/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/memsafety/lockfree-3.1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:58:19,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:58:19,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:58:19,420 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:58:19,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:58:19,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:58:19,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:58:19,426 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:58:19,428 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:58:19,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:58:19,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:58:19,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:58:19,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:58:19,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:58:19,435 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:58:19,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:58:19,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:58:19,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:58:19,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:58:19,474 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:58:19,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:58:19,485 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:58:19,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:58:19,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:58:19,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 16:58:19,497 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 16:58:19,497 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 16:58:19,502 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 16:58:19,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 16:58:19,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 16:58:19,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:58:19,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:58:19,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:58:19,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:58:19,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:58:19,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:58:19,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:58:19,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:58:19,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:58:19,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:58:19,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:58:19,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:58:19,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:58:19,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:58:19,567 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:58:19,567 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:58:19,567 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:58:19,568 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:58:19,568 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:58:19,568 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:58:19,568 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:58:19,569 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:58:19,569 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:58:19,569 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:58:19,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:58:19,569 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:58:19,570 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:58:19,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:58:19,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:58:19,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:58:19,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:58:19,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:58:19,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:58:19,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:58:19,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:58:19,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:58:19,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:58:19,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:58:19,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:58:19,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:58:19,978 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:58:19,978 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:58:19,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-23 16:58:20,069 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c483d892/2e4a1028878f47a38a554cc589c08a05/FLAG83a4693de [2020-12-23 16:58:20,729 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:58:20,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/memsafety/lockfree-3.1.i [2020-12-23 16:58:20,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c483d892/2e4a1028878f47a38a554cc589c08a05/FLAG83a4693de [2020-12-23 16:58:21,004 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/3c483d892/2e4a1028878f47a38a554cc589c08a05 [2020-12-23 16:58:21,007 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:58:21,009 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:58:21,011 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:58:21,011 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:58:21,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:58:21,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@690b5a26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21, skipping insertion in model container [2020-12-23 16:58:21,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,026 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:58:21,071 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~x1~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]] left hand side expression in assignment: lhs: VariableLHS[~t1~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~res4~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t4~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~t4~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~garbage~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~garbage~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x4~0,GLOBAL] [2020-12-23 16:58:21,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:58:21,404 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~x1~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]] left hand side expression in assignment: lhs: VariableLHS[~t1~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~x1~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~res4~0,GLOBAL] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~t4~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~t4~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~garbage~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~pc4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~garbage~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~S~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x1~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~t4~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~x4~0,GLOBAL] [2020-12-23 16:58:21,455 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:58:21,520 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:58:21,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21 WrapperNode [2020-12-23 16:58:21,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:58:21,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:58:21,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:58:21,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:58:21,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:58:21,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:58:21,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:58:21,582 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:58:21,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,686 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... [2020-12-23 