/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/nsqm-iff.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:18:52,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:18:52,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:18:52,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:18:52,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:18:52,315 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:18:52,317 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:18:52,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:18:52,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:18:52,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:18:52,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:18:52,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:18:52,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:18:52,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:18:52,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:18:52,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:18:52,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:18:52,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:18:52,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:18:52,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:18:52,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:18:52,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:18:52,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:18:52,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:18:52,375 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:18:52,380 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 11:18:52,382 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 11:18:52,383 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 11:18:52,384 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 11:18:52,385 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 11:18:52,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 11:18:52,387 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 11:18:52,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 11:18:52,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:18:52,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:18:52,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:18:52,392 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 11:18:52,420 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:18:52,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:18:52,423 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:18:52,423 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:18:52,423 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:18:52,424 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:18:52,424 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:18:52,425 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:18:52,425 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:18:52,425 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:18:52,426 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:18:52,426 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:18:52,426 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:18:52,427 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:18:52,427 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:18:52,427 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:18:52,428 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:18:52,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:18:52,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:18:52,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:18:52,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:18:52,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:18:52,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:18:52,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:18:52,431 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:18:52,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:18:52,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:18:52,912 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:18:52,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:18:52,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:18:52,920 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:18:52,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-01-06 11:18:53,039 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf7ba7cf4/fbbb36df19784775a33853ea1af68128/FLAGdbe909d5e [2021-01-06 11:18:53,657 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:18:53,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-fpi/nsqm-iff.c [2021-01-06 11:18:53,666 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf7ba7cf4/fbbb36df19784775a33853ea1af68128/FLAGdbe909d5e [2021-01-06 11:18:54,022 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cf7ba7cf4/fbbb36df19784775a33853ea1af68128 [2021-01-06 11:18:54,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:18:54,031 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:18:54,033 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:18:54,033 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:18:54,037 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:18:54,038 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@899d971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54, skipping insertion in model container [2021-01-06 11:18:54,040 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:18:54,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:18:54,236 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/nsqm-iff.c[591,604] 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[~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,] 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,] [2021-01-06 11:18:54,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:18:54,275 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:18:54,291 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/nsqm-iff.c[591,604] 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[~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,] 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,] [2021-01-06 11:18:54,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:18:54,322 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:18:54,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54 WrapperNode [2021-01-06 11:18:54,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:18:54,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:18:54,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:18:54,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:18:54,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,371 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:18:54,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:18:54,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:18:54,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:18:54,385 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,396 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (1/1) ... [2021-01-06 11:18:54,406 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:18:54,407 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:18:54,408 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:18:54,408 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:18:54,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (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 11:18:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:18:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:18:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:18:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 11:18:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:18:54,532 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:18:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:18:54,978 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:18:54,978 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 11:18:54,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:18:54 BoogieIcfgContainer [2021-01-06 11:18:54,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:18:54,983 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:18:54,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:18:54,988 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:18:54,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:18:54" (1/3) ... [2021-01-06 11:18:54,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d414187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:18:54, skipping insertion in model container [2021-01-06 11:18:54,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:18:54" (2/3) ... [2021-01-06 11:18:54,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d414187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:18:54, skipping insertion in model container [2021-01-06 11:18:54,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:18:54" (3/3) ... [2021-01-06 11:18:54,993 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-iff.c [2021-01-06 11:18:55,001 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:18:55,007 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:18:55,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:18:55,072 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:18:55,073 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:18:55,073 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:18:55,073 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:18:55,073 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:18:55,074 