/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_copy5_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:52:57,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:52:57,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:52:57,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:52:57,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:52:57,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:52:57,168 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:52:57,172 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:52:57,174 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:52:57,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:52:57,178 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:52:57,180 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:52:57,180 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:52:57,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:52:57,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:52:57,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:52:57,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:52:57,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:52:57,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:52:57,211 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:52:57,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:52:57,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:52:57,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:52:57,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:52:57,225 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:52:57,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:52:57,233 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:52:57,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:52:57,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:52:57,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:52:57,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:52:57,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:52:57,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:52:57,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:52:57,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:52:57,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:52:57,245 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 23:52:57,308 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:52:57,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:52:57,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:52:57,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:52:57,317 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:52:57,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:52:57,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:52:57,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:52:57,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:52:57,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:52:57,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:52:57,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:52:57,320 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:52:57,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:52:57,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:52:57,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:52:57,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:52:57,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:52:57,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:52:57,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:52:57,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:52:57,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:52:57,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:52:57,323 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:52:57,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:52:57,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:52:57,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:52:57,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:52:57,968 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:52:57,970 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:52:57,979 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:52:57,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2020-12-22 23:52:58,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e39b10bce/40118406413f43548cf3225cde194b14/FLAG41159f480 [2020-12-22 23:52:59,287 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:52:59,288 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy5_ground-2.i [2020-12-22 23:52:59,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e39b10bce/40118406413f43548cf3225cde194b14/FLAG41159f480 [2020-12-22 23:52:59,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/e39b10bce/40118406413f43548cf3225cde194b14 [2020-12-22 23:52:59,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:52:59,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:52:59,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:59,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:52:59,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:52:59,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b5aa89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59, skipping insertion in model container [2020-12-22 23:52:59,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:52:59,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:52:59,630 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_copy5_ground-2.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[~a5~0,],[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[~a6~0,],[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[~x~0,] [2020-12-22 23:52:59,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:59,692 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:52:59,716 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_copy5_ground-2.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[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],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[~#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[~#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[~x~0,] [2020-12-22 23:52:59,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:52:59,797 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:52:59,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59 WrapperNode [2020-12-22 23:52:59,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:52:59,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:59,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:52:59,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:52:59,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,867 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:52:59,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:52:59,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:52:59,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:52:59,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,916 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (1/1) ... [2020-12-22 23:52:59,920 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:52:59,922 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:52:59,922 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:52:59,922 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:52:59,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (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 23:53:00,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:53:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:53:00,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:53:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:53:00,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:53:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:53:00,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:53:00,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:53:00,770 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 23:53:00,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:00 BoogieIcfgContainer [2020-12-22 23:53:00,774 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:53:00,781 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:53:00,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:53:00,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:53:00,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:59" (1/3) ... [2020-12-22 23:53:00,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54606143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:00, skipping insertion in model container [2020-12-22 23:53:00,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:59" (2/3) ... [2020-12-22 23:53:00,798 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54606143 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:00, skipping insertion in model container [2020-12-22 23:53:00,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:00" (3/3) ... [2020-12-22 23:53:00,801 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy5_ground-2.i [2020-12-22 23:53:00,812 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:53:00,821 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:53:00,857 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:53:00,898 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:53:00,899 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:53:00,899 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:53:00,899 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:53:00,899 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:53:00,899 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:53:00,900 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:53:00,900 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:53:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-12-22 23:53:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 23:53:00,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:00,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:00,944 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash -18882701, now seen corresponding path program 1 times [2020-12-22 23:53:00,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:00,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710082679] [2020-12-22 23:53:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:01,281 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 23:53:01,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710082679] [2020-12-22 23:53:01,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:53:01,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:53:01,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091406506] [2020-12-22 23:53:01,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:01,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:01,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:01,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:53:01,319 