/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_cstrncat-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:53:04,649 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:53:04,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:53:04,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:53:04,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:53:04,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:53:04,724 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:53:04,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:53:04,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:53:04,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:53:04,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:53:04,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:53:04,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:53:04,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:53:04,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:53:04,739 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:53:04,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:53:04,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:53:04,744 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:53:04,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:53:04,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:53:04,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:53:04,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:53:04,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:53:04,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:53:04,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:53:04,765 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:53:04,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:53:04,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:53:04,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:53:04,769 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:53:04,770 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:53:04,771 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:53:04,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:53:04,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:53:04,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:53:04,775 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 16:53:04,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:53:04,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:53:04,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:53:04,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:53:04,807 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:53:04,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:53:04,808 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:53:04,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:53:04,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:53:04,809 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:53:04,809 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:53:04,809 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:53:04,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:53:04,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:53:04,827 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:53:04,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:53:04,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:53:04,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:53:04,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:04,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:53:04,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:53:04,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:53:04,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:53:04,830 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:53:04,830 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:53:05,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:53:05,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:53:05,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:53:05,365 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:53:05,366 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:53:05,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2020-12-23 16:53:05,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec9f4a436/254e85bcbff44094a887206873083707/FLAG60d6696c8 [2020-12-23 16:53:06,245 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:53:06,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2020-12-23 16:53:06,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec9f4a436/254e85bcbff44094a887206873083707/FLAG60d6696c8 [2020-12-23 16:53:06,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ec9f4a436/254e85bcbff44094a887206873083707 [2020-12-23 16:53:06,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:53:06,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:53:06,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:06,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:53:06,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:53:06,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:06" (1/1) ... [2020-12-23 16:53:06,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5deea787 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:06, skipping insertion in model container [2020-12-23 16:53:06,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:06" (1/1) ... [2020-12-23 16:53:06,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:53:06,607 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[~d~0,] left hand side expression in assignment: address: IdentifierExpression[~d~0,] 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: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IdentifierExpression[~n~0,]],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:06,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:06,929 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[~d~0,] left hand side expression in assignment: address: IdentifierExpression[~d~0,] 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: lhs: VariableLHS[~n~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,BinaryExpression[ARITHMINUS,IdentifierExpression[~length1~0,],IdentifierExpression[~n~0,]],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:06,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:07,053 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:53:07,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07 WrapperNode [2020-12-23 16:53:07,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:07,056 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:07,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:53:07,057 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:53:07,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:07,153 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:53:07,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:53:07,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:53:07,164 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (1/1) ... [2020-12-23 16:53:07,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:53:07,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:53:07,190 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:53:07,190 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:53:07,191 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (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 16:53:07,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:53:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:53:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:53:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:53:07,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:53:07,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:53:07,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:53:07,867 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:53:07,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:07 BoogieIcfgContainer [2020-12-23 16:53:07,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:53:07,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:53:07,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:53:07,877 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:53:07,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:53:06" (1/3) ... [2020-12-23 16:53:07,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c69fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:07, skipping insertion in model container [2020-12-23 16:53:07,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:07" (2/3) ... [2020-12-23 16:53:07,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c69fe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:07, skipping insertion in model container [2020-12-23 16:53:07,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:07" (3/3) ... [2020-12-23 16:53:07,881 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2020-12-23 16:53:07,890 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:07,896 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-12-23 16:53:07,920 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-12-23 16:53:07,949 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:07,949 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:07,950 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:07,950 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:07,950 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:07,950 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:07,950 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:07,951 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:07,970 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-12-23 16:53:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:07,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:07,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:07,980 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:07,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:07,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1805031113, now seen corresponding path program 1 times [2020-12-23 16:53:07,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:07,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526971599] [2020-12-23 16:53:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,190 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 16:53:08,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526971599] [2020-12-23 16:53:08,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:08,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189538640] [2020-12-23 16:53:08,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:08,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:08,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:08,253 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-12-23 16:53:08,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,379 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-12-23 16:53:08,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:08,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:08,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,392 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:53:08,393 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:53:08,394 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 16:53:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:53:08,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 16:53:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:08,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-12-23 16:53:08,437 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 7 [2020-12-23 16:53:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,438 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-12-23 16:53:08,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-12-23 16:53:08,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:53:08,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:08,440 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,441 INFO L82 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2020-12-23 16:53:08,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101578475] [2020-12-23 16:53:08,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,532 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 16:53:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101578475] [2020-12-23 