/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/list-ext-properties/960521-1_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-07 05:18:26,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-07 05:18:26,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-07 05:18:26,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-07 05:18:26,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-07 05:18:26,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-07 05:18:26,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-07 05:18:26,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-07 05:18:26,493 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-07 05:18:26,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-07 05:18:26,503 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-07 05:18:26,505 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-07 05:18:26,505 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-07 05:18:26,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-07 05:18:26,511 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-07 05:18:26,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-07 05:18:26,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-07 05:18:26,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-07 05:18:26,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-07 05:18:26,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-07 05:18:26,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-07 05:18:26,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-07 05:18:26,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-07 05:18:26,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-07 05:18:26,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-07 05:18:26,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-07 05:18:26,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-07 05:18:26,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-07 05:18:26,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-07 05:18:26,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-07 05:18:26,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-07 05:18:26,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-07 05:18:26,576 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-07 05:18:26,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-07 05:18:26,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-07 05:18:26,579 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-07 05:18:26,580 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 05:18:26,642 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-07 05:18:26,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-07 05:18:26,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-07 05:18:26,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-07 05:18:26,649 INFO L138 SettingsManager]: * Use SBE=true [2021-01-07 05:18:26,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-07 05:18:26,650 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-01-07 05:18:26,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-07 05:18:26,650 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-07 05:18:26,650 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-01-07 05:18:26,652 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-01-07 05:18:26,653 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-01-07 05:18:26,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-07 05:18:26,653 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-01-07 05:18:26,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-07 05:18:26,654 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-07 05:18:26,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-07 05:18:26,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-07 05:18:26,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-07 05:18:26,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-07 05:18:26,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-07 05:18:26,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-07 05:18:26,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-07 05:18:26,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-07 05:18:26,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-07 05:18:27,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-07 05:18:27,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-07 05:18:27,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-07 05:18:27,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-07 05:18:27,115 INFO L275 PluginConnector]: CDTParser initialized [2021-01-07 05:18:27,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-01-07 05:18:27,209 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/795cf3c42/e6a05a9db8bd4d559db03a0286a1741e/FLAG191a6f4e4 [2021-01-07 05:18:27,999 INFO L306 CDTParser]: Found 1 translation units. [2021-01-07 05:18:28,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2021-01-07 05:18:28,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/795cf3c42/e6a05a9db8bd4d559db03a0286a1741e/FLAG191a6f4e4 [2021-01-07 05:18:28,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/795cf3c42/e6a05a9db8bd4d559db03a0286a1741e [2021-01-07 05:18:28,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-07 05:18:28,275 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-07 05:18:28,279 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-07 05:18:28,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-07 05:18:28,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-07 05:18:28,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32682360 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28, skipping insertion in model container [2021-01-07 05:18:28,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-07 05:18:28,374 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2021-01-07 05:18:28,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:18:28,785 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~b~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~n~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~a~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~b~0,GLOBAL] left hand side expression in assignment: address: IdentifierExpression[#t~post11,] [2021-01-07 05:18:28,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-07 05:18:28,903 INFO L208 MainTranslator]: Completed translation [2021-01-07 05:18:28,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28 WrapperNode [2021-01-07 05:18:28,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-07 05:18:28,905 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-07 05:18:28,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-07 05:18:28,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-07 05:18:28,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-07 05:18:28,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-07 05:18:28,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-07 05:18:28,957 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-07 05:18:28,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (1/1) ... [2021-01-07 05:18:28,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-07 05:18:28,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-07 05:18:28,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-07 05:18:28,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-07 05:18:28,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (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 05:18:29,085 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-07 05:18:29,086 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-07 05:18:29,086 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-07 05:18:29,619 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-07 05:18:29,619 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-07 05:18:29,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:18:29 BoogieIcfgContainer [2021-01-07 