/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-multidimensional/min-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:50:58,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:50:58,081 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:50:58,142 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:50:58,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:50:58,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:50:58,152 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:50:58,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:50:58,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:50:58,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:50:58,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:50:58,176 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:50:58,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:50:58,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:50:58,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:50:58,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:50:58,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:50:58,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:50:58,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:50:58,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:50:58,209 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:50:58,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:50:58,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:50:58,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:50:58,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:50:58,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:50:58,218 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:50:58,219 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:50:58,220 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:50:58,221 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:50:58,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:50:58,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:50:58,223 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:50:58,224 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:50:58,225 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:50:58,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:50:58,227 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:50:58,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:50:58,228 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:50:58,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:50:58,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:50:58,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:50:58,257 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:50:58,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:50:58,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:50:58,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:50:58,260 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:50:58,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:50:58,261 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:50:58,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:50:58,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:50:58,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:50:58,262 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:50:58,262 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:50:58,262 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:50:58,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:50:58,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:50:58,263 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:50:58,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:50:58,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:50:58,263 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:50:58,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:50:58,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:50:58,264 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:50:58,264 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:50:58,264 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:50:58,265 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:50:58,265 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:50:58,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:50:58,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:50:58,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:50:58,681 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:50:58,682 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:50:58,683 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-01-06 10:50:58,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1cf4ff763/b0a94cd62dc748999bbbbeb54d64a711/FLAG724b34746 [2021-01-06 10:50:59,389 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:50:59,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-3-n-u.c [2021-01-06 10:50:59,398 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1cf4ff763/b0a94cd62dc748999bbbbeb54d64a711/FLAG724b34746 [2021-01-06 10:50:59,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/1cf4ff763/b0a94cd62dc748999bbbbeb54d64a711 [2021-01-06 10:50:59,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:50:59,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:50:59,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:50:59,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:50:59,779 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:50:59,780 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:50:59" (1/1) ... [2021-01-06 10:50:59,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e99e9c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:59, skipping insertion in model container [2021-01-06 10:50:59,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:50:59" (1/1) ... [2021-01-06 10:50:59,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:50:59,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:51:00,013 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-multidimensional/min-3-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~k~0,]]] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:51:00,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:51:00,056 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:51:00,071 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-multidimensional/min-3-n-u.c[321,334] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~p~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~p~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~k~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:51:00,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:51:00,110 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:51:00,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00 WrapperNode [2021-01-06 10:51:00,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:51:00,114 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:51:00,115 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:51:00,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:51:00,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,148 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,194 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:51:00,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:51:00,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:51:00,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:51:00,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... [2021-01-06 10:51:00,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:51:00,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:51:00,266 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:51:00,266 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:51:00,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:51:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:51:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:51:00,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:51:00,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:51:00,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:51:00,406 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:51:00,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:51:00,902 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:51:00,905 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:51:00,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:51:00 BoogieIcfgContainer [2021-01-06 10:51:00,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:51:00,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:51:00,916 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:51:00,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:51:00,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:50:59" (1/3) ... [2021-01-06 10:51:00,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfa7448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:51:00, skipping insertion in model container [2021-01-06 10:51:00,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:51:00" (2/3) ... [2021-01-06 10:51:00,929 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cfa7448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:51:00, skipping insertion in model container [2021-01-06 10:51:00,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:51:00" (3/3) ... [2021-01-06 10:51:00,931 INFO L111 eAbstractionObserver]: Analyzing ICFG min-3-n-u.c [2021-01-06 10:51:00,948 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:51:00,957 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:51:01,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:51:01,085 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:51:01,085 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:51:01,085 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:51:01,085 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:51:01,086 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:51:01,086 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:51:01,086 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:51:01,086 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:51:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-01-06 10:51:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:51:01,114 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:01,115 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:01,115 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:01,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:01,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1361272673, now seen corresponding path program 1 times [2021-01-06 10:51:01,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:01,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511559167] [2021-01-06 10:51:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:01,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:01,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281159201] [2021-01-06 