16:53:08,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:08,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982453920] [2020-12-23 16:53:08,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:08,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:08,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:08,540 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-12-23 16:53:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,633 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2020-12-23 16:53:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:08,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 16:53:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,634 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:53:08,635 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:53:08,636 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 16:53:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:53:08,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 16:53:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-12-23 16:53:08,642 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2020-12-23 16:53:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,643 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-12-23 16:53:08,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-12-23 16:53:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:53:08,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:08,645 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,645 INFO L82 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2020-12-23 16:53:08,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887669695] [2020-12-23 16:53:08,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,708 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 16:53:08,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887669695] [2020-12-23 16:53:08,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:08,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088851802] [2020-12-23 16:53:08,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:08,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:08,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:08,712 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 3 states. [2020-12-23 16:53:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,751 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-12-23 16:53:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:08,751 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 16:53:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,752 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:53:08,753 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:53:08,753 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 16:53:08,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:53:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 16:53:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:53:08,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-23 16:53:08,759 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 8 [2020-12-23 16:53:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,760 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-23 16:53:08,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:08,760 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-23 16:53:08,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:53:08,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:53:08,761 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,762 INFO L82 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2020-12-23 16:53:08,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735066385] [2020-12-23 16:53:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,890 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 16:53:08,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735066385] [2020-12-23 16:53:08,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:08,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801438775] [2020-12-23 16:53:08,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:08,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:08,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:08,897 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 6 states. [2020-12-23 16:53:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,050 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-12-23 16:53:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:09,051 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-12-23 16:53:09,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,052 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:53:09,052 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:53:09,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:09,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:53:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-12-23 16:53:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:53:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-12-23 16:53:09,059 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2020-12-23 16:53:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,059 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-12-23 16:53:09,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-12-23 16:53:09,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:53:09,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,060 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:53:09,061 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2020-12-23 16:53:09,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977027522] [2020-12-23 16:53:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,191 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 16:53:09,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977027522] [2020-12-23 16:53:09,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413930934] [2020-12-23 16:53:09,192 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 16:53:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:53:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:09,388 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_20|], 1=[|v_#valid_28|]} [2020-12-23 16:53:09,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:09,411 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 16:53:09,413 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:09,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:09,440 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 16:53:09,451 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:09,493 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:09,499 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 16:53:09,500 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:09,567 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 16:53:09,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:09,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:09,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563914969] [2020-12-23 16:53:09,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:09,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:09,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:09,571 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 6 states. [2020-12-23 16:53:09,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,684 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-12-23 16:53:09,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:09,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 16:53:09,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,686 INFO L225 Difference]: With dead ends: 49 [2020-12-23 16:53:09,686 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 16:53:09,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 16:53:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 16:53:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-12-23 16:53:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:53:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-12-23 16:53:09,692 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 12 [2020-12-23 16:53:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,693 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-12-23 16:53:09,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-12-23 16:53:09,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:09,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:09,896 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,898 INFO L82 PathProgramCache]: Analyzing trace with hash 840060780, now seen corresponding path program 1 times [2020-12-23 16:53:09,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162428270] [2020-12-23 16:53:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:10,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162428270] [2020-12-23 16:53:10,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641763185] [2020-12-23 16:53:10,027 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 16:53:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:53:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:10,270 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 16:53:10,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:10,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2020-12-23 16:53:10,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034276297] [2020-12-23 16:53:10,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:10,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:10,281 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 8 states. [2020-12-23 16:53:10,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,419 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-23 16:53:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:10,421 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 16:53:10,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,426 INFO L225 Difference]: With dead ends: 45 [2020-12-23 16:53:10,426 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:53:10,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:53:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:53:10,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 16:53:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:53:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2020-12-23 16:53:10,446 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 14 [2020-12-23 16:53:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,447 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2020-12-23 16:53:10,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2020-12-23 16:53:10,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:10,450 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:10,665 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,666 INFO L82 PathProgramCache]: Analyzing trace with hash 840060832, now seen corresponding path program 1 times [2020-12-23 16:53:10,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526451461] [2020-12-23 16:53:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526451461] [2020-12-23 16:53:10,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:10,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007436192] [2020-12-23 16:53:10,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:10,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:10,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:10,716 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand 4 states. [2020-12-23 16:53:10,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,737 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2020-12-23 16:53:10,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:10,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 16:53:10,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,738 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:53:10,738 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:53:10,739 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 16:53:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:53:10,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 54. [2020-12-23 16:53:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 16:53:10,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-12-23 16:53:10,744 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 14 [2020-12-23 16:53:10,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,744 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-12-23 16:53:10,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:10,744 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-12-23 16:53:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:10,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:53:10,745 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2020-12-23 16:53:10,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912590703] [2020-12-23 16:53:10,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912590703] [2020-12-23 16:53:10,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:10,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747750544] [2020-12-23 16:53:10,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:10,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:10,781 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 3 states. [2020-12-23 16:53:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,812 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-12-23 16:53:10,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:10,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 16:53:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,814 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:53:10,814 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:53:10,814 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 16:53:10,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:53:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:53:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:53:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-12-23 16:53:10,818 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 14 [2020-12-23 16:53:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,819 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-12-23 16:53:10,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-12-23 16:53:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:10,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,820 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:53:10,820 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1541125411, now seen corresponding path program 1 times [2020-12-23 16:53:10,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371236097] [2020-12-23 16:53:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371236097] [2020-12-23 16:53:10,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:10,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453902618] [2020-12-23 16:53:10,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:10,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:10,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:10,897 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 6 states. [2020-12-23 16:53:10,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,996 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-12-23 16:53:10,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:10,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 16:53:10,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,998 INFO L225 Difference]: With dead ends: 80 [2020-12-23 16:53:10,998 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 16:53:10,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:10,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 16:53:11,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2020-12-23 16:53:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:53:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-12-23 16:53:11,003 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 14 [2020-12-23 16:53:11,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:11,003 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-12-23 16:53:11,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:11,003 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-12-23 16:53:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:11,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:11,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:11,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:53:11,005 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:11,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:11,005 INFO L82 PathProgramCache]: Analyzing trace with hash 944154227, now seen corresponding path program 1 times [2020-12-23 16:53:11,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:11,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309097812] [2020-12-23 16:53:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:11,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,103 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 16:53:11,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309097812] [2020-12-23 16:53:11,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:11,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:11,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071209547] [2020-12-23 16:53:11,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:11,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:11,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:11,108 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 5 states. [2020-12-23 16:53:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:11,183 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-23 16:53:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:11,184 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 16:53:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:11,185 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:53:11,185 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:53:11,185 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 16:53:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:53:11,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-12-23 16:53:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:53:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-23 16:53:11,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 18 [2020-12-23 16:53:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:11,190 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-23 16:53:11,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-23 16:53:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:11,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:11,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:11,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:53:11,191 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:11,192 INFO L82 PathProgramCache]: Analyzing trace with hash 944154228, now seen corresponding path program 1 times [2020-12-23 16:53:11,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:11,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203073099] [2020-12-23 16:53:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203073099] [2020-12-23 16:53:11,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719044801] [2020-12-23 16:53:11,299 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 16:53:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:53:11,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:11,467 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_29|]} [2020-12-23 16:53:11,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:11,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:11,476 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 16:53:11,477 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,498 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:11,507 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 5 treesize of output 3 [2020-12-23 16:53:11,512 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:11,535 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:29, output treesize:18 [2020-12-23 16:53:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:11,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:11,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2020-12-23 16:53:11,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893320880] [2020-12-23 16:53:11,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:11,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:11,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:53:11,809 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 7 states. [2020-12-23 16:53:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:11,980 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-12-23 16:53:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:11,981 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 16:53:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:11,982 INFO L225 Difference]: With dead ends: 63 [2020-12-23 16:53:11,982 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:53:11,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:53:11,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-12-23 16:53:11,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:53:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-12-23 16:53:11,999 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 18 [2020-12-23 16:53:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:12,001 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-12-23 16:53:12,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-12-23 16:53:12,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:12,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:12,004 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 16:53:12,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 16:53:12,219 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:12,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:12,220 INFO L82 PathProgramCache]: Analyzing trace with hash -287041178, now seen corresponding path program 1 times [2020-12-23 16:53:12,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:12,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539995231] [2020-12-23 16:53:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:12,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539995231] [2020-12-23 16:53:12,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354964341] [2020-12-23 16:53:12,292 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 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 16:53:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:12,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:53:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:12,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:12,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:12,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 16:53:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657777226] [2020-12-23 16:53:12,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:53:12,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:53:12,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:12,438 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 10 states. [2020-12-23 16:53:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:12,672 INFO L93 Difference]: Finished difference Result 133 states and 163 transitions. [2020-12-23 16:53:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:12,673 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 16:53:12,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:12,674 INFO L225 Difference]: With dead ends: 133 [2020-12-23 16:53:12,674 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 16:53:12,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:12,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 16:53:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 61. [2020-12-23 16:53:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 16:53:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-12-23 16:53:12,680 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 18 [2020-12-23 16:53:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:12,680 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-12-23 16:53:12,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:53:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-12-23 16:53:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:12,681 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:12,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:12,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:12,896 