/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:42:54,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:42:54,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:42:54,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:42:54,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:42:54,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:42:54,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:42:54,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:42:54,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:42:54,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:42:54,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:42:54,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:42:54,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:42:54,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:42:54,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:42:54,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:42:54,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:42:54,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:42:54,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:42:54,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:42:54,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:42:54,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:42:54,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:42:54,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:42:54,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:42:54,263 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:42:54,263 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:42:54,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:42:54,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:42:54,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:42:54,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:42:54,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:42:54,269 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:42:54,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:42:54,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:42:54,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:42:54,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:42:54,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:42:54,274 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:42:54,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:42:54,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:42:54,277 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 09:42:54,310 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:42:54,311 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:42:54,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:42:54,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:42:54,317 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:42:54,317 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:42:54,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:42:54,318 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:42:54,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:42:54,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:42:54,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:42:54,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:42:54,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:42:54,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:42:54,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:42:54,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:42:54,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:42:54,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:42:54,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:42:54,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:42:54,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:42:54,323 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:42:54,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:42:54,324 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:42:54,324 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:42:54,324 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:42:54,761 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:42:54,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:42:54,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:42:54,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:42:54,806 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:42:54,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2021-01-06 09:42:54,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78dc2b57b/9f6c5ec0591140919ecae8f2db6456ab/FLAG154d163f8 [2021-01-06 09:42:55,499 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:42:55,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i [2021-01-06 09:42:55,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78dc2b57b/9f6c5ec0591140919ecae8f2db6456ab/FLAG154d163f8 [2021-01-06 09:42:55,839 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/78dc2b57b/9f6c5ec0591140919ecae8f2db6456ab [2021-01-06 09:42:55,842 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:42:55,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:42:55,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:55,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:42:55,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:42:55,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:55" (1/1) ... [2021-01-06 09:42:55,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5318e7af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:55, skipping insertion in model container [2021-01-06 09:42:55,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:42:55" (1/1) ... [2021-01-06 09:42:55,872 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:42:55,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:42:56,141 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a1~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a7~0,],[IdentifierExpression[~a~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a2~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a3~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a4~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a5~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a6~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a8~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:56,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:56,212 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:42:56,235 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy7_ground-1.i[816,829] left hand side expression in assignment: lhs: VariableLHS[~a~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a1~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~a~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a2~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a3~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a3~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a4~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a4~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a5~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a5~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a6~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a6~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a8~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a8~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:42:56,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:42:56,299 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:42:56,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56 WrapperNode [2021-01-06 09:42:56,300 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:42:56,301 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:56,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:42:56,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:42:56,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:42:56,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:42:56,353 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:42:56,353 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:42:56,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,368 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,368 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,383 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (1/1) ... [2021-01-06 09:42:56,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:42:56,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:42:56,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:42:56,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:42:56,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (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 [2021-01-06 09:42:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:42:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:42:56,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:42:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:42:56,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:42:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:42:56,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:42:57,038 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:42:57,038 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 09:42:57,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:57 BoogieIcfgContainer [2021-01-06 09:42:57,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:42:57,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:42:57,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:42:57,056 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:42:57,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:42:55" (1/3) ... [2021-01-06 09:42:57,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd66ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:57, skipping insertion in model container [2021-01-06 09:42:57,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:42:56" (2/3) ... [2021-01-06 09:42:57,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd66ca4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:42:57, skipping insertion in model container [2021-01-06 09:42:57,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:42:57" (3/3) ... [2021-01-06 09:42:57,067 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2021-01-06 09:42:57,082 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:42:57,087 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:42:57,108 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:42:57,138 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:42:57,139 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:42:57,139 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:42:57,139 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:42:57,139 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:42:57,139 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:42:57,140 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:42:57,140 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:42:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2021-01-06 09:42:57,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:42:57,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:57,162 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] [2021-01-06 09:42:57,163 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:57,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1647230389, now seen corresponding path program 1 times [2021-01-06 09:42:57,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:57,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277667295] [2021-01-06 09:42:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:57,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:57,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:57,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277667295] [2021-01-06 09:42:57,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:42:57,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:42:57,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121812787] [2021-01-06 09:42:57,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:57,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:57,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:57,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:42:57,424 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2021-01-06 09:42:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:57,469 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2021-01-06 09:42:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:57,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2021-01-06 09:42:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:57,481 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:42:57,481 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 09:42:57,485 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 [2021-01-06 09:42:57,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 09:42:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 09:42:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:42:57,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2021-01-06 09:42:57,526 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 21 [2021-01-06 09:42:57,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:57,527 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2021-01-06 09:42:57,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2021-01-06 09:42:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 09:42:57,528 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:57,528 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] [2021-01-06 09:42:57,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:42:57,529 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash -212862985, now seen corresponding path program 1 times [2021-01-06 09:42:57,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:57,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121595353] [2021-01-06 09:42:57,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 09:42:57,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121595353] [2021-01-06 09:42:57,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617634859] [2021-01-06 