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-12-22 23:53:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:01,388 INFO L93 Difference]: Finished difference Result 58 states and 86 transitions. [2020-12-22 23:53:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:01,393 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-22 23:53:01,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:01,410 INFO L225 Difference]: With dead ends: 58 [2020-12-22 23:53:01,411 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 23:53:01,417 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 23:53:01,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 23:53:01,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-22 23:53:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 23:53:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2020-12-22 23:53:01,475 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2020-12-22 23:53:01,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:01,476 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2020-12-22 23:53:01,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:01,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2020-12-22 23:53:01,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:53:01,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:01,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:01,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:53:01,479 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:01,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:01,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1592499797, now seen corresponding path program 1 times [2020-12-22 23:53:01,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:01,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298715138] [2020-12-22 23:53:01,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:01,585 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 23:53:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298715138] [2020-12-22 23:53:01,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562450626] [2020-12-22 23:53:01,587 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 23:53:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:01,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:53:01,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:01,782 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 23:53:01,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:53:01,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:53:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188496316] [2020-12-22 23:53:01,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:01,796 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 3 states. [2020-12-22 23:53:01,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:01,921 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-12-22 23:53:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:01,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 23:53:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:01,925 INFO L225 Difference]: With dead ends: 56 [2020-12-22 23:53:01,925 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 23:53:01,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 23:53:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 23:53:01,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-12-22 23:53:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 23:53:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-22 23:53:01,938 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2020-12-22 23:53:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:01,939 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-22 23:53:01,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:01,939 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-22 23:53:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 23:53:01,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:01,941 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] [2020-12-22 23:53:02,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:53:02,157 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:02,159 INFO L82 PathProgramCache]: Analyzing trace with hash 722749857, now seen corresponding path program 1 times [2020-12-22 23:53:02,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:02,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815020992] [2020-12-22 23:53:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:02,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:53:02,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815020992] [2020-12-22 23:53:02,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291155301] [2020-12-22 23:53:02,256 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 23:53:02,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:02,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:53:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:53:02,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:02,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:53:02,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771817209] [2020-12-22 23:53:02,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:53:02,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:02,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:53:02,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:02,518 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 5 states. [2020-12-22 23:53:02,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:02,590 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-12-22 23:53:02,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:53:02,594 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 23:53:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:02,596 INFO L225 Difference]: With dead ends: 62 [2020-12-22 23:53:02,597 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 23:53:02,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 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 23:53:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 23:53:02,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-12-22 23:53:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 23:53:02,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-12-22 23:53:02,626 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2020-12-22 23:53:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:02,626 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-12-22 23:53:02,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:53:02,627 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-12-22 23:53:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 23:53:02,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:02,632 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] [2020-12-22 23:53:02,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:02,834 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:02,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:02,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1187353633, now seen corresponding path program 2 times [2020-12-22 23:53:02,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:02,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142158746] [2020-12-22 23:53:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 23:53:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142158746] [2020-12-22 23:53:02,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915964808] [2020-12-22 23:53:02,953 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 23:53:03,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:03,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:53:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:03,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 23:53:03,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:03,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:53:03,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489773001] [2020-12-22 23:53:03,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:53:03,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:03,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:53:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:53:03,224 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2020-12-22 23:53:03,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:03,428 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-12-22 23:53:03,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:53:03,428 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-22 23:53:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:03,430 INFO L225 Difference]: With dead ends: 79 [2020-12-22 23:53:03,430 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 23:53:03,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:53:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 23:53:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-12-22 23:53:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 23:53:03,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-12-22 23:53:03,443 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 31 [2020-12-22 23:53:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:03,443 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-12-22 23:53:03,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:53:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-12-22 23:53:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 23:53:03,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:03,446 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 23:53:03,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:03,660 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:03,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:03,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1347184621, now seen corresponding path program 3 times [2020-12-22 23:53:03,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:03,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002449909] [2020-12-22 23:53:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:03,850 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 23:53:03,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002449909] [2020-12-22 23:53:03,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586988068] [2020-12-22 23:53:03,852 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 23:53:03,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:53:03,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:03,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:53:03,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 23:53:04,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:04,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 