04-11 10:11:36,307 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:36,310 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:36,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:36,358 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:36,359 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2018-04-11 10:11:36,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-04-11 10:11:36,359 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-04-11 10:11:36,359 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=1266, Unknown=0, NotChecked=0, Total=2352 [2018-04-11 10:11:36,359 INFO L87 Difference]: Start difference. First operand 238 states and 238 transitions. Second operand 49 states. [2018-04-11 10:11:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:37,184 INFO L93 Difference]: Finished difference Result 243 states and 243 transitions. [2018-04-11 10:11:37,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-04-11 10:11:37,184 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 232 [2018-04-11 10:11:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:37,185 INFO L225 Difference]: With dead ends: 243 [2018-04-11 10:11:37,185 INFO L226 Difference]: Without dead ends: 243 [2018-04-11 10:11:37,185 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3246, Invalid=5496, Unknown=0, NotChecked=0, Total=8742 [2018-04-11 10:11:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-04-11 10:11:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2018-04-11 10:11:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2018-04-11 10:11:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2018-04-11 10:11:37,187 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 232 [2018-04-11 10:11:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:37,187 INFO L459 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2018-04-11 10:11:37,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-04-11 10:11:37,187 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2018-04-11 10:11:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2018-04-11 10:11:37,188 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:37,188 INFO L355 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:37,188 INFO L408 AbstractCegarLoop]: === Iteration 51 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:37,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1337046138, now seen corresponding path program 46 times [2018-04-11 10:11:37,188 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:37,188 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:37,189 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:37,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:37,189 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:37,195 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:37,804 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:37,804 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:37,809 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:11:37,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:11:37,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:37,837 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:38,517 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:38,517 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 96 [2018-04-11 10:11:38,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2018-04-11 10:11:38,518 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2018-04-11 10:11:38,519 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-04-11 10:11:38,519 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 97 states. [2018-04-11 10:11:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:40,529 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2018-04-11 10:11:40,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-04-11 10:11:40,529 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 237 [2018-04-11 10:11:40,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:40,530 INFO L225 Difference]: With dead ends: 248 [2018-04-11 10:11:40,530 INFO L226 Difference]: Without dead ends: 248 [2018-04-11 10:11:40,531 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2352, Invalid=6960, Unknown=0, NotChecked=0, Total=9312 [2018-04-11 10:11:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-04-11 10:11:40,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2018-04-11 10:11:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2018-04-11 10:11:40,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 248 transitions. [2018-04-11 10:11:40,533 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 248 transitions. Word has length 237 [2018-04-11 10:11:40,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:40,534 INFO L459 AbstractCegarLoop]: Abstraction has 248 states and 248 transitions. [2018-04-11 10:11:40,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states. [2018-04-11 10:11:40,534 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 248 transitions. [2018-04-11 10:11:40,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2018-04-11 10:11:40,535 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:40,535 INFO L355 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:40,535 INFO L408 AbstractCegarLoop]: === Iteration 52 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash 868376887, now seen corresponding path program 47 times [2018-04-11 10:11:40,535 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:40,535 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:40,536 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:40,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:40,536 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:40,548 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:41,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:41,205 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:41,205 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:41,212 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:11:41,810 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2018-04-11 10:11:41,810 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:41,832 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:42,565 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:42,565 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 97 [2018-04-11 10:11:42,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2018-04-11 10:11:42,565 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2018-04-11 10:11:42,566 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2449, Invalid=7057, Unknown=0, NotChecked=0, Total=9506 [2018-04-11 10:11:42,566 INFO L87 Difference]: Start difference. First operand 248 states and 248 transitions. Second operand 98 states. [2018-04-11 10:11:45,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:45,190 INFO L93 Difference]: Finished difference Result 253 states and 253 transitions. [2018-04-11 10:11:45,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-04-11 10:11:45,190 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 242 [2018-04-11 10:11:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:45,191 INFO L225 Difference]: With dead ends: 253 [2018-04-11 10:11:45,191 INFO L226 Difference]: Without dead ends: 253 [2018-04-11 10:11:45,191 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4419 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2499, Invalid=7203, Unknown=0, NotChecked=0, Total=9702 [2018-04-11 10:11:45,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2018-04-11 10:11:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2018-04-11 10:11:45,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2018-04-11 10:11:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2018-04-11 10:11:45,194 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 242 [2018-04-11 10:11:45,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:45,194 INFO L459 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2018-04-11 10:11:45,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states. [2018-04-11 10:11:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2018-04-11 10:11:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2018-04-11 10:11:45,195 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:45,195 INFO L355 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:45,196 INFO L408 AbstractCegarLoop]: === Iteration 53 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:45,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1130548698, now seen corresponding path program 48 times [2018-04-11 10:11:45,196 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:45,196 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:45,196 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:45,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:45,197 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:45,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:45,208 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:45,894 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:45,894 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:45,899 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:11:46,086 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2018-04-11 10:11:46,086 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:46,089 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:46,659 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:46,659 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 68 [2018-04-11 10:11:46,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2018-04-11 10:11:46,660 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2018-04-11 10:11:46,660 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1432, Invalid=3260, Unknown=0, NotChecked=0, Total=4692 [2018-04-11 10:11:46,660 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand 69 states. [2018-04-11 10:11:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:48,656 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2018-04-11 10:11:48,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-04-11 10:11:48,656 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 247 [2018-04-11 10:11:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:48,657 INFO L225 Difference]: With dead ends: 258 [2018-04-11 10:11:48,657 INFO L226 Difference]: Without dead ends: 258 [2018-04-11 10:11:48,657 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3855, Invalid=9717, Unknown=0, NotChecked=0, Total=13572 [2018-04-11 10:11:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2018-04-11 10:11:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2018-04-11 10:11:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2018-04-11 10:11:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 258 transitions. [2018-04-11 10:11:48,659 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 258 transitions. Word has length 247 [2018-04-11 