/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:45:59,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:45:59,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:45:59,936 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:45:59,937 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:45:59,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:45:59,945 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:45:59,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:45:59,955 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:45:59,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:45:59,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:45:59,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:45:59,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:45:59,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:45:59,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:45:59,978 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:45:59,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:45:59,996 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:45:59,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:46:00,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:46:00,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:46:00,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:46:00,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:46:00,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:46:00,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:46:00,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:46:00,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:46:00,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:46:00,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:46:00,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:46:00,017 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:46:00,018 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:46:00,018 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:46:00,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:46:00,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:46:00,020 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:46:00,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:46:00,051 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:46:00,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:46:00,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:46:00,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:46:00,054 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:46:00,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:46:00,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:46:00,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:46:00,055 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:46:00,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:46:00,055 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:46:00,056 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:46:00,056 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:46:00,056 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:46:00,056 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:46:00,057 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:46:00,057 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:46:00,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:00,057 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:46:00,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:46:00,058 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:46:00,058 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:46:00,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:46:00,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:46:00,059 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:46:00,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:46:00,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:46:00,472 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:46:00,477 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:46:00,479 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:46:00,480 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:46:00,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/string-1.i [2020-12-23 06:46:00,572 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1d6c4c63/dabbc21330bf4653b38806e4a98d4235/FLAGf1a637cdb [2020-12-23 06:46:01,167 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:46:01,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/string-1.i [2020-12-23 06:46:01,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1d6c4c63/dabbc21330bf4653b38806e4a98d4235/FLAGf1a637cdb [2020-12-23 06:46:01,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/a1d6c4c63/dabbc21330bf4653b38806e4a98d4235 [2020-12-23 06:46:01,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:46:01,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:46:01,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:01,546 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:46:01,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:46:01,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a510311 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01, skipping insertion in model container [2020-12-23 06:46:01,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:46:01,586 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:46:01,812 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/string-1.i[896,909] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~string_A~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~string_B~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~nc_A~0,] left hand side expression in assignment: lhs: VariableLHS[~nc_B~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~found~0,] [2020-12-23 06:46:01,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:01,847 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:46:01,862 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/string-1.i[896,909] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#string_A~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#string_A~0,],offset],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[~#string_B~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#string_B~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: lhs: VariableLHS[~nc_A~0,] left hand side expression in assignment: lhs: VariableLHS[~nc_B~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~found~0,] [2020-12-23 06:46:01,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:46:01,891 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:46:01,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01 WrapperNode [2020-12-23 06:46:01,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:46:01,893 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:01,893 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:46:01,893 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:46:01,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:46:01,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:46:01,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:46:01,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:46:01,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,962 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... [2020-12-23 06:46:01,964 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:46:01,965 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:46:01,965 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:46:01,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:46:01,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:46:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:46:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:46:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 06:46:02,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:46:02,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:46:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:46:02,066 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:46:02,533 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:46:02,533 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 06:46:02,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:02 BoogieIcfgContainer [2020-12-23 06:46:02,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:46:02,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:46:02,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:46:02,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:46:02,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:46:01" (1/3) ... [2020-12-23 06:46:02,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239cae9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:02, skipping