/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:52:56,610 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:52:56,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:52:56,664 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:52:56,665 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:52:56,667 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:52:56,669 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:52:56,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:52:56,675 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:52:56,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:52:56,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:52:56,681 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:52:56,682 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:52:56,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:52:56,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:52:56,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:52:56,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:52:56,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:52:56,715 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:52:56,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:52:56,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:52:56,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:52:56,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:52:56,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:52:56,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 16:52:56,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 16:52:56,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 16:52:56,750 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 16:52:56,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 16:52:56,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 16:52:56,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:52:56,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:52:56,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:52:56,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:52:56,763 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:52:56,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:52:56,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:52:56,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:52:56,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:52:56,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:52:56,778 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:52:56,780 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:52:56,843 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:52:56,844 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:52:56,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:52:56,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:52:56,853 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:52:56,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:52:56,853 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:52:56,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:52:56,854 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:52:56,854 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:52:56,856 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:52:56,856 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:52:56,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:52:56,857 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:52:56,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:52:56,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:52:56,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:52:56,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:52:56,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:52:56,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:52:56,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:52:56,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:52:56,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:52:56,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:52:56,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:52:57,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:52:57,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:52:57,390 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:52:57,392 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:52:57,392 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:52:57,394 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2020-12-23 16:52:57,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16cc7a76c/9a8ac007a31d414dab2624c458776003/FLAG78717cb64 [2020-12-23 16:52:58,428 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:52:58,429 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2020-12-23 16:52:58,442 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16cc7a76c/9a8ac007a31d414dab2624c458776003/FLAG78717cb64 [2020-12-23 16:52:58,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/16cc7a76c/9a8ac007a31d414dab2624c458776003 [2020-12-23 16:52:58,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:52:58,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:52:58,661 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:52:58,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:52:58,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:52:58,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:52:58" (1/1) ... [2020-12-23 16:52:58,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b635e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:58, skipping insertion in model container [2020-12-23 16:52:58,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:52:58" (1/1) ... [2020-12-23 16:52:58,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:52:58,747 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[~to,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:52:59,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:52:59,150 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[~to,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:52:59,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:52:59,297 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:52:59,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59 WrapperNode [2020-12-23 16:52:59,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:52:59,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:52:59,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:52:59,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:52:59,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,325 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:52:59,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:52:59,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:52:59,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:52:59,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,366 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,381 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... [2020-12-23 16:52:59,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:52:59,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:52:59,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:52:59,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:52:59,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 16:52:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:52:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:52:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:52:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:52:59,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:52:59,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:52:59,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:52:59,978 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-23 16:52:59,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:52:59 BoogieIcfgContainer [2020-12-23 16:52:59,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:52:59,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:52:59,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:52:59,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:52:59,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:52:58" (1/3) ... [2020-12-23 16:52:59,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752f058b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:52:59, skipping insertion in model container [2020-12-23 16:52:59,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:59" (2/3) ... [2020-12-23 16:52:59,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@752f058b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:52:59, skipping insertion in model container [2020-12-23 16:52:59,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:52:59" (3/3) ... [2020-12-23 16:52:59,993 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2020-12-23 16:53:00,002 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:00,008 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 9 error locations. [2020-12-23 16:53:00,032 INFO L253 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2020-12-23 16:53:00,076 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:00,077 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:00,077 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:00,077 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:00,077 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:00,077 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:00,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:00,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:00,105 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-23 16:53:00,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:53:00,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:00,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:53:00,114 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:00,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2020-12-23 16:53:00,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:00,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774642079] [2020-12-23 16:53:00,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:00,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:00,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774642079] [2020-12-23 16:53:00,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:00,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:00,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131476794] [2020-12-23 16:53:00,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:00,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:00,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:00,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:00,473 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-12-23 16:53:00,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:00,594 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-12-23 16:53:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:00,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 16:53:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:00,621 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:53:00,621 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:53:00,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:00,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:53:00,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-12-23 16:53:00,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 16:53:00,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2020-12-23 16:53:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:00,670 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 16:53:00,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:00,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 16:53:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:53:00,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:00,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:53:00,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:00,674 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:00,679 INFO L82 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2020-12-23 16:53:00,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:00,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985761808] [2020-12-23 16:53:00,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:00,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:00,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985761808] [2020-12-23 16:53:00,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:00,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:00,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032295093] [2020-12-23 16:53:00,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:00,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:00,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:00,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:00,757 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2020-12-23 16:53:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:00,816 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-12-23 16:53:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:00,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 16:53:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:00,818 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:53:00,818 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:53:00,819 INFO L677 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 [2020-12-23 16:53:00,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:53:00,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 16:53:00,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:53:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-23 16:53:00,824 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2020-12-23 16:53:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:00,825 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-23 16:53:00,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-23 16:53:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:00,826 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:00,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:00,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:00,827 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:00,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:00,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2020-12-23 16:53:00,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:00,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57623478] [2020-12-23 16:53:00,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:00,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:00,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57623478] [2020-12-23 16:53:00,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:00,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:00,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898997324] [2020-12-23 16:53:00,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:00,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:00,885 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 3 states. [2020-12-23 16:53:00,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:00,933 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-12-23 16:53:00,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:00,935 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:00,936 INFO L225 Difference]: With dead ends: 25 [2020-12-23 16:53:00,936 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 16:53:00,937 INFO L677 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 [2020-12-23 16:53:00,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 16:53:00,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-23 16:53:00,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 16:53:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-23 16:53:00,942 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2020-12-23 16:53:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:00,942 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-23 16:53:00,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-23 16:53:00,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:00,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:00,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:00,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:53:00,944 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:00,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:00,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2020-12-23 16:53:00,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:00,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381878674] [2020-12-23 16:53:00,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:01,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381878674] [2020-12-23 16:53:01,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:01,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:01,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068935019] [2020-12-23 16:53:01,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:01,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:01,075 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-12-23 16:53:01,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:01,167 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2020-12-23 16:53:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:01,168 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:01,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:01,170 INFO L225 Difference]: With dead ends: 24 [2020-12-23 16:53:01,171 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 16:53:01,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 16:53:01,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-23 16:53:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:53:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-12-23 16:53:01,179 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2020-12-23 16:53:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:01,180 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-12-23 16:53:01,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-12-23 16:53:01,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:01,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:01,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:01,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:53:01,183 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2020-12-23 16:53:01,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:01,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371268860] [2020-12-23 16:53:01,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:01,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371268860] [2020-12-23 16:53:01,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:01,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:01,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957966819] [2020-12-23 16:53:01,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:01,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:01,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:01,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:01,292 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-12-23 16:53:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:01,335 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-12-23 16:53:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:01,336 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:01,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:01,337 INFO L225 Difference]: With dead ends: 40 [2020-12-23 16:53:01,337 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 16:53:01,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 16:53:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-12-23 16:53:01,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:53:01,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 16:53:01,343 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2020-12-23 16:53:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:01,343 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 16:53:01,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 16:53:01,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:01,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:01,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:01,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:53:01,345 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2020-12-23 16:53:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:01,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970484197] [2020-12-23 16:53:01,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:01,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970484197] [2020-12-23 16:53:01,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:01,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:01,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977392261] [2020-12-23 16:53:01,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:01,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:01,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:01,444 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-12-23 16:53:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:01,569 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-23 16:53:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:01,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:53:01,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:01,572 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:53:01,572 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:53:01,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:01,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:53:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2020-12-23 16:53:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 16:53:01,577 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2020-12-23 16:53:01,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:01,578 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 16:53:01,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 16:53:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:01,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:01,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:53:01,580 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash -530059845, now seen corresponding path program 1 times [2020-12-23 16:53:01,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:01,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608173538] [2020-12-23 16:53:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:01,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608173538] [2020-12-23 16:53:01,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:01,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:01,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379321210] [2020-12-23 16:53:01,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:01,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:01,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:01,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:01,659 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-12-23 16:53:01,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:01,728 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-23 16:53:01,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:01,729 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:53:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:01,730 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:53:01,730 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:53:01,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:01,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:53:01,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 16:53:01,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:53:01,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 16:53:01,735 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2020-12-23 16:53:01,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:01,736 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 16:53:01,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:01,736 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 16:53:01,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:01,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:01,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:01,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:53:01,737 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash -530059844, now