/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/s4liff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:30:52,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:30:52,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:30:52,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:30:52,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:30:52,936 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:30:52,939 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:30:52,943 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:30:52,946 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:30:52,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:30:52,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:30:52,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:30:52,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:30:52,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:30:52,957 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:30:52,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:30:52,980 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:30:52,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:30:52,985 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:30:52,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:30:52,992 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:30:52,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:30:52,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:30:52,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:30:53,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:30:53,018 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:30:53,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:30:53,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:30:53,023 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:30:53,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:30:53,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:30:53,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:30:53,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:30:53,062 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:30:53,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:30:53,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:30:53,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:30:53,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:30:53,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:30:53,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:30:53,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:30:53,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:30:53,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:30:53,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:30:53,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:30:53,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:30:53,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:30:53,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:30:53,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:30:53,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:30:53,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:30:53,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:30:53,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:30:53,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:30:53,067 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:30:53,599 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:30:53,639 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:30:53,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:30:53,647 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:30:53,648 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:30:53,650 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s4liff.c [2020-12-23 01:30:53,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1580919c/8e9017f291dd477dbee100216a38b58e/FLAG88a9e871b [2020-12-23 01:30:54,792 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:30:54,793 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/s4liff.c [2020-12-23 01:30:54,806 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1580919c/8e9017f291dd477dbee100216a38b58e/FLAG88a9e871b [2020-12-23 01:30:54,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1580919c/8e9017f291dd477dbee100216a38b58e [2020-12-23 01:30:54,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:30:54,837 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:30:54,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:30:54,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:30:54,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:30:54,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:30:54" (1/1) ... [2020-12-23 01:30:54,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45004fcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:54, skipping insertion in model container [2020-12-23 01:30:54,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:30:54" (1/1) ... [2020-12-23 01:30:54,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:30:54,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:30:55,084 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/s4liff.c[589,602] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] 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],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] 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[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2020-12-23 01:30:55,119 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:30:55,132 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:30:55,150 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/s4liff.c[589,602] left hand side expression in assignment: lhs: VariableLHS[~N~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] 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],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],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[~a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] 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[4],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[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2020-12-23 01:30:55,166 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:30:55,188 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:30:55,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55 WrapperNode [2020-12-23 01:30:55,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:30:55,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:30:55,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:30:55,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:30:55,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,246 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:30:55,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:30:55,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:30:55,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:30:55,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,265 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,283 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,286 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... [2020-12-23 01:30:55,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:30:55,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:30:55,291 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:30:55,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:30:55,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:30:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:30:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:30:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:30:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:30:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:30:55,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:30:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:30:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:30:55,993 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:30:55,993 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 01:30:55,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:30:55 BoogieIcfgContainer [2020-12-23 01:30:55,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:30:55,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:30:55,999 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:30:56,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:30:56,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:30:54" (1/3) ... [2020-12-23 01:30:56,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15236ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:30:56, skipping insertion in model container [2020-12-23 01:30:56,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:30:55" (2/3) ... [2020-12-23 01:30:56,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15236ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:30:56, skipping insertion in model container [2020-12-23 01:30:56,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:30:55" (3/3) ... [2020-12-23 01:30:56,011 INFO L111 eAbstractionObserver]: Analyzing ICFG s4liff.c [2020-12-23 01:30:56,024 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:30:56,041 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:30:56,109 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:30:56,161 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:30:56,162 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:30:56,162 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:30:56,162 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:30:56,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:30:56,163 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:30:56,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:30:56,163 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:30:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 01:30:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:30:56,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:56,207 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:56,208 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:56,220 INFO L82 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2020-12-23 01:30:56,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:56,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95609115] [2020-12-23 01:30:56,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:56,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95609115] [2020-12-23 01:30:56,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:30:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:30:56,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347806663] [2020-12-23 01:30:56,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:30:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:56,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:30:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:30:56,502 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-12-23 01:30:56,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:56,526 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2020-12-23 01:30:56,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:30:56,528 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-12-23 01:30:56,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:56,543 INFO L225 Difference]: With dead ends: 40 [2020-12-23 01:30:56,543 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 01:30:56,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:30:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 01:30:56,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-23 01:30:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:30:56,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-12-23 01:30:56,609 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2020-12-23 01:30:56,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:56,610 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-12-23 01:30:56,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:30:56,610 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-12-23 01:30:56,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 01:30:56,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:56,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:56,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:30:56,612 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:56,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:56,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2020-12-23 01:30:56,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:56,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269575701] [2020-12-23 01:30:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:30:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:30:56,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269575701] [2020-12-23 01:30:56,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:30:56,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:30:56,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794222785] [2020-12-23 01:30:56,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:30:56,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:30:56,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:30:56,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:30:56,744 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-12-23 01:30:56,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:30:56,836 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-12-23 01:30:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:30:56,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 01:30:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:30:56,838 INFO L225 Difference]: With dead ends: 36 [2020-12-23 01:30:56,838 INFO L226 Difference]: Without dead ends: 25 [2020-12-23 01:30:56,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:30:56,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-23 01:30:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2020-12-23 01:30:56,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 01:30:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-12-23 01:30:56,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-12-23 01:30:56,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:30:56,849 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-12-23 01:30:56,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:30:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-12-23 01:30:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 01:30:56,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:30:56,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:30:56,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:30:56,851 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:30:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:30:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2020-12-23 01:30:56,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:30:56,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278568602] [2020-12-23 01:30:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:30:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:30:56,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:30:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:30:56,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:30:57,055 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:30:57,056 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:30:57,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:30:57,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:30:57 BoogieIcfgContainer [2020-12-23 01:30:57,168 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:30:57,171 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:30:57,172 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:30:57,172 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:30:57,173 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:30:55" (3/4) ... [2020-12-23 01:30:57,177 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 01:30:57,305 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/s4liff.c-witness.graphml [2020-12-23 01:30:57,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:30:57,312 INFO L168 Benchmark]: Toolchain (without parser) took 2471.42 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 91.0 MB in the end (delta: 36.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,316 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:30:57,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.64 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 116.7 MB in the end (delta: 10.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,322 INFO L168 Benchmark]: Boogie Preprocessor took 41.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,323 INFO L168 Benchmark]: RCFGBuilder took 705.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 130.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,324 INFO L168 Benchmark]: TraceAbstraction took 1171.49 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 93.6 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,326 INFO L168 Benchmark]: Witness Printer took 134.92 ms. Allocated memory is still 151.0 MB. Free memory was 93.6 MB in the beginning and 91.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:30:57,332 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 151.0 MB. Free memory is still 123.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.64 ms. Allocated memory is still 151.0 MB. Free memory was 126.8 MB in the beginning and 116.7 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 55.93 ms. Allocated memory is still 151.0 MB. Free memory was 116.6 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.76 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 705.30 ms. Allocated memory is still 151.0 MB. Free memory was 113.6 MB in the beginning and 130.8 MB in the end (delta: -17.2 MB). Peak memory consumption was 16.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1171.49 ms. Allocated memory is still 151.0 MB. Free memory was 130.3 MB in the beginning and 93.6 MB in the end (delta: 36.7 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Witness Printer took 134.92 ms. Allocated memory is still 151.0 MB. Free memory was 93.6 MB in the beginning and 91.0 MB in the end (delta: 2.6 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: 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 sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = N [L32] i=0 VAL [N=1] [L32] COND TRUE i