/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_copy6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-22 23:53:16,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 23:53:16,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 23:53:16,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 23:53:16,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 23:53:16,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 23:53:16,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 23:53:16,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 23:53:16,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 23:53:16,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 23:53:16,163 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 23:53:16,164 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 23:53:16,165 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 23:53:16,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 23:53:16,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 23:53:16,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 23:53:16,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 23:53:16,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 23:53:16,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 23:53:16,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 23:53:16,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 23:53:16,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 23:53:16,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 23:53:16,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 23:53:16,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 23:53:16,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 23:53:16,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 23:53:16,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 23:53:16,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 23:53:16,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 23:53:16,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 23:53:16,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 23:53:16,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 23:53:16,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 23:53:16,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 23:53:16,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 23:53:16,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 23:53:16,282 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 23:53:16,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 23:53:16,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 23:53:16,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 23:53:16,288 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 23:53:16,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 23:53:16,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 23:53:16,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 23:53:16,289 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 23:53:16,289 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 23:53:16,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 23:53:16,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 23:53:16,291 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 23:53:16,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 23:53:16,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 23:53:16,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 23:53:16,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 23:53:16,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 23:53:16,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 23:53:16,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 23:53:16,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 23:53:16,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 23:53:16,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 23:53:16,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 23:53:16,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 23:53:16,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 23:53:16,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 23:53:16,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 23:53:16,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 23:53:16,759 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 23:53:16,760 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 23:53:16,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2020-12-22 23:53:16,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/18aab30c2/671e9ecd17884185aa476a89d5938602/FLAG9eba4af7b [2020-12-22 23:53:17,548 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 23:53:17,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy6_ground-2.i [2020-12-22 23:53:17,565 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/18aab30c2/671e9ecd17884185aa476a89d5938602/FLAG9eba4af7b [2020-12-22 23:53:17,903 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/18aab30c2/671e9ecd17884185aa476a89d5938602 [2020-12-22 23:53:17,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 23:53:17,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 23:53:17,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 23:53:17,911 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 23:53:17,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 23:53:17,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:17" (1/1) ... [2020-12-22 23:53:17,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a7841ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:17, skipping insertion in model container [2020-12-22 23:53:17,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:53:17" (1/1) ... [2020-12-22 23:53:17,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 23:53:17,955 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 23:53:18,174 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_copy6_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: 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[~a7~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:53:18,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:53:18,212 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 23:53:18,227 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_copy6_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: 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[~#a7~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a7~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2020-12-22 23:53:18,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 23:53:18,273 INFO L208 MainTranslator]: Completed translation [2020-12-22 23:53:18,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18 WrapperNode [2020-12-22 23:53:18,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 23:53:18,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 23:53:18,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 23:53:18,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 23:53:18,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,316 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,361 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 23:53:18,363 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 23:53:18,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 23:53:18,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 23:53:18,374 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (1/1) ... [2020-12-22 23:53:18,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 23:53:18,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 23:53:18,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 23:53:18,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 23:53:18,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (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 23:53:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 23:53:18,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 23:53:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 23:53:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 23:53:18,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 23:53:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 23:53:18,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 23:53:19,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 23:53:19,208 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-22 23:53:19,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:19 BoogieIcfgContainer [2020-12-22 23:53:19,211 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 23:53:19,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 23:53:19,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 23:53:19,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 23:53:19,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:53:17" (1/3) ... [2020-12-22 23:53:19,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a0fa06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:19, skipping insertion in model container [2020-12-22 23:53:19,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:53:18" (2/3) ... [2020-12-22 23:53:19,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a0fa06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:53:19, skipping insertion in model container [2020-12-22 23:53:19,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:53:19" (3/3) ... [2020-12-22 23:53:19,220 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-2.i [2020-12-22 23:53:19,232 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 23:53:19,242 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 23:53:19,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 23:53:19,298 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 23:53:19,298 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 23:53:19,298 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 23:53:19,298 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 23:53:19,298 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 23:53:19,299 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 23:53:19,299 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 23:53:19,299 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 23:53:19,317 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-12-22 23:53:19,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 23:53:19,325 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:19,326 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 23:53:19,326 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:19,334 INFO L82 PathProgramCache]: Analyzing trace with hash -962610817, now seen corresponding path program 1 times [2020-12-22 23:53:19,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:19,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017595956] [2020-12-22 23:53:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:19,587 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 23:53:19,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017595956] [2020-12-22 23:53:19,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 23:53:19,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 23:53:19,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821054420] [2020-12-22 23:53:19,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:19,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:19,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:19,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 