seen corresponding path program 1 times [2020-12-23 16:53:01,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:01,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133263677] [2020-12-23 16:53:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:01,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133263677] [2020-12-23 16:53:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:01,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:01,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131162401] [2020-12-23 16:53:01,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:01,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:01,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:01,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:01,859 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-12-23 16:53:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:01,978 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-12-23 16:53:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:01,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-23 16:53:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:01,980 INFO L225 Difference]: With dead ends: 37 [2020-12-23 16:53:01,980 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 16:53:01,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:01,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 16:53:01,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-12-23 16:53:01,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:01,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 16:53:01,984 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2020-12-23 16:53:01,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:01,985 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 16:53:01,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:01,985 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 16:53:01,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:53:01,985 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:01,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:01,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:53:01,986 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:01,987 INFO L82 PathProgramCache]: Analyzing trace with hash 748014006, now seen corresponding path program 1 times [2020-12-23 16:53:01,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:01,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389222782] [2020-12-23 16:53:01,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:02,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389222782] [2020-12-23 16:53:02,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:02,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:02,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549121941] [2020-12-23 16:53:02,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:02,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:02,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:02,061 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-12-23 16:53:02,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:02,106 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-12-23 16:53:02,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:02,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 16:53:02,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:02,108 INFO L225 Difference]: With dead ends: 27 [2020-12-23 16:53:02,108 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 16:53:02,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 16:53:02,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-23 16:53:02,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 16:53:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-23 16:53:02,111 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2020-12-23 16:53:02,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:02,112 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-23 16:53:02,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:02,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-23 16:53:02,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:53:02,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:02,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:02,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:53:02,113 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:02,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:02,114 INFO L82 PathProgramCache]: Analyzing trace with hash 748014007, now seen corresponding path program 1 times [2020-12-23 16:53:02,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:02,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116057097] [2020-12-23 16:53:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:02,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116057097] [2020-12-23 16:53:02,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:02,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:02,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575992490] [2020-12-23 16:53:02,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:02,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:02,176 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-12-23 16:53:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:02,235 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-23 16:53:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:02,236 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-23 16:53:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:02,236 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:53:02,237 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:53:02,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:53:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2020-12-23 16:53:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:53:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 16:53:02,241 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2020-12-23 16:53:02,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:02,241 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 16:53:02,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:02,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 16:53:02,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:02,242 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:02,242 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:02,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:53:02,243 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:02,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:02,243 INFO L82 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2020-12-23 16:53:02,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:02,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028429600] [2020-12-23 16:53:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:02,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028429600] [2020-12-23 16:53:02,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:02,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:02,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880518989] [2020-12-23 16:53:02,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:02,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:02,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:02,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:02,288 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-12-23 16:53:02,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:02,330 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2020-12-23 16:53:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:02,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 16:53:02,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:02,333 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:53:02,333 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:53:02,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:02,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:53:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2020-12-23 16:53:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:53:02,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-12-23 16:53:02,346 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2020-12-23 16:53:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:02,347 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-12-23 16:53:02,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-12-23 16:53:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:02,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:02,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:02,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:53:02,349 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:02,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2020-12-23 16:53:02,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:02,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638962462] [2020-12-23 16:53:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638962462] [2020-12-23 16:53:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289258210] [2020-12-23 16:53:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:02,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:02,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:02,587 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:02,588 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:02,591 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:02,613 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:53:02,616 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:02,617 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-23 16:53:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:02,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:02,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:02,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410439921] [2020-12-23 16:53:02,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:02,732 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2020-12-23 16:53:02,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:02,830 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-12-23 16:53:02,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:02,831 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:02,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:02,832 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:53:02,833 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:53:02,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:02,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:53:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 26. [2020-12-23 16:53:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:53:02,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-12-23 16:53:02,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2020-12-23 16:53:02,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:02,837 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-12-23 16:53:02,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-12-23 16:53:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:02,838 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:02,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:03,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:53:03,045 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:03,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1794944983, now seen corresponding path program 1 times [2020-12-23 16:53:03,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:03,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246576054] [2020-12-23 16:53:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:03,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246576054] [2020-12-23 16:53:03,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:03,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:53:03,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100116279] [2020-12-23 16:53:03,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:03,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:03,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:03,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:03,229 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 7 states. [2020-12-23 16:53:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:03,370 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-12-23 16:53:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:03,371 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:53:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:03,371 INFO L225 Difference]: With dead ends: 37 [2020-12-23 16:53:03,371 INFO L226 Difference]: Without dead ends: 37 [2020-12-23 16:53:03,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-23 16:53:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2020-12-23 16:53:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:53:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 16:53:03,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2020-12-23 16:53:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:03,375 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 16:53:03,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 16:53:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:03,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:03,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:53:03,377 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:03,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1401917973, now seen corresponding path program 1 times [2020-12-23 16:53:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604154414] [2020-12-23 16:53:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:03,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604154414] [2020-12-23 16:53:03,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:03,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:53:03,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127240536] [2020-12-23 16:53:03,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:03,482 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-12-23 16:53:03,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:03,671 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-12-23 16:53:03,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:03,671 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 16:53:03,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:03,672 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:53:03,672 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:53:03,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:53:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2020-12-23 16:53:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:53:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-12-23 16:53:03,676 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2020-12-23 16:53:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:03,676 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-12-23 16:53:03,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-12-23 16:53:03,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:03,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:03,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:03,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 16:53:03,678 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:03,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:03,678 INFO L82 PathProgramCache]: Analyzing trace with hash 2102982551, now seen corresponding path program 1 times [2020-12-23 16:53:03,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:03,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589255937] [2020-12-23 16:53:03,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:03,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589255937] [2020-12-23 16:53:03,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:03,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:53:03,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6656073] [2020-12-23 16:53:03,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:03,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:03,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:03,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:03,856 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-12-23 16:53:04,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:04,005 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-23 16:53:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:04,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-23 16:53:04,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:04,006 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:53:04,007 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:53:04,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:04,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:53:04,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2020-12-23 16:53:04,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:53:04,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-12-23 16:53:04,010 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2020-12-23 16:53:04,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:04,011 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-12-23 16:53:04,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:04,011 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-12-23 16:53:04,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:04,012 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:04,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:04,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:53:04,012 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:04,013 INFO L82 PathProgramCache]: Analyzing trace with hash -191335553, now seen corresponding path program 1 times [2020-12-23 16:53:04,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:04,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760480498] [2020-12-23 16:53:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:04,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760480498] [2020-12-23 16:53:04,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:04,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:04,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403633981] [2020-12-23 16:53:04,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:04,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:04,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:04,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:04,077 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2020-12-23 16:53:04,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:04,099 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-12-23 16:53:04,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:04,099 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 16:53:04,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:04,100 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:53:04,100 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 16:53:04,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:04,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 16:53:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-23 16:53:04,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 16:53:04,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-23 16:53:04,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2020-12-23 16:53:04,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:04,103 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-23 16:53:04,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:04,103 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-23 16:53:04,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:04,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:04,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:04,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:53:04,104 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:04,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:04,105 INFO L82 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2020-12-23 16:53:04,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:04,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320186388] [2020-12-23 16:53:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:04,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320186388] [2020-12-23 16:53:04,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833987208] [2020-12-23 16:53:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 16:53:04,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:04,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:04,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:04,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-12-23 16:53:04,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941677229] [2020-12-23 16:53:04,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:53:04,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:04,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:53:04,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:04,383 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2020-12-23 16:53:04,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:04,517 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-23 16:53:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:04,518 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-23 16:53:04,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:04,518 INFO L225 Difference]: With dead ends: 30 [2020-12-23 16:53:04,518 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 16:53:04,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 16:53:04,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2020-12-23 16:53:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 16:53:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-23 16:53:04,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2020-12-23 16:53:04,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:04,521 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-23 16:53:04,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:53:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-23 16:53:04,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:04,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:04,522 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:04,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:53:04,736 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:04,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:04,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2114514791, now seen corresponding path program 1 times [2020-12-23 16:53:04,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:04,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875946438] [2020-12-23 16:53:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:04,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:04,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875946438] [2020-12-23 16:53:04,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752829297] [2020-12-23 16:53:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 16:53:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:04,968 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_13|], 1=[|v_#valid_20|]} [2020-12-23 16:53:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:04,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:04,979 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:05,010 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:05,020 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:05,024 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:05,036 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:05,040 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:05,040 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:05,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:05,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:05,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 16:53:05,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049513646] [2020-12-23 16:53:05,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 16:53:05,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 16:53:05,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:05,323 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 12 states. [2020-12-23 16:53:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:05,754 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-23 16:53:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:05,755 