/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/list-properties/simple-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:08:34,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:08:34,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:08:34,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:08:34,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:08:34,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:08:34,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:08:34,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:08:34,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:08:34,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:08:34,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:08:34,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:08:34,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:08:34,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:08:34,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:08:34,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:08:34,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:08:34,244 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:08:34,246 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:08:34,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:08:34,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:08:34,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:08:34,253 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:08:34,254 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:08:34,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:08:34,267 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:08:34,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:08:34,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:08:34,270 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 16:08:34,299 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:08:34,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:08:34,301 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:08:34,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:08:34,302 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:08:34,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:08:34,302 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:08:34,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:08:34,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:08:34,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:08:34,303 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:08:34,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:08:34,304 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:08:34,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:08:34,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:08:34,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:08:34,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:08:34,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:08:34,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:08:34,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:08:34,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:08:34,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:08:34,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:08:34,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:08:34,306 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:08:34,307 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:08:34,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:08:34,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:08:34,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:08:34,701 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:08:34,701 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:08:34,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-1.i [2021-01-06 16:08:34,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10ee0418a/0d41be3d1c824a93a124c5ae1b4f7a26/FLAGa6d781665 [2021-01-06 16:08:35,469 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:08:35,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/simple-1.i [2021-01-06 16:08:35,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10ee0418a/0d41be3d1c824a93a124c5ae1b4f7a26/FLAGa6d781665 [2021-01-06 16:08:35,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/10ee0418a/0d41be3d1c824a93a124c5ae1b4f7a26 [2021-01-06 16:08:35,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:08:35,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:08:35,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:08:35,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:08:35,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:08:35,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:08:35" (1/1) ... [2021-01-06 16:08:35,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cef170 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:35, skipping insertion in model container [2021-01-06 16:08:35,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:08:35" (1/1) ... [2021-01-06 16:08:35,778 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:08:35,839 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~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: 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,] [2021-01-06 16:08:36,263 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/simple-1.i[23237,23250] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2021-01-06 16:08:36,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:08:36,289 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,],base],StructAccessExpression[IdentifierExpression[~a~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: 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,] [2021-01-06 16:08:36,375 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/simple-1.i[23237,23250] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2021-01-06 16:08:36,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:08:36,458 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:08:36,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36 WrapperNode [2021-01-06 16:08:36,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:08:36,462 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:08:36,462 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:08:36,462 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:08:36,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,542 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:08:36,545 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:08:36,545 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:08:36,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:08:36,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,611 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (1/1) ... [2021-01-06 16:08:36,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:08:36,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:08:36,626 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:08:36,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:08:36,627 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (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 16:08:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 16:08:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 16:08:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 16:08:36,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 16:08:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:08:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 16:08:36,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:08:36,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:08:36,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:08:37,131 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:08:37,131 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-01-06 16:08:37,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:08:37 BoogieIcfgContainer [2021-01-06 16:08:37,133 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:08:37,135 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:08:37,136 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:08:37,139 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:08:37,139 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:08:35" (1/3) ... [2021-01-06 16:08:37,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ee9cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:08:37, skipping insertion in model container [2021-01-06 16:08:37,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:08:36" (2/3) ... [2021-01-06 16:08:37,141 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ee9cc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:08:37, skipping insertion in model container [2021-01-06 16:08:37,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:08:37" (3/3) ... [2021-01-06 16:08:37,143 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-1.i [2021-01-06 16:08:37,164 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:08:37,180 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:08:37,227 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:08:37,262 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:08:37,263 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:08:37,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:08:37,263 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:08:37,263 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:08:37,263 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:08:37,263 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:08:37,264 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:08:37,279 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 16:08:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:08:37,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:08:37,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:08:37,286 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:08:37,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:08:37,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2114193284, now seen corresponding path program 1 times [2021-01-06 16:08:37,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:08:37,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791720903] [2021-01-06 16:08:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:08:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:08:37,492 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 16:08:37,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791720903] [2021-01-06 16:08:37,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:08:37,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:08:37,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525247033] [2021-01-06 16:08:37,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:08:37,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:08:37,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:08:37,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:08:37,521 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 16:08:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:08:37,542 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-01-06 16:08:37,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:08:37,544 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 16:08:37,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:08:37,553 INFO L225 Difference]: With dead ends: 30 [2021-01-06 16:08:37,554 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:08:37,557 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 16:08:37,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:08:37,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:08:37,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:08:37,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:08:37,596 