/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-178dd20 [2021-01-07 05:00:38,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:00:38,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:00:38,354 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:00:38,355 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:00:38,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:00:38,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:00:38,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:00:38,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:00:38,365 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:00:38,366 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:00:38,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:00:38,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:00:38,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:00:38,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:00:38,373 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:00:38,374 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:00:38,375 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:00:38,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:00:38,380 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:00:38,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:00:38,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:00:38,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:00:38,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:00:38,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:00:38,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:00:38,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:00:38,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:00:38,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:00:38,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:00:38,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:00:38,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:00:38,429 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:00:38,429 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:00:38,430 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:00:38,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:00:38,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2021-01-07 05:00:38,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:00:38,487 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:00:38,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:00:38,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:00:38,492 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:00:38,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:00:38,493 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:00:38,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:00:38,494 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:00:38,494 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:00:38,495 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:00:38,496 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:00:38,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:00:38,496 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:00:38,497 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:00:38,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:00:38,497 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:00:38,497 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:00:38,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:38,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:00:38,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:00:38,498 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:00:38,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:00:38,499 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:00:38,499 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:00:38,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:00:38,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:00:38,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:00:38,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:00:38,990 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:00:38,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2021-01-07 05:00:39,078 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1d6f3a1c/68531f1f69404193bb8a50414f388519/FLAG5014cdae2 [2021-01-07 05:00:39,734 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:00:39,735 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/mult_array-alloca-1.i [2021-01-07 05:00:39,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1d6f3a1c/68531f1f69404193bb8a50414f388519/FLAG5014cdae2 [2021-01-07 05:00:40,038 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d1d6f3a1c/68531f1f69404193bb8a50414f388519 [2021-01-07 05:00:40,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:00:40,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:00:40,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:40,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:00:40,050 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:00:40,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,052 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e940b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40, skipping insertion in model container [2021-01-07 05:00:40,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,061 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:00:40,097 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,]]]]] [2021-01-07 05:00:40,440 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:40,451 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,]]]]] [2021-01-07 05:00:40,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:00:40,603 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:00:40,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40 WrapperNode [2021-01-07 05:00:40,604 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:00:40,605 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:40,605 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:00:40,605 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:00:40,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,692 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:00:40,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:00:40,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:00:40,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:00:40,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,715 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,742 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... [2021-01-07 05:00:40,744 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:00:40,745 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:00:40,746 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:00:40,746 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:00:40,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:00:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:00:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:00:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:00:40,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:00:40,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:00:40,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:00:41,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:00:41,336 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-07 05:00:41,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:41 BoogieIcfgContainer [2021-01-07 05:00:41,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:00:41,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:00:41,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:00:41,351 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:00:41,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:00:40" (1/3) ... [2021-01-07 05:00:41,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ec7a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:41, skipping insertion in model container [2021-01-07 05:00:41,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:00:40" (2/3) ... [2021-01-07 05:00:41,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ec7a4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:00:41, skipping insertion in model container [2021-01-07 05:00:41,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:41" (3/3) ... [2021-01-07 05:00:41,361 INFO L111 eAbstractionObserver]: Analyzing ICFG mult_array-alloca-1.i [2021-01-07 05:00:41,378 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:00:41,388 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-01-07 05:00:41,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-01-07 05:00:41,434 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:00:41,435 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:00:41,435 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:00:41,435 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:00:41,435 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:00:41,435 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:00:41,435 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:00:41,436 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:00:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2021-01-07 05:00:41,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-07 05:00:41,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:41,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:41,460 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]=== [2021-01-07 05:00:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:41,467 INFO L82 PathProgramCache]: Analyzing trace with hash 119383862, now seen corresponding path program 1 times [2021-01-07 05:00:41,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:41,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272761924] [2021-01-07 05:00:41,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:41,585 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:41,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952772611] [2021-01-07 05:00:41,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-07 