16:58:21,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:58:21,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:58:21,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:58:21,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:58:21,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:58:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:58:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:58:21,814 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:58:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 16:58:21,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:58:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 16:58:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:58:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:58:21,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:58:21,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:58:22,471 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:58:22,471 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:58:22,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:58:22 BoogieIcfgContainer [2020-12-23 16:58:22,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:58:22,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:58:22,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:58:22,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:58:22,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:58:21" (1/3) ... [2020-12-23 16:58:22,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37219eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:58:22, skipping insertion in model container [2020-12-23 16:58:22,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:58:21" (2/3) ... [2020-12-23 16:58:22,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37219eb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:58:22, skipping insertion in model container [2020-12-23 16:58:22,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:58:22" (3/3) ... [2020-12-23 16:58:22,489 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.1.i [2020-12-23 16:58:22,503 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:58:22,510 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-23 16:58:22,532 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-23 16:58:22,567 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:58:22,567 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:58:22,567 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:58:22,567 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:58:22,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:58:22,568 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:58:22,568 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:58:22,568 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:58:22,594 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-23 16:58:22,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-23 16:58:22,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:22,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-23 16:58:22,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 28817120, now seen corresponding path program 1 times [2020-12-23 16:58:22,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:22,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546241778] [2020-12-23 16:58:22,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:22,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546241778] [2020-12-23 16:58:22,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:22,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:22,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918895161] [2020-12-23 16:58:22,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 16:58:22,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 16:58:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 16:58:22,876 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2020-12-23 16:58:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:22,907 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2020-12-23 16:58:22,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 16:58:22,909 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-23 16:58:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:22,922 INFO L225 Difference]: With dead ends: 62 [2020-12-23 16:58:22,922 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 16:58:22,935 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 16:58:22,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 16:58:22,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-12-23 16:58:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:58:22,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-12-23 16:58:22,999 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 5 [2020-12-23 16:58:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:22,999 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-12-23 16:58:22,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 16:58:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2020-12-23 16:58:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:58:23,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:58:23,002 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1806850988, now seen corresponding path program 1 times [2020-12-23 16:58:23,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042035718] [2020-12-23 16:58:23,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042035718] [2020-12-23 16:58:23,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:23,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456265145] [2020-12-23 16:58:23,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:23,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:23,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:23,101 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 3 states. [2020-12-23 16:58:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,134 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2020-12-23 16:58:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:23,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:58:23,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,137 INFO L225 Difference]: With dead ends: 61 [2020-12-23 16:58:23,137 INFO L226 Difference]: Without dead ends: 61 [2020-12-23 16:58:23,138 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 16:58:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-23 16:58:23,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-12-23 16:58:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 16:58:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2020-12-23 16:58:23,148 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 7 [2020-12-23 16:58:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,148 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2020-12-23 16:58:23,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2020-12-23 16:58:23,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:58:23,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:58:23,150 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1806910570, now seen corresponding path program 1 times [2020-12-23 16:58:23,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595685050] [2020-12-23 16:58:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595685050] [2020-12-23 16:58:23,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:23,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768116690] [2020-12-23 16:58:23,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:23,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:23,207 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 3 states. [2020-12-23 16:58:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,276 INFO L93 Difference]: Finished difference Result 107 states and 141 transitions. [2020-12-23 16:58:23,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:23,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:58:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,280 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:58:23,282 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:58:23,283 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 [2020-12-23 16:58:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:58:23,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 89. [2020-12-23 16:58:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:58:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 