/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/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:46:38,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:46:38,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:46:38,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:46:38,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:46:38,158 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:46:38,161 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:46:38,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:46:38,169 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:46:38,175 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:46:38,179 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:46:38,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:46:38,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:46:38,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:46:38,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:46:38,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:46:38,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:46:38,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:46:38,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:46:38,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:46:38,220 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:46:38,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:46:38,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:46:38,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:46:38,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:46:38,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:46:38,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:46:38,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:46:38,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:46:38,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:46:38,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:46:38,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:46:38,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:46:38,234 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:46:38,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:46:38,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:46:38,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:46:38,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:46:38,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:46:38,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:46:38,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:46:38,239 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 10:46:38,268 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:46:38,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:46:38,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:46:38,270 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:46:38,270 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:46:38,270 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:46:38,271 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:46:38,271 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:46:38,271 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:46:38,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:46:38,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:46:38,272 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:46:38,272 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:46:38,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:46:38,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:46:38,273 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:46:38,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:46:38,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:46:38,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:46:38,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:46:38,274 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:46:38,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:46:38,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:46:38,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:46:38,275 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:46:38,275 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:46:38,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:46:38,653 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:46:38,656 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:46:38,658 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:46:38,659 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:46:38,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-01-06 10:46:38,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8329fcd46/cb1655f44534409a89933ea4bf6c1c18/FLAG2950d8804 [2021-01-06 10:46:39,350 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:46:39,351 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/copy-partial-3-u.c [2021-01-06 10:46:39,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8329fcd46/cb1655f44534409a89933ea4bf6c1c18/FLAG2950d8804 [2021-01-06 10:46:39,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/8329fcd46/cb1655f44534409a89933ea4bf6c1c18 [2021-01-06 10:46:39,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:46:39,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:46:39,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:46:39,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:46:39,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:46:39,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:46:39" (1/1) ... [2021-01-06 10:46:39,778 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d706667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:39, skipping insertion in model container [2021-01-06 10:46:39,778 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:46:39" (1/1) ... [2021-01-06 10:46:39,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:46:39,816 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:46:39,973 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/copy-partial-3-u.c[414,427] 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[~B~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[~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: 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[~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 10:46:40,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:46:40,017 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:46:40,033 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/copy-partial-3-u.c[414,427] 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[~#B~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#B~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~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[~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[~n~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~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: 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[~n~0,]],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IdentifierExpression[~j~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~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[~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 10:46:40,052 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:46:40,070 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:46:40,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40 WrapperNode [2021-01-06 10:46:40,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:46:40,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:46:40,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:46:40,073 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:46:40,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,092 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:46:40,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:46:40,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:46:40,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:46:40,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,153 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (1/1) ... [2021-01-06 10:46:40,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:46:40,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:46:40,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:46:40,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:46:40,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (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 10:46:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:46:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:46:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:46:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:46:40,286 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:46:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:46:40,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:46:40,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:46:40,879 INFO L299 CfgBuilder]: Removed 20 assume(true) statements. [2021-01-06 10:46:40,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:46:40 BoogieIcfgContainer [2021-01-06 10:46:40,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:46:40,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:46:40,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:46:40,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:46:40,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:46:39" (1/3) ... [2021-01-06 10:46:40,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aea2adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:46:40, skipping insertion in model container [2021-01-06 10:46:40,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:46:40" (2/3) ... [2021-01-06 10:46:40,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aea2adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:46:40, skipping insertion in model container [2021-01-06 10:46:40,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:46:40" (3/3) ... [2021-01-06 10:46:40,898 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2021-01-06 10:46:40,905 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:46:40,910 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:46:40,927 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:46:40,957 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:46:40,958 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:46:40,958 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:46:40,958 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:46:40,958 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:46:40,958 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:46:40,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:46:40,959 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:46:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2021-01-06 10:46:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:46:40,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:40,983 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:40,983 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:40,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:40,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1247519481, now seen corresponding path program 1 times [2021-01-06 10:46:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:41,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17483806] [2021-01-06 10:46:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:41,113 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:41,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679041334] [2021-01-06 10:46:41,114 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 10:46:41,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:41,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 1 conjunts are in the unsatisfiable core [2021-01-06 10:46:41,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:41,243 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 10:46:41,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17483806] [2021-01-06 10:46:41,245 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:41,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679041334] [2021-01-06 10:46:41,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:41,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:46:41,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832911006] [2021-01-06 10:46:41,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:46:41,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:46:41,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:46:41,282 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2021-01-06 10:46:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:41,317 INFO L93 Difference]: Finished difference Result 67 states and 116 transitions. [2021-01-06 10:46:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:46:41,319 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2021-01-06 10:46:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:41,337 INFO L225 Difference]: With dead ends: 67 [2021-01-06 10:46:41,337 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:46:41,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 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 10:46:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:46:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-01-06 10:46:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:46:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2021-01-06 10:46:41,395 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 15 [2021-01-06 10:46:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:41,395 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2021-01-06 10:46:41,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:46:41,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2021-01-06 10:46:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:46:41,397 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:41,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:41,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:46:41,612 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash -5605811, now seen corresponding path program 1 times [2021-01-06 10:46:41,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:41,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483106914] [2021-01-06 10:46:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:41,625 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:41,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796597565] [2021-01-06 10:46:41,626 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 10:46:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:41,764 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 10:46:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483106914] [2021-01-06 10:46:41,765 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796597565] [2021-01-06 10:46:41,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:41,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:41,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227814475] [2021-01-06 10:46:41,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:41,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:41,769 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2021-01-06 10:46:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:41,877 INFO L93 Difference]: Finished difference Result 73 states and 100 transitions. [2021-01-06 10:46:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:41,878 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 10:46:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:41,880 INFO L225 Difference]: With dead ends: 73 [2021-01-06 10:46:41,880 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:46:41,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 