05:00:41,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:41,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272761924] [2021-01-07 05:00:41,787 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952772611] [2021-01-07 05:00:41,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:41,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:00:41,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462613875] [2021-01-07 05:00:41,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:00:41,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:41,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:00:41,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:00:41,815 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2021-01-07 05:00:41,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:41,875 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-01-07 05:00:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:00:41,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-01-07 05:00:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:41,886 INFO L225 Difference]: With dead ends: 28 [2021-01-07 05:00:41,887 INFO L226 Difference]: Without dead ends: 26 [2021-01-07 05:00:41,888 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 [2021-01-07 05:00:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-07 05:00:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-01-07 05:00:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-07 05:00:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-07 05:00:41,928 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2021-01-07 05:00:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:41,928 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-07 05:00:41,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:00:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-07 05:00:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:00:41,929 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:41,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:42,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-07 05:00:42,144 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]=== [2021-01-07 05:00:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:42,146 INFO L82 PathProgramCache]: Analyzing trace with hash -594066643, now seen corresponding path program 1 times [2021-01-07 05:00:42,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:42,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964974416] [2021-01-07 05:00:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:42,168 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:42,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66121750] [2021-01-07 05:00:42,169 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 [2021-01-07 05:00:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:00:42,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:42,318 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_10|], 1=[|v_#valid_21|]} [2021-01-07 05:00:42,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-07 05:00:42,339 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 [2021-01-07 05:00:42,342 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:42,358 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:42,369 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 [2021-01-07 05:00:42,372 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:42,386 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:42,413 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. [2021-01-07 05:00:42,413 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:35 [2021-01-07 05:00:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:42,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964974416] [2021-01-07 05:00:42,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:42,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66121750] [2021-01-07 05:00:42,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:42,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:42,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695246088] [2021-01-07 05:00:42,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:42,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:42,534 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2021-01-07 05:00:44,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:44,776 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-01-07 05:00:44,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:44,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-07 05:00:44,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:44,778 INFO L225 Difference]: With dead ends: 52 [2021-01-07 05:00:44,778 INFO L226 Difference]: Without dead ends: 52 [2021-01-07 05:00:44,780 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 [2021-01-07 05:00:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-07 05:00:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-01-07 05:00:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-07 05:00:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-07 05:00:44,787 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2021-01-07 05:00:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:44,787 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-07 05:00:44,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:44,788 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-07 05:00:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:00:44,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:44,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:45,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:45,004 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]=== [2021-01-07 05:00:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:45,006 INFO L82 PathProgramCache]: Analyzing trace with hash -594066644, now seen corresponding path program 1 times [2021-01-07 05:00:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:45,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993534584] [2021-01-07 05:00:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:45,016 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:45,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39507887] [2021-01-07 05:00:45,031 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 [2021-01-07 05:00:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:45,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-07 05:00:45,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:45,111 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-01-07 05:00:45,111 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 [2021-01-07 05:00:45,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:45,119 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:45,121 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. [2021-01-07 05:00:45,122 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2021-01-07 05:00:45,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993534584] [2021-01-07 05:00:45,142 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39507887] [2021-01-07 05:00:45,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:45,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:00:45,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456606839] [2021-01-07 05:00:45,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:00:45,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:00:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:00:45,145 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 3 states. [2021-01-07 05:00:45,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:45,177 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-01-07 05:00:45,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:00:45,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-07 05:00:45,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:45,180 INFO L225 Difference]: With dead ends: 28 [2021-01-07 05:00:45,181 INFO L226 Difference]: Without dead ends: 28 [2021-01-07 05:00:45,181 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 [2021-01-07 05:00:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-07 05:00:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-07 05:00:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:00:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-01-07 05:00:45,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 9 [2021-01-07 05:00:45,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:45,191 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-01-07 05:00:45,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:00:45,191 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-01-07 05:00:45,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:00:45,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:45,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:45,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:45,406 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]=== [2021-01-07 05:00:45,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:45,407 INFO L82 PathProgramCache]: Analyzing trace with hash -592219601, now seen corresponding path program 1 times [2021-01-07 05:00:45,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:45,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692834132] [2021-01-07 05:00:45,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:45,420 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:45,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101178137] [2021-01-07 05:00:45,420 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 [2021-01-07 05:00:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:45,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:00:45,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:45,533 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_11|], 1=[|v_#valid_23|]} [2021-01-07 05:00:45,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-07 05:00:45,541 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 [2021-01-07 05:00:45,543 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:45,557 