133 transitions. [2020-12-23 16:58:23,305 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 133 transitions. Word has length 7 [2020-12-23 16:58:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,306 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 133 transitions. [2020-12-23 16:58:23,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:23,307 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 133 transitions. [2020-12-23 16:58:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:58:23,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,308 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:58:23,309 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash 177749355, now seen corresponding path program 1 times [2020-12-23 16:58:23,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144165511] [2020-12-23 16:58:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144165511] [2020-12-23 16:58:23,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:23,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341754264] [2020-12-23 16:58:23,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:23,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:23,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:23,408 INFO L87 Difference]: Start difference. First operand 89 states and 133 transitions. Second operand 4 states. [2020-12-23 16:58:23,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,468 INFO L93 Difference]: Finished difference Result 97 states and 142 transitions. [2020-12-23 16:58:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:58:23,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:58:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,470 INFO L225 Difference]: With dead ends: 97 [2020-12-23 16:58:23,471 INFO L226 Difference]: Without dead ends: 97 [2020-12-23 16:58:23,471 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 [2020-12-23 16:58:23,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-23 16:58:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-12-23 16:58:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 16:58:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 135 transitions. [2020-12-23 16:58:23,481 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 135 transitions. Word has length 8 [2020-12-23 16:58:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,482 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 135 transitions. [2020-12-23 16:58:23,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 135 transitions. [2020-12-23 16:58:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:58:23,483 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:58:23,483 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash 179651426, now seen corresponding path program 1 times [2020-12-23 16:58:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478690957] [2020-12-23 16:58:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478690957] [2020-12-23 16:58:23,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:23,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577558622] [2020-12-23 16:58:23,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:23,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:23,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:23,544 INFO L87 Difference]: Start difference. First operand 91 states and 135 transitions. Second operand 3 states. [2020-12-23 16:58:23,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,664 INFO L93 Difference]: Finished difference Result 169 states and 253 transitions. [2020-12-23 16:58:23,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:23,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 16:58:23,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,666 INFO L225 Difference]: With dead ends: 169 [2020-12-23 16:58:23,666 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 16:58:23,667 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 [2020-12-23 16:58:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 16:58:23,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 145. [2020-12-23 16:58:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 16:58:23,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 238 transitions. [2020-12-23 16:58:23,682 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 238 transitions. Word has length 8 [2020-12-23 16:58:23,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,682 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 238 transitions. [2020-12-23 16:58:23,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 238 transitions. [2020-12-23 16:58:23,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:58:23,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,684 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:58:23,684 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,685 INFO L82 PathProgramCache]: Analyzing trace with hash 179596397, now seen corresponding path program 1 times [2020-12-23 16:58:23,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288186524] [2020-12-23 16:58:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288186524] [2020-12-23 16:58:23,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:23,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066543231] [2020-12-23 16:58:23,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:23,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:23,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:23,746 INFO L87 Difference]: Start difference. First operand 145 states and 238 transitions. Second operand 3 states. [2020-12-23 16:58:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:23,829 INFO L93 Difference]: Finished difference Result 217 states and 342 transitions. [2020-12-23 16:58:23,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:23,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 16:58:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:23,833 INFO L225 Difference]: With dead ends: 217 [2020-12-23 16:58:23,833 INFO L226 Difference]: Without dead ends: 217 [2020-12-23 16:58:23,834 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 [2020-12-23 16:58:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-23 16:58:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 196. [2020-12-23 16:58:23,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 16:58:23,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 328 transitions. [2020-12-23 16:58:23,875 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 328 transitions. Word has length 8 [2020-12-23 16:58:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:23,875 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 328 transitions. [2020-12-23 16:58:23,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:23,875 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 328 transitions. [2020-12-23 16:58:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:58:23,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:23,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:23,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:58:23,880 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:23,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:23,880 INFO L82 PathProgramCache]: Analyzing trace with hash 179596398, now seen corresponding path program 1 times [2020-12-23 16:58:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:23,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128936503] [2020-12-23 16:58:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128936503] [2020-12-23 16:58:23,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:23,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:58:23,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829657453] [2020-12-23 16:58:23,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:58:23,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:23,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:58:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:58:23,939 INFO L87 Difference]: Start difference. First operand 196 states and 328 transitions. Second operand 3 states. [2020-12-23 16:58:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:24,003 