/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-multidimensional/min-2-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:50:51,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:50:51,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:50:51,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:50:51,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:50:51,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:50:51,459 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:50:51,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:50:51,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:50:51,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:50:51,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:50:51,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:50:51,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:50:51,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:50:51,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:50:51,489 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:50:51,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:50:51,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:50:51,521 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:50:51,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:50:51,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:50:51,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:50:51,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:50:51,538 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:50:51,547 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:50:51,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:50:51,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:50:51,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:50:51,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 10:50:51,618 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:50:51,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:50:51,623 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:50:51,624 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:50:51,624 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:50:51,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:50:51,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:50:51,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:50:51,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:50:51,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:50:51,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:50:51,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:50:51,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:50:51,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:50:51,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:50:51,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:50:51,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:50:51,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:50:51,628 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:50:51,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:50:51,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:50:51,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:50:51,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:50:51,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:50:51,630 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:50:51,630 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:50:52,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:50:52,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:50:52,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:50:52,104 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:50:52,105 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:50:52,106 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-2-u.c [2021-01-06 10:50:52,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dee69a8cc/1a5aa7edbf044ff3b2fd45683cc18045/FLAG25f798e0b [2021-01-06 10:50:52,975 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:50:52,975 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-2-u.c [2021-01-06 10:50:52,985 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dee69a8cc/1a5aa7edbf044ff3b2fd45683cc18045/FLAG25f798e0b [2021-01-06 10:50:53,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/dee69a8cc/1a5aa7edbf044ff3b2fd45683cc18045 [2021-01-06 10:50:53,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:50:53,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:50:53,320 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:50:53,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:50:53,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:50:53,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,328 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@288614d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53, skipping insertion in model container [2021-01-06 10:50:53,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:50:53,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:50:53,503 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-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[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~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,] [2021-01-06 10:50:53,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:50:53,539 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:50:53,554 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-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[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~min~0,] left hand side expression in assignment: lhs: VariableLHS[~j~0,] left hand side expression in assignment: lhs: VariableLHS[~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,] [2021-01-06 10:50:53,566 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:50:53,583 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:50:53,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53 WrapperNode [2021-01-06 10:50:53,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:50:53,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:50:53,586 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:50:53,586 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:50:53,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,604 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,627 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:50:53,628 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:50:53,629 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:50:53,629 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:50:53,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,656 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... [2021-01-06 10:50:53,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:50:53,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:50:53,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:50:53,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:50:53,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:50:53,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:50:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:50:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:50:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:50:53,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:50:53,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:50:53,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:50:54,217 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:50:54,218 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-01-06 10:50:54,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:50:54 BoogieIcfgContainer [2021-01-06 10:50:54,220 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:50:54,222 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:50:54,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:50:54,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:50:54,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:50:53" (1/3) ... [2021-01-06 10:50:54,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739d6448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:50:54, skipping insertion in model container [2021-01-06 10:50:54,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:50:53" (2/3) ... [2021-01-06 10:50:54,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@739d6448 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:50:54, skipping insertion in model container [2021-01-06 10:50:54,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:50:54" (3/3) ... [2021-01-06 10:50:54,235 INFO L111 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2021-01-06 10:50:54,252 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:50:54,263 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:50:54,313 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:50:54,364 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:50:54,364 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:50:54,364 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:50:54,364 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:50:54,365 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:50:54,365 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:50:54,365 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:50:54,365 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:50:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2021-01-06 10:50:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 10:50:54,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:54,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:50:54,392 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:54,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2021-01-06 10:50:54,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:54,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35974784] [2021-01-06 10:50:54,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:54,517 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:54,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879625840] [2021-01-06 10:50:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:50:54,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:50:54,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:54,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:50:54,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35974784] [2021-01-06 10:50:54,861 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:54,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879625840] [2021-01-06 10:50:54,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:50:54,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:50:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744754916] [2021-01-06 10:50:54,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:50:54,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:54,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:50:54,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:50:54,900 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2021-01-06 10:50:55,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:55,001 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2021-01-06 