10:51:01,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:51:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:51:01,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511559167] [2021-01-06 10:51:01,524 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:01,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281159201] [2021-01-06 10:51:01,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:51:01,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:51:01,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140752041] [2021-01-06 10:51:01,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:51:01,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:01,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:51:01,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:51:01,555 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2021-01-06 10:51:01,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:01,574 INFO L93 Difference]: Finished difference Result 56 states and 94 transitions. [2021-01-06 10:51:01,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:51:01,576 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:51:01,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:01,586 INFO L225 Difference]: With dead ends: 56 [2021-01-06 10:51:01,586 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:51:01,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:51:01,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:51:01,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-01-06 10:51:01,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 10:51:01,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-01-06 10:51:01,628 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 11 [2021-01-06 10:51:01,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:01,629 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-01-06 10:51:01,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:51:01,629 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-01-06 10:51:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:51:01,630 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:01,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:01,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:51:01,844 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:01,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:01,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1322753665, now seen corresponding path program 1 times [2021-01-06 10:51:01,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:01,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755311844] [2021-01-06 10:51:01,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:01,861 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:01,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549830779] [2021-01-06 10:51:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:01,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:51:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:51:02,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755311844] [2021-01-06 10:51:02,006 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:02,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549830779] [2021-01-06 10:51:02,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:51:02,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:51:02,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246728873] [2021-01-06 10:51:02,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:51:02,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:02,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:51:02,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:51:02,010 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 3 states. [2021-01-06 10:51:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:02,067 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2021-01-06 10:51:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:51:02,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 10:51:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:02,069 INFO L225 Difference]: With dead ends: 48 [2021-01-06 10:51:02,069 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:51:02,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:51:02,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:51:02,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-01-06 10:51:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-01-06 10:51:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2021-01-06 10:51:02,077 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 11 [2021-01-06 10:51:02,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:02,077 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-01-06 10:51:02,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:51:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2021-01-06 10:51:02,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:51:02,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:02,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:02,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:02,294 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:02,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:02,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1329032119, now seen corresponding path program 1 times [2021-01-06 10:51:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444622357] [2021-01-06 10:51:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:02,318 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:02,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772893750] [2021-01-06 10:51:02,318 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:02,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:51:02,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:02,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:51:02,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444622357] [2021-01-06 10:51:02,430 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:02,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772893750] [2021-01-06 10:51:02,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:51:02,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:51:02,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635417323] [2021-01-06 10:51:02,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:51:02,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:02,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:51:02,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:02,432 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand 4 states. [2021-01-06 10:51:02,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:02,538 INFO L93 Difference]: Finished difference Result 67 states and 93 transitions. [2021-01-06 10:51:02,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:51:02,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 10:51:02,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:02,541 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:51:02,541 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 10:51:02,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:02,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 10:51:02,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2021-01-06 10:51:02,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:51:02,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2021-01-06 10:51:02,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2021-01-06 10:51:02,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:02,557 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2021-01-06 10:51:02,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:51:02,557 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2021-01-06 10:51:02,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:51:02,558 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:02,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:02,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:02,759 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:02,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:02,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1416884703, now seen corresponding path program 1 times [2021-01-06 10:51:02,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:02,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380099992] [2021-01-06 10:51:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:02,773 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:02,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2127971977] [2021-01-06 10:51:02,773 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:51:02,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:02,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:51:02,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380099992] [2021-01-06 10:51:02,890 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:02,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127971977] [2021-01-06 10:51:02,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:51:02,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:51:02,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124020840] [2021-01-06 10:51:02,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:51:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:51:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:02,896 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 4 states. [2021-01-06 10:51:03,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:03,028 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2021-01-06 10:51:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:51:03,028 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-01-06 10:51:03,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:03,032 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:51:03,033 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:51:03,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:51:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2021-01-06 10:51:03,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:51:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-01-06 10:51:03,054 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2021-01-06 10:51:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:03,055 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-01-06 10:51:03,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:51:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-01-06 10:51:03,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:51:03,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:03,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:03,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:03,259 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash 109301050, now seen corresponding path program 1 times [2021-01-06 10:51:03,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:03,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239920360] [2021-01-06 