23:53:04,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678627811] [2020-12-22 23:53:04,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:53:04,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:04,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:53:04,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:53:04,041 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-12-22 23:53:04,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:04,257 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-22 23:53:04,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:53:04,258 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-12-22 23:53:04,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:04,260 INFO L225 Difference]: With dead ends: 101 [2020-12-22 23:53:04,260 INFO L226 Difference]: Without dead ends: 64 [2020-12-22 23:53:04,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:53:04,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-22 23:53:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-12-22 23:53:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 23:53:04,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2020-12-22 23:53:04,272 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 43 [2020-12-22 23:53:04,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:04,273 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2020-12-22 23:53:04,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:53:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2020-12-22 23:53:04,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-22 23:53:04,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:04,276 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 23:53:04,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:04,491 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash 604038727, now seen corresponding path program 4 times [2020-12-22 23:53:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:04,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620580810] [2020-12-22 23:53:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:04,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 23:53:04,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620580810] [2020-12-22 23:53:04,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128905972] [2020-12-22 23:53:04,696 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 23:53:04,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:53:04,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 23:53:04,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:04,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:53:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722002329] [2020-12-22 23:53:04,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:53:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:04,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:53:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:53:04,879 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand 8 states. [2020-12-22 23:53:04,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:04,921 INFO L93 Difference]: Finished difference Result 108 states and 120 transitions. [2020-12-22 23:53:04,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:53:04,922 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-12-22 23:53:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:04,923 INFO L225 Difference]: With dead ends: 108 [2020-12-22 23:53:04,924 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 23:53:04,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:53:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 23:53:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2020-12-22 23:53:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 23:53:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-12-22 23:53:04,934 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 55 [2020-12-22 23:53:04,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:04,934 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-12-22 23:53:04,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:53:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-12-22 23:53:04,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 23:53:04,936 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:04,937 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 23:53:05,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:53:05,149 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:05,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1417844485, now seen corresponding path program 5 times [2020-12-22 23:53:05,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:05,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467703114] [2020-12-22 23:53:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-22 23:53:05,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467703114] [2020-12-22 23:53:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107906694] [2020-12-22 23:53:05,274 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 [2020-12-22 23:53:15,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:53:15,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:15,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:53:15,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:15,260 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-22 23:53:15,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:15,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:53:15,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43333133] [2020-12-22 23:53:15,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:53:15,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:15,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:53:15,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:15,263 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 12 states. [2020-12-22 23:53:15,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:15,466 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-12-22 23:53:15,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:53:15,467 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-12-22 23:53:15,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:15,468 INFO L225 Difference]: With dead ends: 125 [2020-12-22 23:53:15,468 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 23:53:15,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:15,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 23:53:15,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2020-12-22 23:53:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 23:53:15,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-12-22 23:53:15,477 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 57 [2020-12-22 23:53:15,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:15,478 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-12-22 23:53:15,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:53:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-12-22 23:53:15,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 23:53:15,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:15,480 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:15,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:15,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:15,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:15,695 INFO L82 PathProgramCache]: Analyzing trace with hash -371467719, now seen corresponding path program 6 times [2020-12-22 23:53:15,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:15,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281800821] [2020-12-22 23:53:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-12-22 23:53:15,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281800821] [2020-12-22 23:53:15,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368620192] [2020-12-22 23:53:15,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:16,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:53:16,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:16,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:53:16,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-12-22 23:53:16,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:16,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-22 23:53:16,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214437788] [2020-12-22 23:53:16,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:53:16,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:16,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:53:16,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:53:16,623 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 14 states. [2020-12-22 23:53:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:16,837 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-12-22 23:53:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:53:16,837 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2020-12-22 23:53:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:16,838 INFO L225 Difference]: With dead ends: 147 [2020-12-22 23:53:16,838 INFO L226 Difference]: Without dead ends: 90 [2020-12-22 23:53:16,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:53:16,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-22 23:53:16,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-12-22 23:53:16,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 23:53:16,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-12-22 23:53:16,848 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 69 [2020-12-22 23:53:16,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:16,849 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-12-22 23:53:16,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:53:16,849 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-12-22 23:53:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 23:53:16,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:16,853 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:17,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:17,067 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:17,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:17,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2082029715, now seen corresponding path program 7 times [2020-12-22 23:53:17,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:17,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86769913] [2020-12-22 23:53:17,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:17,309 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:53:17,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86769913] [2020-12-22 23:53:17,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960537956] [2020-12-22 