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-12-23 16:53:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:05,755 INFO L225 Difference]: With dead ends: 29 [2020-12-23 16:53:05,756 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 16:53:05,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:53:05,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 16:53:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-12-23 16:53:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 16:53:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-23 16:53:05,758 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2020-12-23 16:53:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:05,758 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-23 16:53:05,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 16:53:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-23 16:53:05,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:05,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:05,759 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:53:05,968 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:05,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash 775185845, now seen corresponding path program 2 times [2020-12-23 16:53:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835116279] [2020-12-23 16:53:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835116279] [2020-12-23 16:53:06,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089888468] [2020-12-23 16:53:06,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:06,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:06,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 16:53:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:06,443 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:06,445 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,450 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,451 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:06,506 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:06,507 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:06,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2020-12-23 16:53:06,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:06,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,698 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:06,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:27 [2020-12-23 16:53:06,844 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,845 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:53:06,848 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:06,861 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,865 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:06,870 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:53:06,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:53:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:07,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:07,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2020-12-23 16:53:07,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199409836] [2020-12-23 16:53:07,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:53:07,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:07,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:53:07,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:53:07,003 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 22 states. [2020-12-23 16:53:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,682 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-12-23 16:53:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:53:08,682 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 21 [2020-12-23 16:53:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,683 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:53:08,683 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 16:53:08,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:53:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 16:53:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-12-23 16:53:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 16:53:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-12-23 16:53:08,687 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 21 [2020-12-23 16:53:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,687 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-12-23 16:53:08,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:53:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-12-23 16:53:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:53:08,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,688 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:08,900 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1518290629, now seen corresponding path program 2 times [2020-12-23 16:53:08,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314864093] [2020-12-23 16:53:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314864093] [2020-12-23 16:53:09,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476024130] [2020-12-23 16:53:09,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:09,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:09,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:09,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:53:09,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:09,122 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_14|], 1=[|v_#valid_22|]} [2020-12-23 16:53:09,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:09,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:09,130 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:09,142 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:09,148 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:09,150 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:09,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:09,167 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:09,168 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:09,513 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:09,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2020-12-23 16:53:09,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258790584] [2020-12-23 16:53:09,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:09,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:09,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:09,516 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 15 states. [2020-12-23 16:53:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,020 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-12-23 16:53:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:10,021 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 16:53:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,021 INFO L225 Difference]: With dead ends: 34 [2020-12-23 16:53:10,022 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 16:53:10,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:10,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 16:53:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-12-23 16:53:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:53:10,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-23 16:53:10,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2020-12-23 16:53:10,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,026 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-23 16:53:10,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-23 16:53:10,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:53:10,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,028 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:10,232 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1095540269, now seen corresponding path program 3 times [2020-12-23 16:53:10,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181023942] [2020-12-23 16:53:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:10,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181023942] [2020-12-23 16:53:10,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207550144] [2020-12-23 16:53:10,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:10,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:10,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:10,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:53:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:10,573 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:10,577 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,582 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:10,583 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,584 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:10,716 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:10,717 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:10,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:10,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:10,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:10,827 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,838 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:10,841 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:10,842 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:53:10,909 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:10,910 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,917 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:10,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:25, output treesize:9 [2020-12-23 16:53:10,951 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:53:10,952 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:10,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:10,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:10,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:10,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2020-12-23 16:53:10,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920330611] [2020-12-23 16:53:10,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:53:10,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:53:10,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:10,964 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 20 states. [2020-12-23 16:53:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:11,393 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-12-23 16:53:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:53:11,394 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 29 [2020-12-23 16:53:11,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:11,395 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:53:11,395 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 16:53:11,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:53:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 16:53:11,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-12-23 16:53:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-23 16:53:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-12-23 16:53:11,400 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2020-12-23 16:53:11,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:11,400 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-12-23 16:53:11,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:53:11,400 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-12-23 16:53:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:53:11,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:11,401 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:11,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:11,614 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:11,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 4 times [2020-12-23 16:53:11,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:11,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141003197] [2020-12-23 16:53:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141003197] [2020-12-23 16:53:11,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612687640] [2020-12-23 16:53:11,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:11,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:11,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:11,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 16:53:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:11,917 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_15|], 1=[|v_#valid_24|]} [2020-12-23 16:53:11,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:11,927 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:11,928 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,938 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,952 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:11,954 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,964 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,966 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,966 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:12,107 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:12,108 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,116 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:12,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 16:53:12,225 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:12,226 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:12,239 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,240 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:12,294 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:12,296 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,307 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:12,309 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,309 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:23 [2020-12-23 16:53:12,400 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:12,400 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:53:12,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:12,417 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:12,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:12,419 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:53:12,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:12,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:12,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2020-12-23 16:53:12,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692015285] [2020-12-23 16:53:12,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:12,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:12,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:12,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:12,551 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 24 states. [2020-12-23 16:53:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:13,480 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-12-23 16:53:13,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:13,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 33 [2020-12-23 16:53:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:13,484 INFO L225 Difference]: With dead ends: 43 [2020-12-23 16:53:13,484 INFO L226 Difference]: Without dead ends: 43 [2020-12-23 16:53:13,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-23 16:53:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-12-23 16:53:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 16:53:13,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-12-23 16:53:13,487 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 33 [2020-12-23 16:53:13,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:13,487 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-12-23 16:53:13,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:13,488 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-12-23 16:53:13,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 16:53:13,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:13,489 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:13,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:13,703 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:13,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:13,703 INFO L82 PathProgramCache]: Analyzing trace with hash 651531229, now seen corresponding path program 3 times [2020-12-23 16:53:13,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:13,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766451676] [2020-12-23 16:53:13,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:13,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766451676] [2020-12-23 16:53:13,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323734549] [2020-12-23 16:53:13,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:13,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:13,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:53:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:13,961 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_16|], 1=[|v_#valid_25|]} [2020-12-23 16:53:13,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:13,968 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:13,969 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,981 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,988 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:13,990 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:14,001 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:14,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:14,003 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:14,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:14,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2020-12-23 16:53:14,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466417760] [2020-12-23 16:53:14,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:53:14,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:14,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:53:14,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:14,454 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 19 states. [2020-12-23 16:53:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:15,261 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2020-12-23 16:53:15,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:15,262 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 34 [2020-12-23 16:53:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:15,264 INFO L225 Difference]: With dead ends: 42 [2020-12-23 16:53:15,264 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 16:53:15,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 16:53:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-12-23 16:53:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-23 16:53:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-12-23 16:53:15,269 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 34 [2020-12-23 16:53:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:15,269 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-12-23 16:53:15,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:53:15,270 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-12-23 16:53:15,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:53:15,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:15,271 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:15,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:53:15,485 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:15,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:15,486 INFO L82 PathProgramCache]: Analyzing trace with hash 809626609, now seen corresponding path program 5 times [2020-12-23 16:53:15,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:15,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250982236] [2020-12-23 16:53:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:15,819 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:15,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250982236] [2020-12-23 16:53:15,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063878529] [2020-12-23 16:53:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:15,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:53:15,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:15,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 16:53:15,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:15,938 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:15,939 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,944 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,944 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,944 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:16,116 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:16,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,125 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,127 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:16,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:16,232 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:16,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,247 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:16,247 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:53:16,289 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:16,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,297 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,299 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,299 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:16,317 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:16,320 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:25, output treesize:9 [2020-12-23 16:53:16,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:53:16,365 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,366 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,367 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:16,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:16,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-23 16:53:16,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586280513] [2020-12-23 16:53:16,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:16,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:16,378 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 23 states. [2020-12-23 16:53:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:17,049 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-12-23 16:53:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:53:17,050 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2020-12-23 16:53:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:17,051 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:53:17,051 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:53:17,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:53:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:53:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2020-12-23 16:53:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-23 16:53:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-23 16:53:17,053 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2020-12-23 16:53:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:17,054 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-23 16:53:17,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-23 16:53:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 16:53:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:17,055 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:17,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:17,270 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:17,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1647975924, now seen corresponding path program 6 times [2020-12-23 16:53:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:17,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519645133] [2020-12-23 16:53:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:17,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519645133] [2020-12-23 16:53:17,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623368033] [2020-12-23 16:53:17,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:17,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:53:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:17,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:53:17,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:17,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:17,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-23 16:53:17,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137550900] [2020-12-23 16:53:17,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:53:17,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:17,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:53:17,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:17,837 