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:12,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:12,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1095465713, now seen corresponding path program 1 times [2020-12-23 16:53:12,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:12,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578408570] [2020-12-23 16:53:12,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:13,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578408570] [2020-12-23 16:53:13,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:13,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:13,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274257073] [2020-12-23 16:53:13,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:13,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:13,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:13,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:13,004 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 4 states. [2020-12-23 16:53:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:13,043 INFO L93 Difference]: Finished difference Result 130 states and 156 transitions. [2020-12-23 16:53:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:13,045 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 16:53:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:13,046 INFO L225 Difference]: With dead ends: 130 [2020-12-23 16:53:13,046 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 16:53:13,046 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 16:53:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 16:53:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-12-23 16:53:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 16:53:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2020-12-23 16:53:13,051 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 20 [2020-12-23 16:53:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:13,052 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2020-12-23 16:53:13,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2020-12-23 16:53:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:13,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:13,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:53:13,054 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1094114349, now seen corresponding path program 1 times [2020-12-23 16:53:13,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:13,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798007660] [2020-12-23 16:53:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:13,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798007660] [2020-12-23 16:53:13,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783902817] [2020-12-23 16:53:13,178 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 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 16:53:13,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:53:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:13,319 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_22|], 1=[|v_#valid_30|]} [2020-12-23 16:53:13,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:13,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:13,329 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 16:53:13,330 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,345 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:13,353 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 5 treesize of output 3 [2020-12-23 16:53:13,354 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,366 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,368 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:13,369 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:29, output treesize:18 [2020-12-23 16:53:13,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:13,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:13,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 16:53:13,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266387892] [2020-12-23 16:53:13,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:13,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:13,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:13,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:13,596 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 15 states. [2020-12-23 16:53:14,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,085 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2020-12-23 16:53:14,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:14,086 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-12-23 16:53:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,087 INFO L225 Difference]: With dead ends: 111 [2020-12-23 16:53:14,087 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 16:53:14,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 16:53:14,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 98. [2020-12-23 16:53:14,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-23 16:53:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 124 transitions. [2020-12-23 16:53:14,093 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 124 transitions. Word has length 20 [2020-12-23 16:53:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,093 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 124 transitions. [2020-12-23 16:53:14,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 124 transitions. [2020-12-23 16:53:14,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:14,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:53:14,305 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,306 INFO L82 PathProgramCache]: Analyzing trace with hash 74397359, now seen corresponding path program 1 times [2020-12-23 16:53:14,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813664732] [2020-12-23 16:53:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:14,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813664732] [2020-12-23 16:53:14,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:14,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:14,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556886642] [2020-12-23 16:53:14,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:14,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:14,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:14,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:14,372 INFO L87 Difference]: Start difference. First operand 98 states and 124 transitions. Second operand 5 states. [2020-12-23 16:53:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,402 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2020-12-23 16:53:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:14,402 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-23 16:53:14,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,403 INFO L225 Difference]: With dead ends: 117 [2020-12-23 16:53:14,403 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 16:53:14,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 16:53:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 16:53:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 69. [2020-12-23 16:53:14,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:53:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2020-12-23 16:53:14,407 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 20 [2020-12-23 16:53:14,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,408 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2020-12-23 16:53:14,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:14,408 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2020-12-23 16:53:14,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:14,409 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:53:14,409 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,410 INFO L82 PathProgramCache]: Analyzing trace with hash -442195040, now seen corresponding path program 1 times [2020-12-23 16:53:14,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924064904] [2020-12-23 16:53:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:14,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924064904] [2020-12-23 16:53:14,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:14,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:14,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336588709] [2020-12-23 16:53:14,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:14,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:14,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:14,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:14,455 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 6 states. [2020-12-23 16:53:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,540 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-12-23 16:53:14,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:14,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-23 16:53:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,541 INFO L225 Difference]: With dead ends: 68 [2020-12-23 16:53:14,541 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 16:53:14,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 16:53:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-23 16:53:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:53:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-12-23 16:53:14,545 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 21 [2020-12-23 16:53:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,545 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-12-23 16:53:14,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-12-23 16:53:14,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:53:14,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:53:14,547 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,547 INFO L82 PathProgramCache]: Analyzing trace with hash -442195039, now seen corresponding path program 1 times [2020-12-23 16:53:14,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251983975] [2020-12-23 16:53:14,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:14,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251983975] [2020-12-23 16:53:14,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:14,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:53:14,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955492976] [2020-12-23 16:53:14,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:14,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:14,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:14,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:14,640 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 8 states. [2020-12-23 16:53:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,768 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2020-12-23 16:53:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:53:14,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-12-23 16:53:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,771 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:53:14,772 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:53:14,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:53:14,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:53:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-12-23 16:53:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-23 16:53:14,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2020-12-23 16:53:14,776 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 21 [2020-12-23 16:53:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,776 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2020-12-23 16:53:14,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:14,777 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2020-12-23 16:53:14,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:53:14,777 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,777 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 16:53:14,778 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,778 INFO L82 PathProgramCache]: Analyzing trace with hash -823097434, now seen corresponding path program 2 times [2020-12-23 16:53:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847262284] [2020-12-23 