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:45,565 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 [2021-01-07 05:00:45,569 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:45,581 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:45,602 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. [2021-01-07 05:00:45,603 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:30, output treesize:35 [2021-01-07 05:00:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:45,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692834132] [2021-01-07 05:00:45,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:45,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101178137] [2021-01-07 05:00:45,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:45,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:00:45,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552062397] [2021-01-07 05:00:45,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:45,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:45,718 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2021-01-07 05:00:47,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:47,870 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-07 05:00:47,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:47,871 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-01-07 05:00:47,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:47,871 INFO L225 Difference]: With dead ends: 32 [2021-01-07 05:00:47,872 INFO L226 Difference]: Without dead ends: 32 [2021-01-07 05:00:47,872 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 [2021-01-07 05:00:47,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-07 05:00:47,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-01-07 05:00:47,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-07 05:00:47,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-01-07 05:00:47,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 9 [2021-01-07 05:00:47,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:47,876 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-01-07 05:00:47,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-01-07 05:00:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-07 05:00:47,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:47,877 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:48,088 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:48,089 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]=== [2021-01-07 05:00:48,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:48,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1806384368, now seen corresponding path program 1 times [2021-01-07 05:00:48,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:48,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526959273] [2021-01-07 05:00:48,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:48,100 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:48,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192075453] [2021-01-07 05:00:48,100 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 [2021-01-07 05:00:48,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:48,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-07 05:00:48,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:48,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526959273] [2021-01-07 05:00:48,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:48,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192075453] [2021-01-07 05:00:48,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:48,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:00:48,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041633533] [2021-01-07 05:00:48,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:00:48,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:00:48,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:00:48,191 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2021-01-07 05:00:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:52,306 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-01-07 05:00:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:00:52,307 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2021-01-07 05:00:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:52,308 INFO L225 Difference]: With dead ends: 47 [2021-01-07 05:00:52,308 INFO L226 Difference]: Without dead ends: 47 [2021-01-07 05:00:52,308 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 [2021-01-07 05:00:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-07 05:00:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2021-01-07 05:00:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-07 05:00:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-01-07 05:00:52,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2021-01-07 05:00:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:52,313 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-01-07 05:00:52,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:00:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-01-07 05:00:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-07 05:00:52,314 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:52,314 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:52,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:52,526 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]=== [2021-01-07 05:00:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:52,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1787518350, now seen corresponding path program 1 times [2021-01-07 05:00:52,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:52,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903935053] [2021-01-07 05:00:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:52,536 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:52,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068286182] [2021-01-07 05:00:52,537 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 [2021-01-07 05:00:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:52,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-07 05:00:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:52,592 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_12|], 1=[|v_#valid_24|]} [2021-01-07 05:00:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-07 05:00:52,597 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 [2021-01-07 05:00:52,599 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:52,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:52,618 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 [2021-01-07 05:00:52,620 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-07 05:00:52,630 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:00:52,634 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. [2021-01-07 05:00:52,634 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:24 [2021-01-07 05:00:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:52,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903935053] [2021-01-07 05:00:52,817 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:52,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068286182] [2021-01-07 05:00:52,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:00:52,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-07 05:00:52,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530612051] [2021-01-07 05:00:52,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:00:52,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:52,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:00:52,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:00:52,819 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2021-01-07 05:00:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:52,999 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-01-07 05:00:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:00:53,000 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-01-07 05:00:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:53,001 INFO L225 Difference]: With dead ends: 36 [2021-01-07 05:00:53,001 INFO L226 Difference]: Without dead ends: 36 [2021-01-07 05:00:53,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-01-07 05:00:53,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-01-07 05:00:53,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-07 05:00:53,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-01-07 05:00:53,006 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2021-01-07 05:00:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:53,006 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-01-07 05:00:53,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:00:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-01-07 05:00:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:53,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:53,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:53,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:53,220 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]=== [2021-01-07 05:00:53,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:53,221 INFO L82 PathProgramCache]: Analyzing trace with hash 768538716, now seen corresponding path program 1 times [2021-01-07 05:00:53,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:53,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794591161] [2021-01-07 05:00:53,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:53,232 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:53,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249027585] [2021-01-07 05:00:53,233 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 [2021-01-07 05:00:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:53,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-07 05:00:53,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794591161] [2021-01-07 05:00:53,389 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:53,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249027585] [2021-01-07 