/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:53:26,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:53:26,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:53:26,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:53:26,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:53:26,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:53:26,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:53:26,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:53:26,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:53:26,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:53:26,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:53:26,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:53:26,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:53:26,640 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:53:26,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:53:26,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:53:26,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:53:26,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:53:26,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:53:26,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:53:26,668 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:53:26,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:53:26,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:53:26,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:53:26,676 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:53:26,680 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:53:26,681 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:53:26,682 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:53:26,683 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:53:26,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:53:26,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:53:26,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:53:26,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:53:26,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:53:26,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:53:26,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:53:26,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:53:26,721 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:53:26,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:53:26,723 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:53:26,724 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:53:26,724 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:53:26,724 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:53:26,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:53:26,725 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:53:26,725 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:53:26,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:53:26,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:53:26,726 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:53:26,726 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:53:26,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:53:26,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:53:26,726 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:53:26,727 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:53:26,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:53:26,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:53:26,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:53:26,728 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:53:26,728 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:53:26,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:53:26,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:53:26,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:53:26,729 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:53:27,152 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:53:27,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:53:27,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:53:27,189 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:53:27,189 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:53:27,191 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2020-12-22 23:53:27,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/284b76c99/ec40175889544ba5aa7d83a288320f01/FLAGc46014804 [2020-12-22 23:53:27,999 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:53:28,000 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2020-12-22 23:53:28,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/284b76c99/ec40175889544ba5aa7d83a288320f01/FLAGc46014804 [2020-12-22 23:53:28,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/284b76c99/ec40175889544ba5aa7d83a288320f01 [2020-12-22 23:53:28,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:53:28,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:53:28,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:53:28,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:53:28,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:53:28,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34938cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28, skipping insertion in model container [2020-12-22 23:53:28,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:53:28,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:53:28,652 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/array-examples/standard_copy7_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:53:28,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:53:28,699 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:53:28,714 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/array-examples/standard_copy7_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:53:28,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:53:28,755 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:53:28,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28 WrapperNode [2020-12-22 23:53:28,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:53:28,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:53:28,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:53:28,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:53:28,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,810 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:53:28,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:53:28,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:53:28,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:53:28,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,829 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,837 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... [2020-12-22 23:53:28,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:53:28,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:53:28,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:53:28,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:53:28,851 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:53:28,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:53:28,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:53:28,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:53:29,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:53:29,454 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 23:53:29,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:29 BoogieIcfgContainer [2020-12-22 23:53:29,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:53:29,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:53:29,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:53:29,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:53:29,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:53:28" (1/3) ... [2020-12-22 23:53:29,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a556eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:29, skipping insertion in model container [2020-12-22 23:53:29,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:28" (2/3) ... [2020-12-22 23:53:29,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a556eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:29, skipping insertion in model container [2020-12-22 23:53:29,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:29" (3/3) ... [2020-12-22 23:53:29,471 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-12-22 23:53:29,479 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:53:29,485 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:53:29,505 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:53:29,556 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:53:29,556 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:53:29,556 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:53:29,556 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:53:29,557 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:53:29,557 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:53:29,557 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:53:29,557 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:53:29,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-12-22 23:53:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:53:29,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:29,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:29,586 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2020-12-22 23:53:29,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:29,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728401313] [2020-12-22 23:53:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:53:29,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728401313] [2020-12-22 23:53:29,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:53:29,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:53:29,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416530482] [2020-12-22 23:53:29,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:29,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:29,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:29,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:53:29,857 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-12-22 23:53:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:29,904 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2020-12-22 23:53:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:29,909 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 23:53:29,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:29,931 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:53:29,931 INFO L226 Difference]: Without dead ends: 34 [2020-12-22 23:53:29,935 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 [2020-12-22 23:53:29,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-22 23:53:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-22 23:53:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-22 23:53:29,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2020-12-22 23:53:29,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2020-12-22 23:53:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:29,997 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2020-12-22 23:53:29,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2020-12-22 23:53:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 23:53:30,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:30,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:30,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:53:30,002 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2020-12-22 23:53:30,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:30,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691550823] [2020-12-22 23:53:30,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:30,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 23:53:30,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691550823] [2020-12-22 23:53:30,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373815484] [2020-12-22 23:53:30,176 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 [2020-12-22 23:53:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:30,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:53:30,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:30,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 23:53:30,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:53:30,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:53:30,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083404105] [2020-12-22 23:53:30,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:30,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:30,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:30,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:30,407 