/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:49:15,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:49:15,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:49:15,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:49:15,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:49:15,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:49:15,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:49:15,394 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:49:15,396 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:49:15,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:49:15,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:49:15,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:49:15,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:49:15,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:49:15,403 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:49:15,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:49:15,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:49:15,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:49:15,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:49:15,418 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:49:15,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:49:15,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:49:15,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:49:15,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:49:15,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:49:15,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:49:15,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:49:15,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:49:15,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:49:15,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:49:15,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:49:15,458 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:49:15,458 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:49:15,459 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:49:15,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:49:15,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:49:15,463 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:49:15,499 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:49:15,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:49:15,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:49:15,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:49:15,502 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:49:15,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:49:15,502 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:49:15,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:49:15,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:49:15,503 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:49:15,503 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:49:15,503 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:49:15,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:49:15,504 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:49:15,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:49:15,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:49:15,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:49:15,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:49:15,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:49:15,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:49:15,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:49:15,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:49:15,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:49:15,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:49:15,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:49:15,877 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:49:15,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:49:15,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:49:15,913 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:49:15,914 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:49:15,915 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2020-12-23 16:49:15,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25b2f1825/70e620e9378a461a93631b0f74f8d326/FLAG0d0eb4398 [2020-12-23 16:49:16,744 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:49:16,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2020-12-23 16:49:16,760 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25b2f1825/70e620e9378a461a93631b0f74f8d326/FLAG0d0eb4398 [2020-12-23 16:49:17,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/25b2f1825/70e620e9378a461a93631b0f74f8d326 [2020-12-23 16:49:17,072 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:49:17,074 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:49:17,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:17,078 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:49:17,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:49:17,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52a87251 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17, skipping insertion in model container [2020-12-23 16:49:17,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:49:17,167 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~fac~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~arr~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~arr~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~arr2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~arr2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] [2020-12-23 16:49:17,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:17,520 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~fac~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~arr~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~arr~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~arr2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~arr2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~0,]]]]] [2020-12-23 16:49:17,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:49:17,679 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:49:17,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17 WrapperNode [2020-12-23 16:49:17,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:49:17,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:17,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:49:17,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:49:17,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,709 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:49:17,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:49:17,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:49:17,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:49:17,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (1/1) ... [2020-12-23 16:49:17,790 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:49:17,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:49:17,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:49:17,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:49:17,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (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 16:49:17,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:49:17,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:49:17,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:49:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:49:17,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:49:17,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:49:18,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:49:18,408 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 16:49:18,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:18 BoogieIcfgContainer [2020-12-23 16:49:18,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:49:18,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:49:18,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:49:18,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:49:18,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:49:17" (1/3) ... [2020-12-23 16:49:18,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396caee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:18, skipping insertion in model container [2020-12-23 16:49:18,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:49:17" (2/3) ... [2020-12-23 16:49:18,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396caee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:49:18, skipping insertion in model container [2020-12-23 16:49:18,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:18" (3/3) ... [2020-12-23 16:49:18,430 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array-alloca-1.i [2020-12-23 16:49:18,437 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:49:18,443 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2020-12-23 16:49:18,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-12-23 16:49:18,503 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:49:18,503 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:49:18,504 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:49:18,504 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:49:18,504 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:49:18,504 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:49:18,506 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:49:18,506 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:49:18,523 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-12-23 16:49:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:49:18,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:18,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:18,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:18,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash 119383862, now seen corresponding path program 1 times [2020-12-23 16:49:18,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:18,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494752363] [2020-12-23 16:49:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:18,666 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:18,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423221245] [2020-12-23 16:49:18,667 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 [2020-12-23 16:49:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:18,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 16:49:18,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:18,905 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 16:49:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494752363] [2020-12-23 16:49:18,906 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:18,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423221245] [2020-12-23 16:49:18,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:18,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:49:18,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563760505] [2020-12-23 16:49:18,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:49:18,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:18,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:49:18,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:49:18,932 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-12-23 16:49:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:19,008 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 16:49:19,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:49:19,011 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:49:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:19,020 INFO L225 Difference]: With dead ends: 28 [2020-12-23 16:49:19,021 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 16:49:19,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 16:49:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-23 16:49:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:49:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 16:49:19,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2020-12-23 