/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/max-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 00:56:33,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 00:56:33,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 00:56:33,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 00:56:33,205 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 00:56:33,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 00:56:33,209 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 00:56:33,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 00:56:33,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 00:56:33,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 00:56:33,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 00:56:33,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 00:56:33,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 00:56:33,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 00:56:33,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 00:56:33,224 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 00:56:33,225 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 00:56:33,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 00:56:33,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 00:56:33,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 00:56:33,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 00:56:33,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 00:56:33,238 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 00:56:33,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 00:56:33,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 00:56:33,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 00:56:33,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 00:56:33,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 00:56:33,282 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 00:56:33,328 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 00:56:33,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 00:56:33,332 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 00:56:33,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 00:56:33,333 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 00:56:33,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 00:56:33,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 00:56:33,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 00:56:33,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 00:56:33,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 00:56:33,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 00:56:33,337 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 00:56:33,337 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 00:56:33,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 00:56:33,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 00:56:33,338 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 00:56:33,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 00:56:33,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 00:56:33,339 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 00:56:33,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 00:56:33,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 00:56:33,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 00:56:33,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 00:56:33,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 00:56:33,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 00:56:33,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 00:56:33,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 00:56:33,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 00:56:33,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 00:56:33,878 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 00:56:33,878 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 00:56:33,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/max-2-u.c [2020-12-23 00:56:33,976 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/510e8b116/81fe183ea97546609c28ae1600486ec6/FLAG6a76152c6 [2020-12-23 00:56:34,612 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 00:56:34,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/max-2-u.c [2020-12-23 00:56:34,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/510e8b116/81fe183ea97546609c28ae1600486ec6/FLAG6a76152c6 [2020-12-23 00:56:34,992 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/510e8b116/81fe183ea97546609c28ae1600486ec6 [2020-12-23 00:56:34,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 00:56:35,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 00:56:35,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 00:56:35,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 00:56:35,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 00:56:35,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:56:34" (1/1) ... [2020-12-23 00:56:35,014 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@282f61d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35, skipping insertion in model container [2020-12-23 00:56:35,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 12:56:34" (1/1) ... [2020-12-23 00:56:35,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 00:56:35,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 00:56:35,236 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/max-2-u.c[319,332] 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[~j~0,] left hand side expression in assignment: lhs: ArrayLHS[ArrayLHS[VariableLHS[~A~0,],[IdentifierExpression[~i~0,]]],[IdentifierExpression[~j~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[~max~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~max~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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:56:35,280 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:56:35,298 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 00:56:35,317 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/max-2-u.c[319,332] 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[~j~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#A~0,],base],BinaryExpression[ARITHPLUS,BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#A~0,],offset],BinaryExpression[ARITHMUL,IdentifierExpression[~i~0,],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~n~0,]]]],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~j~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[~max~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~max~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[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 00:56:35,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 00:56:35,373 INFO L208 MainTranslator]: Completed translation [2020-12-23 00:56:35,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35 WrapperNode [2020-12-23 00:56:35,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 00:56:35,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 00:56:35,377 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 00:56:35,377 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 00:56:35,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,402 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,443 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 00:56:35,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 00:56:35,448 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 00:56:35,448 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 00:56:35,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,492 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (1/1) ... [2020-12-23 00:56:35,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 00:56:35,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 00:56:35,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 00:56:35,521 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 00:56:35,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (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 00:56:35,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 00:56:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 00:56:35,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 00:56:35,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 00:56:35,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 00:56:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 00:56:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 00:56:36,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 00:56:36,172 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2020-12-23 00:56:36,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:56:36 BoogieIcfgContainer [2020-12-23 00:56:36,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 00:56:36,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 00:56:36,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 00:56:36,197 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 00:56:36,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 12:56:34" (1/3) ... [2020-12-23 00:56:36,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d28ed7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:56:36, skipping insertion in model container [2020-12-23 00:56:36,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 12:56:35" (2/3) ... [2020-12-23 00:56:36,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d28ed7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 12:56:36, skipping insertion in model container [2020-12-23 00:56:36,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 12:56:36" (3/3) ... [2020-12-23 00:56:36,208 INFO L111 eAbstractionObserver]: Analyzing ICFG max-2-u.c [2020-12-23 00:56:36,228 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 00:56:36,238 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 00:56:36,287 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 00:56:36,317 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 00:56:36,318 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 00:56:36,318 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 00:56:36,318 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 00:56:36,318 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 00:56:36,318 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 00:56:36,318 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 00:56:36,319 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 00:56:36,334 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-23 00:56:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 00:56:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:36,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:36,342 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2020-12-23 00:56:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:36,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440612761] [2020-12-23 00:56:36,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:36,471 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:36,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175986066] [2020-12-23 00:56:36,473 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 00:56:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:36,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:56:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:36,663 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 00:56:36,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440612761] [2020-12-23 