16:53:14,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:15,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847262284] [2020-12-23 16:53:15,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60540000] [2020-12-23 16:53:15,050 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 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 16:53:15,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:15,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:53:15,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:15,185 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 16:53:15,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,200 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,201 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,201 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 16:53:15,343 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 17 treesize of output 13 [2020-12-23 16:53:15,344 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,373 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:15,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:35 [2020-12-23 16:53:15,477 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 28 treesize of output 27 [2020-12-23 16:53:15,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,522 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:15,523 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:49, output treesize:45 [2020-12-23 16:53:15,813 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:15,814 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 10 [2020-12-23 16:53:15,816 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,834 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,839 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,839 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:58, output treesize:3 [2020-12-23 16:53:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:15,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:15,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2020-12-23 16:53:15,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277163082] [2020-12-23 16:53:15,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:53:15,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:15,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:53:15,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:15,847 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand 19 states. [2020-12-23 16:53:18,561 WARN L197 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-12-23 16:53:20,796 WARN L197 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-12-23 16:53:23,014 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-23 16:53:26,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:26,018 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2020-12-23 16:53:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:26,019 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-23 16:53:26,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:26,020 INFO L225 Difference]: With dead ends: 115 [2020-12-23 16:53:26,020 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 16:53:26,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:53:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 16:53:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2020-12-23 16:53:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 16:53:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2020-12-23 16:53:26,025 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 22 [2020-12-23 16:53:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:26,025 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2020-12-23 16:53:26,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:53:26,026 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2020-12-23 16:53:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:53:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:53:26,238 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:26,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1863163671, now seen corresponding path program 2 times [2020-12-23 16:53:26,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069947030] [2020-12-23 16:53:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:26,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:26,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069947030] [2020-12-23 16:53:26,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930977526] [2020-12-23 16:53:26,377 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 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 16:53:26,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:26,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:26,462 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:26,462 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 16:53:26,464 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:26,482 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:26,484 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 16:53:26,484 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:26,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:26,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2020-12-23 16:53:26,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175550983] [2020-12-23 16:53:26,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:53:26,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:26,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:53:26,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:26,595 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand 13 states. [2020-12-23 16:53:27,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,334 INFO L93 Difference]: Finished difference Result 243 states and 291 transitions. [2020-12-23 16:53:27,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:53:27,335 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 22 [2020-12-23 16:53:27,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,337 INFO L225 Difference]: With dead ends: 243 [2020-12-23 16:53:27,337 INFO L226 Difference]: Without dead ends: 243 [2020-12-23 16:53:27,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=705, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-23 16:53:27,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 90. [2020-12-23 16:53:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-23 16:53:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2020-12-23 16:53:27,343 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 22 [2020-12-23 16:53:27,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,343 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2020-12-23 16:53:27,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:53:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2020-12-23 16:53:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:53:27,346 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:27,561 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1330977111, now seen corresponding path program 3 times [2020-12-23 16:53:27,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273482522] [2020-12-23 16:53:27,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273482522] [2020-12-23 16:53:27,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415206508] [2020-12-23 16:53:27,783 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 16:53:27,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:53:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:27,886 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_32|]} [2020-12-23 16:53:27,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:27,892 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 16:53:27,893 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,904 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,910 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 16:53:27,912 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,924 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 16:53:27,924 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:28,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:28,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2020-12-23 16:53:28,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937493704] [2020-12-23 16:53:28,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:53:28,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:53:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:28,017 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand 13 states. [2020-12-23 16:53:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,435 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-12-23 16:53:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:28,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-12-23 16:53:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,438 INFO L225 Difference]: With dead ends: 141 [2020-12-23 16:53:28,438 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 16:53:28,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 16:53:28,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 100. [2020-12-23 16:53:28,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 16:53:28,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2020-12-23 16:53:28,445 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 26 [2020-12-23 16:53:28,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,445 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2020-12-23 16:53:28,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:53:28,445 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2020-12-23 16:53:28,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:28,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:28,661 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 803583084, now seen corresponding path program 1 times [2020-12-23 16:53:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480591844] [2020-12-23 16:53:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:28,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480591844] [2020-12-23 16:53:28,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:28,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:28,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086570276] [2020-12-23 16:53:28,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:28,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:28,732 INFO L87 Difference]: Start difference. First operand 100 states and 122 transitions. Second operand 4 states. [2020-12-23 16:53:28,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,762 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2020-12-23 16:53:28,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:28,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-12-23 16:53:28,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,763 INFO L225 Difference]: With dead ends: 99 [2020-12-23 16:53:28,763 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:53:28,764 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 16:53:28,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:53:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-23 16:53:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:53:28,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-12-23 16:53:28,767 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 27 [2020-12-23 16:53:28,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,767 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-12-23 16:53:28,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:28,768 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-12-23 16:53:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:28,768 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,768 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 16:53:28,769 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,769 INFO L82 PathProgramCache]: Analyzing trace with hash 805151438, now seen corresponding path program 1 times [2020-12-23 16:53:28,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481072855] [2020-12-23 16:53:28,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:28,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481072855] [2020-12-23 16:53:28,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:28,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:28,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453361676] [2020-12-23 