10:51:03,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:03,275 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:03,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114785269] [2021-01-06 10:51:03,276 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:51:03,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:51:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239920360] [2021-01-06 10:51:03,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:03,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114785269] [2021-01-06 10:51:03,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:51:03,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:51:03,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982019423] [2021-01-06 10:51:03,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:51:03,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:51:03,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:51:03,409 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand 5 states. [2021-01-06 10:51:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:03,547 INFO L93 Difference]: Finished difference Result 79 states and 103 transitions. [2021-01-06 10:51:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:51:03,548 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 10:51:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:03,549 INFO L225 Difference]: With dead ends: 79 [2021-01-06 10:51:03,549 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:51:03,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:51:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:51:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2021-01-06 10:51:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:51:03,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-01-06 10:51:03,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 18 [2021-01-06 10:51:03,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:03,564 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-01-06 10:51:03,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:51:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-01-06 10:51:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:51:03,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:03,565 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:03,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:03,779 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:03,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1771086529, now seen corresponding path program 2 times [2021-01-06 10:51:03,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:03,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881943331] [2021-01-06 10:51:03,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:03,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:03,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915441466] [2021-01-06 10:51:03,792 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 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 [2021-01-06 10:51:03,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:51:03,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:51:03,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:51:03,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:51:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881943331] [2021-01-06 10:51:03,891 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:03,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915441466] [2021-01-06 10:51:03,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:51:03,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:51:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32953543] [2021-01-06 10:51:03,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:51:03,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:03,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:51:03,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:03,893 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 4 states. [2021-01-06 10:51:03,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:03,954 INFO L93 Difference]: Finished difference Result 87 states and 111 transitions. [2021-01-06 10:51:03,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:51:03,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2021-01-06 10:51:03,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:03,957 INFO L225 Difference]: With dead ends: 87 [2021-01-06 10:51:03,957 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 10:51:03,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:03,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 10:51:03,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 40. [2021-01-06 10:51:03,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:51:03,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-01-06 10:51:03,978 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 19 [2021-01-06 10:51:03,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:03,979 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-01-06 10:51:03,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:51:03,979 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-01-06 10:51:03,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:51:03,980 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:03,980 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:04,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:04,196 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1618381713, now seen corresponding path program 1 times [2021-01-06 10:51:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:04,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646178517] [2021-01-06 10:51:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:04,227 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:04,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1215901957] [2021-01-06 10:51:04,227 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 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 [2021-01-06 10:51:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:51:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:51:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:51:04,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646178517] [2021-01-06 10:51:04,419 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:04,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215901957] [2021-01-06 10:51:04,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:51:04,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:51:04,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195746076] [2021-01-06 10:51:04,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:51:04,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:04,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:51:04,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:51:04,421 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 6 states. [2021-01-06 10:51:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:04,530 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2021-01-06 10:51:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:51:04,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2021-01-06 10:51:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:04,534 INFO L225 Difference]: With dead ends: 95 [2021-01-06 10:51:04,534 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:51:04,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:51:04,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:51:04,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2021-01-06 10:51:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 10:51:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2021-01-06 10:51:04,554 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 31 [2021-01-06 10:51:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:04,555 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2021-01-06 10:51:04,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:51:04,556 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2021-01-06 10:51:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:51:04,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:04,558 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:04,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:04,772 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:04,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:04,773 INFO L82 PathProgramCache]: Analyzing trace with hash -440379608, now seen corresponding path program 2 times [2021-01-06 10:51:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:04,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423517114] [2021-01-06 10:51:04,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:04,796 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:04,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903479843] [2021-01-06 10:51:04,796 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 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 [2021-01-06 10:51:04,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:51:04,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:51:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:51:04,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 10:51:04,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423517114] [2021-01-06 10:51:04,979 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:04,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903479843] [2021-01-06 10:51:04,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:51:04,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:51:04,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10712162] [2021-01-06 10:51:04,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:51:04,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:51:04,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:51:04,987 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand 7 states. [2021-01-06 10:51:05,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:05,137 INFO L93 Difference]: Finished difference Result 111 states and 140 transitions. [2021-01-06 10:51:05,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:51:05,137 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2021-01-06 10:51:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:05,138 INFO L225 Difference]: With dead ends: 111 [2021-01-06 10:51:05,138 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:51:05,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:51:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:51:05,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2021-01-06 10:51:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:51:05,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-01-06 10:51:05,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 35 [2021-01-06 10:51:05,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:05,153 