10:46:41,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:46:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 32. [2021-01-06 10:46:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-01-06 10:46:41,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2021-01-06 10:46:41,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 15 [2021-01-06 10:46:41,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:41,892 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2021-01-06 10:46:41,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:41,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2021-01-06 10:46:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 10:46:41,893 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:41,893 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 10:46:42,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:42,109 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash -785961326, now seen corresponding path program 1 times [2021-01-06 10:46:42,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90473861] [2021-01-06 10:46:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:42,134 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:42,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [14705690] [2021-01-06 10:46:42,136 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 10:46:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:42,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:42,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:42,246 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 10:46:42,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90473861] [2021-01-06 10:46:42,247 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:42,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14705690] [2021-01-06 10:46:42,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:42,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:42,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909898292] [2021-01-06 10:46:42,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:42,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:42,250 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand 4 states. [2021-01-06 10:46:42,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:42,377 INFO L93 Difference]: Finished difference Result 78 states and 108 transitions. [2021-01-06 10:46:42,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:42,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-01-06 10:46:42,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:42,380 INFO L225 Difference]: With dead ends: 78 [2021-01-06 10:46:42,380 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:46:42,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 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 10:46:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:46:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-01-06 10:46:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:46:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-01-06 10:46:42,405 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2021-01-06 10:46:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:42,405 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-01-06 10:46:42,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-01-06 10:46:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:46:42,407 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:42,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:42,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:42,623 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:42,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1148207861, now seen corresponding path program 1 times [2021-01-06 10:46:42,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:42,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232928674] [2021-01-06 10:46:42,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:42,640 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:42,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1029197955] [2021-01-06 10:46:42,641 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 10:46:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:42,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:42,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:42,774 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 10:46:42,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232928674] [2021-01-06 10:46:42,775 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:42,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029197955] [2021-01-06 10:46:42,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:42,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:42,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782633812] [2021-01-06 10:46:42,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:42,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:42,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:42,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:42,781 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 4 states. [2021-01-06 10:46:42,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:42,896 INFO L93 Difference]: Finished difference Result 80 states and 109 transitions. [2021-01-06 10:46:42,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:42,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2021-01-06 10:46:42,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:42,898 INFO L225 Difference]: With dead ends: 80 [2021-01-06 10:46:42,898 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:46:42,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 10:46:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:46:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2021-01-06 10:46:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 10:46:42,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-01-06 10:46:42,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 21 [2021-01-06 10:46:42,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:42,910 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-01-06 10:46:42,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:42,911 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-01-06 10:46:42,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 10:46:42,912 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:42,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:43,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:43,127 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1730545667, now seen corresponding path program 1 times [2021-01-06 10:46:43,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:43,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347400834] [2021-01-06 10:46:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:43,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:43,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864838798] [2021-01-06 10:46:43,140 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 10:46:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:43,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:43,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:43,299 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 10:46:43,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347400834] [2021-01-06 10:46:43,300 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:43,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864838798] [2021-01-06 10:46:43,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:43,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:46:43,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340495400] [2021-01-06 10:46:43,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:46:43,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:46:43,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:43,304 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 5 states. [2021-01-06 10:46:43,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:43,468 INFO L93 Difference]: Finished difference Result 98 states and 132 transitions. [2021-01-06 10:46:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:46:43,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 10:46:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:43,477 INFO L225 Difference]: With dead ends: 98 [2021-01-06 10:46:43,477 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:46:43,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 10:46:43,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:46:43,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2021-01-06 10:46:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 10:46:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2021-01-06 10:46:43,506 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 22 [2021-01-06 10:46:43,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:43,507 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2021-01-06 10:46:43,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:46:43,507 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2021-01-06 10:46:43,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 10:46:43,508 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:43,509 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:43,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:43,710 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:43,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:43,712 INFO L82 PathProgramCache]: Analyzing trace with hash 777591819, now seen corresponding path program 2 times [2021-01-06 10:46:43,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:43,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35842497] [2021-01-06 10:46:43,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:43,721 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515927935] [2021-01-06 10:46:43,722 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 10:46:43,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:46:43,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:43,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:43,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:43,821 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 10:46:43,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35842497] [2021-01-06 10:46:43,822 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:43,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515927935] [2021-01-06 10:46:43,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:43,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:43,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987298859] [2021-01-06 10:46:43,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:43,824 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 4 states. [2021-01-06 10:46:43,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:43,888 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2021-01-06 10:46:43,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:43,888 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2021-01-06 10:46:43,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:43,889 INFO L225 Difference]: With dead ends: 87 [2021-01-06 10:46:43,889 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 10:46:43,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 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 10:46:43,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 10:46:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 41. [2021-01-06 10:46:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:46:43,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2021-01-06 10:46:43,919 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 23 [2021-01-06 10:46:43,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:43,920 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2021-01-06 10:46:43,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:43,920 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2021-01-06 10:46:43,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:46:43,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:43,921 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:44,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:44,137 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:44,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1509151827, now seen corresponding path program 1 times [2021-01-06 10:46:44,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:44,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5041824] [2021-01-06 10:46:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:44,158 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:44,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834774410] [2021-01-06 10:46:44,160 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 10:46:44,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:44,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:46:44,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:46:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5041824] [2021-01-06 10:46:44,303 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:44,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834774410] [2021-01-06 10:46:44,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:44,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:46:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045407692] [2021-01-06 10:46:44,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:46:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:46:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:46:44,306 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 6 states. [2021-01-06 10:46:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:44,437 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2021-01-06 10:46:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:46:44,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 10:46:44,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:44,439 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:46:44,439 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:46:44,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 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 10:46:44,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:46:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 45. [2021-01-06 10:46:44,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:46:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-01-06 10:46:44,450 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 26 [2021-01-06 10:46:44,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:44,450 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-01-06 10:46:44,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:46:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-01-06 10:46:44,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:46:44,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:44,452 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:44,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:44,667 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1241121867, now seen corresponding path program 2 times [2021-01-06 10:46:44,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:44,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175868944] [2021-01-06 10:46:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:44,679 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:44,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339675572] [2021-01-06 10:46:44,680 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 10:46:44,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:46:44,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:44,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 10:46:44,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175868944] [2021-01-06 