10:11:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:48,659 INFO L459 AbstractCegarLoop]: Abstraction has 258 states and 258 transitions. [2018-04-11 10:11:48,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states. [2018-04-11 10:11:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 258 transitions. [2018-04-11 10:11:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2018-04-11 10:11:48,660 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:48,660 INFO L355 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:48,660 INFO L408 AbstractCegarLoop]: === Iteration 54 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:48,660 INFO L82 PathProgramCache]: Analyzing trace with hash 869965463, now seen corresponding path program 49 times [2018-04-11 10:11:48,660 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:48,660 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:48,661 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:48,661 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:48,661 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:48,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:48,668 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:49,353 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:49,353 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:49,358 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:49,384 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:50,093 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:50,093 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 102 [2018-04-11 10:11:50,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-04-11 10:11:50,094 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-04-11 10:11:50,094 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-04-11 10:11:50,094 INFO L87 Difference]: Start difference. First operand 258 states and 258 transitions. Second operand 103 states. [2018-04-11 10:11:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:52,522 INFO L93 Difference]: Finished difference Result 263 states and 263 transitions. [2018-04-11 10:11:52,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-04-11 10:11:52,522 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 252 [2018-04-11 10:11:52,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:52,523 INFO L225 Difference]: With dead ends: 263 [2018-04-11 10:11:52,523 INFO L226 Difference]: Without dead ends: 263 [2018-04-11 10:11:52,523 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2703, Invalid=7803, Unknown=0, NotChecked=0, Total=10506 [2018-04-11 10:11:52,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2018-04-11 10:11:52,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2018-04-11 10:11:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2018-04-11 10:11:52,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2018-04-11 10:11:52,525 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 252 [2018-04-11 10:11:52,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:52,525 INFO L459 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2018-04-11 10:11:52,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-04-11 10:11:52,525 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2018-04-11 10:11:52,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2018-04-11 10:11:52,526 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:52,526 INFO L355 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:52,526 INFO L408 AbstractCegarLoop]: === Iteration 55 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash -957067066, now seen corresponding path program 50 times [2018-04-11 10:11:52,526 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:52,526 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:52,526 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:52,527 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:11:52,527 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:52,533 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:53,307 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:53,307 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:53,312 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:11:53,347 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:11:53,347 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:53,349 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:54,077 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:54,077 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 104 [2018-04-11 10:11:54,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 105 states [2018-04-11 10:11:54,078 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2018-04-11 10:11:54,079 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-04-11 10:11:54,079 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand 105 states. [2018-04-11 10:11:57,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:57,079 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2018-04-11 10:11:57,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-04-11 10:11:57,079 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 257 [2018-04-11 10:11:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:57,080 INFO L225 Difference]: With dead ends: 268 [2018-04-11 10:11:57,080 INFO L226 Difference]: Without dead ends: 268 [2018-04-11 10:11:57,080 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5047 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2756, Invalid=8164, Unknown=0, NotChecked=0, Total=10920 [2018-04-11 10:11:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2018-04-11 10:11:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2018-04-11 10:11:57,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-04-11 10:11:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 268 transitions. [2018-04-11 10:11:57,082 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 268 transitions. Word has length 257 [2018-04-11 10:11:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:57,082 INFO L459 AbstractCegarLoop]: Abstraction has 268 states and 268 transitions. [2018-04-11 10:11:57,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states. [2018-04-11 10:11:57,082 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 268 transitions. [2018-04-11 10:11:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2018-04-11 10:11:57,083 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:57,083 INFO L355 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:57,083 INFO L408 AbstractCegarLoop]: === Iteration 56 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:57,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1246602231, now seen corresponding path program 51 times [2018-04-11 10:11:57,083 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:57,083 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:57,083 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:57,084 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:57,084 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:57,090 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:11:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:57,831 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:11:57,831 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:11:57,836 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:11:58,280 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2018-04-11 10:11:58,280 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:11:58,283 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:11:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:11:58,385 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:11:58,385 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2018-04-11 10:11:58,385 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-04-11 10:11:58,385 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-04-11 10:11:58,385 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2018-04-11 10:11:58,386 INFO L87 Difference]: Start difference. First operand 268 states and 268 transitions. Second operand 55 states. [2018-04-11 10:11:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:11:59,339 INFO L93 Difference]: Finished difference Result 273 states and 273 transitions. [2018-04-11 10:11:59,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-04-11 10:11:59,339 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 262 [2018-04-11 10:11:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:11:59,340 INFO L225 Difference]: With dead ends: 273 [2018-04-11 10:11:59,340 INFO L226 Difference]: Without dead ends: 273 [2018-04-11 10:11:59,340 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4137, Invalid=6993, Unknown=0, NotChecked=0, Total=11130 [2018-04-11 10:11:59,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2018-04-11 10:11:59,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2018-04-11 10:11:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2018-04-11 10:11:59,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2018-04-11 10:11:59,343 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 262 [2018-04-11 10:11:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:11:59,343 INFO L459 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2018-04-11 10:11:59,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-04-11 10:11:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2018-04-11 10:11:59,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2018-04-11 10:11:59,344 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:11:59,344 INFO L355 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1] [2018-04-11 10:11:59,344 INFO L408 AbstractCegarLoop]: === Iteration 57 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:11:59,344 INFO L82 PathProgramCache]: Analyzing trace with hash -328358042, now seen corresponding path program 52 times [2018-04-11 10:11:59,344 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:11:59,345 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:11:59,345 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:59,345 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:11:59,345 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:11:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:11:59,357 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:00,140 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:00,140 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:00,145 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:12:00,172 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:12:00,173 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:00,175 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:00,971 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:00,971 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 108 [2018-04-11 10:12:00,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 109 states [2018-04-11 10:12:00,972 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2018-04-11 