05:18:29,622 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-07 05:18:29,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-07 05:18:29,625 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-07 05:18:29,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-07 05:18:29,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.01 05:18:28" (1/3) ... [2021-01-07 05:18:29,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4376a78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:18:29, skipping insertion in model container [2021-01-07 05:18:29,631 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.01 05:18:28" (2/3) ... [2021-01-07 05:18:29,632 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4376a78f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.01 05:18:29, skipping insertion in model container [2021-01-07 05:18:29,632 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:18:29" (3/3) ... [2021-01-07 05:18:29,634 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2021-01-07 05:18:29,642 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-07 05:18:29,647 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 21 error locations. [2021-01-07 05:18:29,671 INFO L253 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-01-07 05:18:29,697 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-07 05:18:29,698 INFO L378 AbstractCegarLoop]: Hoare is false [2021-01-07 05:18:29,698 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-07 05:18:29,698 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-07 05:18:29,698 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-07 05:18:29,699 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-07 05:18:29,699 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-07 05:18:29,699 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-07 05:18:29,719 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states. [2021-01-07 05:18:29,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-01-07 05:18:29,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:29,727 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-01-07 05:18:29,728 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:29,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:29,737 INFO L82 PathProgramCache]: Analyzing trace with hash 28702701, now seen corresponding path program 1 times [2021-01-07 05:18:29,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:29,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253144762] [2021-01-07 05:18:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:29,924 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 05:18:29,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253144762] [2021-01-07 05:18:29,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:18:29,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163331698] [2021-01-07 05:18:29,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-07 05:18:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:29,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-07 05:18:29,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:18:29,956 INFO L87 Difference]: Start difference. First operand 53 states. Second operand 2 states. [2021-01-07 05:18:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:29,975 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-01-07 05:18:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-07 05:18:29,977 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-01-07 05:18:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:29,989 INFO L225 Difference]: With dead ends: 53 [2021-01-07 05:18:29,989 INFO L226 Difference]: Without dead ends: 51 [2021-01-07 05:18:29,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-07 05:18:30,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-07 05:18:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-01-07 05:18:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-07 05:18:30,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-01-07 05:18:30,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 5 [2021-01-07 05:18:30,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:30,036 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-01-07 05:18:30,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-07 05:18:30,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-01-07 05:18:30,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:18:30,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:30,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:18:30,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-07 05:18:30,038 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:30,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:30,039 INFO L82 PathProgramCache]: Analyzing trace with hash 889569384, now seen corresponding path program 1 times [2021-01-07 05:18:30,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:30,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505581032] [2021-01-07 05:18:30,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:30,118 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 05:18:30,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505581032] [2021-01-07 05:18:30,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:30,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-07 05:18:30,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8402585] [2021-01-07 05:18:30,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-07 05:18:30,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:30,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-07 05:18:30,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-07 05:18:30,123 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 3 states. [2021-01-07 05:18:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:30,189 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-01-07 05:18:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:18:30,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-07 05:18:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:30,192 INFO L225 Difference]: With dead ends: 50 [2021-01-07 05:18:30,192 INFO L226 Difference]: Without dead ends: 50 [2021-01-07 05:18:30,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:18:30,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-07 05:18:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-01-07 05:18:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-07 05:18:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-01-07 05:18:30,201 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 6 [2021-01-07 05:18:30,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:30,202 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-01-07 05:18:30,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-07 05:18:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-01-07 05:18:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-07 05:18:30,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:30,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-07 05:18:30,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-07 05:18:30,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash 889569385, now seen corresponding path program 1 times [2021-01-07 05:18:30,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:30,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631431671] [2021-01-07 05:18:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:30,361 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 05:18:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631431671] [2021-01-07 05:18:30,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:30,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:18:30,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107363258] [2021-01-07 05:18:30,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:18:30,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:30,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:18:30,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:18:30,376 