10:46:44,812 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:44,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339675572] [2021-01-06 10:46:44,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:44,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:44,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844080866] [2021-01-06 10:46:44,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:44,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:44,816 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand 4 states. [2021-01-06 10:46:44,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:44,917 INFO L93 Difference]: Finished difference Result 93 states and 119 transitions. [2021-01-06 10:46:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:44,917 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2021-01-06 10:46:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:44,918 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:46:44,918 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 10:46:44,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 10:46:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 46. [2021-01-06 10:46:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:46:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2021-01-06 10:46:44,934 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 27 [2021-01-06 10:46:44,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:44,934 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2021-01-06 10:46:44,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:44,934 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2021-01-06 10:46:44,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 10:46:44,938 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:44,944 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:45,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:46:45,147 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:45,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:45,148 INFO L82 PathProgramCache]: Analyzing trace with hash 235776412, now seen corresponding path program 1 times [2021-01-06 10:46:45,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:45,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946502202] [2021-01-06 10:46:45,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:45,157 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:45,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [419405205] [2021-01-06 10:46:45,158 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 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 10:46:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:46:45,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:46:45,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946502202] [2021-01-06 10:46:45,337 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:45,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419405205] [2021-01-06 10:46:45,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:45,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:46:45,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007138239] [2021-01-06 10:46:45,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:46:45,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:45,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:46:45,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:46:45,341 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 7 states. [2021-01-06 10:46:45,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:45,538 INFO L93 Difference]: Finished difference Result 146 states and 192 transitions. [2021-01-06 10:46:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:46:45,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2021-01-06 10:46:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:45,541 INFO L225 Difference]: With dead ends: 146 [2021-01-06 10:46:45,541 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:46:45,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 10:46:45,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:46:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 50. [2021-01-06 10:46:45,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 10:46:45,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2021-01-06 10:46:45,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 30 [2021-01-06 10:46:45,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:45,567 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2021-01-06 10:46:45,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:46:45,568 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2021-01-06 10:46:45,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:46:45,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:45,568 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:45,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:45,781 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash -317704796, now seen corresponding path program 2 times [2021-01-06 10:46:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:45,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299676643] [2021-01-06 10:46:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:45,802 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:45,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [418065070] [2021-01-06 10:46:45,803 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 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 10:46:45,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:46:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:45,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:46:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 10:46:45,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299676643] [2021-01-06 10:46:45,985 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:45,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418065070] [2021-01-06 10:46:45,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:45,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:46:45,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382480890] [2021-01-06 10:46:45,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:46:45,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:45,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:46:45,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:46:45,988 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand 8 states. [2021-01-06 10:46:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:46,181 INFO L93 Difference]: Finished difference Result 167 states and 219 transitions. [2021-01-06 10:46:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:46:46,182 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2021-01-06 10:46:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:46,183 INFO L225 Difference]: With dead ends: 167 [2021-01-06 10:46:46,183 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 10:46:46,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:46:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 10:46:46,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 54. [2021-01-06 10:46:46,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:46:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2021-01-06 10:46:46,195 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 31 [2021-01-06 10:46:46,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:46,195 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2021-01-06 10:46:46,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:46:46,195 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2021-01-06 10:46:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:46:46,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:46,196 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:46,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:46,412 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:46,414 INFO L82 PathProgramCache]: Analyzing trace with hash -295753060, now seen corresponding path program 3 times [2021-01-06 10:46:46,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:46,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789213283] [2021-01-06 10:46:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:46,423 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:46,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267699386] [2021-01-06 10:46:46,423 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 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 10:46:46,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:46:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:46:46,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-01-06 10:46:46,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789213283] [2021-01-06 10:46:46,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:46,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267699386] [2021-01-06 10:46:46,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:46,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:46,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774378239] [2021-01-06 10:46:46,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:46,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:46,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:46,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:46,525 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand 4 states. [2021-01-06 10:46:46,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:46,595 INFO L93 Difference]: Finished difference Result 120 states and 155 transitions. [2021-01-06 10:46:46,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:46,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-01-06 10:46:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:46,596 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:46:46,596 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 10:46:46,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 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 10:46:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 10:46:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-01-06 10:46:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 10:46:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2021-01-06 10:46:46,607 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 32 [2021-01-06 10:46:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:46,607 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2021-01-06 10:46:46,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:46,607 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2021-01-06 10:46:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-01-06 10:46:46,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:46,608 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:46,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:46:46,822 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:46,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1785847984, now seen corresponding path program 1 times [2021-01-06 10:46:46,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:46,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731035674] [2021-01-06 10:46:46,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:46,832 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:46,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291585093] [2021-01-06 10:46:46,832 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 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 10:46:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:46,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:46:46,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:47,034 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:46:47,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731035674] [2021-01-06 10:46:47,034 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:47,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291585093] [2021-01-06 10:46:47,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:47,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:46:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688440860] [2021-01-06 10:46:47,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:46:47,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:46:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:46:47,037 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand 9 states. [2021-01-06 10:46:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:47,240 INFO L93 Difference]: Finished difference Result 190 states and 248 transitions. [2021-01-06 10:46:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:46:47,240 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2021-01-06 10:46:47,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:47,241 INFO L225 Difference]: With dead ends: 190 [2021-01-06 10:46:47,242 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 10:46:47,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:46:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 10:46:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 59. [2021-01-06 10:46:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:46:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2021-01-06 10:46:47,260 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 35 [2021-01-06 10:46:47,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:47,261 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2021-01-06 10:46:47,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:46:47,261 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2021-01-06 10:46:47,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:46:47,262 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:47,262 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:47,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:47,477 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:47,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1865573976, now seen corresponding path program 2 times [2021-01-06 10:46:47,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:47,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479895889] [2021-01-06 10:46:47,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:47,487 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:47,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025179874] [2021-01-06 10:46:47,488 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 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 10:46:47,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:46:47,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:46:47,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:46:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479895889] [2021-01-06 10:46:47,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:47,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025179874] [2021-01-06 10:46:47,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:47,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:46:47,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048790968] [2021-01-06 10:46:47,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:46:47,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:47,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:46:47,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:47,687 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 10 states. [2021-01-06 10:46:47,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:47,928 INFO L93 Difference]: Finished difference Result 211 states and 275 transitions. [2021-01-06 10:46:47,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:46:47,928 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2021-01-06 10:46:47,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:47,929 INFO L225 Difference]: With dead ends: 211 [2021-01-06 10:46:47,930 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 10:46:47,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:47,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 10:46:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 63. [2021-01-06 10:46:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 10:46:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2021-01-06 10:46:47,942 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 36 [2021-01-06 10:46:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:47,943 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2021-01-06 10:46:47,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:46:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2021-01-06 10:46:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:46:47,943 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:47,944 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:48,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:46:48,159 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:48,160 INFO L82 PathProgramCache]: Analyzing trace with hash 904462256, now seen corresponding path program 3 times [2021-01-06 10:46:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:48,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680455110] [2021-01-06 10:46:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:48,169 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:48,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1466655666] [2021-01-06 10:46:48,170 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 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 10:46:48,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:46:48,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:48,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-01-06 10:46:48,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680455110] [2021-01-06 10:46:48,281 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:48,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466655666] [2021-01-06 10:46:48,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:48,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:46:48,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345814341] [2021-01-06 10:46:48,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:46:48,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:46:48,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:48,283 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand 5 states. [2021-01-06 10:46:48,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:48,399 INFO L93 Difference]: Finished difference Result 203 states and 260 transitions. [2021-01-06 10:46:48,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:46:48,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2021-01-06 10:46:48,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:48,401 INFO L225 Difference]: With dead ends: 203 [2021-01-06 10:46:48,401 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 10:46:48,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:48,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 10:46:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 76. [2021-01-06 10:46:48,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:46:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2021-01-06 10:46:48,414 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 37 [2021-01-06 10:46:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:48,415 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2021-01-06 10:46:48,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:46:48,415 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2021-01-06 10:46:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 10:46:48,415 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:48,415 INFO L422 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:48,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:48,630 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1171474406, now seen corresponding path program 4 times [2021-01-06 10:46:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:48,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018815534] [2021-01-06 10:46:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:48,639 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:48,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927163564] [2021-01-06 10:46:48,640 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 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 [2021-01-06 10:46:48,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:46:48,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:48,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:46:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 73 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-01-06 10:46:48,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018815534] [2021-01-06 10:46:48,791 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:48,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927163564] [2021-01-06 10:46:48,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:48,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:46:48,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729735648] [2021-01-06 10:46:48,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:46:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:48,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:46:48,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:46:48,793 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand 7 states. [2021-01-06 10:46:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:49,061 INFO L93 Difference]: Finished difference Result 266 states and 340 transitions. [2021-01-06 10:46:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:46:49,062 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2021-01-06 10:46:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:49,063 INFO L225 Difference]: With dead ends: 266 [2021-01-06 10:46:49,063 INFO L226 Difference]: Without dead ends: 204 [2021-01-06 10:46:49,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:46:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-01-06 10:46:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2021-01-06 10:46:49,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2021-01-06 10:46:49,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 152 transitions. [2021-01-06 10:46:49,085 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 152 transitions. Word has length 50 [2021-01-06 10:46:49,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:49,086 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 152 transitions. [2021-01-06 10:46:49,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:46:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 152 transitions. [2021-01-06 10:46:49,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 10:46:49,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:49,087 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 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, 1] [2021-01-06 10:46:49,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:46:49,302 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:49,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:49,303 INFO L82 PathProgramCache]: Analyzing trace with hash -671162281, now seen corresponding path program 5 times [2021-01-06 10:46:49,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:49,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540195627] [2021-01-06 10:46:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:49,312 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:49,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073281205] [2021-01-06 10:46:49,313 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:49,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 10:46:49,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:49,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:46:49,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 159 proven. 75 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-01-06 10:46:50,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540195627] [2021-01-06 10:46:50,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:50,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073281205] [2021-01-06 10:46:50,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:50,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:46:50,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991581218] [2021-01-06 10:46:50,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:46:50,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:50,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:46:50,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:46:50,023 INFO L87 Difference]: Start difference. First operand 122 states and 152 transitions. Second operand 13 states. [2021-01-06 10:46:50,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:50,759 INFO L93 Difference]: Finished difference Result 395 states and 488 transitions. [2021-01-06 10:46:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 10:46:50,760 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 60 [2021-01-06 10:46:50,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:50,762 INFO L225 Difference]: With dead ends: 395 [2021-01-06 10:46:50,762 INFO L226 Difference]: Without dead ends: 299 [2021-01-06 10:46:50,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=514, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:46:50,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-01-06 10:46:50,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2021-01-06 10:46:50,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2021-01-06 10:46:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2021-01-06 10:46:50,793 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 60 [2021-01-06 10:46:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:50,793 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2021-01-06 10:46:50,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:46:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2021-01-06 10:46:50,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 10:46:50,794 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:50,794 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 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, 1] [2021-01-06 10:46:51,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:46:51,010 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash 767896742, now seen corresponding path program 6 times [2021-01-06 10:46:51,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:51,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987650241] [2021-01-06 10:46:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:51,021 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:51,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1724899009] [2021-01-06 10:46:51,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:51,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 10:46:51,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:51,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:46:51,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1178 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2021-01-06 10:46:51,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987650241] [2021-01-06 10:46:51,261 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:51,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724899009] [2021-01-06 10:46:51,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:46:51,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:46:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21927666] [2021-01-06 10:46:51,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:46:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:46:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:46:51,263 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand 4 states. [2021-01-06 10:46:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:51,392 INFO L93 Difference]: Finished difference Result 253 states and 320 transitions. [2021-01-06 10:46:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:46:51,393 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 90 [2021-01-06 10:46:51,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:51,394 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:46:51,394 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 10:46:51,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 10:46:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 165. [2021-01-06 10:46:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 10:46:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 204 transitions. [2021-01-06 10:46:51,426 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 204 transitions. Word has length 90 [2021-01-06 10:46:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:51,426 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 204 transitions. [2021-01-06 10:46:51,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:46:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 204 transitions. [2021-01-06 10:46:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 10:46:51,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:51,428 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 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, 1, 1, 1, 1] [2021-01-06 10:46:51,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:46:51,639 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:51,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1559367401, now seen corresponding path program 1 times [2021-01-06 10:46:51,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:51,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703667093] [2021-01-06 10:46:51,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:51,651 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:51,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302441453] [2021-01-06 10:46:51,651 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:46:51,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:46:51,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 329 proven. 28 refuted. 0 times theorem prover too weak. 822 trivial. 