10:12:00,973 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-04-11 10:12:00,973 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand 109 states. [2018-04-11 10:12:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:03,684 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2018-04-11 10:12:03,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-04-11 10:12:03,684 INFO L78 Accepts]: Start accepts. Automaton has 109 states. Word has length 267 [2018-04-11 10:12:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:03,685 INFO L225 Difference]: With dead ends: 278 [2018-04-11 10:12:03,685 INFO L226 Difference]: Without dead ends: 278 [2018-04-11 10:12:03,686 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5346 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2862, Invalid=8910, Unknown=0, NotChecked=0, Total=11772 [2018-04-11 10:12:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2018-04-11 10:12:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2018-04-11 10:12:03,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2018-04-11 10:12:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 278 transitions. [2018-04-11 10:12:03,687 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 278 transitions. Word has length 267 [2018-04-11 10:12:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:03,688 INFO L459 AbstractCegarLoop]: Abstraction has 278 states and 278 transitions. [2018-04-11 10:12:03,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states. [2018-04-11 10:12:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 278 transitions. [2018-04-11 10:12:03,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2018-04-11 10:12:03,688 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:03,689 INFO L355 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:03,689 INFO L408 AbstractCegarLoop]: === Iteration 58 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:03,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2051109207, now seen corresponding path program 53 times [2018-04-11 10:12:03,689 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:03,689 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:03,690 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:03,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:03,690 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:03,702 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:04,650 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:04,650 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:04,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:12:05,596 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2018-04-11 10:12:05,596 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:05,601 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:06,511 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:06,512 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 109 [2018-04-11 10:12:06,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 110 states [2018-04-11 10:12:06,512 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2018-04-11 10:12:06,513 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3079, Invalid=8911, Unknown=0, NotChecked=0, Total=11990 [2018-04-11 10:12:06,513 INFO L87 Difference]: Start difference. First operand 278 states and 278 transitions. Second operand 110 states. [2018-04-11 10:12:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:10,566 INFO L93 Difference]: Finished difference Result 283 states and 283 transitions. [2018-04-11 10:12:10,566 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-04-11 10:12:10,567 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 272 [2018-04-11 10:12:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:10,567 INFO L225 Difference]: With dead ends: 283 [2018-04-11 10:12:10,567 INFO L226 Difference]: Without dead ends: 283 [2018-04-11 10:12:10,568 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5619 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3135, Invalid=9075, Unknown=0, NotChecked=0, Total=12210 [2018-04-11 10:12:10,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2018-04-11 10:12:10,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2018-04-11 10:12:10,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2018-04-11 10:12:10,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2018-04-11 10:12:10,569 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 272 [2018-04-11 10:12:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:10,569 INFO L459 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2018-04-11 10:12:10,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states. [2018-04-11 10:12:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2018-04-11 10:12:10,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2018-04-11 10:12:10,570 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:10,570 INFO L355 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:10,570 INFO L408 AbstractCegarLoop]: === Iteration 59 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:10,570 INFO L82 PathProgramCache]: Analyzing trace with hash 832779782, now seen corresponding path program 54 times [2018-04-11 10:12:10,570 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:10,571 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:10,571 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:10,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:10,571 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:10,578 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:11,399 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:11,427 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:11,432 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:12:11,738 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2018-04-11 10:12:11,738 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:11,741 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:11,852 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:11,852 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 60 [2018-04-11 10:12:11,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-11 10:12:11,853 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-11 10:12:11,853 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1558, Invalid=2102, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 10:12:11,853 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 61 states. [2018-04-11 10:12:13,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:13,020 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2018-04-11 10:12:13,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-04-11 10:12:13,020 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 277 [2018-04-11 10:12:13,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:13,021 INFO L225 Difference]: With dead ends: 288 [2018-04-11 10:12:13,021 INFO L226 Difference]: Without dead ends: 288 [2018-04-11 10:12:13,022 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4742, Invalid=8368, Unknown=0, NotChecked=0, Total=13110 [2018-04-11 10:12:13,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2018-04-11 10:12:13,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2018-04-11 10:12:13,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2018-04-11 10:12:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 288 transitions. [2018-04-11 10:12:13,023 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 288 transitions. Word has length 277 [2018-04-11 10:12:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:13,023 INFO L459 AbstractCegarLoop]: Abstraction has 288 states and 288 transitions. [2018-04-11 10:12:13,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-11 10:12:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 288 transitions. [2018-04-11 10:12:13,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2018-04-11 10:12:13,024 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:13,024 INFO L355 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:13,024 INFO L408 AbstractCegarLoop]: === Iteration 60 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:13,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1889794377, now seen corresponding path program 55 times [2018-04-11 10:12:13,024 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:13,024 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:13,025 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:13,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:13,025 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:13,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:13,032 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:13,903 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:13,903 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:13,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:12:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:13,939 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:14,758 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:14,759 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 57] total 114 [2018-04-11 10:12:14,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 115 states [2018-04-11 10:12:14,759 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2018-04-11 10:12:14,760 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-04-11 10:12:14,760 INFO L87 Difference]: Start difference. First operand 288 states and 288 transitions. Second operand 115 states. [2018-04-11 10:12:18,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:18,458 INFO L93 Difference]: Finished difference Result 293 states and 293 transitions. [2018-04-11 10:12:18,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-04-11 10:12:18,459 INFO L78 Accepts]: Start accepts. Automaton has 115 states. Word has length 282 [2018-04-11 10:12:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:18,459 INFO L225 Difference]: With dead ends: 293 [2018-04-11 10:12:18,459 INFO L226 Difference]: Without dead ends: 293 [2018-04-11 10:12:18,460 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6159 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3363, Invalid=9747, Unknown=0, NotChecked=0, Total=13110 [2018-04-11 10:12:18,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2018-04-11 10:12:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2018-04-11 10:12:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-04-11 10:12:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2018-04-11 10:12:18,462 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 282 [2018-04-11 10:12:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:18,462 INFO L459 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2018-04-11 10:12:18,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states. [2018-04-11 10:12:18,462 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2018-04-11 10:12:18,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2018-04-11 