00:56:36,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:36,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175986066] [2020-12-23 00:56:36,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:56:36,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 00:56:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079677173] [2020-12-23 00:56:36,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 00:56:36,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 00:56:36,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 00:56:36,693 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-23 00:56:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:36,761 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2020-12-23 00:56:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 00:56:36,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 00:56:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:36,773 INFO L225 Difference]: With dead ends: 47 [2020-12-23 00:56:36,773 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 00:56:36,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 00:56:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 00:56:36,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-23 00:56:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-23 00:56:36,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-23 00:56:36,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2020-12-23 00:56:36,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:36,821 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-23 00:56:36,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 00:56:36,822 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2020-12-23 00:56:36,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 00:56:36,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:36,823 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:37,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-12-23 00:56:37,039 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:37,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:37,040 INFO L82 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2020-12-23 00:56:37,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:37,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138167466] [2020-12-23 00:56:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:37,057 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:37,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1387362574] [2020-12-23 00:56:37,058 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 00:56:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:37,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:56:37,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:37,176 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 00:56:37,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138167466] [2020-12-23 00:56:37,177 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:37,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387362574] [2020-12-23 00:56:37,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:56:37,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:56:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316451446] [2020-12-23 00:56:37,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:56:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:37,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:56:37,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:56:37,181 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2020-12-23 00:56:37,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:37,248 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2020-12-23 00:56:37,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:56:37,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 00:56:37,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:37,250 INFO L225 Difference]: With dead ends: 49 [2020-12-23 00:56:37,250 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 00:56:37,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 00:56:37,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 00:56:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2020-12-23 00:56:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 00:56:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2020-12-23 00:56:37,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2020-12-23 00:56:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:37,260 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2020-12-23 00:56:37,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:56:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2020-12-23 00:56:37,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 00:56:37,261 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:37,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:37,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:37,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:37,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:37,479 INFO L82 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2020-12-23 00:56:37,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:37,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631244622] [2020-12-23 00:56:37,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:37,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:37,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374056488] [2020-12-23 00:56:37,492 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 00:56:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:37,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:56:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:37,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 00:56:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631244622] [2020-12-23 00:56:37,606 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:37,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374056488] [2020-12-23 00:56:37,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:37,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-23 00:56:37,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085002296] [2020-12-23 00:56:37,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 00:56:37,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:37,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 00:56:37,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 00:56:37,608 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2020-12-23 00:56:37,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:37,693 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2020-12-23 00:56:37,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 00:56:37,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-23 00:56:37,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:37,695 INFO L225 Difference]: With dead ends: 61 [2020-12-23 00:56:37,695 INFO L226 Difference]: Without dead ends: 41 [2020-12-23 00:56:37,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 00:56:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-23 00:56:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-23 00:56:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-23 00:56:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-12-23 00:56:37,704 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2020-12-23 00:56:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:37,705 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-12-23 00:56:37,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 00:56:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-12-23 00:56:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 00:56:37,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:37,706 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:37,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:37,920 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2020-12-23 00:56:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:37,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335333526] [2020-12-23 00:56:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:37,936 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:37,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104113889] [2020-12-23 00:56:37,937 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 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 00:56:37,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 00:56:37,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:37,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 00:56:37,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 00:56:38,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335333526] [2020-12-23 00:56:38,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:38,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104113889] [2020-12-23 00:56:38,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 00:56:38,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 00:56:38,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619376782] [2020-12-23 00:56:38,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:56:38,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:38,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:56:38,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:56:38,053 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2020-12-23 00:56:38,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:38,134 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2020-12-23 00:56:38,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:56:38,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 00:56:38,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:38,136 INFO L225 Difference]: With dead ends: 66 [2020-12-23 00:56:38,136 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 00:56:38,137 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 00:56:38,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 00:56:38,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2020-12-23 00:56:38,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 00:56:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2020-12-23 00:56:38,146 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2020-12-23 00:56:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:38,146 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2020-12-23 00:56:38,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:56:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2020-12-23 00:56:38,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 00:56:38,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:38,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:38,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:38,363 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:38,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2020-12-23 00:56:38,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:38,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172568349] [2020-12-23 00:56:38,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:38,377 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:38,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [973450151] [2020-12-23 00:56:38,378 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 00:56:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 00:56:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 00:56:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 00:56:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172568349] [2020-12-23 00:56:38,516 