05:00:53,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:53,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-07 05:00:53,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141685265] [2021-01-07 05:00:53,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-07 05:00:53,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:53,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-07 05:00:53,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:00:53,396 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2021-01-07 05:00:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:53,487 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-01-07 05:00:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-07 05:00:53,488 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2021-01-07 05:00:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:53,489 INFO L225 Difference]: With dead ends: 44 [2021-01-07 05:00:53,489 INFO L226 Difference]: Without dead ends: 44 [2021-01-07 05:00:53,489 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 [2021-01-07 05:00:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-07 05:00:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2021-01-07 05:00:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-07 05:00:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2021-01-07 05:00:53,494 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 15 [2021-01-07 05:00:53,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:53,494 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2021-01-07 05:00:53,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-07 05:00:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2021-01-07 05:00:53,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:53,495 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:53,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:53,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:00:53,704 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]=== [2021-01-07 05:00:53,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:53,705 INFO L82 PathProgramCache]: Analyzing trace with hash 181732702, now seen corresponding path program 1 times [2021-01-07 05:00:53,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:53,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049137725] [2021-01-07 05:00:53,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:53,714 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:53,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [622055540] [2021-01-07 05:00:53,714 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 [2021-01-07 05:00:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:53,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-07 05:00:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049137725] [2021-01-07 05:00:53,901 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622055540] [2021-01-07 05:00:53,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:53,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:00:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617764624] [2021-01-07 05:00:53,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:00:53,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:53,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:00:53,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:00:53,903 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2021-01-07 05:00:58,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:00:58,083 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-01-07 05:00:58,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:00:58,084 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-07 05:00:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:00:58,085 INFO L225 Difference]: With dead ends: 73 [2021-01-07 05:00:58,085 INFO L226 Difference]: Without dead ends: 73 [2021-01-07 05:00:58,085 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 [2021-01-07 05:00:58,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-07 05:00:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2021-01-07 05:00:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-07 05:00:58,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-01-07 05:00:58,091 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 15 [2021-01-07 05:00:58,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:00:58,091 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-01-07 05:00:58,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:00:58,091 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-01-07 05:00:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-07 05:00:58,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:00:58,092 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:00:58,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-07 05:00:58,295 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]=== [2021-01-07 05:00:58,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:00:58,296 INFO L82 PathProgramCache]: Analyzing trace with hash 882797280, now seen corresponding path program 1 times [2021-01-07 05:00:58,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:00:58,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183894285] [2021-01-07 05:00:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:00:58,305 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:00:58,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505693078] [2021-01-07 05:00:58,305 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 [2021-01-07 05:00:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:00:58,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-07 05:00:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:00:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:00:58,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183894285] [2021-01-07 05:00:58,486 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:00:58,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505693078] [2021-01-07 05:00:58,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:00:58,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-01-07 05:00:58,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327767217] [2021-01-07 05:00:58,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-07 05:00:58,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:00:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-07 05:00:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:00:58,488 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand 8 states. [2021-01-07 05:01:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:00,619 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-01-07 05:01:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-07 05:01:00,619 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-07 05:01:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:00,621 INFO L225 Difference]: With dead ends: 51 [2021-01-07 05:01:00,621 INFO L226 Difference]: Without dead ends: 51 [2021-01-07 05:01:00,622 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 [2021-01-07 05:01:00,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-07 05:01:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-01-07 05:01:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-07 05:01:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-01-07 05:01:00,626 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2021-01-07 05:01:00,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:00,626 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-01-07 05:01:00,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-07 05:01:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-01-07 05:01:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:01:00,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:00,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:00,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:00,832 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]=== [2021-01-07 05:01:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1945105130, now seen corresponding path program 1 times [2021-01-07 05:01:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:00,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188215513] [2021-01-07 05:01:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:00,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:01:00,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182052267] [2021-01-07 05:01:00,842 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 [2021-01-07 05:01:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:00,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-07 05:01:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:00,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:01:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188215513] [2021-01-07 05:01:00,949 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:01:00,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182052267] [2021-01-07 05:01:00,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:01:00,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-07 05:01:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439299247] [2021-01-07 05:01:00,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:01:00,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:00,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:01:00,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-07 05:01:00,951 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2021-01-07 05:01:00,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:00,993 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-01-07 05:01:00,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:01:00,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-07 05:01:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:00,994 INFO L225 Difference]: With dead ends: 31 [2021-01-07 05:01:00,994 INFO L226 Difference]: Without dead ends: 29 [2021-01-07 05:01:00,994 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 [2021-01-07 05:01:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-07 