10:12:18,462 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:18,463 INFO L355 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:18,463 INFO L408 AbstractCegarLoop]: === Iteration 61 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:18,463 INFO L82 PathProgramCache]: Analyzing trace with hash 581893286, now seen corresponding path program 56 times [2018-04-11 10:12:18,463 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:18,463 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:18,463 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:18,463 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:12:18,463 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:18,472 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:19,368 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:19,368 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:19,373 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:12:19,402 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:12:19,402 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:19,405 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:20,405 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:20,405 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 116 [2018-04-11 10:12:20,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 117 states [2018-04-11 10:12:20,406 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2018-04-11 10:12:20,406 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3074, Invalid=10498, Unknown=0, NotChecked=0, Total=13572 [2018-04-11 10:12:20,406 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand 117 states. [2018-04-11 10:12:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:24,190 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2018-04-11 10:12:24,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-04-11 10:12:24,190 INFO L78 Accepts]: Start accepts. Automaton has 117 states. Word has length 287 [2018-04-11 10:12:24,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:24,191 INFO L225 Difference]: With dead ends: 298 [2018-04-11 10:12:24,191 INFO L226 Difference]: Without dead ends: 298 [2018-04-11 10:12:24,192 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3074, Invalid=10498, Unknown=0, NotChecked=0, Total=13572 [2018-04-11 10:12:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2018-04-11 10:12:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2018-04-11 10:12:24,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2018-04-11 10:12:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 298 transitions. [2018-04-11 10:12:24,193 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 298 transitions. Word has length 287 [2018-04-11 10:12:24,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:24,194 INFO L459 AbstractCegarLoop]: Abstraction has 298 states and 298 transitions. [2018-04-11 10:12:24,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states. [2018-04-11 10:12:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 298 transitions. [2018-04-11 10:12:24,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-04-11 10:12:24,195 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:24,195 INFO L355 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:24,195 INFO L408 AbstractCegarLoop]: === Iteration 62 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:24,195 INFO L82 PathProgramCache]: Analyzing trace with hash 2109957143, now seen corresponding path program 57 times [2018-04-11 10:12:24,195 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:24,196 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:24,196 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:24,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:24,196 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:24,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:24,203 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:25,133 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:25,133 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:25,138 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:12:25,803 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2018-04-11 10:12:25,803 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:25,808 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:25,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:25,899 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:25,899 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2018-04-11 10:12:25,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-04-11 10:12:25,900 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-04-11 10:12:25,900 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1716, Invalid=1944, Unknown=0, NotChecked=0, Total=3660 [2018-04-11 10:12:25,901 INFO L87 Difference]: Start difference. First operand 298 states and 298 transitions. Second operand 61 states. [2018-04-11 10:12:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:27,058 INFO L93 Difference]: Finished difference Result 303 states and 303 transitions. [2018-04-11 10:12:27,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-04-11 10:12:27,058 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 292 [2018-04-11 10:12:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:27,059 INFO L225 Difference]: With dead ends: 303 [2018-04-11 10:12:27,059 INFO L226 Difference]: Without dead ends: 303 [2018-04-11 10:12:27,060 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5136, Invalid=8670, Unknown=0, NotChecked=0, Total=13806 [2018-04-11 10:12:27,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2018-04-11 10:12:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2018-04-11 10:12:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2018-04-11 10:12:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2018-04-11 10:12:27,061 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 292 [2018-04-11 10:12:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:27,062 INFO L459 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2018-04-11 10:12:27,062 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-04-11 10:12:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2018-04-11 10:12:27,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2018-04-11 10:12:27,062 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:27,062 INFO L355 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:27,063 INFO L408 AbstractCegarLoop]: === Iteration 63 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:27,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1932196678, now seen corresponding path program 58 times [2018-04-11 10:12:27,063 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:27,063 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:27,063 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:27,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:27,063 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:27,076 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:28,064 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:28,064 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:28,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:12:28,098 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:12:28,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:28,101 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:29,022 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:29,022 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60] total 120 [2018-04-11 10:12:29,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 121 states [2018-04-11 10:12:29,023 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2018-04-11 10:12:29,023 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=10860, Unknown=0, NotChecked=0, Total=14520 [2018-04-11 10:12:29,023 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand 121 states. [2018-04-11 10:12:32,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:32,518 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2018-04-11 10:12:32,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-04-11 10:12:32,519 INFO L78 Accepts]: Start accepts. Automaton has 121 states. Word has length 297 [2018-04-11 10:12:32,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:32,519 INFO L225 Difference]: With dead ends: 308 [2018-04-11 10:12:32,519 INFO L226 Difference]: Without dead ends: 308 [2018-04-11 10:12:32,520 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3660, Invalid=10860, Unknown=0, NotChecked=0, Total=14520 [2018-04-11 10:12:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2018-04-11 10:12:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2018-04-11 10:12:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2018-04-11 10:12:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 308 transitions. [2018-04-11 10:12:32,522 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 308 transitions. Word has length 297 [2018-04-11 10:12:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:32,522 INFO L459 AbstractCegarLoop]: Abstraction has 308 states and 308 transitions. [2018-04-11 10:12:32,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states. [2018-04-11 10:12:32,522 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 308 transitions. [2018-04-11 10:12:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2018-04-11 10:12:32,523 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:32,523 INFO L355 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:32,524 INFO L408 AbstractCegarLoop]: === Iteration 64 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1038251657, now seen corresponding path program 59 times [2018-04-11 10:12:32,524 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:32,524 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:32,524 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:32,525 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:32,525 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:32,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:32,533 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:33,607 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:33,607 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:33,612 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:12:35,212 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2018-04-11 10:12:35,212 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:35,217 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:36,418 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:36,419 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 121 [2018-04-11 10:12:36,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 122 states [2018-04-11 10:12:36,419 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2018-04-11 10:12:36,420 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=10981, Unknown=0, NotChecked=0, Total=14762 [2018-04-11 10:12:36,420 