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 20 states. [2020-12-23 16:53:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:18,220 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2020-12-23 16:53:18,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:18,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-12-23 16:53:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:18,221 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:53:18,222 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:53:18,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:53:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-12-23 16:53:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:53:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-12-23 16:53:18,225 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 41 [2020-12-23 16:53:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:18,225 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-12-23 16:53:18,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:53:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-12-23 16:53:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:53:18,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:18,227 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:18,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:18,441 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:18,442 INFO L82 PathProgramCache]: Analyzing trace with hash -452353921, now seen corresponding path program 4 times [2020-12-23 16:53:18,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:18,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838158257] [2020-12-23 16:53:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:18,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838158257] [2020-12-23 16:53:18,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465745054] [2020-12-23 16:53:18,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:18,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:18,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:18,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:53:18,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:18,746 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_17|], 1=[|v_#valid_27|]} [2020-12-23 16:53:18,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:18,752 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:18,753 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:18,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:18,769 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:18,770 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:18,780 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:18,781 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:18,782 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:15 [2020-12-23 16:53:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:53:19,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:19,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2020-12-23 16:53:19,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025965068] [2020-12-23 16:53:19,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:53:19,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:19,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:53:19,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:19,152 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2020-12-23 16:53:20,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:20,325 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2020-12-23 16:53:20,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:20,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-12-23 16:53:20,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:20,326 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:53:20,326 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:53:20,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:53:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:53:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-12-23 16:53:20,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-12-23 16:53:20,329 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2020-12-23 16:53:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:20,329 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-12-23 16:53:20,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:53:20,330 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-12-23 16:53:20,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 16:53:20,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:20,333 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:20,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:53:20,542 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:20,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:20,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1531708431, now seen corresponding path program 7 times [2020-12-23 16:53:20,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:20,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179850862] [2020-12-23 16:53:20,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:20,852 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:20,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179850862] [2020-12-23 16:53:20,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047082347] [2020-12-23 16:53:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:53:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:20,945 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:20,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:20,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:20,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:20,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:21,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:21,175 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,183 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,185 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:21,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:21,296 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:21,298 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,310 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:21,310 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:53:21,351 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:21,353 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:21,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:21,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,380 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,380 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:21,397 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:21,398 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,404 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,406 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,406 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:25, output treesize:9 [2020-12-23 16:53:21,441 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:53:21,442 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,444 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,444 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:21,455 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:21,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:21,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 26 [2020-12-23 16:53:21,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465258348] [2020-12-23 16:53:21,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:53:21,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:21,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:53:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=588, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:21,457 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 26 states. [2020-12-23 16:53:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:22,337 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-12-23 16:53:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:53:22,337 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-12-23 16:53:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:22,338 INFO L225 Difference]: With dead ends: 76 [2020-12-23 16:53:22,338 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 16:53:22,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:53:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 16:53:22,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-23 16:53:22,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:53:22,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-12-23 16:53:22,341 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2020-12-23 16:53:22,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:22,341 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-12-23 16:53:22,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:53:22,341 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-12-23 16:53:22,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:53:22,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:22,342 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:22,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 16:53:22,551 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:22,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:22,552 INFO L82 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 8 times [2020-12-23 16:53:22,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:22,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30084766] [2020-12-23 16:53:22,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:22,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30084766] [2020-12-23 16:53:22,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540116567] [2020-12-23 16:53:22,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:22,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:22,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:22,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:53:22,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:23,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:23,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-23 16:53:23,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705394492] [2020-12-23 16:53:23,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:23,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:23,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:23,144 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 24 states. [2020-12-23 16:53:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:23,637 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-12-23 16:53:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:23,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2020-12-23 16:53:23,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:23,638 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:53:23,638 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:53:23,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:23,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:53:23,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-12-23 16:53:23,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:53:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-12-23 16:53:23,641 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2020-12-23 16:53:23,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:23,641 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-12-23 16:53:23,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:23,641 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-12-23 16:53:23,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:53:23,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,642 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:23,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:53:23,856 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:23,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:23,857 INFO L82 PathProgramCache]: Analyzing trace with hash -936321247, now seen corresponding path program 5 times [2020-12-23 16:53:23,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:23,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786489134] [2020-12-23 16:53:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:24,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786489134] [2020-12-23 16:53:24,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515012282] [2020-12-23 16:53:24,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:24,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 16:53:24,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:24,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 16:53:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:24,244 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_18|], 1=[|v_#valid_29|]} [2020-12-23 16:53:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:24,250 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:24,251 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,268 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:24,270 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,281 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:24,283 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:25,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:25,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2020-12-23 16:53:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640578620] [2020-12-23 16:53:25,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:25,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:25,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:25,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:25,067 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 27 states. [2020-12-23 16:53:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:26,315 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-12-23 16:53:26,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:26,316 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 50 [2020-12-23 16:53:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:26,316 INFO L225 Difference]: With dead ends: 58 [2020-12-23 16:53:26,317 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 16:53:26,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 16:53:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-12-23 16:53:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:53:26,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-23 16:53:26,321 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2020-12-23 16:53:26,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:26,321 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-23 16:53:26,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:26,321 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-23 16:53:26,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:53:26,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,322 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:26,529 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1866312237, now seen corresponding path program 9 times [2020-12-23 16:53:26,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709394711] [2020-12-23 16:53:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:26,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709394711] [2020-12-23 16:53:26,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523637662] [2020-12-23 16:53:26,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:27,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:53:27,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 16:53:27,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:27,116 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:27,117 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,122 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:27,454 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:27,455 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,466 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,468 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:27,469 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:27,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:27,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:27,621 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:53:27,662 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:27,664 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,672 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:27,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:27,683 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,690 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,691 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,692 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:27,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:27,705 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:27,725 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:27,727 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,734 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,736 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,736 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:53:27,745 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:53:27,747 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:27,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:27,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-23 16:53:27,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254505960] [2020-12-23 16:53:27,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:53:27,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:53:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:53:27,767 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 28 states. [2020-12-23 16:53:28,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,760 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-12-23 16:53:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:53:28,761 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-12-23 16:53:28,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,761 INFO L225 Difference]: With dead ends: 88 [2020-12-23 16:53:28,761 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:53:28,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:53:28,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-12-23 16:53:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:53:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-12-23 16:53:28,764 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 53 [2020-12-23 16:53:28,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,764 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-12-23 16:53:28,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:53:28,765 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-12-23 16:53:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:53:28,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,765 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:28,966 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,967 INFO L82 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 10 times [2020-12-23 16:53:28,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496646460] [2020-12-23 16:53:28,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:29,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496646460] [2020-12-23 16:53:29,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389987697] [2020-12-23 16:53:29,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:29,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:29,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 16:53:29,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:29,404 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_19|], 1=[|v_#valid_31|]} [2020-12-23 16:53:29,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:29,409 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:29,410 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:29,425 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,433 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,435 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,435 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:29,755 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:29,756 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,765 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 16:53:29,918 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:29,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,932 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,934 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,934 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:30,003 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:30,004 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:30,098 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:30,100 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,112 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,113 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,114 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:30,187 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:30,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,203 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:30,273 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:30,275 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,289 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:23 [2020-12-23 16:53:30,417 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,417 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:53:30,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:30,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,439 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,440 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:53:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:30,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 35 [2020-12-23 16:53:30,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693124897] [2020-12-23 16:53:30,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:53:30,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:53:30,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:53:30,660 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 36 states. [2020-12-23 16:53:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:32,403 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-12-23 16:53:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:53:32,404 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 57 [2020-12-23 16:53:32,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:32,405 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:53:32,405 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:53:32,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:53:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:53:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-12-23 16:53:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 16:53:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-12-23 16:53:32,408 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2020-12-23 16:53:32,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:32,409 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-12-23 16:53:32,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:53:32,409 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-12-23 16:53:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:53:32,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:32,410 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:32,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:32,612 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1096765379, now seen corresponding path program 6 times [2020-12-23 16:53:32,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:32,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607790341] [2020-12-23 16:53:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607790341] [2020-12-23 16:53:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736942309] [2020-12-23 16:53:32,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:33,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 16:53:33,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:33,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 16:53:33,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:33,135 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_20|], 