16:49:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:19,071 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 16:49:19,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:49:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 16:49:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:49:19,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:19,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:19,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 16:49:19,288 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:19,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:19,289 INFO L82 PathProgramCache]: Analyzing trace with hash -594066643, now seen corresponding path program 1 times [2020-12-23 16:49:19,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:19,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147078896] [2020-12-23 16:49:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:19,303 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:19,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165623210] [2020-12-23 16:49:19,304 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:19,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:49:19,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:19,465 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_10|], 1=[|v_#valid_21|]} [2020-12-23 16:49:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:19,498 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-12-23 16:49:19,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:19,531 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:19,550 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:49:19,555 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:19,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:19,649 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:19,649 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:35 [2020-12-23 16:49:19,854 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 16:49:19,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147078896] [2020-12-23 16:49:19,854 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165623210] [2020-12-23 16:49:19,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112234198] [2020-12-23 16:49:19,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:19,858 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-12-23 16:49:22,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:22,142 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2020-12-23 16:49:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:22,143 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:49:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:22,145 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:49:22,145 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:49:22,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:49:22,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2020-12-23 16:49:22,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 16:49:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-23 16:49:22,152 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2020-12-23 16:49:22,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:22,153 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-23 16:49:22,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:22,153 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-23 16:49:22,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:49:22,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:22,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:22,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:22,368 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:22,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash -594066644, now seen corresponding path program 1 times [2020-12-23 16:49:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:22,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957319160] [2020-12-23 16:49:22,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:22,384 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:22,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324430074] [2020-12-23 16:49:22,385 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:22,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:49:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:22,524 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 16:49:22,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:49:22,527 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:22,536 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:22,538 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:22,539 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-23 16:49:22,558 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 16:49:22,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957319160] [2020-12-23 16:49:22,559 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:22,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324430074] [2020-12-23 16:49:22,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:22,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:49:22,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010529701] [2020-12-23 16:49:22,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:49:22,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:22,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:49:22,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:22,562 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2020-12-23 16:49:22,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:22,598 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-12-23 16:49:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:49:22,599 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 16:49:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:22,600 INFO L225 Difference]: With dead ends: 28 [2020-12-23 16:49:22,601 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:49:22,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:22,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:49:22,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 16:49:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:49:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-12-23 16:49:22,605 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 9 [2020-12-23 16:49:22,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:22,606 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-12-23 16:49:22,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:49:22,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-12-23 16:49:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:49:22,607 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:22,607 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:22,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:22,824 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:22,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:22,826 INFO L82 PathProgramCache]: Analyzing trace with hash -592219601, now seen corresponding path program 1 times [2020-12-23 16:49:22,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:22,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912686055] [2020-12-23 16:49:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:22,837 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735305370] [2020-12-23 16:49:22,838 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:22,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:22,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:49:22,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:23,004 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_11|], 1=[|v_#valid_23|]} [2020-12-23 16:49:23,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:23,017 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-12-23 16:49:23,023 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:23,048 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:23,060 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:49:23,066 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:23,087 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:23,126 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:23,129 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:35 [2020-12-23 16:49:23,255 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 16:49:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912686055] [2020-12-23 16:49:23,256 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:23,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735305370] [2020-12-23 16:49:23,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:23,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:23,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90908508] [2020-12-23 16:49:23,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:23,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:23,258 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2020-12-23 16:49:25,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:25,414 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-12-23 16:49:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:25,414 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:49:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:25,415 INFO L225 Difference]: With dead ends: 32 [2020-12-23 16:49:25,415 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 16:49:25,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 16:49:25,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2020-12-23 16:49:25,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 16:49:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-12-23 16:49:25,420 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 9 [2020-12-23 16:49:25,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:25,420 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-12-23 16:49:25,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-12-23 16:49:25,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:49:25,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:25,422 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:25,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:25,629 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:25,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:25,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1806384368, now seen corresponding path program 1 times [2020-12-23 16:49:25,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:25,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792462748] [2020-12-23 16:49:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:25,643 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:25,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33143696] [2020-12-23 16:49:25,644 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:25,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:49:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792462748] [2020-12-23 16:49:25,751 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:25,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33143696] [2020-12-23 16:49:25,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:25,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:49:25,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932978167] [2020-12-23 16:49:25,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:25,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:25,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:25,754 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-12-23 16:49:29,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:29,876 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2020-12-23 16:49:29,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:29,877 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-23 16:49:29,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:29,878 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:49:29,878 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 16:49:29,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 