INFO L87 Difference]: Start difference. First operand 308 states and 308 transitions. Second operand 122 states. [2018-04-11 10:12:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:41,480 INFO L93 Difference]: Finished difference Result 313 states and 313 transitions. [2018-04-11 10:12:41,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-04-11 10:12:41,480 INFO L78 Accepts]: Start accepts. Automaton has 122 states. Word has length 302 [2018-04-11 10:12:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:41,481 INFO L225 Difference]: With dead ends: 313 [2018-04-11 10:12:41,481 INFO L226 Difference]: Without dead ends: 313 [2018-04-11 10:12:41,482 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3843, Invalid=11163, Unknown=0, NotChecked=0, Total=15006 [2018-04-11 10:12:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2018-04-11 10:12:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2018-04-11 10:12:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2018-04-11 10:12:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2018-04-11 10:12:41,483 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 302 [2018-04-11 10:12:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:41,484 INFO L459 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2018-04-11 10:12:41,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states. [2018-04-11 10:12:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2018-04-11 10:12:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2018-04-11 10:12:41,484 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:41,484 INFO L355 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:41,484 INFO L408 AbstractCegarLoop]: === Iteration 65 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:41,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1640943130, now seen corresponding path program 60 times [2018-04-11 10:12:41,485 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:41,485 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:41,485 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:41,485 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:41,485 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:41,493 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:42,527 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:42,527 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:42,532 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:12:42,990 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2018-04-11 10:12:42,990 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:42,995 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:43,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:43,159 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:43,159 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 67 [2018-04-11 10:12:43,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-04-11 10:12:43,160 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-04-11 10:12:43,160 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=1917, Invalid=2639, Unknown=0, NotChecked=0, Total=4556 [2018-04-11 10:12:43,160 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand 68 states. [2018-04-11 10:12:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:44,742 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2018-04-11 10:12:44,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-04-11 10:12:44,743 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 307 [2018-04-11 10:12:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:44,744 INFO L225 Difference]: With dead ends: 318 [2018-04-11 10:12:44,744 INFO L226 Difference]: Without dead ends: 318 [2018-04-11 10:12:44,744 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5750, Invalid=10506, Unknown=0, NotChecked=0, Total=16256 [2018-04-11 10:12:44,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-04-11 10:12:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2018-04-11 10:12:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2018-04-11 10:12:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 318 transitions. [2018-04-11 10:12:44,747 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 318 transitions. Word has length 307 [2018-04-11 10:12:44,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:44,747 INFO L459 AbstractCegarLoop]: Abstraction has 318 states and 318 transitions. [2018-04-11 10:12:44,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states. [2018-04-11 10:12:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 318 transitions. [2018-04-11 10:12:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2018-04-11 10:12:44,748 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:44,748 INFO L355 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:44,748 INFO L408 AbstractCegarLoop]: === Iteration 66 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:44,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1047497001, now seen corresponding path program 61 times [2018-04-11 10:12:44,749 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:44,749 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:44,749 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:44,749 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:44,749 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:44,758 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:45,870 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:45,870 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:45,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:12:45,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:45,911 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:46,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:46,942 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:46,942 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 63] total 126 [2018-04-11 10:12:46,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 127 states [2018-04-11 10:12:46,943 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2018-04-11 10:12:46,943 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-04-11 10:12:46,944 INFO L87 Difference]: Start difference. First operand 318 states and 318 transitions. Second operand 127 states. [2018-04-11 10:12:49,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:49,883 INFO L93 Difference]: Finished difference Result 323 states and 323 transitions. [2018-04-11 10:12:49,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-04-11 10:12:49,883 INFO L78 Accepts]: Start accepts. Automaton has 127 states. Word has length 312 [2018-04-11 10:12:49,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:49,884 INFO L225 Difference]: With dead ends: 323 [2018-04-11 10:12:49,884 INFO L226 Difference]: Without dead ends: 323 [2018-04-11 10:12:49,885 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7563 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4095, Invalid=11907, Unknown=0, NotChecked=0, Total=16002 [2018-04-11 10:12:49,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2018-04-11 10:12:49,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2018-04-11 10:12:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2018-04-11 10:12:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2018-04-11 10:12:49,886 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 312 [2018-04-11 10:12:49,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:49,887 INFO L459 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2018-04-11 10:12:49,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states. [2018-04-11 10:12:49,887 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2018-04-11 10:12:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2018-04-11 10:12:49,887 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:49,887 INFO L355 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:49,888 INFO L408 AbstractCegarLoop]: === Iteration 67 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:49,888 INFO L82 PathProgramCache]: Analyzing trace with hash -2040815482, now seen corresponding path program 62 times [2018-04-11 10:12:49,888 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:49,888 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:49,888 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:49,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:12:49,888 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:49,898 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:51,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:51,049 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:51,050 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:51,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:12:51,089 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:12:51,089 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:51,093 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:52,128 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:52,128 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 128 [2018-04-11 10:12:52,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 129 states [2018-04-11 10:12:52,129 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2018-04-11 10:12:52,129 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12352, Unknown=0, NotChecked=0, Total=16512 [2018-04-11 10:12:52,129 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 129 states. [2018-04-11 10:12:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:12:56,769 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2018-04-11 10:12:56,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-04-11 10:12:56,769 INFO L78 Accepts]: Start accepts. Automaton has 129 states. Word has length 317 [2018-04-11 10:12:56,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:12:56,770 INFO L225 Difference]: With dead ends: 328 [2018-04-11 10:12:56,770 INFO L226 Difference]: Without dead ends: 328 [2018-04-11 10:12:56,771 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7747 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4160, Invalid=12352, Unknown=0, NotChecked=0, Total=16512 [2018-04-11 10:12:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2018-04-11 10:12:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2018-04-11 10:12:56,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2018-04-11 10:12:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 328 transitions. [2018-04-11 10:12:56,772 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 328 transitions. Word has length 317 [2018-04-11 10:12:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:12:56,773 INFO L459 AbstractCegarLoop]: Abstraction has 328 states and 328 transitions. [2018-04-11 10:12:56,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states. [2018-04-11 10:12:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 328 transitions. [2018-04-11 10:12:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2018-04-11 10:12:56,773 