1=[|v_#valid_32|]} [2020-12-23 16:53:33,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:33,141 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:33,143 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,158 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,165 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:33,167 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,184 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:33,184 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:34,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2020-12-23 16:53:34,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266367161] [2020-12-23 16:53:34,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:53:34,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:53:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:34,219 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 31 states. [2020-12-23 16:53:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:35,965 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2020-12-23 16:53:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:53:35,966 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 58 [2020-12-23 16:53:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:35,967 INFO L225 Difference]: With dead ends: 66 [2020-12-23 16:53:35,967 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 16:53:35,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=366, Invalid=1614, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:53:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 16:53:35,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-12-23 16:53:35,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:53:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2020-12-23 16:53:35,971 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2020-12-23 16:53:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:35,971 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2020-12-23 16:53:35,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:53:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2020-12-23 16:53:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:53:35,972 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:35,972 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:36,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 16:53:36,178 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:36,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1921179211, now seen corresponding path program 11 times [2020-12-23 16:53:36,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:36,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808697395] [2020-12-23 16:53:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:36,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808697395] [2020-12-23 16:53:36,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350782644] [2020-12-23 16:53:36,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:53:36,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:36,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 16:53:36,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:36,970 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_33|]} [2020-12-23 16:53:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:36,975 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:36,976 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:36,986 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:36,991 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:36,993 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,004 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,005 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:37,327 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:37,328 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,337 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,337 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:53:37,459 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:53:37,460 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,472 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:25 [2020-12-23 16:53:37,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:37,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,567 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,568 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,568 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:53:37,638 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:37,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,650 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:53:37,718 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:37,719 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,732 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,732 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:53:37,819 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:37,821 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,833 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,833 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:53:37,920 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:37,921 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,934 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,936 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,936 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2020-12-23 16:53:38,094 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:38,095 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:53:38,096 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:38,109 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:38,111 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:38,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 45 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:38,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:38,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 39 [2020-12-23 16:53:38,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737564651] [2020-12-23 16:53:38,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:53:38,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:38,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:53:38,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:38,350 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand 39 states. [2020-12-23 16:53:42,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:42,090 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2020-12-23 16:53:42,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:53:42,090 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 61 [2020-12-23 16:53:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:42,092 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:53:42,092 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 16:53:42,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=514, Invalid=4598, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:53:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 16:53:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2020-12-23 16:53:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 16:53:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-12-23 16:53:42,097 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 61 [2020-12-23 16:53:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:42,097 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-12-23 16:53:42,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:53:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-12-23 16:53:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 16:53:42,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:42,098 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:42,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 16:53:42,302 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:42,303 INFO L82 PathProgramCache]: Analyzing trace with hash -894897563, now seen corresponding path program 7 times [2020-12-23 16:53:42,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:42,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637228293] [2020-12-23 16:53:42,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637228293] [2020-12-23 16:53:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614131025] [2020-12-23 16:53:42,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 16:53:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:42,778 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_34|]} [2020-12-23 16:53:42,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:42,786 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:42,787 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:42,798 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:42,803 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:42,805 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:42,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:42,822 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:42,822 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:44,003 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:44,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2020-12-23 16:53:44,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892195769] [2020-12-23 16:53:44,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:53:44,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:53:44,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:44,006 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 35 states. [2020-12-23 16:53:46,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:46,188 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-12-23 16:53:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:53:46,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 66 [2020-12-23 16:53:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:46,190 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:53:46,191 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:53:46,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=423, Invalid=2127, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 16:53:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:53:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-12-23 16:53:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 16:53:46,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-12-23 16:53:46,195 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 66 [2020-12-23 16:53:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:46,195 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-12-23 16:53:46,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:53:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-12-23 16:53:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 16:53:46,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:46,196 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:46,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:53:46,397 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:46,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1031298967, now seen corresponding path program 12 times [2020-12-23 16:53:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:46,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942217289] [2020-12-23 16:53:46,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 15 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942217289] [2020-12-23 16:53:46,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103696648] [2020-12-23 16:53:46,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:47,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 16:53:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-23 16:53:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:47,512 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:47,514 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,523 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,523 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 16:53:48,057 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:48,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,073 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,073 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-23 16:53:48,234 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:48,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:48,355 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:48,356 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,373 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,375 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,375 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:53:48,479 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:48,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,495 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,496 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,498 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:53:48,592 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:48,593 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,608 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,609 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,610 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:53:48,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:48,704 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,723 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:53:48,826 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:48,828 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,846 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,847 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:53:48,947 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:53:48,948 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,962 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,964 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:48,964 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:37, output treesize:22 [2020-12-23 16:53:49,117 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:49,120 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:49,120 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-23 16:53:49,121 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:49,128 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:49,129 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:49,129 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2020-12-23 16:53:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 15 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:49,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:49,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 42 [2020-12-23 16:53:49,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855269320] [2020-12-23 16:53:49,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 16:53:49,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 16:53:49,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1616, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:53:49,171 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 42 states. [2020-12-23 16:53:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:50,948 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-12-23 16:53:50,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:53:50,949 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 69 [2020-12-23 16:53:50,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:50,950 INFO L225 Difference]: With dead ends: 112 [2020-12-23 16:53:50,950 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 16:53:50,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=232, Invalid=2524, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:53:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 16:53:50,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2020-12-23 16:53:50,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:53:50,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2020-12-23 16:53:50,954 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 69 [2020-12-23 16:53:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:50,954 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2020-12-23 16:53:50,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 16:53:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2020-12-23 16:53:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:53:50,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:50,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:53:51,168 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1329658260, now seen corresponding path program 13 times [2020-12-23 16:53:51,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131725349] [2020-12-23 16:53:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,588 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 66 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131725349] [2020-12-23 16:53:51,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423222267] [2020-12-23 16:53:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:53:51,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 91 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:52,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:52,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 32 [2020-12-23 16:53:52,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637055618] [2020-12-23 16:53:52,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:53:52,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:52,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:53:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:53:52,203 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand 33 states. [2020-12-23 16:53:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:53,247 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2020-12-23 16:53:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:53:53,247 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 73 [2020-12-23 16:53:53,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:53,249 INFO L225 Difference]: With dead ends: 83 [2020-12-23 16:53:53,249 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 16:53:53,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=385, Invalid=1421, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:53:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 16:53:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2020-12-23 16:53:53,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 16:53:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-12-23 16:53:53,252 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 73 [2020-12-23 16:53:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:53,252 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-12-23 16:53:53,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:53:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-12-23 16:53:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:53:53,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:53,253 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:53,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 16:53:53,457 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:53,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:53,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1730266887, now seen corresponding path program 8 times [2020-12-23 16:53:53,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:53,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452401763] [2020-12-23 16:53:53,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:53,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452401763] [2020-12-23 16:53:53,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693760116] [2020-12-23 16:53:53,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:53,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:53,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:53:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:53,994 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_23|], 1=[|v_#valid_36|]} [2020-12-23 16:53:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:54,001 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:54,002 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:54,016 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,021 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:54,023 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:54,034 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,036 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:54,036 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:53:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 91 proven. 157 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:55,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:55,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 38 [2020-12-23 16:53:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418470587] [2020-12-23 16:53:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:53:55,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:55,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:53:55,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:55,459 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 39 states. [2020-12-23 16:53:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:57,768 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-12-23 16:53:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:53:57,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 74 [2020-12-23 16:53:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:57,770 INFO L225 Difference]: With dead ends: 82 [2020-12-23 16:53:57,770 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 16:53:57,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=524, Invalid=2668, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:53:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 16:53:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-12-23 16:53:57,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-23 16:53:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-12-23 16:53:57,773 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 74 [2020-12-23 16:53:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:57,774 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-12-23 16:53:57,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:53:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-12-23 16:53:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:53:57,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:57,774 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:57,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:57,981 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:53:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1816661881, now seen corresponding path program 14 times [2020-12-23 16:53:57,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:57,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864306143] [2020-12-23 16:53:57,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:58,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864306143] [2020-12-23 16:53:58,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792939273] [2020-12-23 16:53:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:58,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:58,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:58,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 16:53:58,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:58,858 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:58,860 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:58,866 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:58,866 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:58,867 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:59,363 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:59,364 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,374 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,375 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:59,376 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2020-12-23 16:53:59,627 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:59,628 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,648 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,651 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:59,651 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:42, output treesize:31 [2020-12-23 16:53:59,764 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:59,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,785 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,788 