/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-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:07:18,023 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:07:18,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:07:18,064 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:07:18,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:07:18,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:07:18,068 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:07:18,071 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:07:18,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:07:18,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:07:18,077 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:07:18,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:07:18,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:07:18,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:07:18,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:07:18,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:07:18,085 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:07:18,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:07:18,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:07:18,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:07:18,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:07:18,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:07:18,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:07:18,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:07:18,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 16:07:18,110 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 16:07:18,111 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 16:07:18,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 16:07:18,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 16:07:18,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 16:07:18,118 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:07:18,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:07:18,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:07:18,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:07:18,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:07:18,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:07:18,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:07:18,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:07:18,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:07:18,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:07:18,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:07:18,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:07:18,221 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:07:18,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:07:18,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:07:18,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:07:18,227 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:07:18,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:07:18,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:07:18,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:07:18,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:07:18,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:07:18,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:07:18,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:07:18,230 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:07:18,231 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:07:18,231 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:07:18,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:07:18,232 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:07:18,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:07:18,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:07:18,233 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:07:18,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:07:18,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:07:18,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:07:18,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:07:18,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:07:18,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:07:18,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:07:18,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:07:18,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:07:18,741 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:07:18,742 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:07:18,743 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-01-06 16:07:18,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33808dab0/01dcd94b314445aaac57fe5390e8d9f0/FLAGc8d44ae63 [2021-01-06 16:07:19,686 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:07:19,686 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-01-06 16:07:19,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33808dab0/01dcd94b314445aaac57fe5390e8d9f0/FLAGc8d44ae63 [2021-01-06 16:07:19,929 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/33808dab0/01dcd94b314445aaac57fe5390e8d9f0 [2021-01-06 16:07:19,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:07:19,934 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:07:19,940 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:19,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:07:19,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:07:19,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:19" (1/1) ... [2021-01-06 16:07:19,948 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f7e4db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:19, skipping insertion in model container [2021-01-06 16:07:19,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:07:19" (1/1) ... [2021-01-06 16:07:19,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:07:20,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:07:20,423 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/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~node~0,],base],StructAccessExpression[IdentifierExpression[~node~0,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~ppnode,] left hand side expression in assignment: address: IdentifierExpression[~pp2,] left hand side expression in assignment: address: IdentifierExpression[~pp1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~list~1,] [2021-01-06 16:07:20,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:20,525 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:07:20,600 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/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~ptr~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~ptr~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~node~0,],base],StructAccessExpression[IdentifierExpression[~node~0,],offset]]] left hand side expression in assignment: address: IdentifierExpression[~ppnode,] left hand side expression in assignment: address: IdentifierExpression[~pp2,] left hand side expression in assignment: address: IdentifierExpression[~pp1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~next~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~next~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~list,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~list,],base],StructAccessExpression[IdentifierExpression[~list,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~list,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~beg,] left hand side expression in assignment: lhs: VariableLHS[~list~1,] [2021-01-06 16:07:20,646 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:07:20,775 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:07:20,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20 WrapperNode [2021-01-06 16:07:20,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:07:20,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:20,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:07:20,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:07:20,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,826 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:07:20,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:07:20,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:07:20,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:07:20,929 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,953 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:20,991 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (1/1) ... [2021-01-06 