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:12:56,773 INFO L355 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1] [2018-04-11 10:12:56,774 INFO L408 AbstractCegarLoop]: === Iteration 68 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:12:56,774 INFO L82 PathProgramCache]: Analyzing trace with hash 700591159, now seen corresponding path program 63 times [2018-04-11 10:12:56,774 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:12:56,774 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:12:56,774 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:56,774 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:12:56,774 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:12:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:12:56,782 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:12:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:57,935 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:12:57,935 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:12:57,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:12:58,933 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2018-04-11 10:12:58,934 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:12:58,937 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:12:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:12:59,054 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:12:59,054 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-04-11 10:12:59,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-11 10:12:59,055 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-11 10:12:59,055 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2085, Invalid=2337, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:12:59,055 INFO L87 Difference]: Start difference. First operand 328 states and 328 transitions. Second operand 67 states. [2018-04-11 10:13:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:00,413 INFO L93 Difference]: Finished difference Result 333 states and 333 transitions. [2018-04-11 10:13:00,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-04-11 10:13:00,413 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 322 [2018-04-11 10:13:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:00,414 INFO L225 Difference]: With dead ends: 333 [2018-04-11 10:13:00,414 INFO L226 Difference]: Without dead ends: 333 [2018-04-11 10:13:00,415 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6243, Invalid=10527, Unknown=0, NotChecked=0, Total=16770 [2018-04-11 10:13:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2018-04-11 10:13:00,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2018-04-11 10:13:00,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2018-04-11 10:13:00,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2018-04-11 10:13:00,417 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 322 [2018-04-11 10:13:00,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:00,417 INFO L459 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2018-04-11 10:13:00,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-11 10:13:00,417 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2018-04-11 10:13:00,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2018-04-11 10:13:00,418 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:00,418 INFO L355 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:00,418 INFO L408 AbstractCegarLoop]: === Iteration 69 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:00,418 INFO L82 PathProgramCache]: Analyzing trace with hash 365184806, now seen corresponding path program 64 times [2018-04-11 10:13:00,419 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:00,419 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:00,419 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:00,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:00,419 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:00,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:00,427 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:02,181 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:02,181 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:02,187 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:13:02,228 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:13:02,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:02,232 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:02,326 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:02,345 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:02,345 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2018-04-11 10:13:02,346 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-04-11 10:13:02,346 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-04-11 10:13:02,346 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:13:02,346 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand 67 states. [2018-04-11 10:13:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:06,532 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2018-04-11 10:13:06,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-04-11 10:13:06,533 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 327 [2018-04-11 10:13:06,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:06,534 INFO L225 Difference]: With dead ends: 338 [2018-04-11 10:13:06,534 INFO L226 Difference]: Without dead ends: 338 [2018-04-11 10:13:06,534 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-04-11 10:13:06,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2018-04-11 10:13:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2018-04-11 10:13:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-04-11 10:13:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 338 transitions. [2018-04-11 10:13:06,535 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 338 transitions. Word has length 327 [2018-04-11 10:13:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:06,536 INFO L459 AbstractCegarLoop]: Abstraction has 338 states and 338 transitions. [2018-04-11 10:13:06,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-04-11 10:13:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 338 transitions. [2018-04-11 10:13:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2018-04-11 10:13:06,536 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:06,537 INFO L355 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:06,537 INFO L408 AbstractCegarLoop]: === Iteration 70 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:06,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1356376471, now seen corresponding path program 65 times [2018-04-11 10:13:06,537 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:06,537 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:06,537 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:06,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:06,537 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:06,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:06,546 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:07,788 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:07,788 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:07,793 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-04-11 10:13:09,766 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2018-04-11 10:13:09,766 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:09,772 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:11,108 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:11,108 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67] total 133 [2018-04-11 10:13:11,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 134 states [2018-04-11 10:13:11,109 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2018-04-11 10:13:11,109 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4555, Invalid=13267, Unknown=0, NotChecked=0, Total=17822 [2018-04-11 10:13:11,109 INFO L87 Difference]: Start difference. First operand 338 states and 338 transitions. Second operand 134 states. [2018-04-11 10:13:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:15,997 INFO L93 Difference]: Finished difference Result 343 states and 343 transitions. [2018-04-11 10:13:15,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2018-04-11 10:13:15,997 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 332 [2018-04-11 10:13:15,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:15,998 INFO L225 Difference]: With dead ends: 343 [2018-04-11 10:13:15,998 INFO L226 Difference]: Without dead ends: 343 [2018-04-11 10:13:15,999 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8451 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4623, Invalid=13467, Unknown=0, NotChecked=0, Total=18090 [2018-04-11 10:13:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-04-11 10:13:16,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2018-04-11 10:13:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2018-04-11 10:13:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2018-04-11 10:13:16,000 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 332 [2018-04-11 10:13:16,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:16,001 INFO L459 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2018-04-11 10:13:16,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states. [2018-04-11 10:13:16,001 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2018-04-11 10:13:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2018-04-11 10:13:16,001 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:16,002 INFO L355 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:16,002 INFO L408 AbstractCegarLoop]: === Iteration 71 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:16,002 INFO L82 PathProgramCache]: Analyzing trace with hash -570087994, now seen corresponding path program 66 times [2018-04-11 10:13:16,002 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:16,002 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:16,002 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:16,002 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:16,002 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:16,011 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:17,250 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:17,250 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:17,255 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-04-11 10:13:17,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2018-04-11 10:13:17,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:17,820 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:17,956 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:17,956 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 72 [2018-04-11 10:13:17,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-11 10:13:17,957 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-11 10:13:17,957 