0 not checked. [2021-01-06 10:46:51,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703667093] [2021-01-06 10:46:51,952 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:51,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302441453] [2021-01-06 10:46:51,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:51,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:46:51,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863850144] [2021-01-06 10:46:51,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:46:51,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:51,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:46:51,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:46:51,954 INFO L87 Difference]: Start difference. First operand 165 states and 204 transitions. Second operand 11 states. [2021-01-06 10:46:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:52,249 INFO L93 Difference]: Finished difference Result 418 states and 526 transitions. [2021-01-06 10:46:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:46:52,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 93 [2021-01-06 10:46:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:52,252 INFO L225 Difference]: With dead ends: 418 [2021-01-06 10:46:52,252 INFO L226 Difference]: Without dead ends: 267 [2021-01-06 10:46:52,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:46:52,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-01-06 10:46:52,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2021-01-06 10:46:52,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2021-01-06 10:46:52,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 222 transitions. [2021-01-06 10:46:52,283 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 222 transitions. Word has length 93 [2021-01-06 10:46:52,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:52,283 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 222 transitions. [2021-01-06 10:46:52,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:46:52,283 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 222 transitions. [2021-01-06 10:46:52,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:46:52,284 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:52,284 INFO L422 BasicCegarLoop]: trace histogram [48, 6, 6, 6, 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, 1, 1, 1, 1] [2021-01-06 10:46:52,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:46:52,500 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:52,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:52,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1086725029, now seen corresponding path program 2 times [2021-01-06 10:46:52,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:52,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461510642] [2021-01-06 10:46:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:52,513 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:52,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604795897] [2021-01-06 10:46:52,513 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:52,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:46:52,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:52,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:46:52,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1482 backedges. 414 proven. 36 refuted. 0 times theorem prover too weak. 1032 trivial. 0 not checked. [2021-01-06 10:46:52,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461510642] [2021-01-06 10:46:52,825 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:52,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604795897] [2021-01-06 10:46:52,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:52,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:46:52,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534297075] [2021-01-06 10:46:52,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:46:52,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:52,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:46:52,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:46:52,828 INFO L87 Difference]: Start difference. First operand 180 states and 222 transitions. Second operand 12 states. [2021-01-06 10:46:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:53,106 INFO L93 Difference]: Finished difference Result 457 states and 573 transitions. [2021-01-06 10:46:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:46:53,106 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 99 [2021-01-06 10:46:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:53,108 INFO L225 Difference]: With dead ends: 457 [2021-01-06 10:46:53,108 INFO L226 Difference]: Without dead ends: 292 [2021-01-06 10:46:53,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:46:53,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-01-06 10:46:53,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 195. [2021-01-06 10:46:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 10:46:53,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2021-01-06 10:46:53,142 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 99 [2021-01-06 10:46:53,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:53,142 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2021-01-06 10:46:53,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:46:53,142 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2021-01-06 10:46:53,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 10:46:53,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:53,143 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 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, 1, 1, 1, 1] [2021-01-06 10:46:53,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:53,357 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:53,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:53,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1811187945, now seen corresponding path program 3 times [2021-01-06 10:46:53,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:53,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062520331] [2021-01-06 10:46:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:53,373 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:53,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996836659] [2021-01-06 10:46:53,373 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:53,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:46:53,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:53,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:46:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1821 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2021-01-06 10:46:53,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062520331] [2021-01-06 10:46:53,602 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:53,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996836659] [2021-01-06 10:46:53,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:53,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:46:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164840164] [2021-01-06 10:46:53,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:46:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:53,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:46:53,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:46:53,604 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand 5 states. [2021-01-06 10:46:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:53,801 INFO L93 Difference]: Finished difference Result 530 states and 674 transitions. [2021-01-06 10:46:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:46:53,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2021-01-06 10:46:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:53,804 INFO L225 Difference]: With dead ends: 530 [2021-01-06 10:46:53,804 INFO L226 Difference]: Without dead ends: 434 [2021-01-06 10:46:53,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:46:53,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-01-06 10:46:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 201. [2021-01-06 10:46:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2021-01-06 10:46:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 248 transitions. [2021-01-06 10:46:53,837 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 248 transitions. Word has length 105 [2021-01-06 10:46:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:53,837 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 248 transitions. [2021-01-06 10:46:53,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:46:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 248 transitions. [2021-01-06 10:46:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:46:53,838 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:53,839 INFO L422 BasicCegarLoop]: trace histogram [54, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:46:54,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:54,051 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:54,052 INFO L82 PathProgramCache]: Analyzing trace with hash 156023911, now seen corresponding path program 4 times [2021-01-06 10:46:54,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:54,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229475696] [2021-01-06 10:46:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:54,061 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:54,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [954283722] [2021-01-06 10:46:54,061 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:46:54,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:46:54,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:46:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:46:54,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:46:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1831 backedges. 104 proven. 1134 refuted. 0 times theorem prover too weak. 593 trivial. 0 not checked. [2021-01-06 10:46:54,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229475696] [2021-01-06 10:46:54,340 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:46:54,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954283722] [2021-01-06 10:46:54,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:46:54,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:46:54,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871506647] [2021-01-06 10:46:54,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:46:54,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:46:54,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:46:54,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:46:54,342 INFO L87 Difference]: Start difference. First operand 201 states and 248 transitions. Second operand 9 states. [2021-01-06 10:46:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:46:54,673 INFO L93 Difference]: Finished difference Result 696 states and 883 transitions. [2021-01-06 10:46:54,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:46:54,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2021-01-06 10:46:54,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:46:54,677 INFO L225 Difference]: With dead ends: 696 [2021-01-06 10:46:54,678 INFO L226 Difference]: Without dead ends: 578 [2021-01-06 10:46:54,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:46:54,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-01-06 10:46:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 240. [2021-01-06 10:46:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2021-01-06 10:46:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 291 transitions. [2021-01-06 10:46:54,722 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 291 transitions. Word has length 111 [2021-01-06 10:46:54,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:46:54,722 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 291 transitions. [2021-01-06 10:46:54,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:46:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 291 transitions. [2021-01-06 10:46:54,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 10:46:54,724 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:46:54,724 INFO L422 BasicCegarLoop]: trace histogram [81, 9, 9, 9, 3, 3, 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, 1, 1, 1] [2021-01-06 10:46:54,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:46:54,939 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:46:54,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:46:54,940 INFO L82 PathProgramCache]: Analyzing trace with hash -666777473, now seen corresponding path program 5 times [2021-01-06 10:46:54,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:46:54,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108121085] [2021-01-06 10:46:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:46:54,952 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:46:54,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945708285] [2021-01-06 10:46:54,952 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:07,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-01-06 10:47:07,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:47:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4130 backedges. 2791 proven. 334 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-01-06 10:47:07,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108121085] [2021-01-06 10:47:07,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:07,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945708285] [2021-01-06 10:47:07,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:07,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:47:07,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123340234] [2021-01-06 10:47:07,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:47:07,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:07,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:47:07,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:47:07,344 INFO L87 Difference]: Start difference. First operand 240 states and 291 transitions. Second operand 12 states. [2021-01-06 10:47:07,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:07,744 INFO L93 Difference]: Finished difference Result 593 states and 718 transitions. [2021-01-06 10:47:07,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:47:07,747 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 150 [2021-01-06 10:47:07,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:07,749 INFO L225 Difference]: With dead ends: 593 [2021-01-06 10:47:07,749 INFO L226 Difference]: Without dead ends: 395 [2021-01-06 10:47:07,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:47:07,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-01-06 10:47:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 306. [2021-01-06 10:47:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2021-01-06 10:47:07,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 370 transitions. [2021-01-06 10:47:07,805 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 370 transitions. Word has length 150 [2021-01-06 10:47:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:07,806 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 370 transitions. [2021-01-06 10:47:07,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:47:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 370 transitions. [2021-01-06 10:47:07,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 10:47:07,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:07,808 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 3, 3, 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, 1, 1, 1] [2021-01-06 10:47:08,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:08,023 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:08,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash -109999408, now seen corresponding path program 6 times [2021-01-06 10:47:08,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:08,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135792487] [2021-01-06 10:47:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:08,035 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:08,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463313433] [2021-01-06 10:47:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:08,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 10:47:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:08,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:47:08,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:08,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7334 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7333 trivial. 