/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/ms4f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:24:28,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:24:28,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:24:28,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:24:28,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:24:28,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:24:28,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:24:28,635 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:24:28,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:24:28,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:24:28,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:24:28,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:24:28,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:24:28,651 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:24:28,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:24:28,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:24:28,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:24:28,657 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:24:28,659 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:24:28,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:24:28,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:24:28,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:24:28,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:24:28,671 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:24:28,674 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 01:24:28,675 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 01:24:28,675 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 01:24:28,677 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 01:24:28,677 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 01:24:28,679 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 01:24:28,679 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 01:24:28,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 01:24:28,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 01:24:28,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 01:24:28,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 01:24:28,684 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 01:24:28,685 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 01:24:28,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 01:24:28,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:24:28,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:24:28,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:24:28,690 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 01:24:28,717 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:24:28,717 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:24:28,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:24:28,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:24:28,719 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:24:28,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:24:28,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:24:28,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:24:28,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:24:28,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:24:28,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:24:28,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:24:28,721 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:24:28,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:24:28,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:24:28,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:24:28,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:24:28,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:24:28,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:24:28,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:24:28,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:24:28,723 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:24:28,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:24:28,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:24:28,724 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:24:28,724 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:24:29,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:24:29,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:24:29,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:24:29,134 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:24:29,135 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:24:29,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ms4f.c [2020-12-23 01:24:29,231 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be1ecae67/2556018de8ff419db4929d7944de2ff5/FLAGf68d5279a [2020-12-23 01:24:29,842 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:24:29,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/ms4f.c [2020-12-23 01:24:29,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be1ecae67/2556018de8ff419db4929d7944de2ff5/FLAGf68d5279a [2020-12-23 01:24:30,224 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/be1ecae67/2556018de8ff419db4929d7944de2ff5 [2020-12-23 01:24:30,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:24:30,230 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:24:30,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:24:30,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:24:30,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:24:30,240 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fdb08ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30, skipping insertion in model container [2020-12-23 01:24:30,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,252 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:24:30,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 01:24:30,514 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/ms4f.c[587,600] 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],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]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~sum~0,],[IntegerLiteral[0]]] [2020-12-23 01:24:30,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:24:30,561 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 01:24:30,583 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/ms4f.c[587,600] 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],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]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#sum~0,],base],StructAccessExpression[IdentifierExpression[~#sum~0,],offset]]] [2020-12-23 01:24:30,607 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:24:30,631 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:24:30,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30 WrapperNode [2020-12-23 01:24:30,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:24:30,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:24:30,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:24:30,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:24:30,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,665 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:24:30,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:24:30,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:24:30,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:24:30,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,722 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,728 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (1/1) ... [2020-12-23 01:24:30,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:24:30,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:24:30,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:24:30,767 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:24:30,768 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (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 01:24:30,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 01:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 01:24:30,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:24:30,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:24:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 01:24:30,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 01:24:31,277 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:24:31,277 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 01:24:31,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:24:31 BoogieIcfgContainer [2020-12-23 01:24:31,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:24:31,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:24:31,281 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:24:31,284 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:24:31,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:24:30" (1/3) ... [2020-12-23 01:24:31,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ac1865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:24:31, skipping insertion in model container [2020-12-23 01:24:31,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:24:30" (2/3) ... [2020-12-23 01:24:31,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ac1865 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:24:31, skipping insertion in model container [2020-12-23 01:24:31,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:24:31" (3/3) ... [2020-12-23 01:24:31,288 INFO L111 eAbstractionObserver]: Analyzing ICFG ms4f.c [2020-12-23 01:24:31,296 