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 4 states. [2021-01-07 05:18:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:30,477 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-01-07 05:18:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:18:30,478 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-07 05:18:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:30,480 INFO L225 Difference]: With dead ends: 97 [2021-01-07 05:18:30,480 INFO L226 Difference]: Without dead ends: 97 [2021-01-07 05:18:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 05:18:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-07 05:18:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 54. [2021-01-07 05:18:30,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-07 05:18:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-01-07 05:18:30,489 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 6 [2021-01-07 05:18:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:30,489 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-01-07 05:18:30,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:18:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-01-07 05:18:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-07 05:18:30,490 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:30,491 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:30,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-07 05:18:30,491 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:30,492 INFO L82 PathProgramCache]: Analyzing trace with hash 179257870, now seen corresponding path program 1 times [2021-01-07 05:18:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:30,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571979184] [2021-01-07 05:18:30,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:30,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:18:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571979184] [2021-01-07 05:18:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757257147] [2021-01-07 05:18:30,597 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 05:18:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:30,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-07 05:18:30,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:18:30,799 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:18:30,800 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 13 treesize of output 15 [2021-01-07 05:18:30,802 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:18:30,812 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:18:30,838 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:18:30,838 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2021-01-07 05:18:30,899 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 05:18:30,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:18:30,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-01-07 05:18:30,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650736707] [2021-01-07 05:18:30,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:18:30,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:30,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:18:30,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-01-07 05:18:30,904 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 5 states. [2021-01-07 05:18:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:31,020 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2021-01-07 05:18:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:18:31,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-07 05:18:31,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:31,023 INFO L225 Difference]: With dead ends: 96 [2021-01-07 05:18:31,023 INFO L226 Difference]: Without dead ends: 96 [2021-01-07 05:18:31,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:18:31,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-07 05:18:31,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 49. [2021-01-07 05:18:31,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-07 05:18:31,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2021-01-07 05:18:31,031 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 8 [2021-01-07 05:18:31,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:31,031 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2021-01-07 05:18:31,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:18:31,032 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2021-01-07 05:18:31,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:18:31,032 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:31,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:31,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:18:31,247 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:31,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292751, now seen corresponding path program 1 times [2021-01-07 05:18:31,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:31,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432977340] [2021-01-07 05:18:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:31,320 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 05:18:31,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432977340] [2021-01-07 05:18:31,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:31,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:18:31,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402075705] [2021-01-07 05:18:31,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:18:31,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:31,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:18:31,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:18:31,323 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 4 states. [2021-01-07 05:18:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:31,366 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2021-01-07 05:18:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-07 05:18:31,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-01-07 05:18:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:31,368 INFO L225 Difference]: With dead ends: 46 [2021-01-07 05:18:31,368 INFO L226 Difference]: Without dead ends: 46 [2021-01-07 05:18:31,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:18:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-07 05:18:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-07 05:18:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-07 05:18:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-01-07 05:18:31,374 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 9 [2021-01-07 05:18:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:31,374 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-01-07 05:18:31,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:18:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-01-07 05:18:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-07 05:18:31,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:31,375 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:31,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-07 05:18:31,376 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:31,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:31,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1213292752, now seen corresponding path program 1 times [2021-01-07 05:18:31,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:31,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466828298] [2021-01-07 05:18:31,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:31,457 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 05:18:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466828298] [2021-01-07 05:18:31,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:31,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-07 