0 not checked. [2021-01-06 10:47:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135792487] [2021-01-06 10:47:08,363 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463313433] [2021-01-06 10:47:08,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:08,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:47:08,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80455031] [2021-01-06 10:47:08,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:47:08,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:08,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:47:08,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:47:08,364 INFO L87 Difference]: Start difference. First operand 306 states and 370 transitions. Second operand 5 states. [2021-01-06 10:47:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:08,529 INFO L93 Difference]: Finished difference Result 707 states and 901 transitions. [2021-01-06 10:47:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:47:08,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 186 [2021-01-06 10:47:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:08,533 INFO L225 Difference]: With dead ends: 707 [2021-01-06 10:47:08,533 INFO L226 Difference]: Without dead ends: 567 [2021-01-06 10:47:08,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 182 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 10:47:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-01-06 10:47:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 312. [2021-01-06 10:47:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2021-01-06 10:47:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 378 transitions. [2021-01-06 10:47:08,589 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 378 transitions. Word has length 186 [2021-01-06 10:47:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:08,589 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 378 transitions. [2021-01-06 10:47:08,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:47:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 378 transitions. [2021-01-06 10:47:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-01-06 10:47:08,591 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:08,592 INFO L422 BasicCegarLoop]: trace histogram [108, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:08,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 10:47:08,805 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:08,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -454049746, now seen corresponding path program 7 times [2021-01-06 10:47:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:08,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686262577] [2021-01-06 10:47:08,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:08,819 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:08,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121944949] [2021-01-06 10:47:08,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:47:09,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:09,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7344 backedges. 1117 proven. 45 refuted. 0 times theorem prover too weak. 6182 trivial. 0 not checked. [2021-01-06 10:47:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686262577] [2021-01-06 10:47:09,349 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:09,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121944949] [2021-01-06 10:47:09,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:09,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-01-06 10:47:09,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676281035] [2021-01-06 10:47:09,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:47:09,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:47:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:47:09,351 INFO L87 Difference]: Start difference. First operand 312 states and 378 transitions. Second operand 13 states. [2021-01-06 10:47:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:09,709 INFO L93 Difference]: Finished difference Result 791 states and 986 transitions. [2021-01-06 10:47:09,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:47:09,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 192 [2021-01-06 10:47:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:09,712 INFO L225 Difference]: With dead ends: 791 [2021-01-06 10:47:09,712 INFO L226 Difference]: Without dead ends: 495 [2021-01-06 10:47:09,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:47:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-01-06 10:47:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 336. [2021-01-06 10:47:09,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2021-01-06 10:47:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 406 transitions. [2021-01-06 10:47:09,776 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 406 transitions. Word has length 192 [2021-01-06 10:47:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:09,776 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 406 transitions. [2021-01-06 10:47:09,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:47:09,776 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 406 transitions. [2021-01-06 10:47:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-01-06 10:47:09,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:09,779 INFO L422 BasicCegarLoop]: trace histogram [120, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:09,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:09,993 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1152016470, now seen corresponding path program 8 times [2021-01-06 10:47:09,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:09,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134878943] [2021-01-06 10:47:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:10,009 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:10,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346790616] [2021-01-06 10:47:10,009 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:10,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:47:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:47:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8850 backedges. 1348 proven. 55 refuted. 0 times theorem prover too weak. 7447 trivial. 0 not checked. [2021-01-06 10:47:10,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134878943] [2021-01-06 10:47:10,596 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:10,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346790616] [2021-01-06 10:47:10,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:10,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 10:47:10,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419357415] [2021-01-06 10:47:10,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:47:10,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:10,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:47:10,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:47:10,597 INFO L87 Difference]: Start difference. First operand 336 states and 406 transitions. Second operand 14 states. [2021-01-06 10:47:10,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:10,967 INFO L93 Difference]: Finished difference Result 853 states and 1060 transitions. [2021-01-06 10:47:10,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:47:10,968 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 204 [2021-01-06 10:47:10,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:10,971 INFO L225 Difference]: With dead ends: 853 [2021-01-06 10:47:10,971 INFO L226 Difference]: Without dead ends: 534 [2021-01-06 10:47:10,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:47:10,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2021-01-06 10:47:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 360. [2021-01-06 10:47:11,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2021-01-06 10:47:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 434 transitions. [2021-01-06 10:47:11,072 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 434 transitions. Word has length 204 [2021-01-06 10:47:11,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:11,072 INFO L481 AbstractCegarLoop]: Abstraction has 360 states and 434 transitions. [2021-01-06 10:47:11,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:47:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 434 transitions. [2021-01-06 10:47:11,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 10:47:11,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:11,076 INFO L422 BasicCegarLoop]: trace histogram [132, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:11,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 10:47:11,292 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:11,293 INFO L82 PathProgramCache]: Analyzing trace with hash -418362962, now seen corresponding path program 9 times [2021-01-06 10:47:11,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:11,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310889063] [2021-01-06 10:47:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:11,309 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:11,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472088886] [2021-01-06 10:47:11,310 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:11,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:47:11,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:11,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:47:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10500 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10492 trivial. 0 not checked. [2021-01-06 10:47:11,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310889063] [2021-01-06 10:47:11,631 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:11,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472088886] [2021-01-06 10:47:11,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:47:11,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:47:11,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445379177] [2021-01-06 10:47:11,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:47:11,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:47:11,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:47:11,633 INFO L87 Difference]: Start difference. First operand 360 states and 434 transitions. Second operand 4 states. [2021-01-06 10:47:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:11,746 INFO L93 Difference]: Finished difference Result 540 states and 673 transitions. [2021-01-06 10:47:11,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:47:11,747 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 216 [2021-01-06 10:47:11,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:11,749 INFO L225 Difference]: With dead ends: 540 [2021-01-06 10:47:11,749 INFO L226 Difference]: Without dead ends: 365 [2021-01-06 10:47:11,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 213 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 10:47:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-01-06 10:47:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 362. [2021-01-06 10:47:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2021-01-06 10:47:11,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 436 transitions. [2021-01-06 10:47:11,811 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 436 transitions. Word has length 216 [2021-01-06 10:47:11,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:11,812 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 436 transitions. [2021-01-06 10:47:11,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:47:11,812 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 436 transitions. [2021-01-06 10:47:11,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-01-06 10:47:11,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:11,815 INFO L422 BasicCegarLoop]: trace histogram [132, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:12,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:47:12,030 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:12,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:12,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1920298450, now seen corresponding path program 1 times [2021-01-06 10:47:12,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:12,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946223194] [2021-01-06 10:47:12,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:12,051 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:12,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341567813] [2021-01-06 10:47:12,052 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:12,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 1045 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:47:12,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10505 backedges. 1601 proven. 66 refuted. 0 times theorem prover too weak. 8838 trivial. 0 not checked. [2021-01-06 10:47:12,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946223194] [2021-01-06 10:47:12,694 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:12,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341567813] [2021-01-06 10:47:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:12,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-01-06 10:47:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202840526] [2021-01-06 10:47:12,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:47:12,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:47:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:47:12,696 INFO L87 Difference]: Start difference. First operand 362 states and 436 transitions. Second operand 15 states. [2021-01-06 10:47:13,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:13,061 INFO L93 Difference]: Finished difference Result 906 states and 1120 transitions. [2021-01-06 10:47:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:47:13,061 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 218 [2021-01-06 10:47:13,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:13,065 INFO L225 Difference]: With dead ends: 906 [2021-01-06 10:47:13,065 INFO L226 Difference]: Without dead ends: 562 [2021-01-06 10:47:13,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:47:13,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-01-06 10:47:13,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 386. [2021-01-06 10:47:13,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2021-01-06 10:47:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 464 transitions. [2021-01-06 10:47:13,149 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 464 transitions. Word has length 218 [2021-01-06 10:47:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:13,149 INFO L481 AbstractCegarLoop]: Abstraction has 386 states and 464 transitions. [2021-01-06 10:47:13,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:47:13,149 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 464 transitions. [2021-01-06 10:47:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-01-06 10:47:13,152 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:13,152 INFO L422 BasicCegarLoop]: trace histogram [144, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:13,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:47:13,366 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:13,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:13,367 INFO L82 PathProgramCache]: Analyzing trace with hash -863546290, now seen corresponding path program 2 times [2021-01-06 10:47:13,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:13,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497334794] [2021-01-06 10:47:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:13,380 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:13,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [317133463] [2021-01-06 10:47:13,380 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:13,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:47:13,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:13,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:47:13,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:14,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12299 backedges. 1876 proven. 78 refuted. 0 times theorem prover too weak. 10345 trivial. 