INFO L93 Difference]: Finished difference Result 212 states and 333 transitions. [2020-12-23 16:58:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:58:24,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 16:58:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:24,006 INFO L225 Difference]: With dead ends: 212 [2020-12-23 16:58:24,006 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 16:58:24,006 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 [2020-12-23 16:58:24,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 16:58:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 194. [2020-12-23 16:58:24,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 16:58:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 320 transitions. [2020-12-23 16:58:24,016 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 320 transitions. Word has length 8 [2020-12-23 16:58:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:24,016 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 320 transitions. [2020-12-23 16:58:24,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:58:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 320 transitions. [2020-12-23 16:58:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:58:24,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:24,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:24,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:58:24,018 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:24,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1272529015, now seen corresponding path program 1 times [2020-12-23 16:58:24,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:24,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880622104] [2020-12-23 16:58:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880622104] [2020-12-23 16:58:24,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:24,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:24,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566698054] [2020-12-23 16:58:24,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:24,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:24,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:24,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:24,053 INFO L87 Difference]: Start difference. First operand 194 states and 320 transitions. Second operand 4 states. [2020-12-23 16:58:24,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:24,100 INFO L93 Difference]: Finished difference Result 251 states and 352 transitions. [2020-12-23 16:58:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:58:24,101 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:58:24,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:24,103 INFO L225 Difference]: With dead ends: 251 [2020-12-23 16:58:24,103 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 16:58:24,103 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 [2020-12-23 16:58:24,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 16:58:24,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 153. [2020-12-23 16:58:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 16:58:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 244 transitions. [2020-12-23 16:58:24,110 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 244 transitions. Word has length 9 [2020-12-23 16:58:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:24,110 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 244 transitions. [2020-12-23 16:58:24,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 244 transitions. [2020-12-23 16:58:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:58:24,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:24,112 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:24,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:58:24,112 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash 844095278, now seen corresponding path program 1 times [2020-12-23 16:58:24,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:24,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286906003] [2020-12-23 16:58:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286906003] [2020-12-23 16:58:24,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:58:24,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:58:24,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474518954] [2020-12-23 16:58:24,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:24,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:24,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:24,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:24,147 INFO L87 Difference]: Start difference. First operand 153 states and 244 transitions. Second operand 4 states. [2020-12-23 16:58:24,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:24,191 INFO L93 Difference]: Finished difference Result 330 states and 496 transitions. [2020-12-23 16:58:24,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:58:24,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 16:58:24,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:24,194 INFO L225 Difference]: With dead ends: 330 [2020-12-23 16:58:24,195 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 16:58:24,195 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 [2020-12-23 16:58:24,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 16:58:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 214. [2020-12-23 16:58:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-12-23 16:58:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 336 transitions. [2020-12-23 16:58:24,203 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 336 transitions. Word has length 10 [2020-12-23 16:58:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:24,203 INFO L481 AbstractCegarLoop]: Abstraction has 214 states and 336 transitions. [2020-12-23 16:58:24,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:24,204 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 336 transitions. [2020-12-23 16:58:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:58:24,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:24,205 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:24,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:58:24,205 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:24,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:24,206 INFO L82 PathProgramCache]: Analyzing trace with hash -359933169, now seen corresponding path program 1 times [2020-12-23 16:58:24,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:24,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017552527] [2020-12-23 16:58:24,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017552527] [2020-12-23 16:58:24,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112933111] [2020-12-23 16:58:24,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 16:58:24,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:24,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:24,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:58:24,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024351320] [2020-12-23 16:58:24,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:58:24,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:24,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:58:24,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:58:24,457 INFO L87 Difference]: Start difference. First operand 214 states and 336 transitions. Second operand 6 states. [2020-12-23 16:58:24,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:24,529 INFO L93 Difference]: Finished difference Result 218 states and 326 transitions. [2020-12-23 16:58:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:58:24,532 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-23 16:58:24,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:24,534 INFO L225 Difference]: With dead ends: 218 [2020-12-23 16:58:24,535 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 16:58:24,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:58:24,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 16:58:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-12-23 