23:53:19,628 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-12-22 23:53:19,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:19,676 INFO L93 Difference]: Finished difference Result 64 states and 96 transitions. [2020-12-22 23:53:19,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:19,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 23:53:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:19,689 INFO L225 Difference]: With dead ends: 64 [2020-12-22 23:53:19,689 INFO L226 Difference]: Without dead ends: 31 [2020-12-22 23:53:19,693 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 23:53:19,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-12-22 23:53:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-12-22 23:53:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 23:53:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-22 23:53:19,734 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2020-12-22 23:53:19,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:19,735 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-22 23:53:19,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-22 23:53:19,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 23:53:19,736 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:19,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 23:53:19,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 23:53:19,737 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:19,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1385693007, now seen corresponding path program 1 times [2020-12-22 23:53:19,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:19,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992745780] [2020-12-22 23:53:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:19,826 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 23:53:19,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992745780] [2020-12-22 23:53:19,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372915862] [2020-12-22 23:53:19,827 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 23:53:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 23:53:19,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:19,963 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 23:53:19,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 23:53:19,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 23:53:19,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388764063] [2020-12-22 23:53:19,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 23:53:19,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:19,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 23:53:19,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:19,970 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 3 states. [2020-12-22 23:53:20,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:20,051 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2020-12-22 23:53:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 23:53:20,052 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-22 23:53:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:20,053 INFO L225 Difference]: With dead ends: 64 [2020-12-22 23:53:20,053 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 23:53:20,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 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 23:53:20,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 23:53:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-12-22 23:53:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 23:53:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-12-22 23:53:20,062 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 21 [2020-12-22 23:53:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:20,062 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-12-22 23:53:20,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 23:53:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-12-22 23:53:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 23:53:20,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:20,064 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] [2020-12-22 23:53:20,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 23:53:20,280 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:20,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1933824923, now seen corresponding path program 1 times [2020-12-22 23:53:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:20,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40185093] [2020-12-22 23:53:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:53:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40185093] [2020-12-22 23:53:20,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593415539] [2020-12-22 23:53:20,354 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 23:53:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 23:53:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:53:20,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:20,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 23:53:20,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966430065] [2020-12-22 23:53:20,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 23:53:20,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:20,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 23:53:20,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 23:53:20,529 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 5 states. [2020-12-22 23:53:20,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:20,558 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2020-12-22 23:53:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 23:53:20,559 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-22 23:53:20,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:20,560 INFO L225 Difference]: With dead ends: 70 [2020-12-22 23:53:20,560 INFO L226 Difference]: Without dead ends: 39 [2020-12-22 23:53:20,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 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 23:53:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-22 23:53:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2020-12-22 23:53:20,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 23:53:20,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-12-22 23:53:20,569 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 33 [2020-12-22 23:53:20,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:20,569 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-12-22 23:53:20,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 23:53:20,569 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-12-22 23:53:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-22 23:53:20,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:20,571 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] [2020-12-22 23:53:20,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:20,787 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:20,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:20,789 INFO L82 PathProgramCache]: Analyzing trace with hash 2053832611, now seen corresponding path program 2 times [2020-12-22 23:53:20,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:20,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277213109] [2020-12-22 23:53:20,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 23:53:20,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277213109] [2020-12-22 23:53:20,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688398473] [2020-12-22 23:53:20,918 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 23:53:21,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:21,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:53:21,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 23:53:21,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:21,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 23:53:21,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235738039] [2020-12-22 23:53:21,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 23:53:21,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:21,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 23:53:21,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 23:53:21,079 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 7 states. [2020-12-22 23:53:21,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:21,233 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-12-22 23:53:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:53:21,234 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-22 23:53:21,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:21,235 INFO L225 Difference]: With dead ends: 90 [2020-12-22 23:53:21,235 INFO L226 Difference]: Without dead ends: 59 [2020-12-22 23:53:21,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 23:53:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-22 23:53:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-12-22 23:53:21,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 23:53:21,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-12-22 23:53:21,245 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2020-12-22 23:53:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:21,245 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-12-22 23:53:21,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 23:53:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-12-22 23:53:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 23:53:21,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:21,247 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-12-22 23:53:21,455 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:21,456 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:21,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:21,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1234669803, now seen corresponding path program 3 times [2020-12-22 23:53:21,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:21,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545649362] [2020-12-22 23:53:21,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-22 23:53:21,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545649362] [2020-12-22 23:53:21,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537395044] [2020-12-22 23:53:21,667 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 23:53:21,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 23:53:21,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:21,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 23:53:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 23:53:21,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:21,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 23:53:21,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922211130] [2020-12-22 23:53:21,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 23:53:21,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:21,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 23:53:21,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 23:53:21,908 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 9 states. [2020-12-22 23:53:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:22,174 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-22 23:53:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 