10:50:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:50:55,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 10:50:55,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:55,015 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:50:55,015 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 10:50:55,021 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 [2021-01-06 10:50:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 10:50:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2021-01-06 10:50:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:50:55,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-01-06 10:50:55,065 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2021-01-06 10:50:55,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:55,067 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-01-06 10:50:55,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:50:55,067 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-01-06 10:50:55,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 10:50:55,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:55,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:50:55,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 10:50:55,283 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2021-01-06 10:50:55,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:55,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496593650] [2021-01-06 10:50:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:55,298 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:55,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546658551] [2021-01-06 10:50:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:50:55,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:50:55,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:50:55,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496593650] [2021-01-06 10:50:55,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:55,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546658551] [2021-01-06 10:50:55,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:50:55,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:50:55,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698675779] [2021-01-06 10:50:55,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:50:55,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:50:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:50:55,474 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 4 states. [2021-01-06 10:50:55,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:55,587 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-01-06 10:50:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:50:55,589 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2021-01-06 10:50:55,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:55,590 INFO L225 Difference]: With dead ends: 49 [2021-01-06 10:50:55,590 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:50:55,591 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 [2021-01-06 10:50:55,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:50:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 10:50:55,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 10:50:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-01-06 10:50:55,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2021-01-06 10:50:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:55,600 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-01-06 10:50:55,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:50:55,600 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-01-06 10:50:55,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:50:55,601 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:55,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:50:55,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:55,818 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:55,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2021-01-06 10:50:55,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:55,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404092677] [2021-01-06 10:50:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:55,833 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:55,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783215126] [2021-01-06 10:50:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:50:55,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:50:55,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:56,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:50:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404092677] [2021-01-06 10:50:56,027 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:56,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783215126] [2021-01-06 10:50:56,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:56,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:50:56,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989986310] [2021-01-06 10:50:56,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:50:56,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:56,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:50:56,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:50:56,030 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 5 states. [2021-01-06 10:50:56,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:56,160 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2021-01-06 10:50:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:50:56,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 10:50:56,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:56,162 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:50:56,163 INFO L226 Difference]: Without dead ends: 41 [2021-01-06 10:50:56,163 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 [2021-01-06 10:50:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-01-06 10:50:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-01-06 10:50:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:50:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2021-01-06 10:50:56,172 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 14 [2021-01-06 10:50:56,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:56,173 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2021-01-06 10:50:56,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:50:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2021-01-06 10:50:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 10:50:56,174 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:56,174 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:50:56,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:56,390 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash -477019482, now seen corresponding path program 2 times [2021-01-06 10:50:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:56,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054180547] [2021-01-06 10:50:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:56,412 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:56,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751400454] [2021-01-06 10:50:56,414 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 [2021-01-06 10:50:56,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-01-06 10:50:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:50:56,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:50:56,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:50:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054180547] [2021-01-06 10:50:56,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:56,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751400454] [2021-01-06 10:50:56,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:50:56,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 10:50:56,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533856837] [2021-01-06 10:50:56,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:50:56,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:56,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:50:56,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:50:56,590 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 4 states. [2021-01-06 10:50:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:56,693 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-01-06 10:50:56,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:50:56,693 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 10:50:56,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:56,695 INFO L225 Difference]: With dead ends: 66 [2021-01-06 10:50:56,695 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 10:50:56,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:50:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 10:50:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 31. [2021-01-06 10:50:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-01-06 10:50:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2021-01-06 10:50:56,704 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 15 [2021-01-06 10:50:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:56,705 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2021-01-06 10:50:56,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:50:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2021-01-06 10:50:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:50:56,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:56,706 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] [2021-01-06 10:50:56,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:56,922 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:56,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:56,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1114279158, now seen corresponding path program 1 times [2021-01-06 10:50:56,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:56,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429733327] [2021-01-06 10:50:56,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:56,935 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:56,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978642239] [2021-01-06 10:50:56,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:50:57,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:50:57,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-01-06 10:50:57,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429733327] [2021-01-06 10:50:57,132 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:57,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978642239] [2021-01-06 10:50:57,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:57,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:50:57,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611036994] [2021-01-06 10:50:57,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:50:57,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:57,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:50:57,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:50:57,134 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 6 states. [2021-01-06 