16:07:21,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:07:21,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:07:21,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:07:21,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:07:21,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (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 [2021-01-06 16:07:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 16:07:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 16:07:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:07:21,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 16:07:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 16:07:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-01-06 16:07:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:07:21,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:07:21,121 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:07:22,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:07:22,035 INFO L299 CfgBuilder]: Removed 137 assume(true) statements. [2021-01-06 16:07:22,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:22 BoogieIcfgContainer [2021-01-06 16:07:22,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:07:22,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:07:22,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:07:22,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:07:22,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:07:19" (1/3) ... [2021-01-06 16:07:22,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21273b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:22, skipping insertion in model container [2021-01-06 16:07:22,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:07:20" (2/3) ... [2021-01-06 16:07:22,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21273b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:07:22, skipping insertion in model container [2021-01-06 16:07:22,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:22" (3/3) ... [2021-01-06 16:07:22,048 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-01-06 16:07:22,056 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:07:22,062 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2021-01-06 16:07:22,084 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-01-06 16:07:22,117 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:07:22,117 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:07:22,117 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:07:22,117 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:07:22,117 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:07:22,118 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:07:22,118 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:07:22,118 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:07:22,143 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states. [2021-01-06 16:07:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:07:22,150 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:22,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:07:22,152 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:22,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:22,158 INFO L82 PathProgramCache]: Analyzing trace with hash 586891724, now seen corresponding path program 1 times [2021-01-06 16:07:22,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:22,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134643641] [2021-01-06 16:07:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:22,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:07:22,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134643641] [2021-01-06 16:07:22,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:22,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:07:22,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443071667] [2021-01-06 16:07:22,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:07:22,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:22,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:07:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:07:22,378 INFO L87 Difference]: Start difference. First operand 147 states. Second operand 2 states. [2021-01-06 16:07:22,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:22,423 INFO L93 Difference]: Finished difference Result 292 states and 486 transitions. [2021-01-06 16:07:22,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:07:22,425 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2021-01-06 16:07:22,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:22,438 INFO L225 Difference]: With dead ends: 292 [2021-01-06 16:07:22,439 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 16:07:22,444 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 [2021-01-06 16:07:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 16:07:22,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-01-06 16:07:22,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2021-01-06 16:07:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 152 transitions. [2021-01-06 16:07:22,501 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 152 transitions. Word has length 13 [2021-01-06 16:07:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:22,502 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 152 transitions. [2021-01-06 16:07:22,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:07:22,502 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 152 transitions. [2021-01-06 16:07:22,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 16:07:22,503 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:22,504 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] [2021-01-06 16:07:22,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:07:22,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:22,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1788456629, now seen corresponding path program 1 times [2021-01-06 16:07:22,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:22,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723336251] [2021-01-06 16:07:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:07:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723336251] [2021-01-06 16:07:23,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:23,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-01-06 16:07:23,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007458681] [2021-01-06 16:07:23,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:07:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:07:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:07:23,089 INFO L87 Difference]: Start difference. First operand 141 states and 152 transitions. Second operand 12 states. [2021-01-06 16:07:23,905 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-01-06 16:07:24,071 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-01-06 16:07:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:24,671 INFO L93 Difference]: Finished difference Result 234 states and 252 transitions. [2021-01-06 16:07:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:07:24,672 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2021-01-06 16:07:24,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:24,674 INFO L225 Difference]: With dead ends: 234 [2021-01-06 16:07:24,675 INFO L226 Difference]: Without dead ends: 230 [2021-01-06 16:07:24,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:07:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-01-06 16:07:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 144. [2021-01-06 16:07:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 16:07:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2021-01-06 16:07:24,698 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 24 [2021-01-06 16:07:24,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:24,698 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2021-01-06 16:07:24,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:07:24,699 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2021-01-06 16:07:24,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:07:24,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:24,700 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] [2021-01-06 16:07:24,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:07:24,700 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash 720092185, now seen corresponding path program 1 times [2021-01-06 