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2296, Invalid=2960, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 10:13:17,957 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand 73 states. [2018-04-11 10:13:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:19,546 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2018-04-11 10:13:19,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-04-11 10:13:19,546 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 337 [2018-04-11 10:13:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:19,547 INFO L225 Difference]: With dead ends: 348 [2018-04-11 10:13:19,547 INFO L226 Difference]: Without dead ends: 348 [2018-04-11 10:13:19,548 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2476 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6980, Invalid=12202, Unknown=0, NotChecked=0, Total=19182 [2018-04-11 10:13:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2018-04-11 10:13:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2018-04-11 10:13:19,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2018-04-11 10:13:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 348 transitions. [2018-04-11 10:13:19,550 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 348 transitions. Word has length 337 [2018-04-11 10:13:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:19,550 INFO L459 AbstractCegarLoop]: Abstraction has 348 states and 348 transitions. [2018-04-11 10:13:19,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-11 10:13:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 348 transitions. [2018-04-11 10:13:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2018-04-11 10:13:19,551 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:19,551 INFO L355 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:19,551 INFO L408 AbstractCegarLoop]: === Iteration 72 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1787171081, now seen corresponding path program 67 times [2018-04-11 10:13:19,551 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:19,551 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:19,552 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:19,552 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:19,552 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:19,561 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:20,898 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:20,898 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:20,903 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:13:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:20,951 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:22,147 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:22,163 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:22,164 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 69] total 138 [2018-04-11 10:13:22,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 139 states [2018-04-11 10:13:22,165 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2018-04-11 10:13:22,165 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-04-11 10:13:22,165 INFO L87 Difference]: Start difference. First operand 348 states and 348 transitions. Second operand 139 states. [2018-04-11 10:13:26,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:26,385 INFO L93 Difference]: Finished difference Result 353 states and 353 transitions. [2018-04-11 10:13:26,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-04-11 10:13:26,385 INFO L78 Accepts]: Start accepts. Automaton has 139 states. Word has length 342 [2018-04-11 10:13:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:26,386 INFO L225 Difference]: With dead ends: 353 [2018-04-11 10:13:26,386 INFO L226 Difference]: Without dead ends: 353 [2018-04-11 10:13:26,387 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9111 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4899, Invalid=14283, Unknown=0, NotChecked=0, Total=19182 [2018-04-11 10:13:26,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2018-04-11 10:13:26,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2018-04-11 10:13:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2018-04-11 10:13:26,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2018-04-11 10:13:26,389 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 342 [2018-04-11 10:13:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:26,389 INFO L459 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2018-04-11 10:13:26,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states. [2018-04-11 10:13:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2018-04-11 10:13:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2018-04-11 10:13:26,390 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:26,390 INFO L355 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:26,390 INFO L408 AbstractCegarLoop]: === Iteration 73 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:26,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1204274074, now seen corresponding path program 68 times [2018-04-11 10:13:26,390 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:26,390 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:26,391 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:26,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-04-11 10:13:26,391 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:26,400 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:27,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11526 backedges. 0 proven. 11526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:27,743 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:27,743 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:27,748 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-04-11 10:13:27,781 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-04-11 10:13:27,781 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:27,786 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:29,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11526 backedges. 0 proven. 11526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:29,070 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:29,071 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 140 [2018-04-11 10:13:29,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 141 states [2018-04-11 10:13:29,072 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2018-04-11 10:13:29,072 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=4830, Invalid=14910, Unknown=0, NotChecked=0, Total=19740 [2018-04-11 10:13:29,073 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand 141 states. [2018-04-11 10:13:32,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:32,344 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2018-04-11 10:13:32,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2018-04-11 10:13:32,345 INFO L78 Accepts]: Start accepts. Automaton has 141 states. Word has length 347 [2018-04-11 10:13:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:32,345 INFO L225 Difference]: With dead ends: 358 [2018-04-11 10:13:32,345 INFO L226 Difference]: Without dead ends: 358 [2018-04-11 10:13:32,346 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9170 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4830, Invalid=14910, Unknown=0, NotChecked=0, Total=19740 [2018-04-11 10:13:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2018-04-11 10:13:32,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2018-04-11 10:13:32,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2018-04-11 10:13:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 358 transitions. [2018-04-11 10:13:32,348 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 358 transitions. Word has length 347 [2018-04-11 10:13:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:32,348 INFO L459 AbstractCegarLoop]: Abstraction has 358 states and 358 transitions. [2018-04-11 10:13:32,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states. [2018-04-11 10:13:32,348 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 358 transitions. [2018-04-11 10:13:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2018-04-11 10:13:32,349 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:32,349 INFO L355 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:32,349 INFO L408 AbstractCegarLoop]: === Iteration 74 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1093927849, now seen corresponding path program 69 times [2018-04-11 10:13:32,349 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:32,349 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:32,350 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:32,350 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:32,350 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:32,359 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 11868 backedges. 0 proven. 11868 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:33,781 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:33,781 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:33,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-04-11 10:13:35,169 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2018-04-11 10:13:35,169 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:35,174 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 11868 backedges. 0 proven. 11868 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:35,259 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:35,259 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2018-04-11 10:13:35,260 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2018-04-11 10:13:35,260 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2018-04-11 10:13:35,260 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=2490, Invalid=2766, Unknown=0, NotChecked=0, Total=5256 [2018-04-11 10:13:35,260 INFO L87 Difference]: Start difference. First operand 358 states and 358 transitions. Second operand 73 states. [2018-04-11 10:13:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:36,818 INFO L93 Difference]: Finished difference Result 363 states and 363 transitions. [2018-04-11 10:13:36,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-04-11 10:13:36,818 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 352 [2018-04-11 10:13:36,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:36,819 INFO L225 Difference]: With dead ends: 363 [2018-04-11 10:13:36,819 INFO L226 Difference]: Without dead ends: 363 [2018-04-11 10:13:36,820 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7458, Invalid=12564, Unknown=0, NotChecked=0, Total=20022 [2018-04-11 10:13:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-04-11 10:13:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 363. [2018-04-11 10:13:36,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2018-04-11 10:13:36,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2018-04-11 10:13:36,822 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 352 [2018-04-11 10:13:36,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:36,823 INFO L459 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2018-04-11 10:13:36,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states. [2018-04-11 10:13:36,823 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2018-04-11 10:13:36,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2018-04-11 10:13:36,824 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:36,824 INFO L355 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:36,824 INFO L408 AbstractCegarLoop]: === Iteration 75 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:36,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1693944582, now seen corresponding path program 70 times [2018-04-11 10:13:36,824 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:36,824 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:36,824 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:36,824 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:36,825 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:36,834 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12215 backedges. 