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:59,788 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:53:59,909 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:59,911 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,930 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,933 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:59,934 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:54:00,069 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:00,070 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,086 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,090 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:00,090 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:54:00,222 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:00,223 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,247 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:00,247 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:54:00,370 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:00,372 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,391 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:00,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:54:00,531 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:00,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:00,554 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:54:00,690 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:00,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:00,713 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:29 [2020-12-23 16:54:00,953 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,953 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:54:00,955 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:00,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,976 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:00,977 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:54:00,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:54:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 91 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:01,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:01,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 48 [2020-12-23 16:54:01,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257957766] [2020-12-23 16:54:01,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 16:54:01,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:01,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 16:54:01,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2092, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:54:01,288 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 48 states. [2020-12-23 16:54:13,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:13,274 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2020-12-23 16:54:13,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 16:54:13,275 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 77 [2020-12-23 16:54:13,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:13,276 INFO L225 Difference]: With dead ends: 131 [2020-12-23 16:54:13,276 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 16:54:13,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=684, Invalid=5635, Unknown=1, NotChecked=0, Total=6320 [2020-12-23 16:54:13,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 16:54:13,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2020-12-23 16:54:13,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:54:13,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-12-23 16:54:13,281 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 77 [2020-12-23 16:54:13,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:13,281 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-12-23 16:54:13,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 16:54:13,281 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-12-23 16:54:13,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:54:13,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:13,282 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:54:13,496 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:13,497 INFO L82 PathProgramCache]: Analyzing trace with hash 584961449, now seen corresponding path program 9 times [2020-12-23 16:54:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:13,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636985882] [2020-12-23 16:54:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:14,067 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 91 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:14,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636985882] [2020-12-23 16:54:14,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339814984] [2020-12-23 16:54:14,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:15,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 16:54:15,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:15,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 16:54:15,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:15,055 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_38|]} [2020-12-23 16:54:15,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:15,062 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:15,063 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:15,076 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:15,081 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:15,082 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:15,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:15,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:15,099 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:54:16,952 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:16,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:16,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2020-12-23 16:54:16,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475864898] [2020-12-23 16:54:16,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 16:54:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:16,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 16:54:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:54:16,955 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 43 states. [2020-12-23 16:54:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:20,241 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2020-12-23 16:54:20,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:54:20,242 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 82 [2020-12-23 16:54:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:20,243 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:54:20,243 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:54:20,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=714, Invalid=3192, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 16:54:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:54:20,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-12-23 16:54:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 16:54:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-12-23 16:54:20,247 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 82 [2020-12-23 16:54:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:20,247 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-12-23 16:54:20,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 16:54:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-12-23 16:54:20,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 16:54:20,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:20,248 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:20,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:20,449 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:20,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1904201381, now seen corresponding path program 15 times [2020-12-23 16:54:20,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:20,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946654387] [2020-12-23 16:54:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:21,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946654387] [2020-12-23 16:54:21,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305170443] [2020-12-23 16:54:21,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:23,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-12-23 16:54:23,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:54:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:23,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:23,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:23,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:54:23,855 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:23,856 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,866 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:23,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:23,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:54:24,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:24,062 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,074 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,076 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:24,076 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:54:24,136 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,138 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,146 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,148 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,148 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,159 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,160 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,184 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,186 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,219 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,219 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,230 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,239 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,240 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,254 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,263 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,265 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,278 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,301 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:24,302 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,310 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:54:24,320 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:54:24,321 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,323 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,324 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,324 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:54:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:24,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:24,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 40 [2020-12-23 16:54:24,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715725816] [2020-12-23 16:54:24,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:54:24,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:24,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:54:24,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:54:24,363 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 40 states. [2020-12-23 16:54:26,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:26,893 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-12-23 16:54:26,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 16:54:26,894 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 85 [2020-12-23 16:54:26,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:26,895 INFO L225 Difference]: With dead ends: 136 [2020-12-23 16:54:26,896 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:54:26,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:54:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:54:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-12-23 16:54:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:54:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2020-12-23 16:54:26,900 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2020-12-23 16:54:26,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:26,900 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2020-12-23 16:54:26,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:54:26,900 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2020-12-23 16:54:26,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-12-23 16:54:26,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:26,901 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:27,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 16:54:27,105 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 16 times [2020-12-23 16:54:27,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:27,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626676162] [2020-12-23 16:54:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626676162] [2020-12-23 16:54:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220315593] [2020-12-23 16:54:27,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:27,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:27,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:27,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-23 16:54:27,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:27,917 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_40|]} [2020-12-23 16:54:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:27,922 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:27,923 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:27,936 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:27,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:27,944 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:27,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:27,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:27,957 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:54:28,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:28,696 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:28,706 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:28,707 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:28,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 16:54:28,935 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:28,936 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:28,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:28,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:28,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,047 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,064 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,065 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,164 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,182 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,184 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,289 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,306 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,308 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,405 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,407 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,532 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,552 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,652 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,669 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,669 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,784 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,786 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:29,928 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:29,929 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:29,945 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:29,946 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:23 [2020-12-23 16:54:30,159 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:30,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:54:30,163 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:30,178 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:30,179 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:30,179 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:54:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 162 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:30,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:30,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 28] total 51 [2020-12-23 16:54:30,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601337663] [2020-12-23 16:54:30,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 16:54:30,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:30,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 16:54:30,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=2419, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:54:30,520 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand 52 states. [2020-12-23 16:54:34,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:34,476 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2020-12-23 16:54:34,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:54:34,477 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 89 [2020-12-23 16:54:34,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:34,477 INFO L225 Difference]: With dead ends: 99 [2020-12-23 16:54:34,477 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:54:34,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=721, Invalid=4109, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 16:54:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:54:34,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2020-12-23 16:54:34,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:54:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-12-23 16:54:34,480 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 89 [2020-12-23 16:54:34,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:34,481 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-12-23 16:54:34,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 16:54:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-12-23 16:54:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 16:54:34,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:34,482 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:34,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:34,685 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:34,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1829697973, now seen corresponding path program 10 times [2020-12-23 16:54:34,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:34,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769056510] [2020-12-23 16:54:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769056510] [2020-12-23 16:54:35,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726303890] [2020-12-23 16:54:35,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:35,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:35,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-23 16:54:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:35,511 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_41|]} [2020-12-23 16:54:35,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:35,519 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:35,520 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,532 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,537 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:35,539 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,554 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,554 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:15 [2020-12-23 16:54:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-12-23 16:54:36,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:36,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 38 [2020-12-23 16:54:36,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339744126] [2020-12-23 16:54:36,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:54:36,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:36,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:54:36,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:54:36,814 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 39 states. [2020-12-23 16:54:40,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:40,927 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2020-12-23 16:54:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:54:40,930 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 90 [2020-12-23 16:54:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:40,931 INFO L225 Difference]: With dead ends: 98 [2020-12-23 16:54:40,931 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 16:54:40,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 16:54:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 16:54:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-12-23 16:54:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:54:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-12-23 16:54:40,935 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 90 [2020-12-23 16:54:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:40,935 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-12-23 16:54:40,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:54:40,936 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-12-23 16:54:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 16:54:40,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:40,936 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:41,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 16:54:41,145 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1102366013, now seen corresponding path program 17 times [2020-12-23 16:54:41,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:41,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998160663] [2020-12-23 16:54:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:42,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998160663] [2020-12-23 16:54:42,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167827406] [2020-12-23 16:54:42,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:43,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 16:54:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-23 16:54:43,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:43,213 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_27|], 1=[|v_#valid_42|]} [2020-12-23 16:54:43,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:43,218 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:43,219 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,232 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:43,238 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:43,240 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:43,255 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,256 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:54:44,191 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:44,192 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,201 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,202 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,203 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:54:44,400 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:54:44,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,415 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,417 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:25 [2020-12-23 16:54:44,547 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:54:44,548 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:25 [2020-12-23 16:54:44,694 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:44,696 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,713 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:44,837 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:44,839 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,854 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,856 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:44,981 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:44,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,999 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,999 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:45,132 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:45,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,150 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:45,152 