16:07:24,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:24,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116262912] [2021-01-06 16:07:24,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:07:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:07:25,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116262912] [2021-01-06 16:07:25,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:07:25,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-01-06 16:07:25,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11469834] [2021-01-06 16:07:25,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:07:25,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:07:25,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:07:25,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:07:25,203 INFO L87 Difference]: Start difference. First operand 144 states and 156 transitions. Second operand 13 states. [2021-01-06 16:07:26,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:07:26,208 INFO L93 Difference]: Finished difference Result 252 states and 273 transitions. [2021-01-06 16:07:26,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:07:26,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2021-01-06 16:07:26,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:07:26,212 INFO L225 Difference]: With dead ends: 252 [2021-01-06 16:07:26,212 INFO L226 Difference]: Without dead ends: 248 [2021-01-06 16:07:26,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:07:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-01-06 16:07:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 144. [2021-01-06 16:07:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2021-01-06 16:07:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 156 transitions. [2021-01-06 16:07:26,233 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 156 transitions. Word has length 26 [2021-01-06 16:07:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:07:26,234 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 156 transitions. [2021-01-06 16:07:26,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:07:26,234 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 156 transitions. [2021-01-06 16:07:26,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 16:07:26,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:07:26,235 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, 1, 1, 1] [2021-01-06 16:07:26,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 16:07:26,235 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr16ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr15ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr17ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr18ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr12ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr19ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr10ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr14ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr13ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr11ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:07:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:07:26,236 INFO L82 PathProgramCache]: Analyzing trace with hash 586745765, now seen corresponding path program 1 times [2021-01-06 16:07:26,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:07:26,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862363098] [2021-01-06 16:07:26,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:07:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:26,343 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:07:26,401 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:07:26,448 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:07:26,448 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:07:26,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:07:26,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:07:26 BoogieIcfgContainer [2021-01-06 16:07:26,506 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:07:26,507 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:07:26,507 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:07:26,507 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:07:26,508 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:07:22" (3/4) ... [2021-01-06 16:07:26,510 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:07:26,614 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/heap-manipulation/sll_to_dll_rev-1.i-witness.graphml [2021-01-06 16:07:26,615 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:07:26,618 INFO L168 Benchmark]: Toolchain (without parser) took 6681.77 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 130.2 MB in the beginning and 189.0 MB in the end (delta: -58.8 MB). Peak memory consumption was 116.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,619 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 156.2 MB. Free memory was 130.6 MB in the beginning and 130.6 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:07:26,621 INFO L168 Benchmark]: CACSL2BoogieTranslator took 837.19 ms. Allocated memory is still 156.2 MB. Free memory was 129.9 MB in the beginning and 137.7 MB in the end (delta: -7.8 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,621 INFO L168 Benchmark]: Boogie Procedure Inliner took 134.54 ms. Allocated memory is still 156.2 MB. Free memory was 137.7 MB in the beginning and 134.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,622 INFO L168 Benchmark]: Boogie Preprocessor took 89.31 ms. Allocated memory is still 156.2 MB. Free memory was 134.5 MB in the beginning and 131.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,624 INFO L168 Benchmark]: RCFGBuilder took 1031.48 ms. Allocated memory is still 156.2 MB. Free memory was 131.4 MB in the beginning and 76.3 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,624 INFO L168 Benchmark]: TraceAbstraction took 4466.68 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 75.8 MB in the beginning and 72.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 56.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,625 INFO L168 Benchmark]: Witness Printer took 108.09 ms. Allocated memory is still 209.7 MB. Free memory was 72.6 MB in the beginning and 189.0 MB in the end (delta: -116.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 16:07:26,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 156.2 MB. Free memory was 130.6 MB in the beginning and 130.6 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 837.19 ms. Allocated memory is still 156.2 MB. Free memory was 129.9 MB in the beginning and 137.7 MB in the end (delta: -7.8 MB). Peak memory consumption was 27.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 134.54 ms. Allocated memory is still 156.2 MB. Free memory was 137.7 MB in the beginning and 134.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 89.31 ms. Allocated memory is still 156.2 MB. Free memory was 134.5 MB in the beginning and 131.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1031.48 ms. Allocated memory is still 156.2 MB. Free memory was 131.4 MB in the beginning and 76.3 MB in the end (delta: 55.0 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4466.68 ms. Allocated memory was 156.2 MB in the beginning and 209.7 MB in the end (delta: 53.5 MB). Free memory was 75.8 MB in the beginning and 72.6 MB in the end (delta: 3.2 MB). Peak memory consumption was 56.7 MB. Max. memory is 8.0 GB. * Witness Printer took 108.09 ms. Allocated memory is still 209.7 MB. Free memory was 72.6 MB in the beginning and 189.0 MB in the end (delta: -116.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L588] struct node *list = ((void *)0); [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; [L640] struct node *list = create_sll(&p1, &p2); [L642] \read(*p1) [L642] \read(*p2) [L626] COND FALSE !(!(beg)) [L627] COND FALSE !(!(end)) [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg [L629] COND TRUE !(beg) [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 147 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 373 SDtfs, 843 SDslu, 1471 SDs, 0 SdLazy, 678 SolverSat, 126 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 48 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=0, 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, 3 MinimizatonAttempts, 190 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 22690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 proved your program to be incorrect! Received shutdown request...