10:50:57,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:57,278 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2021-01-06 10:50:57,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:50:57,278 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2021-01-06 10:50:57,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:57,279 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:50:57,280 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:50:57,281 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 [2021-01-06 10:50:57,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:50:57,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2021-01-06 10:50:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:50:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2021-01-06 10:50:57,290 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 24 [2021-01-06 10:50:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:57,290 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2021-01-06 10:50:57,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:50:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2021-01-06 10:50:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 10:50:57,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:57,292 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] [2021-01-06 10:50:57,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:57,507 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:57,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1632092484, now seen corresponding path program 2 times [2021-01-06 10:50:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:57,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051333888] [2021-01-06 10:50:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:57,525 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:57,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931087437] [2021-01-06 10:50:57,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:57,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:50:57,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:50:57,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:50:57,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:57,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-01-06 10:50:57,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051333888] [2021-01-06 10:50:57,762 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:57,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931087437] [2021-01-06 10:50:57,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:57,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:50:57,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66926595] [2021-01-06 10:50:57,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:50:57,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:57,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:50:57,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:50:57,764 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand 7 states. [2021-01-06 10:50:57,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:57,897 INFO L93 Difference]: Finished difference Result 93 states and 116 transitions. [2021-01-06 10:50:57,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:50:57,898 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2021-01-06 10:50:57,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:57,899 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:50:57,899 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:50:57,900 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 [2021-01-06 10:50:57,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:50:57,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2021-01-06 10:50:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 10:50:57,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2021-01-06 10:50:57,909 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 28 [2021-01-06 10:50:57,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:57,910 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2021-01-06 10:50:57,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:50:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2021-01-06 10:50:57,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 10:50:57,911 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:57,911 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] [2021-01-06 10:50:58,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:58,126 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 3 times [2021-01-06 10:50:58,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:58,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505629615] [2021-01-06 10:50:58,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:58,140 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:58,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486140260] [2021-01-06 10:50:58,141 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 [2021-01-06 10:50:58,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 10:50:58,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:50:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:50:58,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-01-06 10:50:58,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505629615] [2021-01-06 10:50:58,298 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486140260] [2021-01-06 10:50:58,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:58,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-01-06 10:50:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761326787] [2021-01-06 10:50:58,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 10:50:58,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:58,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 10:50:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:50:58,301 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand 4 states. [2021-01-06 10:50:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:58,343 INFO L93 Difference]: Finished difference Result 93 states and 118 transitions. [2021-01-06 10:50:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:50:58,344 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-01-06 10:50:58,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:58,347 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:50:58,347 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 10:50:58,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 10:50:58,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 10:50:58,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2021-01-06 10:50:58,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 10:50:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2021-01-06 10:50:58,358 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 32 [2021-01-06 10:50:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:58,358 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2021-01-06 10:50:58,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 10:50:58,359 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2021-01-06 10:50:58,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:50:58,360 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:58,360 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] [2021-01-06 10:50:58,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:50:58,570 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:58,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:58,571 INFO L82 PathProgramCache]: Analyzing trace with hash -709845727, now seen corresponding path program 4 times [2021-01-06 10:50:58,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:58,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209774462] [2021-01-06 10:50:58,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:58,593 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:58,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [289636794] [2021-01-06 10:50:58,594 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 [2021-01-06 10:50:58,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:50:58,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:50:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:50:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:50:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 10:50:58,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209774462] [2021-01-06 10:50:58,810 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:50:58,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289636794] [2021-01-06 10:50:58,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:50:58,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:50:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708803010] [2021-01-06 10:50:58,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:50:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:50:58,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:50:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:50:58,813 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand 9 states. [2021-01-06 10:50:59,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:50:59,020 INFO L93 Difference]: Finished difference Result 145 states and 179 transitions. [2021-01-06 10:50:59,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:50:59,021 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2021-01-06 10:50:59,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:50:59,022 INFO L225 Difference]: With dead ends: 145 [2021-01-06 10:50:59,022 INFO L226 Difference]: Without dead ends: 127 [2021-01-06 10:50:59,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:50:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-01-06 10:50:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2021-01-06 10:50:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 10:50:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-01-06 10:50:59,036 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 39 [2021-01-06 10:50:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:50:59,037 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-01-06 10:50:59,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:50:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-01-06 10:50:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:50:59,038 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:50:59,039 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] [2021-01-06 10:50:59,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-01-06 10:50:59,249 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:50:59,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:50:59,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1528313637, now seen corresponding path program 5 times [2021-01-06 10:50:59,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:50:59,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412497866] [2021-01-06 10:50:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:50:59,260 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:50:59,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436544581] [2021-01-06 10:50:59,261 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