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-01-06 16:08:37,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:08:37,597 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:08:37,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:08:37,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:08:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:08:37,598 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:08:37,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:08:37,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:08:37,599 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:08:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:08:37,600 INFO L82 PathProgramCache]: Analyzing trace with hash 672844787, now seen corresponding path program 1 times [2021-01-06 16:08:37,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:08:37,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487459362] [2021-01-06 16:08:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:08:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:08:37,795 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 16:08:37,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487459362] [2021-01-06 16:08:37,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:08:37,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:08:37,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886194882] [2021-01-06 16:08:37,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:08:37,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:08:37,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:08:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:08:37,802 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 5 states. [2021-01-06 16:08:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:08:38,007 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-01-06 16:08:38,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:08:38,008 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-01-06 16:08:38,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:08:38,010 INFO L225 Difference]: With dead ends: 29 [2021-01-06 16:08:38,010 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 16:08:38,011 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:08:38,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 16:08:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-01-06 16:08:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:08:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-01-06 16:08:38,018 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 10 [2021-01-06 16:08:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:08:38,018 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-01-06 16:08:38,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:08:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-01-06 16:08:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:08:38,020 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:08:38,020 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:08:38,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:08:38,021 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:08:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:08:38,022 INFO L82 PathProgramCache]: Analyzing trace with hash 111486456, now seen corresponding path program 1 times [2021-01-06 16:08:38,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:08:38,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432909670] [2021-01-06 16:08:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:08:38,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:08:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:08:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432909670] [2021-01-06 16:08:38,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335879010] [2021-01-06 16:08:38,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:08:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:08:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:08:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:08:38,518 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-06 16:08:38,521 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,535 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:08:38,542 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-01-06 16:08:38,544 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,559 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:08:38,563 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,563 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2021-01-06 16:08:38,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 16:08:38,620 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:08:38,640 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 16:08:38,643 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,651 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 16:08:38,652 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 16:08:38,653 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2021-01-06 16:08:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:08:38,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:08:38,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-01-06 16:08:38,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121581319] [2021-01-06 16:08:38,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:08:38,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:08:38,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:08:38,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:08:38,665 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states. [2021-01-06 16:08:38,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:08:38,833 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-01-06 16:08:38,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:08:38,834 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-01-06 16:08:38,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:08:38,835 INFO L225 Difference]: With dead ends: 33 [2021-01-06 16:08:38,835 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:08:38,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:08:38,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:08:38,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-01-06 16:08:38,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:08:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-01-06 16:08:38,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2021-01-06 16:08:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:08:38,840 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-01-06 16:08:38,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:08:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-01-06 16:08:38,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 16:08:38,841 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:08:38,841 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:08:39,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:08:39,055 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:08:39,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:08:39,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1682540518, now seen corresponding path program 1 times [2021-01-06 16:08:39,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:08:39,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620527307] [2021-01-06 16:08:39,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:08:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:08:39,110 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:08:39,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 16:08:39,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 16:08:39,223 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 16:08:39,224 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 16:08:39,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 16:08:39,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 04:08:39 BoogieIcfgContainer [2021-01-06 16:08:39,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 16:08:39,268 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 16:08:39,268 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 16:08:39,268 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 16:08:39,269 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:08:37" (3/4) ... [2021-01-06 16:08:39,271 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 16:08:39,327 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-properties/simple-1.i-witness.graphml [2021-01-06 16:08:39,328 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 16:08:39,329 INFO L168 Benchmark]: Toolchain (without parser) took 3573.54 ms. Allocated memory is still 151.0 MB. Free memory was 125.7 MB in the beginning and 114.2 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,330 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 16:08:39,331 INFO L168 Benchmark]: CACSL2BoogieTranslator took 700.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 103.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,331 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.56 ms. Allocated memory is still 151.0 MB. Free memory was 103.6 MB in the beginning and 101.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,332 INFO L168 Benchmark]: Boogie Preprocessor took 78.82 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 134.2 MB in the end (delta: -32.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,333 INFO L168 Benchmark]: RCFGBuilder took 508.71 ms. Allocated memory is still 151.0 MB. Free memory was 134.2 MB in the beginning and 117.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,334 INFO L168 Benchmark]: TraceAbstraction took 2131.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 116.3 MB in the end (delta: 343.2 kB). Peak memory consumption was 343.2 kB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,335 INFO L168 Benchmark]: Witness Printer took 59.99 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 16:08:39,339 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 700.15 ms. Allocated memory is still 151.0 MB. Free memory was 125.5 MB in the beginning and 103.6 MB in the end (delta: 21.8 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 82.56 ms. Allocated memory is still 151.0 MB. Free memory was 103.6 MB in the beginning and 101.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.82 ms. Allocated memory is still 151.0 MB. Free memory was 101.8 MB in the beginning and 134.2 MB in the end (delta: -32.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 508.71 ms. Allocated memory is still 151.0 MB. Free memory was 134.2 MB in the beginning and 117.2 MB in the end (delta: 17.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2131.75 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 116.3 MB in the end (delta: 343.2 kB). Peak memory consumption was 343.2 kB. Max. memory is 8.0 GB. * Witness Printer took 59.99 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 549]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] a->h = 2 [L537] COND TRUE __VERIFIER_nondet_int() [L538] p->h = 1 [L539] t = (List) malloc(sizeof(struct node)) [L540] COND FALSE !(t == 0) [L541] p->n = t [L542] EXPR p->n [L542] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L544] p->h = 2 [L545] p->n = 0 [L546] p = a [L547] COND TRUE p!=0 [L548] EXPR p->h [L548] COND TRUE p->h != 2 [L549] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 39 SDslu, 46 SDs, 0 SdLazy, 59 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 59 NumberOfCodeBlocks, 59 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 6 NumberOfNonLiveVariables, 72 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 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...