/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-MemCleanup-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/list-properties/alternating_list-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:44:18,371 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:44:18,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:44:18,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:44:18,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:44:18,438 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:44:18,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:44:18,448 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:44:18,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:44:18,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:44:18,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:44:18,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:44:18,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:44:18,470 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:44:18,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:44:18,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:44:18,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:44:18,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:44:18,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:44:18,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:44:18,499 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:44:18,501 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:44:18,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:44:18,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:44:18,530 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 16:44:18,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 16:44:18,531 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 16:44:18,533 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 16:44:18,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 16:44:18,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 16:44:18,536 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:44:18,537 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:44:18,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:44:18,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:44:18,542 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:44:18,542 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:44:18,543 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:44:18,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:44:18,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:44:18,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:44:18,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:44:18,560 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-64bit-Automizer_Default.epf [2020-12-23 16:44:18,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:44:18,609 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:44:18,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:44:18,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:44:18,615 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:44:18,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:44:18,615 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:44:18,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:44:18,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:44:18,616 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:44:18,617 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:44:18,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:44:18,617 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:44:18,618 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:44:18,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:44:18,618 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:44:18,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:44:18,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:44:18,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:44:18,619 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:44:18,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:44:18,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:44:18,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:44:18,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:44:19,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:44:19,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:44:19,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:44:19,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:44:19,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:44:19,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/alternating_list-2.i [2020-12-23 16:44:19,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f92449c2/87717ea7e3fd45eba00bea2885dfa737/FLAG2221ba36b [2020-12-23 16:44:19,857 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:44:19,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i [2020-12-23 16:44:19,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f92449c2/87717ea7e3fd45eba00bea2885dfa737/FLAG2221ba36b [2020-12-23 16:44:20,154 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/5f92449c2/87717ea7e3fd45eba00bea2885dfa737 [2020-12-23 16:44:20,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:44:20,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:44:20,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:44:20,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:44:20,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:44:20,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e7a17be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20, skipping insertion in model container [2020-12-23 16:44:20,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:44:20,216 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 16:44:20,622 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2020-12-23 16:44:20,626 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:44:20,640 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~p~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~p~0,],base],StructAccessExpression[IdentifierExpression[~p~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] left hand side expression in assignment: lhs: VariableLHS[~p~0,] [2020-12-23 16:44:20,688 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/list-properties/alternating_list-2.i[23574,23587] [2020-12-23 16:44:20,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:44:20,752 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:44:20,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20 WrapperNode [2020-12-23 16:44:20,752 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:44:20,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:44:20,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:44:20,754 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:44:20,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,807 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:44:20,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:44:20,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:44:20,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:44:20,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,823 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,823 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (1/1) ... [2020-12-23 16:44:20,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:44:20,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:44:20,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:44:20,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:44:20,884 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (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 16:44:21,006 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-23 16:44:21,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:44:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 16:44:21,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:44:21,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:44:21,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:44:21,676 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-23 16:44:21,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:44:21 BoogieIcfgContainer [2020-12-23 16:44:21,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:44:21,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:44:21,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:44:21,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:44:21,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:44:20" (1/3) ... [2020-12-23 16:44:21,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a12638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:44:21, skipping insertion in model container [2020-12-23 16:44:21,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:44:20" (2/3) ... [2020-12-23 16:44:21,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a12638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:44:21, skipping insertion in model container [2020-12-23 16:44:21,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:44:21" (3/3) ... [2020-12-23 16:44:21,689 INFO L111 eAbstractionObserver]: Analyzing ICFG alternating_list-2.i [2020-12-23 16:44:21,696 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:44:21,701 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 30 error locations. [2020-12-23 16:44:21,723 INFO L253 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2020-12-23 16:44:21,749 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:44:21,750 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:44:21,750 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:44:21,750 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:44:21,750 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:44:21,750 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:44:21,750 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:44:21,750 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:44:21,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states. [2020-12-23 