0 not checked. [2021-01-06 10:47:14,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497334794] [2021-01-06 10:47:14,060 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:14,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317133463] [2021-01-06 10:47:14,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:14,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-01-06 10:47:14,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592683961] [2021-01-06 10:47:14,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:47:14,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:14,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:47:14,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:47:14,062 INFO L87 Difference]: Start difference. First operand 386 states and 464 transitions. Second operand 16 states. [2021-01-06 10:47:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:14,478 INFO L93 Difference]: Finished difference Result 968 states and 1194 transitions. [2021-01-06 10:47:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:47:14,478 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 230 [2021-01-06 10:47:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:14,481 INFO L225 Difference]: With dead ends: 968 [2021-01-06 10:47:14,481 INFO L226 Difference]: Without dead ends: 601 [2021-01-06 10:47:14,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:47:14,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-01-06 10:47:14,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 410. [2021-01-06 10:47:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2021-01-06 10:47:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 492 transitions. [2021-01-06 10:47:14,561 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 492 transitions. Word has length 230 [2021-01-06 10:47:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:14,561 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 492 transitions. [2021-01-06 10:47:14,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:47:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 492 transitions. [2021-01-06 10:47:14,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-01-06 10:47:14,562 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:14,562 INFO L422 BasicCegarLoop]: trace histogram [156, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:14,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:47:14,763 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:14,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash 360609618, now seen corresponding path program 3 times [2021-01-06 10:47:14,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:14,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812490106] [2021-01-06 10:47:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:14,778 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:14,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668067148] [2021-01-06 10:47:14,779 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:14,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:47:14,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:14,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:47:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14237 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14231 trivial. 0 not checked. [2021-01-06 10:47:15,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812490106] [2021-01-06 10:47:15,304 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:15,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668067148] [2021-01-06 10:47:15,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:47:15,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:47:15,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051460115] [2021-01-06 10:47:15,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:47:15,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:15,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:47:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:47:15,305 INFO L87 Difference]: Start difference. First operand 410 states and 492 transitions. Second operand 4 states. [2021-01-06 10:47:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:15,456 INFO L93 Difference]: Finished difference Result 600 states and 744 transitions. [2021-01-06 10:47:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:47:15,456 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 242 [2021-01-06 10:47:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:15,458 INFO L225 Difference]: With dead ends: 600 [2021-01-06 10:47:15,459 INFO L226 Difference]: Without dead ends: 415 [2021-01-06 10:47:15,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:47:15,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-01-06 10:47:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2021-01-06 10:47:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2021-01-06 10:47:15,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 494 transitions. [2021-01-06 10:47:15,530 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 494 transitions. Word has length 242 [2021-01-06 10:47:15,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:15,531 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 494 transitions. [2021-01-06 10:47:15,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:47:15,531 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 494 transitions. [2021-01-06 10:47:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-01-06 10:47:15,532 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:15,533 INFO L422 BasicCegarLoop]: trace histogram [156, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:15,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:47:15,746 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:15,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:15,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1609121386, now seen corresponding path program 1 times [2021-01-06 10:47:15,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:15,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841412098] [2021-01-06 10:47:15,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:15,761 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:15,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197666261] [2021-01-06 10:47:15,762 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:16,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:47:16,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14242 backedges. 2173 proven. 91 refuted. 0 times theorem prover too weak. 11978 trivial. 0 not checked. [2021-01-06 10:47:16,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841412098] [2021-01-06 10:47:16,505 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:16,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197666261] [2021-01-06 10:47:16,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:16,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-01-06 10:47:16,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247674430] [2021-01-06 10:47:16,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:47:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:47:16,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:47:16,507 INFO L87 Difference]: Start difference. First operand 412 states and 494 transitions. Second operand 17 states. [2021-01-06 10:47:17,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:17,030 INFO L93 Difference]: Finished difference Result 1034 states and 1272 transitions. [2021-01-06 10:47:17,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:47:17,031 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 244 [2021-01-06 10:47:17,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:17,034 INFO L225 Difference]: With dead ends: 1034 [2021-01-06 10:47:17,035 INFO L226 Difference]: Without dead ends: 642 [2021-01-06 10:47:17,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:47:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-01-06 10:47:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 436. [2021-01-06 10:47:17,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2021-01-06 10:47:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 522 transitions. [2021-01-06 10:47:17,132 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 522 transitions. Word has length 244 [2021-01-06 10:47:17,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:17,133 INFO L481 AbstractCegarLoop]: Abstraction has 436 states and 522 transitions. [2021-01-06 10:47:17,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:47:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 522 transitions. [2021-01-06 10:47:17,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-01-06 10:47:17,134 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:17,134 INFO L422 BasicCegarLoop]: trace histogram [168, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:17,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:17,348 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:17,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1795936494, now seen corresponding path program 2 times [2021-01-06 10:47:17,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:17,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861056156] [2021-01-06 10:47:17,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:17,363 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:17,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311352739] [2021-01-06 10:47:17,363 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:17,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:47:17,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:17,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:47:17,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16324 backedges. 2492 proven. 105 refuted. 0 times theorem prover too weak. 13727 trivial. 0 not checked. [2021-01-06 10:47:18,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861056156] [2021-01-06 10:47:18,150 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:18,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311352739] [2021-01-06 10:47:18,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:18,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-01-06 10:47:18,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002771257] [2021-01-06 10:47:18,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:47:18,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:18,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:47:18,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:47:18,152 INFO L87 Difference]: Start difference. First operand 436 states and 522 transitions. Second operand 18 states. [2021-01-06 10:47:18,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:18,673 INFO L93 Difference]: Finished difference Result 1096 states and 1346 transitions. [2021-01-06 10:47:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:47:18,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 256 [2021-01-06 10:47:18,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:18,678 INFO L225 Difference]: With dead ends: 1096 [2021-01-06 10:47:18,678 INFO L226 Difference]: Without dead ends: 681 [2021-01-06 10:47:18,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:47:18,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-01-06 10:47:18,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 460. [2021-01-06 10:47:18,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2021-01-06 10:47:18,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 550 transitions. [2021-01-06 10:47:18,773 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 550 transitions. Word has length 256 [2021-01-06 10:47:18,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:18,774 INFO L481 AbstractCegarLoop]: Abstraction has 460 states and 550 transitions. [2021-01-06 10:47:18,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:47:18,774 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 550 transitions. [2021-01-06 10:47:18,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-01-06 10:47:18,775 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:18,776 INFO L422 BasicCegarLoop]: trace histogram [180, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:18,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:18,991 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash -847230186, now seen corresponding path program 3 times [2021-01-06 10:47:18,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:18,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371416811] [2021-01-06 10:47:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:19,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:19,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135366091] [2021-01-06 10:47:19,008 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:19,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:47:19,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:19,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:47:19,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:19,218 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 10:47:19,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-01-06 10:47:19,255 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,274 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-01-06 10:47:19,279 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:47:19,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,290 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:46, output treesize:17 [2021-01-06 10:47:19,698 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-01-06 10:47:19,699 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,709 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:47:19,710 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,710 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2021-01-06 10:47:19,765 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:47:19,766 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2021-01-06 10:47:19,773 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,810 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2021-01-06 10:47:19,813 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 10:47:19,813 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2021-01-06 10:47:19,873 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:47:19,874 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2021-01-06 10:47:19,878 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:19,917 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2021-01-06 10:47:19,919 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 10:47:19,919 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2021-01-06 10:47:19,972 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 10:47:19,973 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 136 [2021-01-06 10:47:19,977 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 10:47:20,014 INFO L625 ElimStorePlain]: treesize reduction 110, result has 38.2 percent of original size [2021-01-06 10:47:20,016 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2021-01-06 10:47:20,017 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:72, output treesize:68 [2021-01-06 10:47:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 18550 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 18542 trivial. 