/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/array-fpi/ifeqn2f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:13:34,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:13:34,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:13:34,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:13:34,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:13:34,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:13:34,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:13:34,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:13:34,221 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:13:34,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:13:34,236 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:13:34,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:13:34,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:13:34,245 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:13:34,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:13:34,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:13:34,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:13:34,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:13:34,289 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:13:34,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:13:34,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:13:34,307 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:13:34,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:13:34,316 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:13:34,333 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:13:34,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:13:34,369 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:13:34,371 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:13:34,373 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 11:13:34,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:13:34,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:13:34,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:13:34,450 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:13:34,450 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:13:34,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:13:34,451 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:13:34,451 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:13:34,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:13:34,452 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:13:34,452 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:13:34,452 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:13:34,453 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:13:34,453 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:13:34,453 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:13:34,453 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:13:34,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:13:34,454 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:13:34,454 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:13:34,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:13:34,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:13:34,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:13:34,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:13:34,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:13:34,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:13:34,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:13:35,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:13:35,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:13:35,165 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:13:35,167 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:13:35,169 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:13:35,171 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn2f.c [2021-01-06 11:13:35,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0acdb7c3c/7a7589ddacb04dccbfc89cee54cf192b/FLAGb2fde1312 [2021-01-06 11:13:36,362 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:13:36,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn2f.c [2021-01-06 11:13:36,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0acdb7c3c/7a7589ddacb04dccbfc89cee54cf192b/FLAGb2fde1312 [2021-01-06 11:13:36,614 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0acdb7c3c/7a7589ddacb04dccbfc89cee54cf192b [2021-01-06 11:13:36,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:13:36,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:13:36,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:13:36,626 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:13:36,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:13:36,636 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:13:36" (1/1) ... [2021-01-06 11:13:36,639 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b7a7b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:36, skipping insertion in model container [2021-01-06 11:13:36,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:13:36" (1/1) ... [2021-01-06 11:13:36,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:13:36,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:13:36,906 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/array-fpi/ifeqn2f.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] 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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:13:36,963 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:13:36,980 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:13:36,996 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/array-fpi/ifeqn2f.c[590,603] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~i~0,] 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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],StructAccessExpression[IdentifierExpression[~b~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:13:37,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:13:37,036 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:13:37,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37 WrapperNode [2021-01-06 11:13:37,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:13:37,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:13:37,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:13:37,041 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:13:37,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:13:37,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:13:37,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:13:37,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:13:37,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,146 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (1/1) ... [2021-01-06 11:13:37,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:13:37,152 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:13:37,152 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:13:37,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:13:37,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (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 11:13:37,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:13:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:13:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:13:37,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:13:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:13:37,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:13:37,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:13:37,962 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:13:37,963 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 11:13:37,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:13:37 BoogieIcfgContainer [2021-01-06 11:13:37,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:13:37,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:13:37,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:13:37,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:13:37,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:13:36" (1/3) ... [2021-01-06 11:13:37,983 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c291c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:13:37, skipping insertion in model container [2021-01-06 11:13:37,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:13:37" (2/3) ... [2021-01-06 11:13:37,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c291c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:13:37, skipping insertion in model container [2021-01-06 11:13:37,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:13:37" (3/3) ... [2021-01-06 11:13:37,989 INFO L111 eAbstractionObserver]: Analyzing ICFG ifeqn2f.c [2021-01-06 11:13:38,004 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:13:38,015 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:13:38,076 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:13:38,143 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:13:38,144 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:13:38,144 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:13:38,144 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:13:38,144 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:13:38,145 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:13:38,145 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:13:38,145 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:13:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 11:13:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:13:38,190 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:38,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:38,193 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:38,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:38,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-01-06 11:13:38,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:38,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191699336] [2021-01-06 11:13:38,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:13:38,643 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 11:13:38,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191699336] [2021-01-06 11:13:38,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:13:38,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:13:38,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918717036] [2021-01-06 11:13:38,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:13:38,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:38,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:13:38,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:13:38,704 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 11:13:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:38,741 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-01-06 11:13:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:13:38,743 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 11:13:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:38,760 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:13:38,761 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 11:13:38,767 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 11:13:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 11:13:38,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 11:13:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:13:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 11:13:38,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-01-06 11:13:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:38,830 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 11:13:38,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:13:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 11:13:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:13:38,831 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:38,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:38,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:13:38,832 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:38,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:38,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-01-06 11:13:38,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:38,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630083567] [2021-01-06 11:13:38,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:38,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:13:38,988 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 11:13:38,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630083567] [2021-01-06 11:13:38,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:13:38,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:13:38,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710022355] [2021-01-06 11:13:38,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:13:38,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:13:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:13:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:13:38,997 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2021-01-06 11:13:39,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:13:39,127 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-01-06 11:13:39,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:13:39,128 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 11:13:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:13:39,130 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:13:39,131 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 11:13:39,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:13:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 11:13:39,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-01-06 11:13:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:13:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 11:13:39,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-01-06 11:13:39,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:13:39,143 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 11:13:39,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:13:39,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 11:13:39,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:13:39,145 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:13:39,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:13:39,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:13:39,146 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:13:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:13:39,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-01-06 11:13:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:13:39,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258101618] [2021-01-06 11:13:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:13:39,213 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:13:39,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8213218] [2021-01-06 11:13:39,220 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 11:13:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:13:39,368 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:13:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:13:39,413 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:13:39,502 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:13:39,503 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:13:39,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:13:39,853 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:13:39 BoogieIcfgContainer [2021-01-06 11:13:39,854 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:13:39,859 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:13:39,859 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:13:39,861 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:13:39,866 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:13:37" (3/4) ... [2021-01-06 11:13:39,871 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 11:13:40,008 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ifeqn2f.c-witness.graphml [2021-01-06 11:13:40,008 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:13:40,014 INFO L168 Benchmark]: Toolchain (without parser) took 3388.65 ms. Allocated memory is still 152.0 MB. Free memory was 127.6 MB in the beginning and 83.7 MB in the end (delta: 43.9 MB). Peak memory consumption was 43.8 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,016 INFO L168 Benchmark]: CDTParser took 0.67 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:13:40,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 413.71 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 117.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,025 INFO L168 Benchmark]: Boogie Preprocessor took 47.98 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,026 INFO L168 Benchmark]: RCFGBuilder took 816.40 ms. Allocated memory is still 152.0 MB. Free memory was 114.4 MB in the beginning and 131.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,026 INFO L168 Benchmark]: TraceAbstraction took 1882.29 ms. Allocated memory is still 152.0 MB. Free memory was 130.9 MB in the beginning and 86.3 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,027 INFO L168 Benchmark]: Witness Printer took 149.82 ms. Allocated memory is still 152.0 MB. Free memory was 86.3 MB in the beginning and 83.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:13:40,042 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.67 ms. Allocated memory is still 152.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 413.71 ms. Allocated memory is still 152.0 MB. Free memory was 127.2 MB in the beginning and 117.2 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 61.35 ms. Allocated memory is still 152.0 MB. Free memory was 117.1 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.98 ms. Allocated memory is still 152.0 MB. Free memory was 115.6 MB in the beginning and 114.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 816.40 ms. Allocated memory is still 152.0 MB. Free memory was 114.4 MB in the beginning and 131.4 MB in the end (delta: -17.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1882.29 ms. Allocated memory is still 152.0 MB. Free memory was 130.9 MB in the beginning and 86.3 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * Witness Printer took 149.82 ms. Allocated memory is still 152.0 MB. Free memory was 86.3 MB in the beginning and 83.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i