/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/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:53:22,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:53:22,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:53:22,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:53:22,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:53:22,283 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:53:22,285 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:53:22,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:53:22,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:53:22,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:53:22,292 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:53:22,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:53:22,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:53:22,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:53:22,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:53:22,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:53:22,299 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:53:22,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:53:22,303 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:53:22,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:53:22,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:53:22,310 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:53:22,311 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:53:22,312 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:53:22,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:53:22,342 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:53:22,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:53:22,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:53:22,346 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 00:53:22,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:53:22,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:53:22,378 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:53:22,378 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:53:22,379 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:53:22,379 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:53:22,379 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:53:22,380 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:53:22,380 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:53:22,380 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:53:22,380 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:53:22,381 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:53:22,381 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:53:22,381 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:53:22,381 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:53:22,382 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:53:22,382 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:53:22,382 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:53:22,382 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:53:22,383 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:53:22,383 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:53:22,383 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:53:22,383 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:53:22,384 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:53:22,384 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:53:22,384 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:53:22,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:53:22,871 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:53:22,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:53:22,876 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:53:22,877 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:53:22,878 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/init-3-u.c [2020-12-23 00:53:22,962 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c7ee46f8e/c55897ed1392488a939e2d7f829bd894/FLAG2966de2cb [2020-12-23 00:53:23,553 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:53:23,554 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/init-3-u.c [2020-12-23 00:53:23,562 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c7ee46f8e/c55897ed1392488a939e2d7f829bd894/FLAG2966de2cb [2020-12-23 00:53:23,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/c7ee46f8e/c55897ed1392488a939e2d7f829bd894 [2020-12-23 00:53:23,917 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:53:23,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:53:23,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:53:23,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:53:23,926 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:53:23,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:53:23" (1/1) ... [2020-12-23 00:53:23,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b711ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:23, skipping insertion in model container [2020-12-23 00:53:23,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:53:23" (1/1) ... [2020-12-23 00:53:23,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:53:23,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:53:24,098 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/init-3-u.c[320,333] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~0,]]],[IdentifierExpression[~k~0,]]] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~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,] [2020-12-23 00:53:24,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:53:24,130 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:53:24,143 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/init-3-u.c[320,333] 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: 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,] [2020-12-23 00:53:24,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:53:24,171 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:53:24,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24 WrapperNode [2020-12-23 00:53:24,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:53:24,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:53:24,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:53:24,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:53:24,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,191 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:53:24,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:53:24,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:53:24,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:53:24,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,228 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,241 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... [2020-12-23 00:53:24,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:53:24,247 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:53:24,247 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:53:24,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:53:24,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:53:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:53:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:53:24,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:53:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:53:24,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:53:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:53:24,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:53:24,720 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:53:24,720 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:53:24,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:53:24 BoogieIcfgContainer [2020-12-23 00:53:24,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:53:24,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:53:24,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:53:24,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:53:24,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:53:23" (1/3) ... [2020-12-23 00:53:24,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6505cc1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:53:24, skipping insertion in model container [2020-12-23 00:53:24,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:53:24" (2/3) ... [2020-12-23 00:53:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6505cc1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:53:24, skipping insertion in model container [2020-12-23 00:53:24,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:53:24" (3/3) ... [2020-12-23 00:53:24,735 INFO L111 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2020-12-23 00:53:24,744 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:53:24,750 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:53:24,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:53:24,838 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:53:24,839 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:53:24,839 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:53:24,841 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:53:24,841 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:53:24,841 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:53:24,842 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:53:24,842 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:53:24,864 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-23 00:53:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:53:24,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:24,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:24,877 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:24,888 INFO L82 PathProgramCache]: Analyzing trace with hash 468841592, now seen corresponding path program 1 times [2020-12-23 00:53:24,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:24,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124695815] [2020-12-23 00:53:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:25,053 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:25,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296030391] [2020-12-23 00:53:25,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:25,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-23 00:53:25,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124695815] [2020-12-23 00:53:25,211 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296030391] [2020-12-23 