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2020-12-22 23:53:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:30,614 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2020-12-22 23:53:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:30,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-22 23:53:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:30,616 INFO L225 Difference]: With dead ends: 72 [2020-12-22 23:53:30,616 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 23:53:30,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 23:53:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-12-22 23:53:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 23:53:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-12-22 23:53:30,626 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2020-12-22 23:53:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:30,627 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-12-22 23:53:30,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:30,627 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-12-22 23:53:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 23:53:30,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:30,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:30,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:53:30,843 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:30,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2020-12-22 23:53:30,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:30,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444540906] [2020-12-22 23:53:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:30,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:53:30,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444540906] [2020-12-22 23:53:30,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104794529] [2020-12-22 23:53:30,905 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 [2020-12-22 23:53:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:53:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 23:53:31,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:31,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:53:31,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361934176] [2020-12-22 23:53:31,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:53:31,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:31,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:53:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:31,094 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-12-22 23:53:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:31,144 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-12-22 23:53:31,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:53:31,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2020-12-22 23:53:31,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:31,149 INFO L225 Difference]: With dead ends: 78 [2020-12-22 23:53:31,149 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 23:53:31,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:31,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 23:53:31,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-12-22 23:53:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 23:53:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-12-22 23:53:31,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 37 [2020-12-22 23:53:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:31,166 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-12-22 23:53:31,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:53:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-12-22 23:53:31,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-22 23:53:31,168 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:31,168 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:31,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:31,370 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:31,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:31,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1173005543, now seen corresponding path program 2 times [2020-12-22 23:53:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:31,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908955555] [2020-12-22 23:53:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:31,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:53:31,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908955555] [2020-12-22 23:53:31,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667259049] [2020-12-22 23:53:31,436 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 [2020-12-22 23:53:31,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:31,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:31,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:53:31,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-22 23:53:31,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:31,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:53:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560747245] [2020-12-22 23:53:31,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:53:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:31,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:53:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:31,590 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2020-12-22 23:53:31,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:31,722 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2020-12-22 23:53:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:53:31,722 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-12-22 23:53:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:31,724 INFO L225 Difference]: With dead ends: 94 [2020-12-22 23:53:31,724 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 23:53:31,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:31,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 23:53:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2020-12-22 23:53:31,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 23:53:31,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-22 23:53:31,733 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 39 [2020-12-22 23:53:31,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:31,733 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-22 23:53:31,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:53:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-22 23:53:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-22 23:53:31,735 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:31,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:31,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:31,951 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1514760601, now seen corresponding path program 3 times [2020-12-22 23:53:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:31,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19248412] [2020-12-22 23:53:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 23:53:32,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19248412] [2020-12-22 23:53:32,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654721909] [2020-12-22 23:53:32,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-22 23:53:32,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:53:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:53:32,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 23:53:32,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:32,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 23:53:32,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824021468] [2020-12-22 23:53:32,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:53:32,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:32,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:53:32,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:53:32,313 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2020-12-22 23:53:32,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:32,509 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2020-12-22 23:53:32,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 23:53:32,510 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2020-12-22 23:53:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:32,511 INFO L225 Difference]: With dead ends: 129 [2020-12-22 23:53:32,511 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 23:53:32,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:53:32,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 23:53:32,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-12-22 23:53:32,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:53:32,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-12-22 23:53:32,522 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 53 [2020-12-22 23:53:32,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:32,523 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-12-22 23:53:32,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:53:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-12-22 23:53:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:53:32,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:32,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:32,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:32,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:32,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563127, now seen corresponding path program 4 times [2020-12-22 23:53:32,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:32,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057544125] [2020-12-22 23:53:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:32,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:53:32,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057544125] [2020-12-22 23:53:32,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803879628] [2020-12-22 23:53:32,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2020-12-22 23:53:32,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:32,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:32,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:53:33,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:53:33,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:33,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 23:53:33,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123808558] [2020-12-22 23:53:33,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:53:33,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:33,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:53:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:53:33,064 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 7 states. [2020-12-22 23:53:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:33,089 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2020-12-22 23:53:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 23:53:33,090 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-12-22 23:53:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:33,091 INFO L225 Difference]: With dead ends: 138 [2020-12-22 23:53:33,091 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 23:53:33,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:53:33,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 23:53:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2020-12-22 23:53:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 23:53:33,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-12-22 23:53:33,100 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 69 [2020-12-22 23:53:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:33,100 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-12-22 23:53:33,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:53:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-12-22 23:53:33,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 23:53:33,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:33,102 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:33,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:53:33,318 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash -735797561, now seen corresponding path program 5 times [2020-12-22 23:53:33,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:33,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24151802] [2020-12-22 23:53:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-12-22 23:53:33,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24151802] [2020-12-22 23:53:33,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645029931] [2020-12-22 23:53:33,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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