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:38,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973450151] [2020-12-23 00:56:38,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:38,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-23 00:56:38,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564280158] [2020-12-23 00:56:38,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 00:56:38,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 00:56:38,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 00:56:38,519 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2020-12-23 00:56:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:38,635 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-12-23 00:56:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 00:56:38,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-12-23 00:56:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:38,637 INFO L225 Difference]: With dead ends: 77 [2020-12-23 00:56:38,637 INFO L226 Difference]: Without dead ends: 49 [2020-12-23 00:56:38,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 00:56:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-23 00:56:38,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-12-23 00:56:38,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-23 00:56:38,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2020-12-23 00:56:38,648 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2020-12-23 00:56:38,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:38,648 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2020-12-23 00:56:38,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 00:56:38,649 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2020-12-23 00:56:38,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 00:56:38,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:38,650 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:38,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:38,865 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:38,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2020-12-23 00:56:38,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:38,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635893133] [2020-12-23 00:56:38,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:38,878 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:38,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432038086] [2020-12-23 00:56:38,879 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 00:56:38,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 00:56:38,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:38,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 00:56:38,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 00:56:39,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635893133] [2020-12-23 00:56:39,039 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:39,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432038086] [2020-12-23 00:56:39,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:39,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-23 00:56:39,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736755941] [2020-12-23 00:56:39,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 00:56:39,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:39,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 00:56:39,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 00:56:39,042 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2020-12-23 00:56:39,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:39,149 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2020-12-23 00:56:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 00:56:39,150 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-12-23 00:56:39,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:39,151 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:56:39,151 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:56:39,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 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 00:56:39,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:56:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-12-23 00:56:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 00:56:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2020-12-23 00:56:39,160 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2020-12-23 00:56:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:39,161 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2020-12-23 00:56:39,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 00:56:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2020-12-23 00:56:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 00:56:39,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:39,162 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:39,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:39,377 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:39,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:39,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2020-12-23 00:56:39,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:39,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764977700] [2020-12-23 00:56:39,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:39,392 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:39,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912677113] [2020-12-23 00:56:39,392 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 00:56:39,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 00:56:39,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:39,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 00:56:39,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-23 00:56:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764977700] [2020-12-23 00:56:39,538 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:39,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912677113] [2020-12-23 00:56:39,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:39,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-23 00:56:39,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772065781] [2020-12-23 00:56:39,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 00:56:39,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 00:56:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:56:39,543 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2020-12-23 00:56:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:39,584 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2020-12-23 00:56:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 00:56:39,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-12-23 00:56:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:39,590 INFO L225 Difference]: With dead ends: 93 [2020-12-23 00:56:39,590 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 00:56:39,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 00:56:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 00:56:39,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2020-12-23 00:56:39,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 00:56:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2020-12-23 00:56:39,609 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2020-12-23 00:56:39,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:39,610 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2020-12-23 00:56:39,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 00:56:39,610 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2020-12-23 00:56:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 00:56:39,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:39,615 INFO L422 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:39,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 00:56:39,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:39,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:39,829 INFO L82 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2020-12-23 00:56:39,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:39,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24832004] [2020-12-23 00:56:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:39,841 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:39,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [706092399] [2020-12-23 00:56:39,842 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 00:56:39,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 00:56:39,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 00:56:39,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 00:56:39,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 00:56:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-12-23 00:56:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24832004] [2020-12-23 00:56:40,073 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-23 00:56:40,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706092399] [2020-12-23 00:56:40,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-23 00:56:40,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-23 00:56:40,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811874871] [2020-12-23 00:56:40,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 00:56:40,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 00:56:40,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 00:56:40,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 00:56:40,075 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 9 states. [2020-12-23 00:56:40,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 00:56:40,323 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2020-12-23 00:56:40,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 00:56:40,324 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-12-23 00:56:40,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 00:56:40,326 INFO L225 Difference]: With dead ends: 145 [2020-12-23 00:56:40,326 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 00:56:40,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-12-23 00:56:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 00:56:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2020-12-23 00:56:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 00:56:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2020-12-23 00:56:40,351 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2020-12-23 00:56:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 00:56:40,351 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-12-23 00:56:40,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 00:56:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2020-12-23 00:56:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 00:56:40,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 00:56:40,353 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 00:56:40,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 00:56:40,568 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 00:56:40,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 00:56:40,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2020-12-23 00:56:40,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 00:56:40,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397148101] [2020-12-23 00:56:40,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 00:56:40,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-23 00:56:40,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267394357] [2020-12-23 00:56:40,583 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