16:49:29,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-12-23 16:49:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 16:49:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-12-23 16:49:29,883 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2020-12-23 16:49:29,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:29,884 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-12-23 16:49:29,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:29,884 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-12-23 16:49:29,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:49:29,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:29,885 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:30,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:30,101 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:30,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:30,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1787518350, now seen corresponding path program 1 times [2020-12-23 16:49:30,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:30,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110659911] [2020-12-23 16:49:30,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:30,118 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:30,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842259264] [2020-12-23 16:49:30,120 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:49:30,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:30,208 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2020-12-23 16:49:30,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:49:30,215 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2020-12-23 16:49:30,220 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:30,233 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:30,242 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:49:30,245 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:30,257 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:30,262 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:30,262 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:24 [2020-12-23 16:49:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:30,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110659911] [2020-12-23 16:49:30,494 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:30,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842259264] [2020-12-23 16:49:30,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:49:30,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 16:49:30,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703300255] [2020-12-23 16:49:30,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:49:30,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:49:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:49:30,497 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-12-23 16:49:31,238 WARN L197 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2020-12-23 16:49:33,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:33,292 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-23 16:49:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:49:33,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-23 16:49:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:33,293 INFO L225 Difference]: With dead ends: 36 [2020-12-23 16:49:33,293 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 16:49:33,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 16:49:33,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-12-23 16:49:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 16:49:33,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-12-23 16:49:33,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2020-12-23 16:49:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:33,299 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-12-23 16:49:33,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:49:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-12-23 16:49:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:33,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:33,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:33,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:33,512 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:33,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:33,513 INFO L82 PathProgramCache]: Analyzing trace with hash 768538716, now seen corresponding path program 1 times [2020-12-23 16:49:33,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:33,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117114491] [2020-12-23 16:49:33,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:33,533 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:33,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809942614] [2020-12-23 16:49:33,534 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:49:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:33,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117114491] [2020-12-23 16:49:33,677 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:33,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809942614] [2020-12-23 16:49:33,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:33,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:49:33,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390158248] [2020-12-23 16:49:33,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:49:33,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:33,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:49:33,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:33,680 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-12-23 16:49:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:33,761 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-12-23 16:49:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:49:33,762 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 16:49:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:33,763 INFO L225 Difference]: With dead ends: 44 [2020-12-23 16:49:33,763 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 16:49:33,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:49:33,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 16:49:33,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2020-12-23 16:49:33,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 16:49:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2020-12-23 16:49:33,769 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 15 [2020-12-23 16:49:33,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:33,769 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2020-12-23 16:49:33,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:49:33,769 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2020-12-23 16:49:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:33,770 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:33,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:33,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:33,972 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:33,973 INFO L82 PathProgramCache]: Analyzing trace with hash 181732702, now seen corresponding path program 1 times [2020-12-23 16:49:33,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:33,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113405441] [2020-12-23 16:49:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:33,981 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:33,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613843988] [2020-12-23 16:49:33,981 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:34,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:34,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:49:34,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113405441] [2020-12-23 16:49:34,144 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:34,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613843988] [2020-12-23 16:49:34,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:34,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:49:34,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934659811] [2020-12-23 16:49:34,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:49:34,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:34,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:49:34,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:49:34,146 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2020-12-23 16:49:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:38,303 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2020-12-23 16:49:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:49:38,304 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 16:49:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:38,306 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:49:38,306 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:49:38,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:38,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:49:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-12-23 16:49:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:49:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2020-12-23 16:49:38,312 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2020-12-23 16:49:38,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:38,312 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2020-12-23 16:49:38,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:49:38,313 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2020-12-23 16:49:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:49:38,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:38,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:38,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 16:49:38,515 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:38,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:38,516 INFO L82 PathProgramCache]: Analyzing trace with hash 882797280, now seen corresponding path program 1 times [2020-12-23 16:49:38,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:38,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822097001] [2020-12-23 16:49:38,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:38,524 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:38,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581573234] [2020-12-23 16:49:38,524 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:38,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:49:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:49:38,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822097001] [2020-12-23 16:49:38,683 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:38,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581573234] [2020-12-23 16:49:38,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:38,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:49:38,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454999678] [2020-12-23 16:49:38,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:49:38,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:38,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:49:38,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:49:38,695 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 8 states. [2020-12-23 16:49:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:40,814 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-12-23 16:49:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:49:40,816 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-23 16:49:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:40,817 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:49:40,817 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:49:40,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:49:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:49:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2020-12-23 16:49:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-23 16:49:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-23 