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:45,290 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:45,292 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:45,307 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:45,427 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:45,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:45,445 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:45,573 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:45,576 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,590 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:45,592 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:54:45,741 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:45,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,760 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:45,762 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:45,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2020-12-23 16:54:46,022 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:46,022 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:54:46,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:46,038 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:46,039 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:46,040 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:21 [2020-12-23 16:54:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 153 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:46,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:46,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 55 [2020-12-23 16:54:46,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343436468] [2020-12-23 16:54:46,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 16:54:46,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:46,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 16:54:46,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:54:46,477 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 55 states. [2020-12-23 16:54:54,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:54,078 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2020-12-23 16:54:54,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 16:54:54,079 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 93 [2020-12-23 16:54:54,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:54,080 INFO L225 Difference]: With dead ends: 155 [2020-12-23 16:54:54,080 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 16:54:54,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=874, Invalid=9026, Unknown=0, NotChecked=0, Total=9900 [2020-12-23 16:54:54,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 16:54:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-12-23 16:54:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 16:54:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-12-23 16:54:54,084 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 93 [2020-12-23 16:54:54,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:54,084 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-12-23 16:54:54,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 16:54:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-12-23 16:54:54,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 16:54:54,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:54,085 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:54,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:54,296 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:54:54,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:54,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1433366765, now seen corresponding path program 11 times [2020-12-23 16:54:54,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:54,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558703955] [2020-12-23 16:54:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:55,086 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558703955] [2020-12-23 16:54:55,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042367923] [2020-12-23 16:54:55,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:57,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 16:54:57,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:57,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 16:54:57,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:57,079 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_43|]} [2020-12-23 16:54:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:57,086 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:57,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:57,102 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:57,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:57,109 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:57,123 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:57,124 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:57,125 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:21 [2020-12-23 16:54:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 190 proven. 283 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:59,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:59,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 49 [2020-12-23 16:54:59,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555889174] [2020-12-23 16:54:59,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:54:59,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:59,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:54:59,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=2185, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:54:59,433 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 50 states. [2020-12-23 16:55:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:02,533 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2020-12-23 16:55:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:55:02,534 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-23 16:55:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:02,534 INFO L225 Difference]: With dead ends: 106 [2020-12-23 16:55:02,534 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 16:55:02,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=630, Invalid=3402, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:55:02,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 16:55:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-12-23 16:55:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 16:55:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2020-12-23 16:55:02,539 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 98 [2020-12-23 16:55:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:02,539 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2020-12-23 16:55:02,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:55:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2020-12-23 16:55:02,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-23 16:55:02,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:02,540 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:02,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 16:55:02,754 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:55:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:02,755 INFO L82 PathProgramCache]: Analyzing trace with hash 864433377, now seen corresponding path program 18 times [2020-12-23 16:55:02,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:02,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705448978] [2020-12-23 16:55:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 23 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705448978] [2020-12-23 16:55:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103444147] [2020-12-23 16:55:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:08,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 16:55:08,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:08,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 159 conjunts are in the unsatisfiable core [2020-12-23 16:55:08,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:08,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:08,217 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:08,225 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:08,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:08,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 16:55:09,388 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:09,389 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:09,406 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:09,408 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:09,408 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-23 16:55:09,664 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:09,665 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:09,686 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:09,688 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:09,688 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:55:09,827 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:09,828 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:09,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:09,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:09,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:09,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:09,999 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,021 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:10,164 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:10,165 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,186 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,188 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,188 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:10,333 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:10,334 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,357 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,358 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:10,505 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:10,508 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,529 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:10,682 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:10,684 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,706 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:10,852 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:10,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:10,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:10,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:10,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:11,023 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:11,024 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,045 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:11,045 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:11,193 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:11,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,214 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,216 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:11,216 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:11,361 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:11,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,385 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:11,386 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:55:11,528 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:55:11,531 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,531 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2020-12-23 16:55:11,533 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,541 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,543 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,544 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:3 [2020-12-23 16:55:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 23 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:11,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:11,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 57 [2020-12-23 16:55:11,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093369319] [2020-12-23 16:55:11,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 16:55:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:11,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 16:55:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3049, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:55:11,607 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand 57 states. [2020-12-23 16:55:15,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:15,569 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2020-12-23 16:55:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:55:15,570 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 101 [2020-12-23 16:55:15,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:15,571 INFO L225 Difference]: With dead ends: 160 [2020-12-23 16:55:15,571 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 16:55:15,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=316, Invalid=4796, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:55:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 16:55:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-12-23 16:55:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 16:55:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-12-23 16:55:15,575 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 101 [2020-12-23 16:55:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:15,575 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-12-23 16:55:15,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 16:55:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-12-23 16:55:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-23 16:55:15,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:15,576 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:15,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:15,789 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:55:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash -198390044, now seen corresponding path program 19 times [2020-12-23 16:55:15,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:15,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259431320] [2020-12-23 16:55:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:15,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:16,860 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 190 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:16,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259431320] [2020-12-23 16:55:16,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440077402] [2020-12-23 16:55:16,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:16,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 16:55:16,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 231 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:17,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:17,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29] total 44 [2020-12-23 16:55:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994007876] [2020-12-23 16:55:17,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 16:55:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 16:55:17,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1687, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:55:17,956 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 45 states. [2020-12-23 16:55:20,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:20,263 INFO L93 Difference]: Finished difference Result 115 states and 116 transitions. [2020-12-23 16:55:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:55:20,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 105 [2020-12-23 16:55:20,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:20,265 INFO L225 Difference]: With dead ends: 115 [2020-12-23 16:55:20,265 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 16:55:20,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=727, Invalid=2695, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 16:55:20,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 16:55:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-12-23 16:55:20,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 16:55:20,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-12-23 16:55:20,268 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 105 [2020-12-23 16:55:20,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:20,268 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-12-23 16:55:20,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 16:55:20,268 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-12-23 16:55:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 16:55:20,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:20,269 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:20,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 16:55:20,481 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:55:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:20,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1855124081, now seen corresponding path program 12 times [2020-12-23 16:55:20,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:20,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563392589] [2020-12-23 16:55:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 190 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:21,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563392589] [2020-12-23 16:55:21,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945673387] [2020-12-23 16:55:21,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:24,617 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 16:55:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:24,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-23 16:55:24,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:24,639 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_29|], 1=[|v_#valid_45|]} [2020-12-23 16:55:24,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:24,647 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:55:24,652 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:24,667 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:24,675 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:24,677 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:24,693 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:24,694 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:24,695 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:18 [2020-12-23 16:55:26,370 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-12-23 16:55:26,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:26,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 17] total 43 [2020-12-23 16:55:26,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693260152] [2020-12-23 16:55:26,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 16:55:26,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:26,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 16:55:26,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1751, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:55:26,372 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 44 states. [2020-12-23 16:55:32,407 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-12-23 16:55:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:32,557 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-12-23 16:55:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:55:32,558 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 106 [2020-12-23 16:55:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:32,558 INFO L225 Difference]: With dead ends: 114 [2020-12-23 16:55:32,559 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 16:55:32,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=734, Invalid=4236, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 16:55:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 16:55:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-12-23 16:55:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 16:55:32,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2020-12-23 16:55:32,562 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 106 [2020-12-23 16:55:32,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:32,562 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2020-12-23 16:55:32,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 16:55:32,563 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2020-12-23 16:55:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-23 16:55:32,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:32,563 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:32,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:55:32,765 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:55:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1637661951, now seen corresponding path program 20 times [2020-12-23 16:55:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:32,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210028737] [2020-12-23 16:55:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:32,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 25 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210028737] [2020-12-23 16:55:34,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075269846] [2020-12-23 16:55:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:34,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:34,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:34,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 122 conjunts are in the unsatisfiable core [2020-12-23 16:55:34,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:34,586 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:34,588 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:34,595 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:34,596 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:34,597 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:55:35,831 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:35,833 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:35,849 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:35,851 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:35,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2020-12-23 16:55:36,315 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:36,317 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,349 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,350 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:42, output treesize:31 [2020-12-23 16:55:36,520 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:36,522 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,548 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,549 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:36,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:36,712 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,744 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,744 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:36,925 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:36,927 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,953 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,954 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:37,129 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:37,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:37,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:37,157 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:37,157 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:37,340 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:37,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:37,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:37,368 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:37,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:37,555 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:37,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:37,578 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:37,582 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:37,583 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:37,782 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:37,783 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:37,806 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:37,809 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:37,810 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:38,008 