05:01:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-01-07 05:01:00,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-07 05:01:00,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-01-07 05:01:00,999 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-01-07 05:01:00,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:00,999 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-01-07 05:01:00,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:01:00,999 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-01-07 05:01:01,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:01:01,000 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:01,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:01,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:01,215 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]=== [2021-01-07 05:01:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1945103590, now seen corresponding path program 1 times [2021-01-07 05:01:01,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:01,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064777298] [2021-01-07 05:01:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:01,225 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:01:01,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932201389] [2021-01-07 05:01:01,226 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 [2021-01-07 05:01:01,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:01,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-07 05:01:01,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:01,296 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-01-07 05:01:01,297 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 [2021-01-07 05:01:01,300 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:01,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:01,307 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. [2021-01-07 05:01:01,307 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2021-01-07 05:01:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-07 05:01:01,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064777298] [2021-01-07 05:01:01,329 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:01:01,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932201389] [2021-01-07 05:01:01,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:01:01,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:01:01,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642280644] [2021-01-07 05:01:01,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:01:01,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:01:01,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:01:01,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:01:01,331 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2021-01-07 05:01:01,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:01:01,343 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-01-07 05:01:01,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:01:01,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-07 05:01:01,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:01:01,347 INFO L225 Difference]: With dead ends: 28 [2021-01-07 05:01:01,347 INFO L226 Difference]: Without dead ends: 28 [2021-01-07 05:01:01,347 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 [2021-01-07 05:01:01,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-07 05:01:01,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-01-07 05:01:01,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-07 05:01:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-07 05:01:01,356 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2021-01-07 05:01:01,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:01:01,357 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-07 05:01:01,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:01:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-07 05:01:01,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-07 05:01:01,363 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:01:01,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:01:01,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-07 05:01:01,579 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]=== [2021-01-07 05:01:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:01:01,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1945103589, now seen corresponding path program 1 times [2021-01-07 05:01:01,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:01:01,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704969213] [2021-01-07 05:01:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:01:01,591 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-07 05:01:01,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116165363] [2021-01-07 05:01:01,591 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 [2021-01-07 05:01:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:01:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-07 05:01:01,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:01:01,670 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:01:01,671 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 [2021-01-07 05:01:01,674 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:01:01,706 INFO L625 ElimStorePlain]: treesize reduction 14, result has 63.2 percent of original size [2021-01-07 05:01:01,709 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-07 05:01:01,709 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:13 [2021-01-07 05:01:01,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704969213] [2021-01-07 05:01:01,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-07 05:01:01,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116165363] [2021-01-07 05:01:01,746 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-07 05:01:01,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:01:01,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-01-07 05:01:01,747 ERROR L205 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-01-07 05:01:01,747 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-07 05:01:01,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:01:01,982 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-01-07 05:01:01,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:01:01 BoogieIcfgContainer [2021-01-07 05:01:01,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:01:01,984 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:01:01,984 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:01:01,984 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:01:01,985 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:00:41" (3/4) ... [2021-01-07 05:01:01,989 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-01-07 05:01:01,989 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:01:01,990 INFO L168 Benchmark]: Toolchain (without parser) took 21946.43 ms. Allocated memory was 162.5 MB in the beginning and 213.9 MB in the end (delta: 51.4 MB). Free memory was 136.1 MB in the beginning and 128.7 MB in the end (delta: 7.4 MB). Peak memory consumption was 59.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,991 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 162.5 MB. Free memory was 135.9 MB in the beginning and 135.8 MB in the end (delta: 89.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:01:01,991 INFO L168 Benchmark]: CACSL2BoogieTranslator took 558.27 ms. Allocated memory is still 162.5 MB. Free memory was 135.8 MB in the beginning and 115.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,992 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.50 ms. Allocated memory is still 162.5 MB. Free memory was 115.7 MB in the beginning and 113.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,992 INFO L168 Benchmark]: Boogie Preprocessor took 50.74 ms. Allocated memory is still 162.5 MB. Free memory was 113.9 MB in the beginning and 112.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,993 INFO L168 Benchmark]: RCFGBuilder took 596.04 ms. Allocated memory is still 162.5 MB. Free memory was 112.6 MB in the beginning and 129.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,994 INFO L168 Benchmark]: TraceAbstraction took 20636.98 ms. Allocated memory was 162.5 MB in the beginning and 213.9 MB in the end (delta: 51.4 MB). Free memory was 129.9 MB in the beginning and 129.2 MB in the end (delta: 665.3 kB). Peak memory consumption was 53.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:01:01,994 INFO L168 Benchmark]: Witness Printer took 5.13 ms. Allocated memory is still 213.9 MB. Free memory was 129.2 MB in the beginning and 128.7 MB in the end (delta: 522.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:01:01,998 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 162.5 MB. Free memory was 135.9 MB in the beginning and 135.8 MB in the end (delta: 89.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 558.27 ms. Allocated memory is still 162.5 MB. Free memory was 135.8 MB in the beginning and 115.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.50 ms. Allocated memory is still 162.5 MB. Free memory was 115.7 MB in the beginning and 113.9 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.74 ms. Allocated memory is still 162.5 MB. Free memory was 113.9 MB in the beginning and 112.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 596.04 ms. Allocated memory is still 162.5 MB. Free memory was 112.6 MB in the beginning and 129.9 MB in the end (delta: -17.3 MB). Peak memory consumption was 5.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20636.98 ms. Allocated memory was 162.5 MB in the beginning and 213.9 MB in the end (delta: 51.4 MB). Free memory was 129.9 MB in the beginning and 129.2 MB in the end (delta: 665.3 kB). Peak memory consumption was 53.1 MB. Max. memory is 8.0 GB. * Witness Printer took 5.13 ms. Allocated memory is still 213.9 MB. Free memory was 129.2 MB in the beginning and 128.7 MB in the end (delta: 522.2 kB). There was no memory consumed. 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