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:24:31,301 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:24:31,322 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:24:31,431 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:24:31,431 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:24:31,432 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:24:31,432 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:24:31,432 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:24:31,432 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:24:31,433 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:24:31,433 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:24:31,452 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-12-23 01:24:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:24:31,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:24:31,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:24:31,465 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:24:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:24:31,479 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-12-23 01:24:31,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:24:31,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393004488] [2020-12-23 01:24:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:24:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:24:31,799 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 01:24:31,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393004488] [2020-12-23 01:24:31,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:24:31,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 01:24:31,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706571343] [2020-12-23 01:24:31,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 01:24:31,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:24:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 01:24:31,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 01:24:31,838 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-12-23 01:24:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:24:31,860 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2020-12-23 01:24:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 01:24:31,862 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-23 01:24:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:24:31,879 INFO L225 Difference]: With dead ends: 34 [2020-12-23 01:24:31,879 INFO L226 Difference]: Without dead ends: 15 [2020-12-23 01:24:31,883 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 01:24:31,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-23 01:24:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-23 01:24:31,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 01:24:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-23 01:24:31,923 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-12-23 01:24:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:24:31,923 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-23 01:24:31,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 01:24:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-23 01:24:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 01:24:31,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:24:31,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:24:31,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:24:31,927 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:24:31,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:24:31,932 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-12-23 01:24:31,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:24:31,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783332956] [2020-12-23 01:24:31,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:24:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:24:32,036 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 01:24:32,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783332956] [2020-12-23 01:24:32,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:24:32,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 01:24:32,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471231049] [2020-12-23 01:24:32,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 01:24:32,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:24:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 01:24:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 01:24:32,040 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-12-23 01:24:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:24:32,102 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-12-23 01:24:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 01:24:32,103 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 01:24:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:24:32,104 INFO L225 Difference]: With dead ends: 28 [2020-12-23 01:24:32,104 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 01:24:32,105 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 01:24:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 01:24:32,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-12-23 01:24:32,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 01:24:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-23 01:24:32,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-12-23 01:24:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:24:32,113 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-23 01:24:32,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 01:24:32,113 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-23 01:24:32,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 01:24:32,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:24:32,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:24:32,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:24:32,115 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:24:32,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:24:32,116 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-12-23 01:24:32,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:24:32,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83640236] [2020-12-23 01:24:32,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:24:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:24:32,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:24:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 01:24:32,201 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 01:24:32,229 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 01:24:32,229 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 01:24:32,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:24:32,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:24:32 BoogieIcfgContainer [2020-12-23 01:24:32,267 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:24:32,268 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:24:32,268 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:24:32,268 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:24:32,269 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:24:31" (3/4) ... [2020-12-23 01:24:32,271 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 01:24:32,374 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/ms4f.c-witness.graphml [2020-12-23 01:24:32,374 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:24:32,377 INFO L168 Benchmark]: Toolchain (without parser) took 2146.31 ms. Allocated memory is still 151.0 MB. Free memory was 127.1 MB in the beginning and 99.9 MB in the end (delta: 27.3 MB). Peak memory consumption was 27.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,378 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:24:32,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 401.10 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,379 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,380 INFO L168 Benchmark]: Boogie Preprocessor took 55.81 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,381 INFO L168 Benchmark]: RCFGBuilder took 512.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 99.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,382 INFO L168 Benchmark]: TraceAbstraction took 986.59 ms. Allocated memory is still 151.0 MB. Free memory was 98.9 MB in the beginning and 102.5 MB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:24:32,382 INFO L168 Benchmark]: Witness Printer took 106.91 ms. Allocated memory is still 151.0 MB. Free memory was 102.0 MB in the beginning and 99.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:24:32,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 401.10 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 116.9 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 75.03 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 55.81 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 114.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 512.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.0 MB in the beginning and 99.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 986.59 ms. Allocated memory is still 151.0 MB. Free memory was 98.9 MB in the beginning and 102.5 MB in the end (delta: -3.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 106.91 ms. Allocated memory is still 151.0 MB. Free memory was 102.0 MB in the beginning and 99.9 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: 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] i=0 VAL [N=1] [L31] COND TRUE i