16:44:21,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 16:44:21,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:21,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 16:44:21,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:21,787 INFO L82 PathProgramCache]: Analyzing trace with hash 889600296, now seen corresponding path program 1 times [2020-12-23 16:44:21,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:21,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327670912] [2020-12-23 16:44:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:21,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:21,965 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 16:44:21,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327670912] [2020-12-23 16:44:21,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:21,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:44:21,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624126583] [2020-12-23 16:44:21,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 16:44:21,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:21,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 16:44:21,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 16:44:21,995 INFO L87 Difference]: Start difference. First operand 74 states. Second operand 2 states. [2020-12-23 16:44:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:22,015 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2020-12-23 16:44:22,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 16:44:22,016 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-23 16:44:22,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:22,027 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:44:22,027 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 16:44:22,029 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 16:44:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 16:44:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-12-23 16:44:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:44:22,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-12-23 16:44:22,076 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 6 [2020-12-23 16:44:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:22,077 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-12-23 16:44:22,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 16:44:22,077 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-12-23 16:44:22,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:44:22,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:22,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:22,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:44:22,078 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:22,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769742, now seen corresponding path program 1 times [2020-12-23 16:44:22,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:22,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860037287] [2020-12-23 16:44:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:22,152 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 16:44:22,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860037287] [2020-12-23 16:44:22,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:22,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:44:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643129911] [2020-12-23 16:44:22,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:44:22,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:22,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:44:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:44:22,157 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 4 states. [2020-12-23 16:44:22,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:22,340 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2020-12-23 16:44:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:44:22,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:44:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:22,345 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:44:22,346 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:44:22,347 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 16:44:22,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:44:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 71. [2020-12-23 16:44:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 16:44:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-12-23 16:44:22,371 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 7 [2020-12-23 16:44:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:22,372 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-12-23 16:44:22,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:44:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-12-23 16:44:22,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:44:22,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:22,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:22,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:44:22,375 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:22,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:22,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1807769743, now seen corresponding path program 1 times [2020-12-23 16:44:22,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:22,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993935804] [2020-12-23 16:44:22,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:22,456 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 16:44:22,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993935804] [2020-12-23 16:44:22,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:22,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:44:22,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216952951] [2020-12-23 16:44:22,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:44:22,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:22,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:44:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:44:22,459 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 4 states. [2020-12-23 16:44:22,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:22,637 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2020-12-23 16:44:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:44:22,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:44:22,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:22,639 INFO L225 Difference]: With dead ends: 99 [2020-12-23 16:44:22,639 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:44:22,640 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 16:44:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:44:22,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2020-12-23 16:44:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:44:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-12-23 16:44:22,648 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 7 [2020-12-23 16:44:22,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:22,649 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-12-23 16:44:22,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:44:22,649 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-12-23 16:44:22,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:44:22,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:22,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:22,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:44:22,651 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:22,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2106443233, now seen corresponding path program 1 times [2020-12-23 16:44:22,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:22,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432196640] [2020-12-23 16:44:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:22,693 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 16:44:22,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432196640] [2020-12-23 16:44:22,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:22,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:44:22,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841122376] [2020-12-23 16:44:22,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:44:22,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:44:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:44:22,696 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 3 states. [2020-12-23 16:44:22,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:22,712 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-12-23 16:44:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:44:22,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-23 16:44:22,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:22,714 INFO L225 Difference]: With dead ends: 136 [2020-12-23 16:44:22,714 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 16:44:22,715 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 16:44:22,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 16:44:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2020-12-23 16:44:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:44:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2020-12-23 16:44:22,724 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 14 [2020-12-23 16:44:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:22,724 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2020-12-23 16:44:22,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:44:22,725 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2020-12-23 16:44:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:44:22,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:22,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:22,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:44:22,726 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:22,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:22,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2106751063, now