16:53:28,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:28,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:28,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:28,854 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 5 states. [2020-12-23 16:53:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:28,910 INFO L93 Difference]: Finished difference Result 179 states and 204 transitions. [2020-12-23 16:53:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:28,912 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-12-23 16:53:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:28,914 INFO L225 Difference]: With dead ends: 179 [2020-12-23 16:53:28,914 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 16:53:28,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:28,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 16:53:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 153. [2020-12-23 16:53:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 16:53:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-12-23 16:53:28,919 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 27 [2020-12-23 16:53:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:28,919 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-12-23 16:53:28,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-12-23 16:53:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:28,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:28,920 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:28,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 16:53:28,921 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:28,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1000286896, now seen corresponding path program 1 times [2020-12-23 16:53:28,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:28,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545913338] [2020-12-23 16:53:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545913338] [2020-12-23 16:53:29,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219710048] [2020-12-23 16:53:29,053 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 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 16:53:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 16:53:29,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:29,179 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:53:29,180 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,184 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,185 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,185 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:53:29,350 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:29,353 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,353 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 15 treesize of output 10 [2020-12-23 16:53:29,354 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,362 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,365 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 16:53:29,365 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-23 16:53:29,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:29,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:29,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2020-12-23 16:53:29,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957935465] [2020-12-23 16:53:29,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:53:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:53:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:29,395 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 9 states. [2020-12-23 16:53:29,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,687 INFO L93 Difference]: Finished difference Result 215 states and 245 transitions. [2020-12-23 16:53:29,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:29,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-12-23 16:53:29,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,690 INFO L225 Difference]: With dead ends: 215 [2020-12-23 16:53:29,690 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 16:53:29,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 16:53:29,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 159. [2020-12-23 16:53:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 16:53:29,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 187 transitions. [2020-12-23 16:53:29,701 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 187 transitions. Word has length 27 [2020-12-23 16:53:29,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,701 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 187 transitions. [2020-12-23 16:53:29,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:53:29,701 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 187 transitions. [2020-12-23 16:53:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:29,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,702 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:29,917 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1134300402, now seen corresponding path program 1 times [2020-12-23 16:53:29,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973373476] [2020-12-23 16:53:29,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973373476] [2020-12-23 16:53:30,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518317824] [2020-12-23 16:53:30,091 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 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 16:53:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:30,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 16:53:30,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:30,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:30,205 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,205 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:30,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,235 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:53:30,237 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,237 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:30,335 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:53:30,336 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,342 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,342 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:30,464 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 24 treesize of output 18 [2020-12-23 16:53:30,468 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:30,480 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,485 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:30,487 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,487 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 16:53:30,489 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,497 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,500 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,500 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-23 16:53:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:30,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2020-12-23 16:53:30,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670031678] [2020-12-23 16:53:30,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:53:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:53:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:30,529 INFO L87 Difference]: Start difference. First operand 159 states and 187 transitions. Second operand 18 states. [2020-12-23 16:53:31,435 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-12-23 16:53:31,597 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-23 16:53:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:31,749 INFO L93 Difference]: Finished difference Result 203 states and 230 transitions. [2020-12-23 16:53:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:53:31,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 27 [2020-12-23 16:53:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:31,752 INFO L225 Difference]: With dead ends: 203 [2020-12-23 16:53:31,752 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 16:53:31,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:53:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 16:53:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 151. [2020-12-23 16:53:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 16:53:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2020-12-23 16:53:31,758 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 27 [2020-12-23 16:53:31,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:31,758 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2020-12-23 16:53:31,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:53:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2020-12-23 16:53:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:53:31,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:31,759 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:31,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:31,974 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:31,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:31,976 INFO L82 PathProgramCache]: Analyzing trace with hash 831251234, now seen corresponding path program 4 times [2020-12-23 16:53:31,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:31,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297550991] [2020-12-23 16:53:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:31,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:32,409 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:32,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297550991] [2020-12-23 16:53:32,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950575165] [2020-12-23 16:53:32,409 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 16:53:32,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:32,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:32,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 16:53:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:32,556 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:32,557 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 16:53:32,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:32,586 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:53:32,587 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:32,587 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2020-12-23 16:53:32,840 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 16:53:32,856 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:32,857 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:32,862 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:32,863 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:32,894 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:32,899 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 2 xjuncts. [2020-12-23 16:53:32,899 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:68, output treesize:60 [2020-12-23 16:53:32,987 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-23 16:53:32,987 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:33,020 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,020 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 61 [2020-12-23 16:53:33,023 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,097 INFO L625 ElimStorePlain]: treesize reduction 33, result has 70.5 percent of original size [2020-12-23 16:53:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:33,106 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 29 treesize of output 28 [2020-12-23 16:53:33,107 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,140 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-12-23 16:53:33,140 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:83, output treesize:75 [2020-12-23 16:53:37,226 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 16:53:39,327 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 16:53:41,433 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-23 16:53:43,547 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 16:53:44,228 WARN L197 SmtUtils]: Spent 602.