/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/list-properties/list_flag-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 17:18:45,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 17:18:45,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 17:18:46,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 17:18:46,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 17:18:46,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 17:18:46,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 17:18:46,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 17:18:46,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 17:18:46,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 17:18:46,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 17:18:46,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 17:18:46,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 17:18:46,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 17:18:46,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 17:18:46,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 17:18:46,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 17:18:46,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 17:18:46,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 17:18:46,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 17:18:46,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 17:18:46,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 17:18:46,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 17:18:46,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 17:18:46,111 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 17:18:46,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 17:18:46,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 17:18:46,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 17:18:46,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 17:18:46,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 17:18:46,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 17:18:46,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 17:18:46,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 17:18:46,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 17:18:46,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 17:18:46,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 17:18:46,146 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 17:18:46,210 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 17:18:46,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 17:18:46,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 17:18:46,218 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 17:18:46,219 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 17:18:46,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 17:18:46,219 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 17:18:46,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 17:18:46,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 17:18:46,221 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 17:18:46,223 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 17:18:46,223 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 17:18:46,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 17:18:46,224 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 17:18:46,224 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 17:18:46,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 17:18:46,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 17:18:46,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 17:18:46,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 17:18:46,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 17:18:46,226 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 17:18:46,227 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 17:18:46,227 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 17:18:46,227 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 17:18:46,228 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 17:18:46,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 17:18:46,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 17:18:46,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 17:18:46,770 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 17:18:46,771 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 17:18:46,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-23 17:18:46,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bcabc6930/41f216f876eb4653a9e70568e536445a/FLAGfb8b62e8f [2020-12-23 17:18:47,688 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 17:18:47,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-23 17:18:47,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bcabc6930/41f216f876eb4653a9e70568e536445a/FLAGfb8b62e8f [2020-12-23 17:18:47,975 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/bcabc6930/41f216f876eb4653a9e70568e536445a [2020-12-23 17:18:47,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 17:18:47,982 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 17:18:47,986 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 17:18:47,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 17:18:47,991 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 17:18:47,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:18:47" (1/1) ... [2020-12-23 17:18:47,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51a414ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:47, skipping insertion in model container [2020-12-23 17:18:47,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 05:18:47" (1/1) ... [2020-12-23 17:18:48,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 17:18:48,071 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 17:18:48,467 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-23 17:18:48,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:18:48,485 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 17:18:48,529 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-23 17:18:48,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 17:18:48,596 INFO L208 MainTranslator]: Completed translation [2020-12-23 17:18:48,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48 WrapperNode [2020-12-23 17:18:48,597 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 17:18:48,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 17:18:48,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 17:18:48,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 17:18:48,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,629 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,659 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 17:18:48,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 17:18:48,661 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 17:18:48,661 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 17:18:48,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,711 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (1/1) ... [2020-12-23 17:18:48,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 17:18:48,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 17:18:48,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 17:18:48,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 17:18:48,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (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 17:18:48,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 17:18:48,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 17:18:48,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 17:18:48,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 17:18:48,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 17:18:48,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 17:18:48,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 17:18:48,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 17:18:48,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 17:18:49,572 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 17:18:49,572 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 17:18:49,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:18:49 BoogieIcfgContainer [2020-12-23 17:18:49,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 17:18:49,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 17:18:49,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 17:18:49,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 17:18:49,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 05:18:47" (1/3) ... [2020-12-23 17:18:49,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa1bf11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:18:49, skipping insertion in model container [2020-12-23 17:18:49,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 05:18:48" (2/3) ... [2020-12-23 17:18:49,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aa1bf11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 05:18:49, skipping insertion in model container [2020-12-23 17:18:49,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:18:49" (3/3) ... [2020-12-23 17:18:49,588 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-12-23 17:18:49,597 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 17:18:49,604 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-12-23 17:18:49,632 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-12-23 17:18:49,662 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 17:18:49,663 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 17:18:49,663 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 17:18:49,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 17:18:49,663 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 17:18:49,664 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 17:18:49,664 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 17:18:49,664 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 17:18:49,684 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-12-23 17:18:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 17:18:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:18:49,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 17:18:49,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:18:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:18:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash 889600232, now seen corresponding path program 1 times [2020-12-23 17:18:49,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:18:49,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854846297] [2020-12-23 17:18:49,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:18:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:18:49,916 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 17:18:49,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854846297] [2020-12-23 17:18:49,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:18:49,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 17:18:49,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959828370] [2020-12-23 17:18:49,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 17:18:49,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:18:49,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 17:18:49,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:18:49,949 INFO L87 Difference]: Start difference. First operand 55 states. Second operand 2 states. [2020-12-23 17:18:49,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:18:49,970 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-12-23 17:18:49,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 17:18:49,971 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 17:18:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:18:49,983 INFO L225 Difference]: With dead ends: 55 [2020-12-23 17:18:49,984 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 17:18:49,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 17:18:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 17:18:50,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 17:18:50,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 17:18:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-12-23 17:18:50,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 6 [2020-12-23 17:18:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:18:50,036 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-12-23 17:18:50,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 