00:53:25,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:25,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 00:53:25,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705061166] [2020-12-23 00:53:25,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 00:53:25,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:25,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 00:53:25,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:53:25,239 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-23 00:53:25,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:25,263 INFO L93 Difference]: Finished difference Result 40 states and 64 transitions. [2020-12-23 00:53:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 00:53:25,265 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-23 00:53:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:25,276 INFO L225 Difference]: With dead ends: 40 [2020-12-23 00:53:25,276 INFO L226 Difference]: Without dead ends: 17 [2020-12-23 00:53:25,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 00:53:25,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-23 00:53:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-23 00:53:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 00:53:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2020-12-23 00:53:25,320 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 9 [2020-12-23 00:53:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:25,320 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2020-12-23 00:53:25,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 00:53:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2020-12-23 00:53:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 00:53:25,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:25,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:25,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:53:25,537 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:25,539 INFO L82 PathProgramCache]: Analyzing trace with hash -386465062, now seen corresponding path program 1 times [2020-12-23 00:53:25,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:25,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506357182] [2020-12-23 00:53:25,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:25,552 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:25,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705947102] [2020-12-23 00:53:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:25,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:25,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:25,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506357182] [2020-12-23 00:53:25,702 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:25,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705947102] [2020-12-23 00:53:25,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:25,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:53:25,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333958836] [2020-12-23 00:53:25,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:53:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:53:25,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:53:25,712 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand 3 states. [2020-12-23 00:53:25,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:25,754 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-12-23 00:53:25,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:53:25,754 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 00:53:25,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:25,755 INFO L225 Difference]: With dead ends: 32 [2020-12-23 00:53:25,756 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:53:25,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:53:25,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:53:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-12-23 00:53:25,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-23 00:53:25,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2020-12-23 00:53:25,763 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2020-12-23 00:53:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:25,763 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2020-12-23 00:53:25,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:53:25,763 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2020-12-23 00:53:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 00:53:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:25,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:25,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:25,980 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:25,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:25,982 INFO L82 PathProgramCache]: Analyzing trace with hash 750439074, now seen corresponding path program 1 times [2020-12-23 00:53:25,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:25,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714645721] [2020-12-23 00:53:25,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:25,994 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:25,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402618901] [2020-12-23 00:53:25,995 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 [2020-12-23 00:53:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:26,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714645721] [2020-12-23 00:53:26,094 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:26,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402618901] [2020-12-23 00:53:26,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:26,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:53:26,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249838693] [2020-12-23 00:53:26,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:53:26,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:26,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:53:26,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:26,097 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2020-12-23 00:53:26,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:26,168 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-12-23 00:53:26,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:53:26,169 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 00:53:26,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:26,170 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:53:26,170 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 00:53:26,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:26,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 00:53:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2020-12-23 00:53:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:53:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-23 00:53:26,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2020-12-23 00:53:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:26,178 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-23 00:53:26,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:53:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-23 00:53:26,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:53:26,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:26,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:26,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:26,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:26,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:26,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1168938424, now seen corresponding path program 1 times [2020-12-23 00:53:26,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:26,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641547226] [2020-12-23 00:53:26,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:26,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:26,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976161153] [2020-12-23 00:53:26,404 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 [2020-12-23 00:53:26,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:26,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:53:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:26,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641547226] [2020-12-23 00:53:26,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:26,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976161153] [2020-12-23 00:53:26,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:53:26,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:53:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568045808] [2020-12-23 00:53:26,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:53:26,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:26,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:53:26,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:26,529 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2020-12-23 00:53:26,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:26,622 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2020-12-23 00:53:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:53:26,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:53:26,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:26,625 INFO L225 Difference]: With dead ends: 44 [2020-12-23 00:53:26,625 INFO L226 Difference]: Without dead ends: 27 [2020-12-23 00:53:26,626 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 [2020-12-23 00:53:26,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-23 00:53:26,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-12-23 00:53:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-23 00:53:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-23 00:53:26,648 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 15 [2020-12-23 00:53:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:26,649 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-23 00:53:26,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:53:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-23 00:53:26,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 00:53:26,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:26,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:26,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:26,866 