05:18:31,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983833376] [2021-01-07 05:18:31,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:18:31,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:18:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:18:31,460 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 6 states. [2021-01-07 05:18:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:31,617 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2021-01-07 05:18:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:18:31,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-07 05:18:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:31,620 INFO L225 Difference]: With dead ends: 86 [2021-01-07 05:18:31,620 INFO L226 Difference]: Without dead ends: 86 [2021-01-07 05:18:31,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-07 05:18:31,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-07 05:18:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2021-01-07 05:18:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-07 05:18:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-01-07 05:18:31,628 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 9 [2021-01-07 05:18:31,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:31,628 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-01-07 05:18:31,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:18:31,629 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-01-07 05:18:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-07 05:18:31,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:31,630 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:31,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-07 05:18:31,630 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:31,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:31,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1626816779, now seen corresponding path program 1 times [2021-01-07 05:18:31,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:31,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875662548] [2021-01-07 05:18:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-07 05:18:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875662548] [2021-01-07 05:18:31,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772982923] [2021-01-07 05:18:31,721 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 05:18:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-07 05:18:31,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:18:31,833 INFO L348 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-01-07 05:18:31,834 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 13 treesize of output 15 [2021-01-07 05:18:31,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-07 05:18:31,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-07 05:18:31,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-01-07 05:18:31,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:34 [2021-01-07 05:18:31,924 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 05:18:31,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:18:31,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-01-07 05:18:31,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666101978] [2021-01-07 05:18:31,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-07 05:18:31,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:31,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-07 05:18:31,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-01-07 05:18:31,927 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 6 states. [2021-01-07 05:18:32,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:32,124 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2021-01-07 05:18:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-07 05:18:32,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2021-01-07 05:18:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:32,126 INFO L225 Difference]: With dead ends: 92 [2021-01-07 05:18:32,126 INFO L226 Difference]: Without dead ends: 92 [2021-01-07 05:18:32,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-01-07 05:18:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-07 05:18:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 59. [2021-01-07 05:18:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-07 05:18:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-01-07 05:18:32,133 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-01-07 05:18:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:32,133 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-01-07 05:18:32,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-07 05:18:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-01-07 05:18:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-07 05:18:32,134 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:32,134 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:32,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:18:32,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:32,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1240415274, now seen corresponding path program 1 times [2021-01-07 05:18:32,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:32,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669737696] [2021-01-07 05:18:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:32,443 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 05:18:32,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669737696] [2021-01-07 05:18:32,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179316640] [2021-01-07 05:18:32,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:18:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:32,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-07 05:18:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-07 05:18:32,603 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 05:18:32,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-07 05:18:32,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-01-07 05:18:32,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856850180] [2021-01-07 05:18:32,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-07 05:18:32,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:32,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-07 05:18:32,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:18:32,606 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand 5 states. [2021-01-07 05:18:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:32,655 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2021-01-07 05:18:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-07 05:18:32,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-07 05:18:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:32,657 INFO L225 Difference]: With dead ends: 85 [2021-01-07 05:18:32,657 INFO L226 Difference]: Without dead ends: 85 [2021-01-07 05:18:32,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-01-07 05:18:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-07 05:18:32,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-01-07 05:18:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-07 05:18:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-01-07 05:18:32,663 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 12 [2021-01-07 05:18:32,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:32,663 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-01-07 05:18:32,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-07 05:18:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-01-07 05:18:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:18:32,664 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:32,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:32,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-07 05:18:32,879 