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-01-06 10:51:05,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:51:05,153 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-01-06 10:51:05,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:51:05,154 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:05,154 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:05,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:51:05,369 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:05,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash 238928719, now seen corresponding path program 3 times [2021-01-06 10:51:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:05,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111842576] [2021-01-06 10:51:05,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:05,381 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:05,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [714079590] [2021-01-06 10:51:05,382 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 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 [2021-01-06 10:51:05,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:51:05,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:51:05,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:51:05,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:51:05,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111842576] [2021-01-06 10:51:05,531 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:05,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714079590] [2021-01-06 10:51:05,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:51:05,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:51:05,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020310447] [2021-01-06 10:51:05,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:51:05,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:05,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:51:05,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:05,534 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2021-01-06 10:51:05,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:51:05,587 INFO L93 Difference]: Finished difference Result 114 states and 146 transitions. [2021-01-06 10:51:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:51:05,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2021-01-06 10:51:05,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:51:05,590 INFO L225 Difference]: With dead ends: 114 [2021-01-06 10:51:05,590 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:51:05,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:51:05,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:51:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2021-01-06 10:51:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:51:05,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 81 transitions. [2021-01-06 10:51:05,604 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 81 transitions. Word has length 39 [2021-01-06 10:51:05,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:51:05,604 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 81 transitions. [2021-01-06 10:51:05,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:51:05,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 81 transitions. [2021-01-06 10:51:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:51:05,606 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:51:05,606 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:51:05,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:51:05,820 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:51:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:51:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1913562003, now seen corresponding path program 4 times [2021-01-06 10:51:05,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:51:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478481279] [2021-01-06 10:51:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:51:05,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:51:05,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2056264121] [2021-01-06 10:51:05,834 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 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 [2021-01-06 10:51:05,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:51:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:51:05,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:51:05,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:51:42,402 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:51:42,407 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:51:42,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:51:42,416 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 10:51:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 0 refuted. 6 times theorem prover too weak. 56 trivial. 0 not checked. [2021-01-06 10:51:42,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478481279] [2021-01-06 10:51:42,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:51:42,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056264121] [2021-01-06 10:51:42,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:51:42,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:51:42,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128379627] [2021-01-06 10:51:42,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:51:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:51:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:51:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=139, Unknown=17, NotChecked=0, Total=210 [2021-01-06 10:51:42,519 INFO L87 Difference]: Start difference. First operand 64 states and 81 transitions. Second operand 15 states. [2021-01-06 10:51:53,063 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2021-01-06 10:51:55,325 WARN L197 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 44 [2021-01-06 10:53:28,666 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification that was a NOOP. DAG size: 58 [2021-01-06 10:53:51,274 WARN L197 SmtUtils]: Spent 6.20 s on a formula simplification that was a NOOP. DAG size: 76 [2021-01-06 10:54:12,183 WARN L197 SmtUtils]: Spent 8.29 s on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 10:54:30,953 WARN L197 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 88 [2021-01-06 10:54:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:45,436 INFO L93 Difference]: Finished difference Result 110 states and 141 transitions. [2021-01-06 10:54:45,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:54:45,437 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2021-01-06 10:54:45,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:45,439 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:54:45,439 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:54:45,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 128.9s TimeCoverageRelationStatistics Valid=120, Invalid=339, Unknown=47, NotChecked=0, Total=506 [2021-01-06 10:54:45,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:54:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-01-06 10:54:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 10:54:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 128 transitions. [2021-01-06 10:54:45,457 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 128 transitions. Word has length 49 [2021-01-06 10:54:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:45,458 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 128 transitions. [2021-01-06 10:54:45,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:54:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 128 transitions. [2021-01-06 10:54:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:54:45,459 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:45,459 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:45,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:45,660 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1794599279, now seen corresponding path program 1 times [2021-01-06 10:54:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:45,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957696354] [2021-01-06 10:54:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:45,675 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:45,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1026793304] [2021-01-06 10:54:45,678 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 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 [2021-01-06 10:54:45,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:54:45,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:54:45,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 30 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 10:54:45,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957696354] [2021-01-06 10:54:45,956 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:45,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026793304] [2021-01-06 10:54:45,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:54:45,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:54:45,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217279401] [2021-01-06 10:54:45,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:54:45,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:45,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:54:45,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:54:45,959 INFO L87 Difference]: Start difference. First operand 99 states and 128 transitions. Second operand 8 states. [2021-01-06 10:54:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:46,157 INFO L93 Difference]: Finished difference Result 235 states and 306 transitions. [2021-01-06 10:54:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:54:46,158 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2021-01-06 10:54:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:46,160 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:54:46,160 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 10:54:46,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:54:46,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 10:54:46,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 116. [2021-01-06 10:54:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 10:54:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2021-01-06 10:54:46,179 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 49 [2021-01-06 10:54:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:46,179 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2021-01-06 10:54:46,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:54:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2021-01-06 10:54:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:54:46,181 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:46,181 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:46,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:54:46,395 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:46,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:46,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1853245373, now seen corresponding path program 2 times [2021-01-06 10:54:46,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:46,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044950023] [2021-01-06 10:54:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:46,406 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:46,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812166640] [2021-01-06 10:54:46,406 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 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 [2021-01-06 10:54:46,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:54:46,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:54:46,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:54:46,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:46,698 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 41 proven. 