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:18:55,074 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:18:55,074 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:18:55,095 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 11:18:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:18:55,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:18:55,104 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:18:55,105 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:18:55,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:18:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2021-01-06 11:18:55,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:18:55,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13824246] [2021-01-06 11:18:55,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:18:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:18:55,312 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 11:18:55,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13824246] [2021-01-06 11:18:55,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:18:55,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:18:55,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110365872] [2021-01-06 11:18:55,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:18:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:18:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:18:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:18:55,340 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2021-01-06 11:18:55,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:18:55,361 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2021-01-06 11:18:55,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:18:55,363 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2021-01-06 11:18:55,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:18:55,373 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:18:55,373 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 11:18:55,377 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 11:18:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 11:18:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-01-06 11:18:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 11:18:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 11:18:55,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2021-01-06 11:18:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:18:55,417 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 11:18:55,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:18:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 11:18:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:18:55,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:18:55,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:18:55,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:18:55,419 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:18:55,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:18:55,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2021-01-06 11:18:55,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:18:55,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850470975] [2021-01-06 11:18:55,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:18:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:18:55,555 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 11:18:55,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850470975] [2021-01-06 11:18:55,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:18:55,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:18:55,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722489828] [2021-01-06 11:18:55,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:18:55,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:18:55,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:18:55,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:18:55,561 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2021-01-06 11:18:55,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:18:55,685 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2021-01-06 11:18:55,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:18:55,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2021-01-06 11:18:55,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:18:55,688 INFO L225 Difference]: With dead ends: 45 [2021-01-06 11:18:55,688 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 11:18:55,689 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 11:18:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 11:18:55,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-01-06 11:18:55,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:18:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-01-06 11:18:55,696 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-01-06 11:18:55,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:18:55,697 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-01-06 11:18:55,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:18:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-01-06 11:18:55,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:18:55,698 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:18:55,699 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 11:18:55,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:18:55,699 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:18:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:18:55,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2021-01-06 11:18:55,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:18:55,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649388733] [2021-01-06 11:18:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:18:55,730 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 11:18:55,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526151800] [2021-01-06 11:18:55,730 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 11:18:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:18:55,869 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:18:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-06 11:18:55,907 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-06 11:18:55,986 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-06 11:18:55,986 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-06 11:18:56,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:18:56,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:18:56 BoogieIcfgContainer [2021-01-06 11:18:56,283 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:18:56,285 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:18:56,286 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:18:56,287 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:18:56,291 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:18:54" (3/4) ... [2021-01-06 11:18:56,295 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-06 11:18:56,393 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/array-fpi/nsqm-iff.c-witness.graphml [2021-01-06 11:18:56,393 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:18:56,395 INFO L168 Benchmark]: Toolchain (without parser) took 2363.94 ms. Allocated memory is still 156.2 MB. Free memory was 131.8 MB in the beginning and 87.1 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,396 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:18:56,396 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.50 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 121.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,397 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 119.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,398 INFO L168 Benchmark]: Boogie Preprocessor took 33.97 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 118.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,398 INFO L168 Benchmark]: RCFGBuilder took 573.43 ms. Allocated memory is still 156.2 MB. Free memory was 118.6 MB in the beginning and 135.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,399 INFO L168 Benchmark]: TraceAbstraction took 1300.77 ms. Allocated memory is still 156.2 MB. Free memory was 134.7 MB in the beginning and 90.7 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,400 INFO L168 Benchmark]: Witness Printer took 107.93 ms. Allocated memory is still 156.2 MB. Free memory was 90.3 MB in the beginning and 87.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:18:56,403 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 156.2 MB. Free memory is still 129.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 290.50 ms. Allocated memory is still 156.2 MB. Free memory was 131.6 MB in the beginning and 121.5 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 47.45 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 119.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.97 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 118.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 573.43 ms. Allocated memory is still 156.2 MB. Free memory was 118.6 MB in the beginning and 135.2 MB in the end (delta: -16.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1300.77 ms. Allocated memory is still 156.2 MB. Free memory was 134.7 MB in the beginning and 90.7 MB in the end (delta: 44.0 MB). Peak memory consumption was 44.0 MB. Max. memory is 8.0 GB. * Witness Printer took 107.93 ms. Allocated memory is still 156.2 MB. Free memory was 90.3 MB in the beginning and 87.1 MB in the end (delta: 3.1 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