16:58:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 16:58:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 324 transitions. [2020-12-23 16:58:24,543 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 324 transitions. Word has length 15 [2020-12-23 16:58:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:24,543 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 324 transitions. [2020-12-23 16:58:24,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:58:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 324 transitions. [2020-12-23 16:58:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:58:24,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:24,545 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:24,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:58:24,759 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:24,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:24,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1076944598, now seen corresponding path program 1 times [2020-12-23 16:58:24,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:24,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794142016] [2020-12-23 16:58:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794142016] [2020-12-23 16:58:24,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187704425] [2020-12-23 16:58:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:24,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:58:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:24,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:24,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:58:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967284430] [2020-12-23 16:58:24,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:58:24,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:24,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:58:24,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:58:24,973 INFO L87 Difference]: Start difference. First operand 210 states and 324 transitions. Second operand 7 states. [2020-12-23 16:58:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:25,077 INFO L93 Difference]: Finished difference Result 475 states and 688 transitions. [2020-12-23 16:58:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:58:25,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 16:58:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:25,081 INFO L225 Difference]: With dead ends: 475 [2020-12-23 16:58:25,081 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 16:58:25,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:58:25,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 16:58:25,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 293. [2020-12-23 16:58:25,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-23 16:58:25,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 446 transitions. [2020-12-23 16:58:25,093 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 446 transitions. Word has length 15 [2020-12-23 16:58:25,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:25,093 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 446 transitions. [2020-12-23 16:58:25,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:58:25,093 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 446 transitions. [2020-12-23 16:58:25,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:58:25,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:25,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:25,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:25,311 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:25,312 INFO L82 PathProgramCache]: Analyzing trace with hash 549808174, now seen corresponding path program 2 times [2020-12-23 16:58:25,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:25,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939744149] [2020-12-23 16:58:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:58:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939744149] [2020-12-23 16:58:25,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669022701] [2020-12-23 16:58:25,419 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:25,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:58:25,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:58:25,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 16:58:25,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:25,560 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:58:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:25,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:25,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2020-12-23 16:58:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694944829] [2020-12-23 16:58:25,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:58:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:25,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:58:25,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:58:25,575 INFO L87 Difference]: Start difference. First operand 293 states and 446 transitions. Second operand 8 states. [2020-12-23 16:58:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:25,749 INFO L93 Difference]: Finished difference Result 475 states and 676 transitions. [2020-12-23 16:58:25,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:58:25,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-23 16:58:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:25,753 INFO L225 Difference]: With dead ends: 475 [2020-12-23 16:58:25,753 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 16:58:25,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:58:25,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 16:58:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 293. [2020-12-23 16:58:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-12-23 16:58:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 434 transitions. [2020-12-23 16:58:25,763 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 434 transitions. Word has length 20 [2020-12-23 16:58:25,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:25,764 INFO L481 AbstractCegarLoop]: Abstraction has 293 states and 434 transitions. [2020-12-23 16:58:25,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:58:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 434 transitions. [2020-12-23 16:58:25,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:58:25,765 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:25,765 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:25,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 16:58:25,979 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:25,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1068746165, now seen corresponding path program 1 times [2020-12-23 16:58:25,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:25,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030495141] [2020-12-23 16:58:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:26,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030495141] [2020-12-23 16:58:26,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452681667] [2020-12-23 16:58:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:26,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:58:26,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:26,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:26,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-12-23 16:58:26,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717206993] [2020-12-23 16:58:26,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:58:26,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:26,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:58:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:58:26,183 INFO L87 Difference]: Start difference. First operand 293 states and 434 transitions. Second operand 4 states. [2020-12-23 16:58:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:26,288 INFO L93 Difference]: Finished difference Result 848 states and 1248 transitions. [2020-12-23 16:58:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:58:26,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 