16:49:40,822 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2020-12-23 16:49:40,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:40,822 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-23 16:49:40,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:49:40,822 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-23 16:49:40,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:49:40,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:40,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:41,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,032 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1945105130, now seen corresponding path program 1 times [2020-12-23 16:49:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:41,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984213436] [2020-12-23 16:49:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:41,042 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:41,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394052469] [2020-12-23 16:49:41,042 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:49:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:41,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984213436] [2020-12-23 16:49:41,151 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:41,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394052469] [2020-12-23 16:49:41,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:41,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:49:41,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099475631] [2020-12-23 16:49:41,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:49:41,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:41,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:49:41,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:41,155 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-12-23 16:49:41,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:41,209 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-12-23 16:49:41,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:49:41,210 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 16:49:41,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:41,210 INFO L225 Difference]: With dead ends: 31 [2020-12-23 16:49:41,211 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 16:49:41,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:49:41,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 16:49:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 16:49:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 16:49:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-12-23 16:49:41,219 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2020-12-23 16:49:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:41,219 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-12-23 16:49:41,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:49:41,219 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-12-23 16:49:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:49:41,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:41,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:41,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,434 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1945103590, now seen corresponding path program 1 times [2020-12-23 16:49:41,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:41,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592337420] [2020-12-23 16:49:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:41,443 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:41,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421424820] [2020-12-23 16:49:41,444 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:49:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:41,524 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 16:49:41,525 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:49:41,527 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:41,533 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:41,535 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:49:41,535 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-12-23 16:49:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:49:41,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592337420] [2020-12-23 16:49:41,552 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:41,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421424820] [2020-12-23 16:49:41,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:41,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:49:41,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262899717] [2020-12-23 16:49:41,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:49:41,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:49:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:49:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:41,554 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-12-23 16:49:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:49:41,566 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-12-23 16:49:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:49:41,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-12-23 16:49:41,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:49:41,568 INFO L225 Difference]: With dead ends: 28 [2020-12-23 16:49:41,568 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 16:49:41,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:49:41,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 16:49:41,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-23 16:49:41,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 16:49:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-12-23 16:49:41,571 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-12-23 16:49:41,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:49:41,572 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-12-23 16:49:41,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:49:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-12-23 16:49:41,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:49:41,573 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:49:41,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:49:41,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 16:49:41,778 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-12-23 16:49:41,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:49:41,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1945103589, now seen corresponding path program 1 times [2020-12-23 16:49:41,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:49:41,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127323501] [2020-12-23 16:49:41,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:49:41,799 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 16:49:41,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959419102] [2020-12-23 16:49:41,799 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:49:41,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:49:41,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:49:41,886 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:49:41,887 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 35 [2020-12-23 16:49:41,889 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:49:41,920 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2020-12-23 16:49:41,923 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:49:41,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:13 [2020-12-23 16:49:41,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127323501] [2020-12-23 16:49:41,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 16:49:41,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959419102] [2020-12-23 16:49:41,965 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2020-12-23 16:49:41,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:49:41,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-12-23 16:49:41,966 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2020-12-23 16:49:41,966 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 16:49:42,183 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:49:42,200 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-12-23 16:49:42,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:49:42 BoogieIcfgContainer [2020-12-23 16:49:42,201 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:49:42,201 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:49:42,202 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:49:42,202 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:49:42,202 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:49:18" (3/4) ... [2020-12-23 16:49:42,206 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 16:49:42,206 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:49:42,208 INFO L168 Benchmark]: Toolchain (without parser) took 25133.66 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 124.4 MB in the beginning and 87.1 MB in the end (delta: 37.2 MB). Peak memory consumption was 68.9 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,208 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:49:42,209 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.95 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 103.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,209 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.17 ms. Allocated memory is still 151.0 MB. Free memory was 103.8 MB in the beginning and 102.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,210 INFO L168 Benchmark]: Boogie Preprocessor took 48.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 132.6 MB in the end (delta: -30.5 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,211 INFO L168 Benchmark]: RCFGBuilder took 622.07 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 115.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,211 INFO L168 Benchmark]: TraceAbstraction took 23782.74 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 115.0 MB in the beginning and 87.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,212 INFO L168 Benchmark]: Witness Printer took 4.94 ms. Allocated memory is still 181.4 MB. Free memory was 87.7 MB in the beginning and 87.1 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:49:42,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 134.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 602.95 ms. Allocated memory is still 151.0 MB. Free memory was 124.2 MB in the beginning and 103.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 60.17 ms. Allocated memory is still 151.0 MB. Free memory was 103.8 MB in the beginning and 102.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 48.23 ms. Allocated memory is still 151.0 MB. Free memory was 102.1 MB in the beginning and 132.6 MB in the end (delta: -30.5 MB). Peak memory consumption was 5.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 622.07 ms. Allocated memory is still 151.0 MB. Free memory was 132.6 MB in the beginning and 115.4 MB in the end (delta: 17.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 23782.74 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 115.0 MB in the beginning and 87.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 57.1 MB. Max. memory is 8.0 GB. * Witness Printer took 4.94 ms. Allocated memory is still 181.4 MB. Free memory was 87.7 MB in the beginning and 87.1 MB in the end (delta: 526.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 525]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L513] int i, j; [L514] int length = __VERIFIER_nondet_int(); [L515] COND TRUE length < 1 || length >= 2147483647 / sizeof(int) [L515] length = 1 [L516] int fac = __VERIFIER_nondet_int(); [L517] COND TRUE fac < 1 || fac >= 2147483647 / (sizeof(int) * length) [L517] fac = 1 [L518] int *arr = __builtin_alloca (length*sizeof(int)); [L519] int *arr2 = __builtin_alloca (fac*length*sizeof(int)); [L520] COND FALSE !(!arr || !arr2) [L521] i=0 [L521] COND TRUE i