insertion in model container [2020-12-23 06:46:02,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:46:01" (2/3) ... [2020-12-23 06:46:02,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@239cae9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:46:02, skipping insertion in model container [2020-12-23 06:46:02,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:02" (3/3) ... [2020-12-23 06:46:02,553 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-12-23 06:46:02,562 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:46:02,567 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:46:02,597 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:46:02,648 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:46:02,648 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:46:02,649 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:46:02,649 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:46:02,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:46:02,649 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:46:02,650 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:46:02,650 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:46:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-12-23 06:46:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:46:02,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:02,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:02,679 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2020-12-23 06:46:02,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:02,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532339166] [2020-12-23 06:46:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:02,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532339166] [2020-12-23 06:46:02,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:02,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:46:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271341866] [2020-12-23 06:46:02,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:46:02,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:46:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:02,967 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-12-23 06:46:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:02,990 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2020-12-23 06:46:02,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:46:02,992 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-12-23 06:46:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:03,002 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:46:03,003 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:46:03,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:46:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:46:03,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-23 06:46:03,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 06:46:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-23 06:46:03,048 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2020-12-23 06:46:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:03,049 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-23 06:46:03,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:46:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-23 06:46:03,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:46:03,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:03,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:03,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:46:03,053 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2020-12-23 06:46:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:03,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401483336] [2020-12-23 06:46:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:46:03,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401483336] [2020-12-23 06:46:03,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:46:03,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:46:03,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357807686] [2020-12-23 06:46:03,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:46:03,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:46:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:46:03,179 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 3 states. [2020-12-23 06:46:03,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:03,292 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2020-12-23 06:46:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:46:03,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 06:46:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:03,296 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:46:03,297 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:46:03,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:46:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:46:03,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-12-23 06:46:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-23 06:46:03,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-23 06:46:03,309 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 18 [2020-12-23 06:46:03,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:03,310 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-23 06:46:03,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:46:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-23 06:46:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:46:03,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:03,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:03,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:46:03,312 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2020-12-23 06:46:03,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:03,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634857460] [2020-12-23 06:46:03,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:03,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:46:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634857460] [2020-12-23 06:46:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772893750] [2020-12-23 06:46:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:46:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 06:46:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:46:03,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:46:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331358439] [2020-12-23 06:46:03,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:03,577 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-23 06:46:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:03,679 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-12-23 06:46:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:46:03,680 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-12-23 06:46:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:03,682 INFO L225 Difference]: With dead ends: 61 [2020-12-23 06:46:03,682 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:46:03,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:46:03,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:46:03,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2020-12-23 06:46:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-23 06:46:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-12-23 06:46:03,690 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2020-12-23 06:46:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:03,691 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-12-23 06:46:03,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-12-23 06:46:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:46:03,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:46:03,692 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:46:03,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 06:46:03,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:46:03,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:46:03,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 2 times [2020-12-23 06:46:03,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:46:03,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298226703] [2020-12-23 06:46:03,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:46:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:46:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 06:46:04,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298226703] [2020-12-23 06:46:04,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331926949] [2020-12-23 06:46:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:04,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 