23:53:17,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:17,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:53:17,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:17,504 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:53:17,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:17,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:53:17,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86963413] [2020-12-22 23:53:17,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:53:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:53:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:53:17,507 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 11 states. [2020-12-22 23:53:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:17,554 INFO L93 Difference]: Finished difference Result 154 states and 166 transitions. [2020-12-22 23:53:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:53:17,555 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 81 [2020-12-22 23:53:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:17,556 INFO L225 Difference]: With dead ends: 154 [2020-12-22 23:53:17,556 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 23:53:17,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:53:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 23:53:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2020-12-22 23:53:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 23:53:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-12-22 23:53:17,566 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 81 [2020-12-22 23:53:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:17,566 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-12-22 23:53:17,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:53:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-12-22 23:53:17,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 23:53:17,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:17,568 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:17,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:53:17,783 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1792466603, now seen corresponding path program 8 times [2020-12-22 23:53:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618900168] [2020-12-22 23:53:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:17,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:53:17,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618900168] [2020-12-22 23:53:17,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605544402] [2020-12-22 23:53:17,922 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:18,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:18,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:18,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:53:18,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:53:18,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:18,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:53:18,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374155962] [2020-12-22 23:53:18,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:53:18,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:53:18,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:18,186 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand 12 states. [2020-12-22 23:53:18,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:18,240 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2020-12-22 23:53:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:53:18,241 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-12-22 23:53:18,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:18,242 INFO L225 Difference]: With dead ends: 156 [2020-12-22 23:53:18,242 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:53:18,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:53:18,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2020-12-22 23:53:18,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 23:53:18,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2020-12-22 23:53:18,250 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 83 [2020-12-22 23:53:18,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:18,251 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2020-12-22 23:53:18,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:53:18,251 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2020-12-22 23:53:18,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-22 23:53:18,252 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:18,252 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:18,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:18,467 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1446782569, now seen corresponding path program 9 times [2020-12-22 23:53:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:18,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519831003] [2020-12-22 23:53:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 23:53:18,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519831003] [2020-12-22 23:53:18,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718579175] [2020-12-22 23:53:18,652 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:20,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:53:20,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:53:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:20,342 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2020-12-22 23:53:20,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:20,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-22 23:53:20,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888706401] [2020-12-22 23:53:20,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:53:20,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:20,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:53:20,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:53:20,345 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand 18 states. [2020-12-22 23:53:20,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:20,599 INFO L93 Difference]: Finished difference Result 173 states and 190 transitions. [2020-12-22 23:53:20,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:53:20,600 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-12-22 23:53:20,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:20,601 INFO L225 Difference]: With dead ends: 173 [2020-12-22 23:53:20,601 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 23:53:20,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:53:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 23:53:20,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2020-12-22 23:53:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 23:53:20,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-12-22 23:53:20,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 85 [2020-12-22 23:53:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:20,610 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-12-22 23:53:20,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:53:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-12-22 23:53:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 23:53:20,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:20,612 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:20,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:20,826 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:20,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:20,827 INFO L82 PathProgramCache]: Analyzing trace with hash -137686115, now seen corresponding path program 10 times [2020-12-22 23:53:20,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:20,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542790824] [2020-12-22 23:53:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-22 23:53:20,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542790824] [2020-12-22 23:53:20,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979600832] [2020-12-22 23:53:20,983 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:21,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 23:53:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:21,330 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2020-12-22 23:53:21,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:21,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2020-12-22 23:53:21,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026132526] [2020-12-22 23:53:21,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 23:53:21,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:21,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 23:53:21,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:53:21,332 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 20 states. [2020-12-22 23:53:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:21,624 INFO L93 Difference]: Finished difference Result 195 states and 212 transitions. [2020-12-22 23:53:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 23:53:21,624 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-12-22 23:53:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:21,625 INFO L225 Difference]: With dead ends: 195 [2020-12-22 23:53:21,626 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 23:53:21,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-22 23:53:21,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 23:53:21,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2020-12-22 23:53:21,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 23:53:21,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2020-12-22 23:53:21,635 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 97 [2020-12-22 23:53:21,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:21,635 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2020-12-22 23:53:21,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 23:53:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2020-12-22 23:53:21,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 23:53:21,637 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:21,637 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:53:21,853 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:21,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:21,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2116330193, now seen corresponding path program 11 times [2020-12-22 23:53:21,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:21,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659234215] [2020-12-22 23:53:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:22,049 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-12-22 23:53:22,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659234215] [2020-12-22 23:53:22,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035109795] [2020-12-22 23:53:22,050 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true