0 proven. 12215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:38,269 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:38,269 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:38,274 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-04-11 10:13:38,311 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-04-11 10:13:38,311 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:38,314 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12215 backedges. 0 proven. 12215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:39,640 INFO L320 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-04-11 10:13:39,640 INFO L335 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72] total 144 [2018-04-11 10:13:39,640 INFO L442 AbstractCegarLoop]: Interpolant automaton has 145 states [2018-04-11 10:13:39,641 INFO L132 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2018-04-11 10:13:39,641 INFO L133 InterpolantAutomaton]: CoverageRelationStatistics Valid=5256, Invalid=15624, Unknown=0, NotChecked=0, Total=20880 [2018-04-11 10:13:39,641 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 145 states. [2018-04-11 10:13:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-04-11 10:13:43,525 INFO L93 Difference]: Finished difference Result 368 states and 368 transitions. [2018-04-11 10:13:43,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2018-04-11 10:13:43,525 INFO L78 Accepts]: Start accepts. Automaton has 145 states. Word has length 357 [2018-04-11 10:13:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-04-11 10:13:43,526 INFO L225 Difference]: With dead ends: 368 [2018-04-11 10:13:43,526 INFO L226 Difference]: Without dead ends: 368 [2018-04-11 10:13:43,526 INFO L567 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9867 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5256, Invalid=15624, Unknown=0, NotChecked=0, Total=20880 [2018-04-11 10:13:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2018-04-11 10:13:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2018-04-11 10:13:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2018-04-11 10:13:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 368 transitions. [2018-04-11 10:13:43,528 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 368 transitions. Word has length 357 [2018-04-11 10:13:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-04-11 10:13:43,528 INFO L459 AbstractCegarLoop]: Abstraction has 368 states and 368 transitions. [2018-04-11 10:13:43,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 145 states. [2018-04-11 10:13:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 368 transitions. [2018-04-11 10:13:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2018-04-11 10:13:43,529 INFO L347 BasicCegarLoop]: Found error trace [2018-04-11 10:13:43,529 INFO L355 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1] [2018-04-11 10:13:43,530 INFO L408 AbstractCegarLoop]: === Iteration 76 === [mainErr3AssertViolationARRAY_INDEX, mainErr4AssertViolationARRAY_INDEX, mainErr1AssertViolationARRAY_INDEX, mainErr2AssertViolationARRAY_INDEX, mainErr0AssertViolationARRAY_INDEX]=== [2018-04-11 10:13:43,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1551159735, now seen corresponding path program 71 times [2018-04-11 10:13:43,530 INFO L213 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-04-11 10:13:43,530 INFO L68 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-04-11 10:13:43,530 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:43,530 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-04-11 10:13:43,530 INFO L119 rtionOrderModulation]: Craig nested/tree interpolation forces the following order [2018-04-11 10:13:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-04-11 10:13:43,540 WARN L137 erpolLogProxyWrapper]: Using partial proofs (cut at CNF-level). Set option :produce-proofs to true to get complete proofs. [2018-04-11 10:13:45,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12567 backedges. 0 proven. 12567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-04-11 10:13:45,006 INFO L308 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-04-11 10:13:45,006 INFO L213 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-04-11 10:13:45,011 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Received shutdown request... [2018-04-11 10:13:47,831 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2018-04-11 10:13:47,831 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-04-11 10:13:47,837 INFO L270 TraceCheckSpWp]: Computing forward predicates... [2018-04-11 10:13:47,838 INFO L175 TraceCheckSpWp]: Timeout while computing interpolants [2018-04-11 10:13:47,838 WARN L519 AbstractCegarLoop]: Verification canceled [2018-04-11 10:13:47,841 WARN L197 ceAbstractionStarter]: Timeout [2018-04-11 10:13:47,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.04 10:13:47 BoogieIcfgContainer [2018-04-11 10:13:47,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-04-11 10:13:47,842 INFO L168 Benchmark]: Toolchain (without parser) took 185699.29 ms. Allocated memory was 403.2 MB in the beginning and 1.4 GB in the end (delta: 1.0 GB). Free memory was 342.7 MB in the beginning and 1.0 GB in the end (delta: -675.1 MB). Peak memory consumption was 327.3 MB. Max. memory is 5.3 GB. [2018-04-11 10:13:47,843 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 403.2 MB. Free memory is still 363.4 MB. There was no memory consumed. Max. memory is 5.3 GB. [2018-04-11 10:13:47,843 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.91 ms. Allocated memory is still 403.2 MB. Free memory was 342.7 MB in the beginning and 333.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 5.3 GB. [2018-04-11 10:13:47,843 INFO L168 Benchmark]: Boogie Preprocessor took 22.79 ms. Allocated memory is still 403.2 MB. Free memory was 333.2 MB in the beginning and 331.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. [2018-04-11 10:13:47,843 INFO L168 Benchmark]: RCFGBuilder took 192.93 ms. Allocated memory was 403.2 MB in the beginning and 609.7 MB in the end (delta: 206.6 MB). Free memory was 331.9 MB in the beginning and 576.7 MB in the end (delta: -244.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 5.3 GB. [2018-04-11 10:13:47,844 INFO L168 Benchmark]: TraceAbstraction took 185304.15 ms. Allocated memory was 609.7 MB in the beginning and 1.4 GB in the end (delta: 795.9 MB). Free memory was 576.7 MB in the beginning and 1.0 GB in the end (delta: -441.1 MB). Peak memory consumption was 354.7 MB. Max. memory is 5.3 GB. [2018-04-11 10:13:47,845 INFO L344 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 403.2 MB. Free memory is still 363.4 MB. There was no memory consumed. Max. memory is 5.3 GB. * CACSL2BoogieTranslator took 176.91 ms. Allocated memory is still 403.2 MB. Free memory was 342.7 MB in the beginning and 333.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 5.3 GB. * Boogie Preprocessor took 22.79 ms. Allocated memory is still 403.2 MB. Free memory was 333.2 MB in the beginning and 331.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 5.3 GB. * RCFGBuilder took 192.93 ms. Allocated memory was 403.2 MB in the beginning and 609.7 MB in the end (delta: 206.6 MB). Free memory was 331.9 MB in the beginning and 576.7 MB in the end (delta: -244.8 MB). Peak memory consumption was 25.8 MB. Max. memory is 5.3 GB. * TraceAbstraction took 185304.15 ms. Allocated memory was 609.7 MB in the beginning and 1.4 GB in the end (delta: 795.9 MB). Free memory was 576.7 MB in the beginning and 1.0 GB in the end (delta: -441.1 MB). Peak memory consumption was 354.7 MB. Max. memory is 5.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 13). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - TimeoutResultAtElement [Line: 8]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 8). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - TimeoutResultAtElement [Line: 7]: Timeout (TraceAbstraction) Unable to prove that array index is always in bounds (line 7). Cancelled while BasicCegarLoop was analyzing trace of length 363 with TraceHistMax 72, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 3 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 5 error locations. TIMEOUT Result, 185.2s OverallTime, 76 OverallIterations, 72 TraceHistogramMax, 102.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2535 SDtfs, 16883 SDslu, 102809 SDs, 0 SdLazy, 385370 SolverSat, 2715 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16468 GetRequests, 11368 SyntacticMatches, 9 SemanticMatches, 5091 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167817 ImplicationChecksByTransitivity, 63.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=368occurred in iteration=75, 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: 0.1s AutomataMinimizationTime, 75 MinimizatonAttempts, 139 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.3s SsaConstructionTime, 13.2s SatisfiabilityAnalysisTime, 61.4s InterpolantComputationTime, 26001 NumberOfCodeBlocks, 26001 NumberOfCodeBlocksAsserted, 1386 NumberOfCheckSat, 25853 ConstructedInterpolants, 0 QuantifiedInterpolants, 21778657 SizeOfPredicates, 3 NumberOfNonLiveVariables, 28459 ConjunctsInSsa, 4388 ConjunctsInUnsatCore, 148 InterpolantComputations, 3 PerfectInterpolantSequences, 33/581536 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-Benchmark-0-2018-04-11_10-13-47-850.csv Written .csv to /home/ultimate/work/ultimate/releaseScripts/default/UAutomizer-linux/../../../releaseScripts/default/UAutomizer-linux/csv/standard_strcpy_false-valid-deref_ground.i_svcomp-DerefFreeMemtrack-32bit-Automizer_Camel.epf_AutomizerC.xml/Csv-TraceAbstractionBenchmarks-0-2018-04-11_10-13-47-850.csv Completed graceful shutdown