06:46:04,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:46:04,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:46:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:46:04,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:04,240 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 06:46:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-23 06:46:04,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 06:46:04,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2020-12-23 06:46:04,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833465667] [2020-12-23 06:46:04,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:46:04,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:46:04,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:46:04,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:46:04,297 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-12-23 06:46:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:46:04,397 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2020-12-23 06:46:04,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:46:04,398 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-12-23 06:46:04,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:46:04,398 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:46:04,399 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 06:46:04,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:46:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 06:46:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 06:46:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 06:46:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 06:46:04,401 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-12-23 06:46:04,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:46:04,401 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 06:46:04,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:46:04,401 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 06:46:04,401 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 06:46:04,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:46:04,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 06:46:04,650 INFO L189 CegarLoopUtils]: For program point L19(lines 19 21) no Hoare annotation was computed. [2020-12-23 06:46:04,650 INFO L192 CegarLoopUtils]: At program point L19-2(lines 18 23) the Hoare annotation is: true [2020-12-23 06:46:04,653 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 06:46:04,653 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 06:46:04,653 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 06:46:04,654 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2020-12-23 06:46:04,654 INFO L189 CegarLoopUtils]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-23 06:46:04,655 INFO L189 CegarLoopUtils]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2020-12-23 06:46:04,656 INFO L189 CegarLoopUtils]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2020-12-23 06:46:04,656 INFO L192 CegarLoopUtils]: At program point L37-3(lines 37 38) the Hoare annotation is: true [2020-12-23 06:46:04,656 INFO L189 CegarLoopUtils]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2020-12-23 06:46:04,656 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 06:46:04,656 INFO L189 CegarLoopUtils]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2020-12-23 06:46:04,656 INFO L192 CegarLoopUtils]: At program point L33-3(lines 33 34) the Hoare annotation is: true [2020-12-23 06:46:04,656 INFO L189 CegarLoopUtils]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2020-12-23 06:46:04,657 INFO L189 CegarLoopUtils]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2020-12-23 06:46:04,658 INFO L192 CegarLoopUtils]: At program point L46-3(lines 46 47) the Hoare annotation is: true [2020-12-23 06:46:04,658 INFO L189 CegarLoopUtils]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2020-12-23 06:46:04,659 INFO L189 CegarLoopUtils]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2020-12-23 06:46:04,659 INFO L192 CegarLoopUtils]: At program point L42-3(lines 42 43) the Hoare annotation is: true [2020-12-23 06:46:04,659 INFO L192 CegarLoopUtils]: At program point L71(lines 28 72) the Hoare annotation is: true [2020-12-23 06:46:04,659 INFO L189 CegarLoopUtils]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2020-12-23 06:46:04,659 INFO L189 CegarLoopUtils]: For program point L55(lines 55 64) no Hoare annotation was computed. [2020-12-23 06:46:04,660 INFO L192 CegarLoopUtils]: At program point L55-2(lines 53 65) the Hoare annotation is: true [2020-12-23 06:46:04,660 INFO L189 CegarLoopUtils]: For program point L39(line 39) no Hoare annotation was computed. [2020-12-23 06:46:04,660 INFO L189 CegarLoopUtils]: For program point L35(line 35) no Hoare annotation was computed. [2020-12-23 06:46:04,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:46:04 BoogieIcfgContainer [2020-12-23 06:46:04,672 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:46:04,673 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:46:04,673 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:46:04,674 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:46:04,674 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:46:02" (3/4) ... [2020-12-23 06:46:04,678 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 06:46:04,701 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-12-23 06:46:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 06:46:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:46:04,702 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 06:46:04,763 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loops/string-1.i-witness.graphml [2020-12-23 06:46:04,764 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:46:04,766 INFO L168 Benchmark]: Toolchain (without parser) took 3223.49 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 124.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 3.6 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,766 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 123.2 MB in the beginning and 123.1 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:46:04,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.54 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 116.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,768 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,769 INFO L168 Benchmark]: Boogie Preprocessor took 28.95 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,769 INFO L168 Benchmark]: RCFGBuilder took 571.86 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 129.4 MB in the end (delta: -15.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,770 INFO L168 Benchmark]: TraceAbstraction took 2130.54 ms. Allocated memory is still 151.0 MB. Free memory was 129.4 MB in the beginning and 127.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,771 INFO L168 Benchmark]: Witness Printer took 90.46 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 124.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:46:04,776 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 151.0 MB. Free memory was 123.2 MB in the beginning and 123.1 MB in the end (delta: 96.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 346.54 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 116.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 41.83 ms. Allocated memory is still 151.0 MB. Free memory was 116.7 MB in the beginning and 115.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.95 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 113.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 571.86 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 129.4 MB in the end (delta: -15.7 MB). Peak memory consumption was 15.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2130.54 ms. Allocated memory is still 151.0 MB. Free memory was 129.4 MB in the beginning and 127.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.5 MB. Max. memory is 8.0 GB. * Witness Printer took 90.46 ms. Allocated memory is still 151.0 MB. Free memory was 127.6 MB in the beginning and 124.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 20]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 53]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 30 SDslu, 94 SDs, 0 SdLazy, 72 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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, 4 MinimizatonAttempts, 22 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 130 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 3682 SizeOfPredicates, 4 NumberOfNonLiveVariables, 176 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 14/20 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 correct! Received shutdown request...