16:58:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:26,293 INFO L225 Difference]: With dead ends: 848 [2020-12-23 16:58:26,293 INFO L226 Difference]: Without dead ends: 848 [2020-12-23 16:58:26,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:58:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2020-12-23 16:58:26,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 737. [2020-12-23 16:58:26,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-12-23 16:58:26,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1108 transitions. [2020-12-23 16:58:26,313 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1108 transitions. Word has length 22 [2020-12-23 16:58:26,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:26,314 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1108 transitions. [2020-12-23 16:58:26,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:58:26,314 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1108 transitions. [2020-12-23 16:58:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:58:26,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:26,315 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:26,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:26,531 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1500331496, now seen corresponding path program 1 times [2020-12-23 16:58:26,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004377193] [2020-12-23 16:58:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004377193] [2020-12-23 16:58:26,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912519308] [2020-12-23 16:58:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:26,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:58:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:58:26,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677801744] [2020-12-23 16:58:26,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:58:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:58:26,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:58:26,736 INFO L87 Difference]: Start difference. First operand 737 states and 1108 transitions. Second operand 7 states. [2020-12-23 16:58:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:26,827 INFO L93 Difference]: Finished difference Result 1279 states and 1808 transitions. [2020-12-23 16:58:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:58:26,828 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-12-23 16:58:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:26,835 INFO L225 Difference]: With dead ends: 1279 [2020-12-23 16:58:26,836 INFO L226 Difference]: Without dead ends: 1279 [2020-12-23 16:58:26,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:58:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2020-12-23 16:58:26,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1031. [2020-12-23 16:58:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2020-12-23 16:58:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1506 transitions. [2020-12-23 16:58:26,863 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1506 transitions. Word has length 25 [2020-12-23 16:58:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:26,864 INFO L481 AbstractCegarLoop]: Abstraction has 1031 states and 1506 transitions. [2020-12-23 16:58:26,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:58:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1506 transitions. [2020-12-23 16:58:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:58:26,865 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:26,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:27,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:58:27,080 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:27,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:27,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1328162967, now seen corresponding path program 1 times [2020-12-23 16:58:27,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:27,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129806789] [2020-12-23 16:58:27,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:27,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:27,143 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:58:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129806789] [2020-12-23 16:58:27,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547089597] [2020-12-23 16:58:27,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:27,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:27,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:58:27,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:27,260 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:58:27,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:58:27,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:27,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-23 16:58:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115151507] [2020-12-23 16:58:27,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:58:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:58:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:58:27,276 INFO L87 Difference]: Start difference. First operand 1031 states and 1506 transitions. Second operand 6 states. [2020-12-23 16:58:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:27,400 INFO L93 Difference]: Finished difference Result 813 states and 1115 transitions. [2020-12-23 16:58:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:58:27,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-12-23 16:58:27,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:27,405 INFO L225 Difference]: With dead ends: 813 [2020-12-23 16:58:27,405 INFO L226 Difference]: Without dead ends: 813 [2020-12-23 16:58:27,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:58:27,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2020-12-23 16:58:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 454. [2020-12-23 16:58:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-12-23 16:58:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 638 transitions. [2020-12-23 16:58:27,420 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 638 transitions. Word has length 25 [2020-12-23 16:58:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:27,421 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 638 transitions. [2020-12-23 16:58:27,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:58:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 638 transitions. [2020-12-23 16:58:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:58:27,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:27,422 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:27,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:27,636 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:27,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash -694766621, now seen corresponding path program 1 times [2020-12-23 16:58:27,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:27,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966337341] [2020-12-23 16:58:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:58:27,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966337341] [2020-12-23 16:58:27,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575851748] [2020-12-23 16:58:27,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:27,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 16:58:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:27,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:27,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-12-23 16:58:27,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23881237] [2020-12-23 16:58:27,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:58:27,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:27,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:58:27,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:58:27,907 INFO L87 Difference]: Start difference. First operand 454 states and 638 transitions. Second operand 9 states. [2020-12-23 16:58:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:28,125 INFO L93 Difference]: Finished difference Result 