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:26,868 INFO L82 PathProgramCache]: Analyzing trace with hash 18975699, now seen corresponding path program 1 times [2020-12-23 00:53:26,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:26,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127838222] [2020-12-23 00:53:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:26,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:26,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451347956] [2020-12-23 00:53:26,881 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 [2020-12-23 00:53:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:26,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:26,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:27,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:27,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127838222] [2020-12-23 00:53:27,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:27,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451347956] [2020-12-23 00:53:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:53:27,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954740955] [2020-12-23 00:53:27,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:53:27,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:27,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:53:27,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:27,066 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 5 states. [2020-12-23 00:53:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:27,128 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2020-12-23 00:53:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:53:27,129 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 00:53:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:27,130 INFO L225 Difference]: With dead ends: 52 [2020-12-23 00:53:27,130 INFO L226 Difference]: Without dead ends: 33 [2020-12-23 00:53:27,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:53:27,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-23 00:53:27,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-12-23 00:53:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-23 00:53:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-23 00:53:27,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 16 [2020-12-23 00:53:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:27,137 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-23 00:53:27,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:53:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-23 00:53:27,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 00:53:27,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:27,138 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:27,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:27,352 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:27,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1270130408, now seen corresponding path program 2 times [2020-12-23 00:53:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:27,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428383162] [2020-12-23 00:53:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:27,365 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:27,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1882080214] [2020-12-23 00:53:27,365 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 [2020-12-23 00:53:27,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:27,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:27,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:53:27,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:53:27,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428383162] [2020-12-23 00:53:27,484 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:27,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882080214] [2020-12-23 00:53:27,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:27,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:53:27,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166949749] [2020-12-23 00:53:27,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:53:27,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:27,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:53:27,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:27,487 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-12-23 00:53:27,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:27,574 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-12-23 00:53:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:53:27,575 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 00:53:27,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:27,578 INFO L225 Difference]: With dead ends: 62 [2020-12-23 00:53:27,578 INFO L226 Difference]: Without dead ends: 39 [2020-12-23 00:53:27,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:53:27,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-12-23 00:53:27,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-12-23 00:53:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:53:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-12-23 00:53:27,586 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 17 [2020-12-23 00:53:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:27,586 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-12-23 00:53:27,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:53:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-12-23 00:53:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 00:53:27,587 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:27,587 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:27,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:27,802 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1717253235, now seen corresponding path program 3 times [2020-12-23 00:53:27,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:27,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863971713] [2020-12-23 00:53:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:27,815 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:27,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727120730] [2020-12-23 00:53:27,816 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:27,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:53:27,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:27,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:53:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 00:53:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863971713] [2020-12-23 00:53:27,922 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:27,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727120730] [2020-12-23 00:53:27,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:27,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:53:27,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27640365] [2020-12-23 00:53:27,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:53:27,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:27,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:53:27,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:53:27,925 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-12-23 00:53:27,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:27,986 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2020-12-23 00:53:27,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:53:27,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-23 00:53:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:27,988 INFO L225 Difference]: With dead ends: 65 [2020-12-23 00:53:27,988 INFO L226 Difference]: Without dead ends: 47 [2020-12-23 00:53:27,988 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 [2020-12-23 00:53:27,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-23 00:53:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2020-12-23 00:53:27,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 00:53:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-12-23 00:53:27,997 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-12-23 00:53:27,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:27,997 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-12-23 00:53:27,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:53:27,997 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-12-23 00:53:27,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 00:53:27,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:27,998 INFO L422 BasicCegarLoop]: trace histogram [6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:28,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:28,213 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:28,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:28,214 INFO L82 PathProgramCache]: Analyzing trace with hash -939344134, now seen corresponding path program 4 times [2020-12-23 00:53:28,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:28,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902278366] [2020-12-23 00:53:28,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:28,228 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:28,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998941672] [2020-12-23 00:53:28,229 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:28,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:28,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:28,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:53:28,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 00:53:28,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902278366] [2020-12-23 00:53:28,409 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:28,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998941672] [2020-12-23 00:53:28,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:28,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:53:28,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312797688] [2020-12-23 00:53:28,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:53:28,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:28,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:53:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:28,412 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-12-23 00:53:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:28,563 INFO L93 Difference]: Finished difference Result 122 states and 149 