09:42:57,607 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 [2021-01-06 09:42:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 09:42:57,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 09:42:57,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 09:42:57,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 09:42:57,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691319990] [2021-01-06 09:42:57,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:42:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:42:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:57,734 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand 3 states. [2021-01-06 09:42:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:57,861 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2021-01-06 09:42:57,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:42:57,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2021-01-06 09:42:57,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:57,863 INFO L225 Difference]: With dead ends: 72 [2021-01-06 09:42:57,863 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:42:57,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:57,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:42:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-01-06 09:42:57,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 09:42:57,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-01-06 09:42:57,873 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 23 [2021-01-06 09:42:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:57,874 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-01-06 09:42:57,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:42:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-01-06 09:42:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 09:42:57,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:57,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:58,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:42:58,090 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:58,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1047765161, now seen corresponding path program 1 times [2021-01-06 09:42:58,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:58,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177370598] [2021-01-06 09:42:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:58,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:42:58,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177370598] [2021-01-06 09:42:58,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609550482] [2021-01-06 09:42:58,215 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 [2021-01-06 09:42:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:58,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 09:42:58,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:58,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:58,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400805936] [2021-01-06 09:42:58,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:58,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:58,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:58,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:58,386 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2021-01-06 09:42:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:58,458 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-01-06 09:42:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:58,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2021-01-06 09:42:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:58,462 INFO L225 Difference]: With dead ends: 78 [2021-01-06 09:42:58,462 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:42:58,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:58,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:42:58,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 09:42:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:42:58,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-01-06 09:42:58,479 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 37 [2021-01-06 09:42:58,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:58,479 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-01-06 09:42:58,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:58,479 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-01-06 09:42:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:42:58,480 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:58,481 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:58,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:58,694 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:58,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1173005543, now seen corresponding path program 2 times [2021-01-06 09:42:58,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:58,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668026498] [2021-01-06 09:42:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 09:42:58,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668026498] [2021-01-06 09:42:58,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416578239] [2021-01-06 09:42:58,789 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 [2021-01-06 09:42:58,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:42:58,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:42:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:58,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 09:42:58,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:58,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:42:58,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736624989] [2021-01-06 09:42:58,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:42:58,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:58,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:42:58,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:58,939 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 5 states. [2021-01-06 09:42:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:59,065 INFO L93 Difference]: Finished difference Result 94 states and 115 transitions. [2021-01-06 09:42:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:42:59,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2021-01-06 09:42:59,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:59,067 INFO L225 Difference]: With dead ends: 94 [2021-01-06 09:42:59,068 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 09:42:59,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:42:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 09:42:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2021-01-06 09:42:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 09:42:59,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2021-01-06 09:42:59,078 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 39 [2021-01-06 09:42:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:59,078 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2021-01-06 09:42:59,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:42:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2021-01-06 09:42:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 09:42:59,080 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:59,080 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:42:59,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:42:59,295 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:42:59,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:42:59,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1514760601, now seen corresponding path program 3 times [2021-01-06 09:42:59,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:42:59,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110282921] [2021-01-06 09:42:59,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:42:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:42:59,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 09:42:59,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110282921] [2021-01-06 09:42:59,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222458739] [2021-01-06 09:42:59,425 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 [2021-01-06 09:42:59,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:42:59,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:42:59,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:42:59,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:42:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-01-06 09:42:59,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:42:59,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 09:42:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105243848] [2021-01-06 09:42:59,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:42:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:42:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:42:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:59,614 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2021-01-06 09:42:59,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:42:59,830 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2021-01-06 09:42:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:42:59,831 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 53 [2021-01-06 09:42:59,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:42:59,832 INFO L225 Difference]: With dead ends: 129 [2021-01-06 09:42:59,833 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 09:42:59,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:42:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 09:42:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2021-01-06 09:42:59,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:42:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2021-01-06 09:42:59,845 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 53 [2021-01-06 09:42:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:42:59,845 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2021-01-06 09:42:59,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:42:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2021-01-06 09:42:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:42:59,847 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:42:59,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:00,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:43:00,062 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:00,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:00,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1887563127, now seen corresponding path program 4 times [2021-01-06 09:43:00,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:00,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860915396] [2021-01-06 09:43:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-01-06 09:43:00,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860915396] [2021-01-06 09:43:00,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858722516] [2021-01-06 09:43:00,262 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 [2021-01-06 09:43:00,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:43:00,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:43:00,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:43:00,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:43:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-01-06 09:43:00,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:43:00,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:43:00,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657742327] [2021-01-06 09:43:00,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:43:00,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:43:00,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:43:00,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:43:00,424 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 7 states. [2021-01-06 09:43:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:43:00,450 INFO L93 Difference]: Finished difference Result 138 states and 154 transitions. [2021-01-06 09:43:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:43:00,450 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2021-01-06 09:43:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:43:00,451 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:43:00,452 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 09:43:00,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:43:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 09:43:00,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 09:43:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 09:43:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2021-01-06 09:43:00,470 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 69 [2021-01-06 09:43:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:43:00,470 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2021-01-06 09:43:00,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:43:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2021-01-06 09:43:00,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 09:43:00,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:43:00,475 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:43:00,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:43:00,677 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:43:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:43:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash -735797561, now seen corresponding path program 5 times [2021-01-06 09:43:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:43:00,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333953953] [2021-01-06 09:43:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:43:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:43:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-01-06 09:43:00,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333953953] [2021-01-06 09:43:00,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508180782] [2021-01-06 09:43:00,817 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