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-23 16:53:44,234 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:44,249 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:44,250 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:44,256 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,256 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 26 [2020-12-23 16:53:44,258 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,263 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:44,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:44,266 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 10 [2020-12-23 16:53:44,267 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,290 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,293 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2020-12-23 16:53:44,293 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:95, output treesize:35 [2020-12-23 16:53:44,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:44,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 27 [2020-12-23 16:53:44,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944523711] [2020-12-23 16:53:44,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:44,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:44,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=624, Unknown=1, NotChecked=0, Total=702 [2020-12-23 16:53:44,386 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand 27 states. [2020-12-23 16:53:45,779 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2020-12-23 16:53:50,761 WARN L197 SmtUtils]: Spent 4.89 s on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-12-23 16:54:09,946 WARN L197 SmtUtils]: Spent 18.28 s on a formula simplification. DAG size of input: 119 DAG size of output: 82 [2020-12-23 16:54:16,225 WARN L197 SmtUtils]: Spent 5.07 s on a formula simplification. DAG size of input: 102 DAG size of output: 63 [2020-12-23 16:54:21,502 WARN L197 SmtUtils]: Spent 5.12 s on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2020-12-23 16:54:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:21,854 INFO L93 Difference]: Finished difference Result 219 states and 240 transitions. [2020-12-23 16:54:21,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:54:21,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-23 16:54:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:21,856 INFO L225 Difference]: With dead ends: 219 [2020-12-23 16:54:21,857 INFO L226 Difference]: Without dead ends: 195 [2020-12-23 16:54:21,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=398, Invalid=1857, Unknown=1, NotChecked=0, Total=2256 [2020-12-23 16:54:21,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-12-23 16:54:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 150. [2020-12-23 16:54:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 16:54:21,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 175 transitions. [2020-12-23 16:54:21,863 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 175 transitions. Word has length 28 [2020-12-23 16:54:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:21,863 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 175 transitions. [2020-12-23 16:54:21,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:54:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 175 transitions. [2020-12-23 16:54:21,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:54:21,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:21,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:22,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:54:22,065 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash 697237728, now seen corresponding path program 1 times [2020-12-23 16:54:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:22,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408552365] [2020-12-23 16:54:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:22,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408552365] [2020-12-23 16:54:22,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367453257] [2020-12-23 16:54:22,497 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 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 16:54:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:54:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:22,643 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 16:54:22,644 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:22,654 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:22,655 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:22,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-12-23 16:54:22,845 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 17 treesize of output 13 [2020-12-23 16:54:22,846 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:22,860 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:22,864 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:22,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:32 [2020-12-23 16:54:22,929 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 28 treesize of output 27 [2020-12-23 16:54:22,930 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:22,945 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:22,955 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:22,955 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:46, output treesize:42 [2020-12-23 16:54:23,475 INFO L348 Elim1Store]: treesize reduction 10, result has 75.6 percent of original size [2020-12-23 16:54:23,476 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 44 [2020-12-23 16:54:23,478 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:23,480 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,511 INFO L625 ElimStorePlain]: treesize reduction 7, result has 80.0 percent of original size [2020-12-23 16:54:23,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,516 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:59, output treesize:3 [2020-12-23 16:54:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:23,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2020-12-23 16:54:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41185748] [2020-12-23 16:54:23,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:54:23,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:23,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:54:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:54:23,557 INFO L87 Difference]: Start difference. First operand 150 states and 175 transitions. Second operand 26 states. [2020-12-23 16:54:29,063 WARN L197 SmtUtils]: Spent 778.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-12-23 16:54:33,090 WARN L197 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-12-23 16:54:38,154 WARN L197 SmtUtils]: Spent 4.99 s on a formula simplification. DAG size of input: 83 DAG size of output: 57 [2020-12-23 16:54:41,128 WARN L197 SmtUtils]: Spent 2.25 s on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-12-23 16:54:49,053 WARN L197 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 89 DAG size of output: 63 [2020-12-23 16:54:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:51,634 INFO L93 Difference]: Finished difference Result 215 states and 244 transitions. [2020-12-23 16:54:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:54:51,634 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-23 16:54:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:51,638 INFO L225 Difference]: With dead ends: 215 [2020-12-23 16:54:51,638 INFO L226 Difference]: Without dead ends: 205 [2020-12-23 16:54:51,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=262, Invalid=1068, Unknown=2, NotChecked=0, Total=1332 [2020-12-23 16:54:51,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-23 16:54:51,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 157. [2020-12-23 16:54:51,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 16:54:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 183 transitions. [2020-12-23 16:54:51,646 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 183 transitions. Word has length 28 [2020-12-23 16:54:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:51,647 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 183 transitions. [2020-12-23 16:54:51,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:54:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 183 transitions. [2020-12-23 16:54:51,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 16:54:51,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:51,648 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:51,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:54:51,850 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:51,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:51,851 INFO L82 PathProgramCache]: Analyzing trace with hash -934715925, now seen corresponding path program 2 times [2020-12-23 16:54:51,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:51,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764566586] [2020-12-23 16:54:51,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:52,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764566586] [2020-12-23 16:54:52,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:54:52,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-23 16:54:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914896495] [2020-12-23 16:54:52,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 16:54:52,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:52,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 16:54:52,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:54:52,057 INFO L87 Difference]: Start difference. First operand 157 states and 183 transitions. Second operand 11 states. [2020-12-23 16:54:52,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:52,404 INFO L93 Difference]: Finished difference Result 225 states and 257 transitions. [2020-12-23 16:54:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:54:52,404 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-12-23 16:54:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:52,406 INFO L225 Difference]: With dead ends: 225 [2020-12-23 16:54:52,406 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 16:54:52,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:54:52,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 16:54:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 159. [2020-12-23 16:54:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 16:54:52,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 186 transitions. [2020-12-23 16:54:52,412 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 186 transitions. Word has length 31 [2020-12-23 16:54:52,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:52,412 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 186 transitions. [2020-12-23 16:54:52,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 16:54:52,413 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 186 transitions. [2020-12-23 16:54:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:54:52,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:52,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:52,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 16:54:52,414 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1853207525, now seen corresponding path program 5 times [2020-12-23 16:54:52,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:52,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741967576] [2020-12-23 16:54:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:52,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741967576] [2020-12-23 16:54:52,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138755929] [2020-12-23 16:54:52,604 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 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 16:54:52,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:54:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:52,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:54:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:52,760 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,761 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 16:54:52,762 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,795 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:54:52,796 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,797 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:52,797 