transitions. [2020-12-23 00:53:28,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:53:28,564 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-23 00:53:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:28,565 INFO L225 Difference]: With dead ends: 122 [2020-12-23 00:53:28,565 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 00:53:28,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-12-23 00:53:28,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 00:53:28,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-12-23 00:53:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 00:53:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-12-23 00:53:28,581 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 78 transitions. Word has length 27 [2020-12-23 00:53:28,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:28,582 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-12-23 00:53:28,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:53:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 78 transitions. [2020-12-23 00:53:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:53:28,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:28,583 INFO L422 BasicCegarLoop]: trace histogram [12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:28,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:53:28,798 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:28,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:28,799 INFO L82 PathProgramCache]: Analyzing trace with hash -2028398182, now seen corresponding path program 5 times [2020-12-23 00:53:28,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:28,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822262900] [2020-12-23 00:53:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:28,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:28,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [862445612] [2020-12-23 00:53:28,814 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:29,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-23 00:53:29,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:29,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:53:29,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 82 proven. 23 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-23 00:53:29,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822262900] [2020-12-23 00:53:29,497 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:29,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862445612] [2020-12-23 00:53:29,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:29,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:53:29,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826993733] [2020-12-23 00:53:29,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:53:29,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:29,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:53:29,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:29,499 INFO L87 Difference]: Start difference. First operand 63 states and 78 transitions. Second operand 9 states. [2020-12-23 00:53:29,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:29,776 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2020-12-23 00:53:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 00:53:29,776 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-23 00:53:29,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:29,778 INFO L225 Difference]: With dead ends: 170 [2020-12-23 00:53:29,778 INFO L226 Difference]: Without dead ends: 123 [2020-12-23 00:53:29,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-12-23 00:53:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-23 00:53:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-12-23 00:53:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 00:53:29,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-12-23 00:53:29,796 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 39 [2020-12-23 00:53:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:29,797 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-12-23 00:53:29,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:53:29,797 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-12-23 00:53:29,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 00:53:29,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:29,798 INFO L422 BasicCegarLoop]: trace histogram [18, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:30,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:30,014 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash -804241990, now seen corresponding path program 6 times [2020-12-23 00:53:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:30,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086168097] [2020-12-23 00:53:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:30,026 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:30,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107758173] [2020-12-23 00:53:30,027 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:30,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 00:53:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:30,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:53:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:30,264 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 201 proven. 6 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2020-12-23 00:53:30,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086168097] [2020-12-23 00:53:30,264 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107758173] [2020-12-23 00:53:30,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:30,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:53:30,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481214561] [2020-12-23 00:53:30,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:53:30,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:30,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:53:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:30,267 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 7 states. [2020-12-23 00:53:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:30,343 INFO L93 Difference]: Finished difference Result 196 states and 248 transitions. [2020-12-23 00:53:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:53:30,343 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-12-23 00:53:30,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:30,344 INFO L225 Difference]: With dead ends: 196 [2020-12-23 00:53:30,344 INFO L226 Difference]: Without dead ends: 117 [2020-12-23 00:53:30,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:53:30,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-23 00:53:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2020-12-23 00:53:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-23 00:53:30,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2020-12-23 00:53:30,364 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 51 [2020-12-23 00:53:30,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:30,365 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2020-12-23 00:53:30,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:53:30,365 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2020-12-23 00:53:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 00:53:30,366 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:30,367 INFO L422 BasicCegarLoop]: trace histogram [24, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:30,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:30,581 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 597276054, now seen corresponding path program 7 times [2020-12-23 00:53:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:30,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207292288] [2020-12-23 00:53:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:30,593 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:30,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505123547] [2020-12-23 00:53:30,593 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:53:30,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 00:53:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 134 proven. 10 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-12-23 00:53:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207292288] [2020-12-23 00:53:30,860 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:30,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505123547] [2020-12-23 00:53:30,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:30,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-23 00:53:30,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444361591] [2020-12-23 00:53:30,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 00:53:30,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:30,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 00:53:30,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:30,862 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand 8 states. [2020-12-23 00:53:30,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:30,959 INFO L93 Difference]: Finished difference Result 227 states and 284 transitions. [2020-12-23 00:53:30,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 00:53:30,959 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-12-23 00:53:30,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:30,960 INFO L225 Difference]: With dead ends: 227 [2020-12-23 00:53:30,961 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 00:53:30,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 00:53:30,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 00:53:30,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 117. [2020-12-23 00:53:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 00:53:30,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 144 transitions. [2020-12-23 00:53:30,981 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 144 transitions. Word has length 57 [2020-12-23 00:53:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:30,981 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 144 transitions. [2020-12-23 00:53:30,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 00:53:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 144 transitions. [2020-12-23 00:53:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 