960 states and 1274 transitions. [2020-12-23 16:58:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:58:28,125 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-12-23 16:58:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:28,130 INFO L225 Difference]: With dead ends: 960 [2020-12-23 16:58:28,131 INFO L226 Difference]: Without dead ends: 960 [2020-12-23 16:58:28,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:58:28,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2020-12-23 16:58:28,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 590. [2020-12-23 16:58:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2020-12-23 16:58:28,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 830 transitions. [2020-12-23 16:58:28,146 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 830 transitions. Word has length 32 [2020-12-23 16:58:28,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:28,146 INFO L481 AbstractCegarLoop]: Abstraction has 590 states and 830 transitions. [2020-12-23 16:58:28,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:58:28,147 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 830 transitions. [2020-12-23 16:58:28,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 16:58:28,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:28,148 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:28,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 16:58:28,361 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:28,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:28,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1206576598, now seen corresponding path program 1 times [2020-12-23 16:58:28,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:28,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59021229] [2020-12-23 16:58:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 16:58:28,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59021229] [2020-12-23 16:58:28,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567809935] [2020-12-23 16:58:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 16:58:28,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:28,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:58:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 16:58:28,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:28,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-12-23 16:58:28,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807561081] [2020-12-23 16:58:28,627 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:58:28,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:28,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:58:28,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:58:28,628 INFO L87 Difference]: Start difference. First operand 590 states and 830 transitions. Second operand 7 states. [2020-12-23 16:58:28,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:28,777 INFO L93 Difference]: Finished difference Result 1284 states and 1760 transitions. [2020-12-23 16:58:28,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:58:28,778 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-12-23 16:58:28,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:28,785 INFO L225 Difference]: With dead ends: 1284 [2020-12-23 16:58:28,785 INFO L226 Difference]: Without dead ends: 1284 [2020-12-23 16:58:28,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:58:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2020-12-23 16:58:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 699. [2020-12-23 16:58:28,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-12-23 16:58:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 1004 transitions. [2020-12-23 16:58:28,807 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 1004 transitions. Word has length 39 [2020-12-23 16:58:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:28,807 INFO L481 AbstractCegarLoop]: Abstraction has 699 states and 1004 transitions. [2020-12-23 16:58:28,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:58:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 1004 transitions. [2020-12-23 16:58:28,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:58:28,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:28,809 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:29,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:58:29,023 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:29,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:29,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2038387385, now seen corresponding path program 1 times [2020-12-23 16:58:29,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:29,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260064501] [2020-12-23 16:58:29,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:58:29,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260064501] [2020-12-23 16:58:29,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084366220] [2020-12-23 16:58:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:29,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 16:58:29,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:58:29,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:29,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2020-12-23 16:58:29,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666253098] [2020-12-23 16:58:29,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 16:58:29,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:29,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 16:58:29,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:58:29,337 INFO L87 Difference]: Start difference. First operand 699 states and 1004 transitions. Second operand 14 states. [2020-12-23 16:58:29,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:29,972 INFO L93 Difference]: Finished difference Result 1992 states and 2633 transitions. [2020-12-23 16:58:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 16:58:29,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-12-23 16:58:29,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:29,983 INFO L225 Difference]: With dead ends: 1992 [2020-12-23 16:58:29,983 INFO L226 Difference]: Without dead ends: 1992 [2020-12-23 16:58:29,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:58:29,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2020-12-23 16:58:30,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 980. [2020-12-23 16:58:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 980 states. [2020-12-23 16:58:30,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1343 transitions. [2020-12-23 16:58:30,011 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1343 transitions. Word has length 43 [2020-12-23 16:58:30,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:30,012 INFO L481 AbstractCegarLoop]: Abstraction has 980 states and 1343 transitions. [2020-12-23 16:58:30,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 16:58:30,012 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1343 transitions. [2020-12-23 16:58:30,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 16:58:30,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:30,013 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:30,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:58:30,229 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:30,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:30,230 INFO L82 PathProgramCache]: Analyzing trace with hash -213326138, now seen corresponding path program 1 times [2020-12-23 16:58:30,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:30,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936148562] [2020-12-23 16:58:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:58:30,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936148562] [2020-12-23 16:58:30,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459717973] [2020-12-23 16:58:30,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:58:30,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 16:58:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:58:30,482 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:58:30,560 