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:21 [2020-12-23 16:54:52,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,849 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,893 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,938 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,977 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,118 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:53,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:53,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2020-12-23 16:54:53,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363464445] [2020-12-23 16:54:53,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:54:53,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:53,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:54:53,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:54:53,618 INFO L87 Difference]: Start difference. First operand 159 states and 186 transitions. Second operand 23 states. [2020-12-23 16:54:55,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:55,682 INFO L93 Difference]: Finished difference Result 242 states and 275 transitions. [2020-12-23 16:54:55,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:54:55,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 32 [2020-12-23 16:54:55,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:55,687 INFO L225 Difference]: With dead ends: 242 [2020-12-23 16:54:55,687 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 16:54:55,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:54:55,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 16:54:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 173. [2020-12-23 16:54:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 16:54:55,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 202 transitions. [2020-12-23 16:54:55,697 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 202 transitions. Word has length 32 [2020-12-23 16:54:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:55,697 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 202 transitions. [2020-12-23 16:54:55,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:54:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 202 transitions. [2020-12-23 16:54:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 16:54:55,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:55,698 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:55,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 16:54:55,901 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:55,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:55,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1478995618, now seen corresponding path program 6 times [2020-12-23 16:54:55,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:55,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548564058] [2020-12-23 16:54:55,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:56,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548564058] [2020-12-23 16:54:56,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780820009] [2020-12-23 16:54:56,301 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 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 16:54:56,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:54:56,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:56,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:54:56,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:56,772 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:56,774 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:56,788 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:56,791 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 16:54:56,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-23 16:54:56,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:56,871 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 16:54:56,873 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:56,886 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:56,888 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:56,889 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:27 [2020-12-23 16:54:57,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:57,366 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:57,374 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:57,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 25 [2020-12-23 16:54:57,377 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:57,379 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:57,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:57,390 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 16:54:57,390 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:38, output treesize:3 [2020-12-23 16:54:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:57,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:57,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 30 [2020-12-23 16:54:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423586731] [2020-12-23 16:54:57,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:54:57,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:57,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:54:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:54:57,403 INFO L87 Difference]: Start difference. First operand 173 states and 202 transitions. Second operand 30 states. [2020-12-23 16:54:59,104 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 44 [2020-12-23 16:54:59,409 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-12-23 16:54:59,708 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-12-23 16:54:59,930 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-12-23 16:55:00,262 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-12-23 16:55:00,568 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-12-23 16:55:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:00,763 INFO L93 Difference]: Finished difference Result 307 states and 338 transitions. [2020-12-23 16:55:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:55:00,764 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-12-23 16:55:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:00,766 INFO L225 Difference]: With dead ends: 307 [2020-12-23 16:55:00,766 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 16:55:00,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=488, Invalid=2704, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:55:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 16:55:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 182. [2020-12-23 16:55:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 16:55:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 211 transitions. [2020-12-23 16:55:00,773 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 211 transitions. Word has length 34 [2020-12-23 16:55:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:00,773 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 211 transitions. [2020-12-23 16:55:00,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:55:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 211 transitions. [2020-12-23 16:55:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 16:55:00,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:00,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:00,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:00,989 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1456363364, now seen corresponding path program 2 times [2020-12-23 16:55:00,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:00,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86726369] [2020-12-23 16:55:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:01,706 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:01,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86726369] [2020-12-23 16:55:01,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157692680] [2020-12-23 16:55:01,707 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 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 16:55:01,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:01,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:55:01,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:01,802 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 16:55:01,804 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:01,817 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:01,818 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:01,818 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:22 [2020-12-23 16:55:02,118 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 17 treesize of output 13 [2020-12-23 16:55:02,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,140 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:02,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:35 [2020-12-23 16:55:02,222 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 28 treesize of output 27 [2020-12-23 16:55:02,224 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,251 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 5 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:02,251 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:49, output treesize:45 [2020-12-23 16:55:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:03,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:03,159 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:03,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 64 [2020-12-23 16:55:03,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:03,165 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:55:03,168 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:03,235 INFO L625 ElimStorePlain]: treesize reduction 10, result has 83.3 percent of original size [2020-12-23 16:55:03,242 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:03,242 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:80, output treesize:3 [2020-12-23 16:55:03,258 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:55:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2020-12-23 16:55:03,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319478022] [2020-12-23 16:55:03,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:55:03,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:03,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:55:03,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:55:03,261 INFO L87 Difference]: Start difference. First operand 182 states and 211 transitions. Second operand 30 states. [2020-12-23 16:55:04,559 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-12-23 16:55:06,774 WARN L197 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 58 DAG size of output: 37 [2020-12-23 16:55:11,046 WARN L197 SmtUtils]: Spent 4.18 s on a formula simplification. DAG size of input: 71 DAG size of output: 45 [2020-12-23 16:55:15,271 WARN L197 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-12-23 16:55:15,630 WARN L197 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 55 [2020-12-23 16:55:21,937 WARN L197 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-12-23 16:55:28,311 WARN L197 SmtUtils]: Spent 6.26 s on a formula simplification. DAG size of input: 107 DAG size of output: 68 [2020-12-23 16:55:32,623 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-12-23 16:55:36,994 WARN L197 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-12-23 16:55:45,498 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2020-12-23 16:56:03,886 WARN L197 SmtUtils]: Spent 5.13 s on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-12-23 16:56:14,037 WARN L197 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-12-23 16:56:24,378 WARN L197 SmtUtils]: Spent 4.22 s on a formula simplification. DAG size of input: 88 DAG size of output: 69 [2020-12-23 16:56:36,788 WARN L197 SmtUtils]: Spent 10.29 s on a formula simplification. DAG size of input: 107 DAG size of output: 70 [2020-12-23 16:56:45,337 WARN L197 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-12-23 16:56:52,028 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-12-23 16:57:04,445 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-12-23 16:57:09,121 WARN L197 SmtUtils]: Spent 4.32 s on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-12-23 16:57:24,790 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48