00:53:30,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:30,983 INFO L422 BasicCegarLoop]: trace histogram [30, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:31,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-23 00:53:31,198 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:31,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1929398778, now seen corresponding path program 8 times [2020-12-23 00:53:31,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:31,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353809906] [2020-12-23 00:53:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:31,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:31,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165032741] [2020-12-23 00:53:31,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:31,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:53:31,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:53:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2020-12-23 00:53:31,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353809906] [2020-12-23 00:53:31,459 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:31,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165032741] [2020-12-23 00:53:31,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:31,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:53:31,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76256060] [2020-12-23 00:53:31,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:53:31,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:31,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:53:31,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:31,462 INFO L87 Difference]: Start difference. First operand 117 states and 144 transitions. Second operand 9 states. [2020-12-23 00:53:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:31,561 INFO L93 Difference]: Finished difference Result 258 states and 320 transitions. [2020-12-23 00:53:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 00:53:31,561 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-12-23 00:53:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:31,563 INFO L225 Difference]: With dead ends: 258 [2020-12-23 00:53:31,563 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 00:53:31,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:53:31,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 00:53:31,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 132. [2020-12-23 00:53:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 00:53:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 162 transitions. [2020-12-23 00:53:31,584 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 162 transitions. Word has length 63 [2020-12-23 00:53:31,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:31,584 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 162 transitions. [2020-12-23 00:53:31,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:53:31,584 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 162 transitions. [2020-12-23 00:53:31,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 00:53:31,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:31,585 INFO L422 BasicCegarLoop]: trace histogram [36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:31,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:31,799 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1555635498, now seen corresponding path program 9 times [2020-12-23 00:53:31,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:31,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252047058] [2020-12-23 00:53:31,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:31,813 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:31,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [38726010] [2020-12-23 00:53:31,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:32,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 00:53:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 00:53:32,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 260 proven. 21 refuted. 0 times theorem prover too weak. 627 trivial. 0 not checked. [2020-12-23 00:53:32,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252047058] [2020-12-23 00:53:32,363 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:32,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38726010] [2020-12-23 00:53:32,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:32,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-23 00:53:32,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688310843] [2020-12-23 00:53:32,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 00:53:32,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:32,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 00:53:32,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:32,365 INFO L87 Difference]: Start difference. First operand 132 states and 162 transitions. Second operand 10 states. [2020-12-23 00:53:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:32,477 INFO L93 Difference]: Finished difference Result 289 states and 356 transitions. [2020-12-23 00:53:32,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 00:53:32,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-12-23 00:53:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:32,479 INFO L225 Difference]: With dead ends: 289 [2020-12-23 00:53:32,479 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 00:53:32,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 00:53:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 00:53:32,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 147. [2020-12-23 00:53:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 00:53:32,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2020-12-23 00:53:32,519 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 69 [2020-12-23 00:53:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:32,519 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2020-12-23 00:53:32,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 00:53:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2020-12-23 00:53:32,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 00:53:32,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:32,521 INFO L422 BasicCegarLoop]: trace histogram [42, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:32,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 00:53:32,736 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2132596282, now seen corresponding path program 10 times [2020-12-23 00:53:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:32,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934987083] [2020-12-23 00:53:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:32,749 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:32,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793786943] [2020-12-23 00:53:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:32,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:53:32,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:53:32,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 00:53:32,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:53:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1175 backedges. 624 proven. 208 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-12-23 00:53:33,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934987083] [2020-12-23 00:53:33,082 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:53:33,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793786943] [2020-12-23 00:53:33,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:53:33,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-23 00:53:33,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973245629] [2020-12-23 00:53:33,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 00:53:33,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:53:33,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 00:53:33,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-12-23 00:53:33,084 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand 14 states. [2020-12-23 00:53:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:53:33,427 INFO L93 Difference]: Finished difference Result 366 states and 441 transitions. [2020-12-23 00:53:33,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 00:53:33,428 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-12-23 00:53:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:53:33,432 INFO L225 Difference]: With dead ends: 366 [2020-12-23 00:53:33,432 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 00:53:33,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=262, Unknown=0, NotChecked=0, Total=420 [2020-12-23 00:53:33,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 00:53:33,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 191. [2020-12-23 00:53:33,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 00:53:33,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 234 transitions. [2020-12-23 00:53:33,470 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 234 transitions. Word has length 75 [2020-12-23 00:53:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:53:33,471 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 234 transitions. [2020-12-23 00:53:33,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 00:53:33,471 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 234 transitions. [2020-12-23 00:53:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-23 00:53:33,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:53:33,473 INFO L422 BasicCegarLoop]: trace histogram [56, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:53:33,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:53:33,688 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:53:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:53:33,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1310270298, now seen corresponding path program 11 times [2020-12-23 00:53:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:53:33,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829007572] [2020-12-23 00:53:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:53:33,701 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:53:33,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409517325] [2020-12-23 00:53:33,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true