17:18:50,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-12-23 17:18:50,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:18:50,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:18:50,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:18:50,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 17:18:50,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:18:50,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:18:50,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769740, now seen corresponding path program 1 times [2020-12-23 17:18:50,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:18:50,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159875976] [2020-12-23 17:18:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:18:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:18:50,117 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 17:18:50,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159875976] [2020-12-23 17:18:50,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:18:50,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:18:50,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920606443] [2020-12-23 17:18:50,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:18:50,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:18:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:18:50,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:18:50,123 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 4 states. [2020-12-23 17:18:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:18:50,277 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2020-12-23 17:18:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:18:50,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 17:18:50,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:18:50,281 INFO L225 Difference]: With dead ends: 59 [2020-12-23 17:18:50,281 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 17:18:50,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:18:50,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 17:18:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-23 17:18:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-23 17:18:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-23 17:18:50,293 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 7 [2020-12-23 17:18:50,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:18:50,294 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-23 17:18:50,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:18:50,294 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-23 17:18:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 17:18:50,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:18:50,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:18:50,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 17:18:50,296 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:18:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:18:50,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769741, now seen corresponding path program 1 times [2020-12-23 17:18:50,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:18:50,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846549227] [2020-12-23 17:18:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:18:50,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:18:50,392 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 17:18:50,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846549227] [2020-12-23 17:18:50,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:18:50,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 17:18:50,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484767225] [2020-12-23 17:18:50,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 17:18:50,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:18:50,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 17:18:50,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 17:18:50,396 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 4 states. [2020-12-23 17:18:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:18:50,559 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-12-23 17:18:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 17:18:50,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 17:18:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:18:50,561 INFO L225 Difference]: With dead ends: 72 [2020-12-23 17:18:50,562 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 17:18:50,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 17:18:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 17:18:50,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 63. [2020-12-23 17:18:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 17:18:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-12-23 17:18:50,571 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 7 [2020-12-23 17:18:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:18:50,572 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-12-23 17:18:50,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 17:18:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-12-23 17:18:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:18:50,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:18:50,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:18:50,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 17:18:50,574 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:18:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:18:50,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1102404369, now seen corresponding path program 1 times [2020-12-23 17:18:50,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:18:50,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361713679] [2020-12-23 17:18:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:18:50,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 17:18:50,692 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 17:18:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361713679] [2020-12-23 17:18:50,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 17:18:50,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 17:18:50,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142140766] [2020-12-23 17:18:50,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 17:18:50,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 17:18:50,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 17:18:50,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 17:18:50,696 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 6 states. [2020-12-23 17:18:50,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 17:18:50,899 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2020-12-23 17:18:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 17:18:50,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 17:18:50,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 17:18:50,902 INFO L225 Difference]: With dead ends: 106 [2020-12-23 17:18:50,902 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 17:18:50,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 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 17:18:50,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 17:18:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 71. [2020-12-23 17:18:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 17:18:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2020-12-23 17:18:50,913 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 14 [2020-12-23 17:18:50,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 17:18:50,914 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2020-12-23 17:18:50,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 17:18:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2020-12-23 17:18:50,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 17:18:50,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 17:18:50,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 17:18:50,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 17:18:50,916 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 17:18:50,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 17:18:50,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1102404529, now seen corresponding path program 1 times [2020-12-23 17:18:50,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 17:18:50,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767495114] [2020-12-23 17:18:50,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 17:18:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:18:50,968 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:18:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 17:18:50,994 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 17:18:51,058 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 17:18:51,059 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 17:18:51,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 17:18:51,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 05:18:51 BoogieIcfgContainer [2020-12-23 17:18:51,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 17:18:51,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 17:18:51,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 17:18:51,097 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 17:18:51,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 05:18:49" (3/4) ... [2020-12-23 17:18:51,104 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 17:18:51,104 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 17:18:51,107 INFO L168 Benchmark]: Toolchain (without parser) took 3123.38 ms. Allocated memory is still 153.1 MB. Free memory was 127.5 MB in the beginning and 104.2 MB in the end (delta: 23.3 MB). Peak memory consumption was 24.4 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,107 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:18:51,108 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.19 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 105.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,109 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.97 ms. Allocated memory is still 153.1 MB. Free memory was 105.5 MB in the beginning and 103.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,110 INFO L168 Benchmark]: Boogie Preprocessor took 56.67 ms. Allocated memory is still 153.1 MB. Free memory was 103.6 MB in the beginning and 135.4 MB in the end (delta: -31.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,111 INFO L168 Benchmark]: RCFGBuilder took 857.87 ms. Allocated memory is still 153.1 MB. Free memory was 135.4 MB in the beginning and 112.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,112 INFO L168 Benchmark]: TraceAbstraction took 1518.47 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 104.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2020-12-23 17:18:51,113 INFO L168 Benchmark]: Witness Printer took 7.40 ms. Allocated memory is still 153.1 MB. Free memory is still 104.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 17:18:51,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 611.19 ms. Allocated memory is still 153.1 MB. Free memory was 127.4 MB in the beginning and 105.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 60.97 ms. Allocated memory is still 153.1 MB. Free memory was 105.5 MB in the beginning and 103.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 56.67 ms. Allocated memory is still 153.1 MB. Free memory was 103.6 MB in the beginning and 135.4 MB in the end (delta: -31.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 857.87 ms. Allocated memory is still 153.1 MB. Free memory was 135.4 MB in the beginning and 112.3 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1518.47 ms. Allocated memory is still 153.1 MB. Free memory was 111.8 MB in the beginning and 104.2 MB in the end (delta: 7.6 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. * Witness Printer took 7.40 ms. Allocated memory is still 153.1 MB. Free memory is still 104.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 55 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 147 SDtfs, 273 SDslu, 133 SDs, 0 SdLazy, 213 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 49 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 1276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...