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:38,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,035 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:38,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:38,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:38,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,264 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:38,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:38,464 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:38,466 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,488 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,492 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:38,492 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:33 [2020-12-23 16:55:38,699 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:38,700 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:38,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:38,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:38,728 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:44, output treesize:29 [2020-12-23 16:55:39,119 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:39,120 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2020-12-23 16:55:39,122 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:39,144 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:39,147 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:55:39,149 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:55:39,150 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:39,151 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:27 [2020-12-23 16:55:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 231 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:39,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:39,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33] total 64 [2020-12-23 16:55:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375522269] [2020-12-23 16:55:39,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 16:55:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:39,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 16:55:39,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3756, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:55:39,671 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand 64 states. [2020-12-23 16:55:54,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:54,742 INFO L93 Difference]: Finished difference Result 179 states and 180 transitions. [2020-12-23 16:55:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 16:55:54,743 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 109 [2020-12-23 16:55:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:54,744 INFO L225 Difference]: With dead ends: 179 [2020-12-23 16:55:54,744 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 16:55:54,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1084, Invalid=9628, Unknown=0, NotChecked=0, Total=10712 [2020-12-23 16:55:54,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 16:55:54,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2020-12-23 16:55:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 16:55:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-12-23 16:55:54,748 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 109 [2020-12-23 16:55:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:54,749 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-12-23 16:55:54,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 16:55:54,749 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-12-23 16:55:54,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 16:55:54,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:54,749 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:54,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 16:55:54,958 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:55:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:54,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1996348465, now seen corresponding path program 13 times [2020-12-23 16:55:54,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:54,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853427695] [2020-12-23 16:55:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:56,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853427695] [2020-12-23 16:55:56,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310395698] [2020-12-23 16:55:56,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:56,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 16:55:56,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:56,278 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_47|]} [2020-12-23 16:55:56,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:56,286 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:55:56,287 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,301 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,308 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:56,310 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,327 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,328 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:56,329 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:56:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 276 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:00,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:00,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2020-12-23 16:56:00,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880155722] [2020-12-23 16:56:00,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 16:56:00,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:00,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 16:56:00,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3148, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 16:56:00,362 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 59 states. [2020-12-23 16:56:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:06,142 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2020-12-23 16:56:06,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:56:06,143 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 114 [2020-12-23 16:56:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:06,144 INFO L225 Difference]: With dead ends: 122 [2020-12-23 16:56:06,144 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 16:56:06,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1194, Invalid=6288, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 16:56:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 16:56:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2020-12-23 16:56:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 16:56:06,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-12-23 16:56:06,148 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 114 [2020-12-23 16:56:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:06,148 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-12-23 16:56:06,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 16:56:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-12-23 16:56:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-23 16:56:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:06,149 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:06,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:56:06,350 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:56:06,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash 804967197, now seen corresponding path program 21 times [2020-12-23 16:56:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:06,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057329198] [2020-12-23 16:56:06,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:08,384 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 27 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057329198] [2020-12-23 16:56:08,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848277013] [2020-12-23 16:56:08,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:18,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-12-23 16:56:18,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:18,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-23 16:56:18,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:18,439 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:18,442 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:18,447 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:18,448 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:18,448 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:56:20,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:56:20,141 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,157 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:20,158 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:56:20,478 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:56:20,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,499 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:20,499 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:56:20,593 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,595 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,606 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,622 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,623 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,635 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,637 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,637 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,652 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,664 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,664 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,679 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,691 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,693 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,693 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,707 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,708 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,721 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,721 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,737 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,738 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,764 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,766 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,775 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,777 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,778 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,792 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,804 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,806 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,807 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,823 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,825 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,837 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,851 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,853 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,863 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,865 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,865 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,878 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,880 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,893 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,893 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:56:20,912 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:20,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,925 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:20,927 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:20,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:25, output treesize:9 [2020-12-23 16:56:21,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:56:21,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:21,048 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:21,049 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:56:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 27 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:21,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:21,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 53 [2020-12-23 16:56:21,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008503581] [2020-12-23 16:56:21,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 16:56:21,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:21,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 16:56:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2631, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:56:21,090 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 53 states. [2020-12-23 16:56:27,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:27,381 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2020-12-23 16:56:27,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:56:27,383 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 117 [2020-12-23 16:56:27,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:27,384 INFO L225 Difference]: With dead ends: 184 [2020-12-23 16:56:27,384 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 16:56:27,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=285, Invalid=4827, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 16:56:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 16:56:27,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2020-12-23 16:56:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 16:56:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2020-12-23 16:56:27,388 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 117 [2020-12-23 16:56:27,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:27,388 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2020-12-23 16:56:27,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 16:56:27,389 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2020-12-23 16:56:27,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-23 16:56:27,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:27,389 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:27,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 16:56:27,594 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:56:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:27,595 INFO L82 PathProgramCache]: Analyzing trace with hash 103483168, now seen corresponding path program 22 times [2020-12-23 16:56:27,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:27,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37428607] [2020-12-23 16:56:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:29,113 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 276 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:29,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37428607] [2020-12-23 16:56:29,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386100094] [2020-12-23 16:56:29,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:29,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:56:29,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:29,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-23 16:56:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:29,305 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_49|]} [2020-12-23 16:56:29,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:29,313 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:29,315 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:29,335 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:29,344 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:29,348 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:29,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:29,370 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:29,370 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:56:31,270 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:56:31,272 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:31,292 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,292 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 16:56:31,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:31,722 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,746 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:31,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,749 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:31,916 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:31,918 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,940 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:31,942 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:31,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:32,094 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:32,096 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,118 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:32,120 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,120 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:32,270 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:32,272 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,294 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:32,296 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:32,484 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:32,486 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:32,514 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:32,709 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:32,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:32,739 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,739 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:32,933 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:32,935 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,952 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:32,954 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:32,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:33,130 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:33,133 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,162 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:33,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:33,367 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,398 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,399 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:33,602 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:33,605 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,632 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,633 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:33,820 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:33,822 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,847 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,848 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:34,027 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:34,029 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:34,051 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:34,054 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:34,054 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:27 [2020-12-23 16:56:34,243 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:34,245 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:34,266 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:34,268 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:34,268 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:23 [2020-12-23 16:56:34,638 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:34,639 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:56:34,643 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:56:34,660 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:34,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:34,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:24 [2020-12-23 16:56:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 338 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:35,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:35,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 36] total 67 [2020-12-23 16:56:35,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103806590] [2020-12-23 16:56:35,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 16:56:35,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:35,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 16:56:35,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=4157, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 16:56:35,331 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand 68 states. [2020-12-23 16:56:43,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:43,744 INFO L93 Difference]: Finished difference Result 131 states and 132 transitions. [2020-12-23 16:56:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:56:43,745 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 121 [2020-12-23 16:56:43,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:43,746 INFO L225 Difference]: With dead ends: 131 [2020-12-23 16:56:43,746 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 16:56:43,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1171, Invalid=6839, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 16:56:43,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 16:56:43,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2020-12-23 16:56:43,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 16:56:43,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-12-23 16:56:43,750 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 121 [2020-12-23 16:56:43,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:43,750 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-12-23 16:56:43,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 16:56:43,751 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-12-23 16:56:43,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 16:56:43,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:43,751 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:43,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:43,953 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:56:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1086989101, now seen corresponding path program 14 times [2020-12-23 16:56:43,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:43,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013493868] [2020-12-23 16:56:43,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:45,375 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 276 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:45,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013493868] [2020-12-23 16:56:45,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514646638] [2020-12-23 16:56:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:45,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:56:45,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:45,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:56:45,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:45,554 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_50|]} [2020-12-23 16:56:45,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:45,565 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:45,569 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:45,588 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:45,598 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:45,600 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:45,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:45,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:45,621 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:21 [2020-12-23 16:56:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 325 proven. 445 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:50,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:50,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32] total 62 [2020-12-23 16:56:50,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411312047] [2020-12-23 16:56:50,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 16:56:50,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:50,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 16:56:50,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=3598, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 16:56:50,882 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 63 states. [2020-12-23 16:56:55,580 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35