0 not checked. [2021-01-06 10:47:20,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371416811] [2021-01-06 10:47:20,511 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:20,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135366091] [2021-01-06 10:47:20,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:20,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-01-06 10:47:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083967928] [2021-01-06 10:47:20,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:47:20,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:47:20,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:47:20,513 INFO L87 Difference]: Start difference. First operand 460 states and 550 transitions. Second operand 12 states. [2021-01-06 10:47:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:21,097 INFO L93 Difference]: Finished difference Result 664 states and 817 transitions. [2021-01-06 10:47:21,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:47:21,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 268 [2021-01-06 10:47:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:21,101 INFO L225 Difference]: With dead ends: 664 [2021-01-06 10:47:21,101 INFO L226 Difference]: Without dead ends: 662 [2021-01-06 10:47:21,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 254 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:47:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-01-06 10:47:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 464. [2021-01-06 10:47:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2021-01-06 10:47:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 554 transitions. [2021-01-06 10:47:21,232 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 554 transitions. Word has length 268 [2021-01-06 10:47:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:21,233 INFO L481 AbstractCegarLoop]: Abstraction has 464 states and 554 transitions. [2021-01-06 10:47:21,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:47:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 554 transitions. [2021-01-06 10:47:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-01-06 10:47:21,235 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:21,235 INFO L422 BasicCegarLoop]: trace histogram [180, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:21,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-01-06 10:47:21,449 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1693275844, now seen corresponding path program 1 times [2021-01-06 10:47:21,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:21,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745637635] [2021-01-06 10:47:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:21,466 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:21,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562614318] [2021-01-06 10:47:21,467 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:47:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 1353 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:47:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 18552 backedges. 2833 proven. 120 refuted. 0 times theorem prover too weak. 15599 trivial. 0 not checked. [2021-01-06 10:47:22,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745637635] [2021-01-06 10:47:22,251 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:22,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562614318] [2021-01-06 10:47:22,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:22,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-01-06 10:47:22,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673162706] [2021-01-06 10:47:22,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:47:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:47:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:47:22,253 INFO L87 Difference]: Start difference. First operand 464 states and 554 transitions. Second operand 19 states. [2021-01-06 10:47:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:22,878 INFO L93 Difference]: Finished difference Result 1165 states and 1427 transitions. [2021-01-06 10:47:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:47:22,878 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 271 [2021-01-06 10:47:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:22,882 INFO L225 Difference]: With dead ends: 1165 [2021-01-06 10:47:22,882 INFO L226 Difference]: Without dead ends: 723 [2021-01-06 10:47:22,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:47:22,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-01-06 10:47:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 488. [2021-01-06 10:47:23,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2021-01-06 10:47:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 582 transitions. [2021-01-06 10:47:23,005 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 582 transitions. Word has length 271 [2021-01-06 10:47:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:23,005 INFO L481 AbstractCegarLoop]: Abstraction has 488 states and 582 transitions. [2021-01-06 10:47:23,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:47:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 582 transitions. [2021-01-06 10:47:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-01-06 10:47:23,007 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:23,007 INFO L422 BasicCegarLoop]: trace histogram [192, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:23,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:23,223 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:23,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:23,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1903391176, now seen corresponding path program 2 times [2021-01-06 10:47:23,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:23,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038781740] [2021-01-06 10:47:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:23,239 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:23,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792627122] [2021-01-06 10:47:23,240 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:23,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:47:23,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:23,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1425 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:47:23,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20922 backedges. 3196 proven. 136 refuted. 0 times theorem prover too weak. 17590 trivial. 0 not checked. [2021-01-06 10:47:24,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038781740] [2021-01-06 10:47:24,161 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:24,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792627122] [2021-01-06 10:47:24,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:24,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-01-06 10:47:24,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118753177] [2021-01-06 10:47:24,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:47:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:24,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:47:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:47:24,163 INFO L87 Difference]: Start difference. First operand 488 states and 582 transitions. Second operand 20 states. [2021-01-06 10:47:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:24,747 INFO L93 Difference]: Finished difference Result 1227 states and 1501 transitions. [2021-01-06 10:47:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:47:24,748 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 283 [2021-01-06 10:47:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:24,750 INFO L225 Difference]: With dead ends: 1227 [2021-01-06 10:47:24,750 INFO L226 Difference]: Without dead ends: 762 [2021-01-06 10:47:24,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:47:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-01-06 10:47:24,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 512. [2021-01-06 10:47:24,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2021-01-06 10:47:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 610 transitions. [2021-01-06 10:47:24,849 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 610 transitions. Word has length 283 [2021-01-06 10:47:24,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:24,849 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 610 transitions. [2021-01-06 10:47:24,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:47:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 610 transitions. [2021-01-06 10:47:24,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2021-01-06 10:47:24,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:24,851 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:25,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-01-06 10:47:25,065 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:25,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:25,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1041466044, now seen corresponding path program 3 times [2021-01-06 10:47:25,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:25,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039183566] [2021-01-06 10:47:25,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:25,078 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:25,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1431771010] [2021-01-06 10:47:25,078 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:25,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:47:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:47:25,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 23436 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 23424 trivial. 0 not checked. [2021-01-06 10:47:25,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039183566] [2021-01-06 10:47:25,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:25,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431771010] [2021-01-06 10:47:25,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:25,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:47:25,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091382612] [2021-01-06 10:47:25,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:47:25,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:25,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:47:25,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:47:25,666 INFO L87 Difference]: Start difference. First operand 512 states and 610 transitions. Second operand 5 states. [2021-01-06 10:47:25,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:25,860 INFO L93 Difference]: Finished difference Result 773 states and 953 transitions. [2021-01-06 10:47:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:47:25,860 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 295 [2021-01-06 10:47:25,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:25,862 INFO L225 Difference]: With dead ends: 773 [2021-01-06 10:47:25,862 INFO L226 Difference]: Without dead ends: 518 [2021-01-06 10:47:25,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 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 10:47:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-01-06 10:47:25,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 514. [2021-01-06 10:47:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2021-01-06 10:47:25,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 612 transitions. [2021-01-06 10:47:25,990 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 612 transitions. Word has length 295 [2021-01-06 10:47:25,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:25,991 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 612 transitions. [2021-01-06 10:47:25,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:47:25,991 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 612 transitions. [2021-01-06 10:47:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-01-06 10:47:25,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:25,993 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:26,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:26,208 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:26,209 INFO L82 PathProgramCache]: Analyzing trace with hash -513125720, now seen corresponding path program 4 times [2021-01-06 10:47:26,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:26,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414422439] [2021-01-06 10:47:26,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:26,226 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:26,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208026070] [2021-01-06 10:47:26,227 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:47:26,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:47:26,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:47:26,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:47:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:47:26,678 INFO L134 CoverageAnalysis]: Checked inductivity of 23445 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 23425 trivial. 0 not checked. [2021-01-06 10:47:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414422439] [2021-01-06 10:47:26,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:47:26,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208026070] [2021-01-06 10:47:26,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:47:26,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:47:26,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078454690] [2021-01-06 10:47:26,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:47:26,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:47:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:47:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:47:26,680 INFO L87 Difference]: Start difference. First operand 514 states and 612 transitions. Second operand 7 states. [2021-01-06 10:47:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:47:26,925 INFO L93 Difference]: Finished difference Result 788 states and 970 transitions. [2021-01-06 10:47:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:47:26,925 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 297 [2021-01-06 10:47:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:47:26,928 INFO L225 Difference]: With dead ends: 788 [2021-01-06 10:47:26,928 INFO L226 Difference]: Without dead ends: 536 [2021-01-06 10:47:26,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:47:26,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-01-06 10:47:27,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 524. [2021-01-06 10:47:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2021-01-06 10:47:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 624 transitions. [2021-01-06 10:47:27,043 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 624 transitions. Word has length 297 [2021-01-06 10:47:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:47:27,043 INFO L481 AbstractCegarLoop]: Abstraction has 524 states and 624 transitions. [2021-01-06 10:47:27,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:47:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 624 transitions. [2021-01-06 10:47:27,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2021-01-06 10:47:27,045 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:47:27,045 INFO L422 BasicCegarLoop]: trace histogram [204, 12, 12, 12, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:47:27,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 10:47:27,260 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:47:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:47:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1721477340, now seen corresponding path program 5 times [2021-01-06 10:47:27,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:47:27,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761550223] [2021-01-06 10:47:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:47:27,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:47:27,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2138142320] [2021-01-06 10:47:27,277 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true