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:32,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:32,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777546, now seen corresponding path program 1 times [2021-01-07 05:18:32,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:32,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736427632] [2021-01-07 05:18:32,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-07 05:18:32,930 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 05:18:32,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736427632] [2021-01-07 05:18:32,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-07 05:18:32,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-07 05:18:32,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940722646] [2021-01-07 05:18:32,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-07 05:18:32,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-07 05:18:32,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-07 05:18:32,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-07 05:18:32,933 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 4 states. [2021-01-07 05:18:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-07 05:18:32,996 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2021-01-07 05:18:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-07 05:18:32,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-07 05:18:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-07 05:18:32,997 INFO L225 Difference]: With dead ends: 56 [2021-01-07 05:18:32,997 INFO L226 Difference]: Without dead ends: 56 [2021-01-07 05:18:32,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 05:18:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-07 05:18:33,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-01-07 05:18:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-07 05:18:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-07 05:18:33,002 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 14 [2021-01-07 05:18:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-07 05:18:33,003 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-07 05:18:33,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-07 05:18:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-07 05:18:33,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-07 05:18:33,004 INFO L414 BasicCegarLoop]: Found error trace [2021-01-07 05:18:33,004 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-07 05:18:33,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-07 05:18:33,004 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE]=== [2021-01-07 05:18:33,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-07 05:18:33,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1961777547, now seen corresponding path program 1 times [2021-01-07 05:18:33,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-07 05:18:33,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846175401] [2021-01-07 05:18:33,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-07 05:18:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:18:33,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:18:33,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-01-07 05:18:33,097 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-01-07 05:18:33,129 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-01-07 05:18:33,129 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-01-07 05:18:33,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-07 05:18:33,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.01 05:18:33 BoogieIcfgContainer [2021-01-07 05:18:33,176 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-07 05:18:33,176 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-07 05:18:33,176 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-07 05:18:33,177 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-07 05:18:33,177 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.01 05:18:29" (3/4) ... [2021-01-07 05:18:33,180 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-01-07 05:18:33,234 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-ext-properties/960521-1_1-1.i-witness.graphml [2021-01-07 05:18:33,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-07 05:18:33,238 INFO L168 Benchmark]: Toolchain (without parser) took 4961.98 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 128.8 MB in the beginning and 167.5 MB in the end (delta: -38.7 MB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,240 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:18:33,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 625.14 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 107.2 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.84 ms. Allocated memory is still 155.2 MB. Free memory was 107.2 MB in the beginning and 105.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,244 INFO L168 Benchmark]: Boogie Preprocessor took 33.52 ms. Allocated memory is still 155.2 MB. Free memory was 105.6 MB in the beginning and 104.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,245 INFO L168 Benchmark]: RCFGBuilder took 630.84 ms. Allocated memory is still 155.2 MB. Free memory was 104.1 MB in the beginning and 83.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,247 INFO L168 Benchmark]: TraceAbstraction took 3551.32 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 82.7 MB in the beginning and 170.1 MB in the end (delta: -87.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-07 05:18:33,248 INFO L168 Benchmark]: Witness Printer took 58.19 ms. Allocated memory is still 194.0 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-07 05:18:33,254 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 155.2 MB. Free memory is still 130.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 625.14 ms. Allocated memory is still 155.2 MB. Free memory was 128.8 MB in the beginning and 107.2 MB in the end (delta: 21.6 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 50.84 ms. Allocated memory is still 155.2 MB. Free memory was 107.2 MB in the beginning and 105.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.52 ms. Allocated memory is still 155.2 MB. Free memory was 105.6 MB in the beginning and 104.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 630.84 ms. Allocated memory is still 155.2 MB. Free memory was 104.1 MB in the beginning and 83.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3551.32 ms. Allocated memory was 155.2 MB in the beginning and 194.0 MB in the end (delta: 38.8 MB). Free memory was 82.7 MB in the beginning and 170.1 MB in the end (delta: -87.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 58.19 ms. Allocated memory is still 194.0 MB. Free memory was 170.1 MB in the beginning and 167.5 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 544]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-2:0}, b={-1:4}, n=1] [L542] *b++ = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L528] int i; [L529] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND TRUE i < n VAL [a={-2:0}, b={-1:4}, n=1] [L530] a[i] = n VAL [a={-2:0}, b={-1:4}, n=1] [L529] i++ VAL [a={-2:0}, b={-1:4}, n=1] [L529] COND FALSE !(i < n) VAL [a={-2:0}, b={-1:4}, n=1] [L531] i = 0 VAL [a={-2:0}, b={-1:4}, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={-2:0}, b={-1:4}, n=1] [L544] b[-2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 53 locations, 21 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.4s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 461 SDtfs, 509 SDslu, 485 SDs, 0 SdLazy, 396 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 174 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 4840 SizeOfPredicates, 11 NumberOfNonLiveVariables, 240 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 12 InterpolantComputations, 9 PerfectInterpolantSequences, 8/13 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...