15 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-01-06 10:54:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044950023] [2021-01-06 10:54:46,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:46,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812166640] [2021-01-06 10:54:46,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:54:46,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:54:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482500471] [2021-01-06 10:54:46,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:54:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:54:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:54:46,701 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 9 states. [2021-01-06 10:54:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:46,933 INFO L93 Difference]: Finished difference Result 271 states and 351 transitions. [2021-01-06 10:54:46,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:54:46,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2021-01-06 10:54:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:46,935 INFO L225 Difference]: With dead ends: 271 [2021-01-06 10:54:46,936 INFO L226 Difference]: Without dead ends: 159 [2021-01-06 10:54:46,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:54:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-01-06 10:54:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 133. [2021-01-06 10:54:46,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2021-01-06 10:54:46,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 172 transitions. [2021-01-06 10:54:46,954 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 172 transitions. Word has length 54 [2021-01-06 10:54:46,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:46,955 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 172 transitions. [2021-01-06 10:54:46,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:54:46,955 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 172 transitions. [2021-01-06 10:54:46,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:54:46,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:46,956 INFO L422 BasicCegarLoop]: trace histogram [12, 6, 6, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:47,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:47,171 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:47,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:47,172 INFO L82 PathProgramCache]: Analyzing trace with hash -32752209, now seen corresponding path program 3 times [2021-01-06 10:54:47,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:47,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432311017] [2021-01-06 10:54:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:47,184 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:47,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1189794999] [2021-01-06 10:54:47,185 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:47,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:54:47,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:54:47,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:54:47,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-01-06 10:54:47,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432311017] [2021-01-06 10:54:47,399 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:47,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189794999] [2021-01-06 10:54:47,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:54:47,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:54:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330250353] [2021-01-06 10:54:47,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:54:47,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:47,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:54:47,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:54:47,402 INFO L87 Difference]: Start difference. First operand 133 states and 172 transitions. Second operand 5 states. [2021-01-06 10:54:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:47,539 INFO L93 Difference]: Finished difference Result 370 states and 484 transitions. [2021-01-06 10:54:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:54:47,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2021-01-06 10:54:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:47,544 INFO L225 Difference]: With dead ends: 370 [2021-01-06 10:54:47,544 INFO L226 Difference]: Without dead ends: 338 [2021-01-06 10:54:47,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:54:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-01-06 10:54:47,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 157. [2021-01-06 10:54:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2021-01-06 10:54:47,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 204 transitions. [2021-01-06 10:54:47,567 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 204 transitions. Word has length 59 [2021-01-06 10:54:47,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:47,567 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 204 transitions. [2021-01-06 10:54:47,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:54:47,568 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 204 transitions. [2021-01-06 10:54:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:54:47,570 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:47,571 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:47,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:54:47,772 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:47,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:47,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1244819935, now seen corresponding path program 4 times [2021-01-06 10:54:47,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:47,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27543388] [2021-01-06 10:54:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:47,783 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:47,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293221124] [2021-01-06 10:54:47,783 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:47,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:54:47,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:54:47,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:54:47,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:54:47,994 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-01-06 10:54:47,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:54:48,005 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:54:48,006 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:54:48,007 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2021-01-06 10:54:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-01-06 10:54:48,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27543388] [2021-01-06 10:54:48,078 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:54:48,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293221124] [2021-01-06 10:54:48,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:54:48,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-01-06 10:54:48,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739376021] [2021-01-06 10:54:48,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:54:48,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:54:48,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:54:48,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:54:48,080 INFO L87 Difference]: Start difference. First operand 157 states and 204 transitions. Second operand 6 states. [2021-01-06 10:54:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:54:48,330 INFO L93 Difference]: Finished difference Result 326 states and 430 transitions. [2021-01-06 10:54:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:54:48,331 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 83 [2021-01-06 10:54:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:54:48,333 INFO L225 Difference]: With dead ends: 326 [2021-01-06 10:54:48,333 INFO L226 Difference]: Without dead ends: 199 [2021-01-06 10:54:48,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:54:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-01-06 10:54:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-01-06 10:54:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2021-01-06 10:54:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 206 transitions. [2021-01-06 10:54:48,354 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 206 transitions. Word has length 83 [2021-01-06 10:54:48,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:54:48,354 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 206 transitions. [2021-01-06 10:54:48,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:54:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 206 transitions. [2021-01-06 10:54:48,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-01-06 10:54:48,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:54:48,357 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:54:48,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:54:48,570 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:54:48,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:54:48,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1511807331, now seen corresponding path program 5 times [2021-01-06 10:54:48,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:54:48,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721353660] [2021-01-06 10:54:48,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:54:48,591 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:54:48,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1193551556] [2021-01-06 10:54:48,592 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true