23:53:22,175 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-12-22 23:53:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:22,181 INFO L225 Difference]: With dead ends: 116 [2020-12-22 23:53:22,181 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 23:53:22,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 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 23:53:22,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 23:53:22,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2020-12-22 23:53:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 23:53:22,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2020-12-22 23:53:22,209 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 49 [2020-12-22 23:53:22,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:22,210 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2020-12-22 23:53:22,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 23:53:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2020-12-22 23:53:22,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 23:53:22,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:22,215 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-12-22 23:53:22,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:22,417 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:22,418 INFO L82 PathProgramCache]: Analyzing trace with hash -283021561, now seen corresponding path program 4 times [2020-12-22 23:53:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:22,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215481746] [2020-12-22 23:53:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:53:22,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215481746] [2020-12-22 23:53:22,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701927411] [2020-12-22 23:53:22,560 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 23:53:22,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:22,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:53:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:22,738 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:53:22,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:22,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 23:53:22,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827353961] [2020-12-22 23:53:22,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 23:53:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 23:53:22,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 23:53:22,741 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand 8 states. [2020-12-22 23:53:22,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:22,773 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2020-12-22 23:53:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 23:53:22,774 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-12-22 23:53:22,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:22,774 INFO L225 Difference]: With dead ends: 124 [2020-12-22 23:53:22,775 INFO L226 Difference]: Without dead ends: 69 [2020-12-22 23:53:22,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 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 23:53:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-22 23:53:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2020-12-22 23:53:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 23:53:22,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-12-22 23:53:22,783 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 63 [2020-12-22 23:53:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:22,783 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-12-22 23:53:22,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 23:53:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-12-22 23:53:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 23:53:22,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:22,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-12-22 23:53:22,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 23:53:23,000 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 633176517, now seen corresponding path program 5 times [2020-12-22 23:53:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:23,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25443792] [2020-12-22 23:53:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:23,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:23,165 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 23:53:23,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25443792] [2020-12-22 23:53:23,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194866580] [2020-12-22 23:53:23,166 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 23:53:26,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 23:53:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:26,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 23:53:26,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-22 23:53:26,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:26,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-12-22 23:53:26,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959166531] [2020-12-22 23:53:26,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:53:26,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:53:26,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:26,759 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 12 states. [2020-12-22 23:53:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:26,991 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2020-12-22 23:53:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 23:53:26,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-22 23:53:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:26,993 INFO L225 Difference]: With dead ends: 144 [2020-12-22 23:53:26,993 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 23:53:26,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 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 23:53:26,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 23:53:27,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 82. [2020-12-22 23:53:27,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 23:53:27,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2020-12-22 23:53:27,002 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 65 [2020-12-22 23:53:27,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:27,003 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2020-12-22 23:53:27,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:53:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2020-12-22 23:53:27,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 23:53:27,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:27,004 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 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, 1, 1] [2020-12-22 23:53:27,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:27,206 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:27,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1580429897, now seen corresponding path program 6 times [2020-12-22 23:53:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:27,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004094120] [2020-12-22 23:53:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-12-22 23:53:27,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004094120] [2020-12-22 23:53:27,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219591088] [2020-12-22 23:53:27,391 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 23:53:27,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 23:53:27,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:27,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 23:53:28,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-22 23:53:28,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:28,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 14 [2020-12-22 23:53:28,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335510684] [2020-12-22 23:53:28,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:53:28,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:28,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:53:28,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:53:28,150 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand 14 states. [2020-12-22 23:53:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:28,413 INFO L93 Difference]: Finished difference Result 170 states and 190 transitions. [2020-12-22 23:53:28,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 23:53:28,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 79 [2020-12-22 23:53:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:28,415 INFO L225 Difference]: With dead ends: 170 [2020-12-22 23:53:28,415 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 23:53:28,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 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 23:53:28,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 23:53:28,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 96. [2020-12-22 23:53:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 23:53:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-12-22 23:53:28,425 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 79 [2020-12-22 23:53:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:28,425 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-12-22 23:53:28,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:53:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-12-22 23:53:28,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 23:53:28,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:28,427 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 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, 1, 1] [2020-12-22 23:53:28,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:28,642 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:28,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:28,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1164659241, now seen corresponding path program 7 times [2020-12-22 23:53:28,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:28,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108875924] [2020-12-22 23:53:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 23:53:28,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108875924] [2020-12-22 23:53:28,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048942294] [2020-12-22 23:53:28,813 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 23:53:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:28,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 23:53:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 23:53:29,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:29,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 23:53:29,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551843] [2020-12-22 23:53:29,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 23:53:29,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 23:53:29,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 23:53:29,038 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 11 states. [2020-12-22 23:53:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:29,082 INFO L93 Difference]: Finished difference Result 178 states and 