seen corresponding path program 1 times [2020-12-23 16:44:22,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:22,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540801542] [2020-12-23 16:44:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:22,788 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 16:44:22,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540801542] [2020-12-23 16:44:22,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:22,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:44:22,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576529783] [2020-12-23 16:44:22,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:44:22,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:22,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:44:22,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:44:22,791 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand 6 states. [2020-12-23 16:44:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:22,983 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2020-12-23 16:44:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:44:22,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-23 16:44:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:22,991 INFO L225 Difference]: With dead ends: 141 [2020-12-23 16:44:22,991 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 16:44:22,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:44:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 16:44:23,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 99. [2020-12-23 16:44:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 16:44:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2020-12-23 16:44:23,021 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 14 [2020-12-23 16:44:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:23,021 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2020-12-23 16:44:23,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:44:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2020-12-23 16:44:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:44:23,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:23,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:23,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:44:23,023 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash -916143496, now seen corresponding path program 1 times [2020-12-23 16:44:23,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:23,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006092101] [2020-12-23 16:44:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:23,143 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 16:44:23,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006092101] [2020-12-23 16:44:23,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:23,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:44:23,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456371598] [2020-12-23 16:44:23,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:44:23,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:23,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:44:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:44:23,147 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand 4 states. [2020-12-23 16:44:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:23,252 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2020-12-23 16:44:23,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:44:23,253 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 16:44:23,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:23,254 INFO L225 Difference]: With dead ends: 106 [2020-12-23 16:44:23,254 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 16:44:23,254 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 16:44:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 16:44:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-12-23 16:44:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 16:44:23,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2020-12-23 16:44:23,274 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 15 [2020-12-23 16:44:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:23,275 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2020-12-23 16:44:23,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:44:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2020-12-23 16:44:23,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:44:23,280 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:23,280 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:23,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:44:23,282 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:23,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:23,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1664368567, now seen corresponding path program 1 times [2020-12-23 16:44:23,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:23,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896325616] [2020-12-23 16:44:23,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:23,392 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 16:44:23,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896325616] [2020-12-23 16:44:23,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:23,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:44:23,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559690363] [2020-12-23 16:44:23,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:44:23,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:23,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:44:23,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:44:23,397 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand 7 states. [2020-12-23 16:44:23,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:23,665 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2020-12-23 16:44:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:44:23,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 16:44:23,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:23,667 INFO L225 Difference]: With dead ends: 116 [2020-12-23 16:44:23,667 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 16:44:23,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:44:23,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 16:44:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 103. [2020-12-23 16:44:23,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 16:44:23,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2020-12-23 16:44:23,672 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 16 [2020-12-23 16:44:23,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:23,673 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2020-12-23 16:44:23,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:44:23,673 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2020-12-23 16:44:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:44:23,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:23,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:23,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:44:23,675 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:23,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:23,676 INFO L82 PathProgramCache]: Analyzing trace with hash 54401118, now seen corresponding path program 1 times [2020-12-23 16:44:23,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:23,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414983676] [2020-12-23 16:44:23,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:23,751 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 16:44:23,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414983676] [2020-12-23 16:44:23,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:23,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:44:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100633907] [2020-12-23 16:44:23,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:44:23,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:23,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:44:23,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:44:23,754 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand 5 states. [2020-12-23 16:44:23,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:23,935 INFO L93 Difference]: Finished difference Result 110 states and 125 transitions. [2020-12-23 16:44:23,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:44:23,936 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 16:44:23,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:23,937 INFO L225 Difference]: With dead ends: 110 [2020-12-23 16:44:23,938 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:44:23,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:44:23,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:44:23,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-12-23 16:44:23,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 16:44:23,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2020-12-23 16:44:23,943 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 17 [2020-12-23 16:44:23,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:23,944 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2020-12-23 16:44:23,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:44:23,944 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2020-12-23 16:44:23,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:44:23,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:23,945 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:23,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:44:23,945 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1609090789, now seen corresponding path program 1 times [2020-12-23 16:44:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:23,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603694124] [2020-12-23 