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 48 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 16:58:30,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:58:30,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-12-23 16:58:30,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022559470] [2020-12-23 16:58:30,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:58:30,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:58:30,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:58:30,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:58:30,563 INFO L87 Difference]: Start difference. First operand 980 states and 1343 transitions. Second operand 9 states. [2020-12-23 16:58:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:58:30,875 INFO L93 Difference]: Finished difference Result 2265 states and 3046 transitions. [2020-12-23 16:58:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:58:30,875 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-12-23 16:58:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:58:30,888 INFO L225 Difference]: With dead ends: 2265 [2020-12-23 16:58:30,888 INFO L226 Difference]: Without dead ends: 2265 [2020-12-23 16:58:30,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:58:30,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2020-12-23 16:58:30,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1234. [2020-12-23 16:58:30,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1234 states. [2020-12-23 16:58:30,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1736 transitions. [2020-12-23 16:58:30,923 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1736 transitions. Word has length 48 [2020-12-23 16:58:30,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:58:30,924 INFO L481 AbstractCegarLoop]: Abstraction has 1234 states and 1736 transitions. [2020-12-23 16:58:30,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:58:30,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1736 transitions. [2020-12-23 16:58:30,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:58:30,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:58:30,925 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:58:31,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:58:31,140 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:58:31,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:58:31,140 INFO L82 PathProgramCache]: Analyzing trace with hash -214544417, now seen corresponding path program 1 times [2020-12-23 16:58:31,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:58:31,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544062771] [2020-12-23 16:58:31,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:58:31,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:58:31,169 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:58:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:58:31,194 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:58:31,228 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 16:58:31,228 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 16:58:31,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 16:58:31,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:58:31 BoogieIcfgContainer [2020-12-23 16:58:31,308 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:58:31,308 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:58:31,308 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:58:31,309 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:58:31,309 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:58:22" (3/4) ... [2020-12-23 16:58:31,314 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 16:58:31,314 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:58:31,316 INFO L168 Benchmark]: Toolchain (without parser) took 10305.95 ms. Allocated memory was 152.0 MB in the beginning and 237.0 MB in the end (delta: 84.9 MB). Free memory was 126.4 MB in the beginning and 134.9 MB in the end (delta: -8.5 MB). Peak memory consumption was 77.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,316 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:58:31,317 INFO L168 Benchmark]: CACSL2BoogieTranslator took 510.57 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 103.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,317 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.48 ms. Allocated memory is still 152.0 MB. Free memory was 103.5 MB in the beginning and 101.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,318 INFO L168 Benchmark]: Boogie Preprocessor took 114.75 ms. Allocated memory is still 152.0 MB. Free memory was 101.5 MB in the beginning and 134.5 MB in the end (delta: -33.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,318 INFO L168 Benchmark]: RCFGBuilder took 780.58 ms. Allocated memory is still 152.0 MB. Free memory was 134.5 MB in the beginning and 106.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,319 INFO L168 Benchmark]: TraceAbstraction took 8829.02 ms. Allocated memory was 152.0 MB in the beginning and 237.0 MB in the end (delta: 84.9 MB). Free memory was 105.7 MB in the beginning and 134.9 MB in the end (delta: -29.2 MB). Peak memory consumption was 57.3 MB. Max. memory is 8.0 GB. [2020-12-23 16:58:31,319 INFO L168 Benchmark]: Witness Printer took 5.54 ms. Allocated memory is still 237.0 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:58:31,322 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 152.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 74.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 510.57 ms. Allocated memory is still 152.0 MB. Free memory was 126.2 MB in the beginning and 103.5 MB in the end (delta: 22.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 57.48 ms. Allocated memory is still 152.0 MB. Free memory was 103.5 MB in the beginning and 101.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 114.75 ms. Allocated memory is still 152.0 MB. Free memory was 101.5 MB in the beginning and 134.5 MB in the end (delta: -33.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 8.0 GB. * RCFGBuilder took 780.58 ms. Allocated memory is still 152.0 MB. Free memory was 134.5 MB in the beginning and 106.2 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8829.02 ms. Allocated memory was 152.0 MB in the beginning and 237.0 MB in the end (delta: 84.9 MB). Free memory was 105.7 MB in the beginning and 134.9 MB in the end (delta: -29.2 MB). Peak memory consumption was 57.3 MB. Max. memory is 8.0 GB. * Witness Printer took 5.54 ms. Allocated memory is still 237.0 MB. Free memory is still 134.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L542] x1->data = 4 VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=3, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=4, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L548] x1->next = t1 VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=5, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L551] COND TRUE S == t1 [L552] S = x1 VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=6, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND TRUE 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() [L594] 1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L594] COND FALSE !(1 != pc1 || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={-1:0}, t1={0:0}, t4={0:0}, x1={-1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 62 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.6s, OverallIterations: 20, TraceHistogramMax: 7, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2158 SDtfs, 4439 SDslu, 4860 SDs, 0 SdLazy, 870 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 470 GetRequests, 324 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1234occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 4386 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 696 NumberOfCodeBlocks, 696 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 609 ConstructedInterpolants, 0 QuantifiedInterpolants, 41568 SizeOfPredicates, 26 NumberOfNonLiveVariables, 1503 ConjunctsInSsa, 89 ConjunctsInUnsatCore, 29 InterpolantComputations, 9 PerfectInterpolantSequences, 388/524 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...