192 transitions. [2020-12-22 23:53:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 23:53:29,083 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2020-12-22 23:53:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:29,084 INFO L225 Difference]: With dead ends: 178 [2020-12-22 23:53:29,084 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 23:53:29,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 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 23:53:29,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 23:53:29,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-22 23:53:29,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 23:53:29,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2020-12-22 23:53:29,115 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 93 [2020-12-22 23:53:29,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:29,115 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2020-12-22 23:53:29,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 23:53:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2020-12-22 23:53:29,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 23:53:29,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:29,121 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 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, 1, 1] [2020-12-22 23:53:29,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 23:53:29,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:29,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:29,324 INFO L82 PathProgramCache]: Analyzing trace with hash -438272921, now seen corresponding path program 8 times [2020-12-22 23:53:29,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:29,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896736782] [2020-12-22 23:53:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:29,470 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 23:53:29,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896736782] [2020-12-22 23:53:29,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584540490] [2020-12-22 23:53:29,470 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 23:53:29,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 23:53:29,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 23:53:29,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:29,696 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 23:53:29,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:29,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 23:53:29,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636387428] [2020-12-22 23:53:29,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 23:53:29,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:29,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 23:53:29,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 23:53:29,699 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand 12 states. [2020-12-22 23:53:29,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:29,739 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2020-12-22 23:53:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 23:53:29,740 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 95 [2020-12-22 23:53:29,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:29,741 INFO L225 Difference]: With dead ends: 180 [2020-12-22 23:53:29,741 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 23:53:29,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 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 23:53:29,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 23:53:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2020-12-22 23:53:29,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 23:53:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-12-22 23:53:29,748 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 95 [2020-12-22 23:53:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:29,748 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-12-22 23:53:29,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 23:53:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-12-22 23:53:29,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 23:53:29,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:29,750 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 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, 1, 1] [2020-12-22 23:53:29,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:29,965 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:29,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:29,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1037178661, now seen corresponding path program 9 times [2020-12-22 23:53:29,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:29,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446264745] [2020-12-22 23:53:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-12-22 23:53:30,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446264745] [2020-12-22 23:53:30,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707395676] [2020-12-22 23:53:30,125 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 23:53:31,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 23:53:31,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:31,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 23:53:31,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-12-22 23:53:31,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:31,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2020-12-22 23:53:31,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414256638] [2020-12-22 23:53:31,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 23:53:31,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:31,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 23:53:31,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2020-12-22 23:53:31,967 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 18 states. [2020-12-22 23:53:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:32,228 INFO L93 Difference]: Finished difference Result 200 states and 220 transitions. [2020-12-22 23:53:32,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 23:53:32,229 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-12-22 23:53:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:32,230 INFO L225 Difference]: With dead ends: 200 [2020-12-22 23:53:32,230 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 23:53:32,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 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 23:53:32,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 23:53:32,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2020-12-22 23:53:32,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 23:53:32,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2020-12-22 23:53:32,240 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 97 [2020-12-22 23:53:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:32,241 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2020-12-22 23:53:32,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 23:53:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2020-12-22 23:53:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 23:53:32,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:32,249 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 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, 1, 1] [2020-12-22 23:53:32,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 23:53:32,463 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:32,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:32,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1497810153, now seen corresponding path program 10 times [2020-12-22 23:53:32,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:32,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539634957] [2020-12-22 23:53:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-22 23:53:32,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539634957] [2020-12-22 23:53:32,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977099451] [2020-12-22 23:53:32,656 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 23:53:32,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 23:53:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 23:53:32,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 23:53:32,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 23:53:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-22 23:53:32,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 23:53:32,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 23:53:32,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736624434] [2020-12-22 23:53:32,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 23:53:32,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 23:53:32,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 23:53:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:53:32,941 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand 14 states. [2020-12-22 23:53:32,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 23:53:32,995 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2020-12-22 23:53:32,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 23:53:32,996 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 111 [2020-12-22 23:53:32,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 23:53:32,998 INFO L225 Difference]: With dead ends: 208 [2020-12-22 23:53:32,998 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 23:53:32,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 23:53:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 23:53:33,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2020-12-22 23:53:33,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-22 23:53:33,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-12-22 23:53:33,007 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 111 [2020-12-22 23:53:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 23:53:33,008 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-12-22 23:53:33,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 23:53:33,009 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-12-22 23:53:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 23:53:33,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 23:53:33,014 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 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, 1, 1] [2020-12-22 23:53:33,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 23:53:33,229 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 23:53:33,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 23:53:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash 172595669, now seen corresponding path program 11 times [2020-12-22 23:53:33,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 23:53:33,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859399026] [2020-12-22 23:53:33,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 23:53:33,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 23:53:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-12-22 23:53:33,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859399026] [2020-12-22 23:53:33,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875877119] [2020-12-22 23:53:33,484 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