16:44:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:44:23,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603694124] [2020-12-23 16:44:23,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:23,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:44:23,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636785334] [2020-12-23 16:44:23,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:44:23,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:24,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:44:24,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:44:24,001 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 6 states. [2020-12-23 16:44:24,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:24,161 INFO L93 Difference]: Finished difference Result 104 states and 119 transitions. [2020-12-23 16:44:24,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:44:24,161 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 16:44:24,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:24,162 INFO L225 Difference]: With dead ends: 104 [2020-12-23 16:44:24,163 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 16:44:24,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:44:24,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 16:44:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-12-23 16:44:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:44:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2020-12-23 16:44:24,167 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 17 [2020-12-23 16:44:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:24,167 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2020-12-23 16:44:24,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:44:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2020-12-23 16:44:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:44:24,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:24,168 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:24,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:44:24,169 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1609090788, now seen corresponding path program 1 times [2020-12-23 16:44:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:24,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095202385] [2020-12-23 16:44:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:24,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:44:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:44:24,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095202385] [2020-12-23 16:44:24,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:44:24,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:44:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349860906] [2020-12-23 16:44:24,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:44:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:44:24,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:44:24,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:44:24,251 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand 6 states. [2020-12-23 16:44:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:44:24,487 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2020-12-23 16:44:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:44:24,488 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 16:44:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:44:24,489 INFO L225 Difference]: With dead ends: 92 [2020-12-23 16:44:24,489 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 16:44:24,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:44:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 16:44:24,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-12-23 16:44:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 16:44:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-12-23 16:44:24,493 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 17 [2020-12-23 16:44:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:44:24,493 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-12-23 16:44:24,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:44:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-12-23 16:44:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:44:24,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:44:24,494 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:44:24,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:44:24,495 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:44:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:44:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash 372860540, now seen corresponding path program 1 times [2020-12-23 16:44:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:44:24,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708507312] [2020-12-23 16:44:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:44:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:44:24,530 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:44:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 16:44:24,564 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 16:44:24,616 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 16:44:24,617 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 16:44:24,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:44:24,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 04:44:24 BoogieIcfgContainer [2020-12-23 16:44:24,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 16:44:24,685 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 16:44:24,685 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 16:44:24,686 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 16:44:24,686 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:44:21" (3/4) ... [2020-12-23 16:44:24,689 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-23 16:44:24,743 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/list-properties/alternating_list-2.i-witness.graphml [2020-12-23 16:44:24,743 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 16:44:24,746 INFO L168 Benchmark]: Toolchain (without parser) took 4584.25 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 131.3 MB in the beginning and 142.9 MB in the end (delta: -11.6 MB). Peak memory consumption was 20.7 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,746 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 157.3 MB. Free memory is still 131.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 16:44:24,747 INFO L168 Benchmark]: CACSL2BoogieTranslator took 590.32 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 108.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,747 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.21 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 107.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,750 INFO L168 Benchmark]: Boogie Preprocessor took 70.68 ms. Allocated memory is still 157.3 MB. Free memory was 107.0 MB in the beginning and 140.2 MB in the end (delta: -33.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,751 INFO L168 Benchmark]: RCFGBuilder took 800.06 ms. Allocated memory is still 157.3 MB. Free memory was 140.2 MB in the beginning and 113.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,752 INFO L168 Benchmark]: TraceAbstraction took 3004.19 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 113.3 MB in the beginning and 145.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 259.1 kB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,752 INFO L168 Benchmark]: Witness Printer took 58.25 ms. Allocated memory is still 188.7 MB. Free memory was 145.5 MB in the beginning and 142.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 16:44:24,761 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 157.3 MB. Free memory is still 131.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 590.32 ms. Allocated memory is still 157.3 MB. Free memory was 131.2 MB in the beginning and 108.9 MB in the end (delta: 22.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 53.21 ms. Allocated memory is still 157.3 MB. Free memory was 108.9 MB in the beginning and 107.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.68 ms. Allocated memory is still 157.3 MB. Free memory was 107.0 MB in the beginning and 140.2 MB in the end (delta: -33.2 MB). Peak memory consumption was 4.8 MB. Max. memory is 8.0 GB. * RCFGBuilder took 800.06 ms. Allocated memory is still 157.3 MB. Free memory was 140.2 MB in the beginning and 113.8 MB in the end (delta: 26.4 MB). Peak memory consumption was 26.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3004.19 ms. Allocated memory was 157.3 MB in the beginning and 188.7 MB in the end (delta: 31.5 MB). Free memory was 113.3 MB in the beginning and 145.5 MB in the end (delta: -32.2 MB). Peak memory consumption was 259.1 kB. Max. memory is 8.0 GB. * Witness Printer took 58.25 ms. Allocated memory is still 188.7 MB. Free memory was 145.5 MB in the beginning and 142.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 573]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L532] int flag = 1; [L533] List a = (List) malloc(sizeof(struct node)); [L534] COND FALSE !(a == 0) [L535] List t; [L536] List p = a; [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND TRUE \read(flag) [L539] p->h = 2 [L540] flag = 0 [L545] t = (List) malloc(sizeof(struct node)) [L546] COND FALSE !(t == 0) [L547] p->n = t [L548] EXPR p->n [L548] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] flag = 1 [L553] EXPR p->h [L553] COND TRUE p->h != 3 [L554] COND TRUE \read(flag) [L555] flag = 0 [L556] EXPR p->h [L556] COND TRUE p->h != 1 [L573] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 74 locations, 30 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 522 SDtfs, 714 SDslu, 750 SDs, 0 SdLazy, 879 SolverSat, 102 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 149 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 6380 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...