/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-industry-pattern/array_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:05:52,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:05:52,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:05:52,622 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:05:52,623 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:05:52,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:05:52,627 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:05:52,629 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:05:52,632 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:05:52,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:05:52,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:05:52,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:05:52,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:05:52,638 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:05:52,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:05:52,641 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:05:52,662 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:05:52,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:05:52,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:05:52,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:05:52,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:05:52,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:05:52,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:05:52,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:05:52,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 10:05:52,685 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 10:05:52,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 10:05:52,687 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 10:05:52,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 10:05:52,689 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 10:05:52,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 10:05:52,690 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 10:05:52,691 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 10:05:52,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 10:05:52,693 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 10:05:52,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 10:05:52,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 10:05:52,695 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 10:05:52,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:05:52,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:05:52,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:05:52,699 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 10:05:52,728 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:05:52,728 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:05:52,730 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:05:52,731 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:05:52,731 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:05:52,731 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:05:52,732 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:05:52,732 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:05:52,732 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:05:52,732 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:05:52,733 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:05:52,733 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:05:52,733 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:05:52,733 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:05:52,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:05:52,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:05:52,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:05:52,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:05:52,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:05:52,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:05:52,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:05:52,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:05:52,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:05:52,736 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:05:52,736 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:05:52,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:05:53,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:05:53,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:05:53,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:05:53,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:05:53,264 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:05:53,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2021-01-06 10:05:53,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d3edd47e4/f66718a0f2a34ec29df995d125eab0f9/FLAGe590de454 [2021-01-06 10:05:54,156 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:05:54,157 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_mul_init.i [2021-01-06 10:05:54,165 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d3edd47e4/f66718a0f2a34ec29df995d125eab0f9/FLAGe590de454 [2021-01-06 10:05:54,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/d3edd47e4/f66718a0f2a34ec29df995d125eab0f9 [2021-01-06 10:05:54,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:05:54,481 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:05:54,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:54,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:05:54,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:05:54,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,491 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774c0faf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54, skipping insertion in model container [2021-01-06 10:05:54,491 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:05:54,521 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:05:54,692 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-industry-pattern/array_mul_init.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:05:54,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:54,724 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:05:54,740 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-industry-pattern/array_mul_init.i[807,820] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:05:54,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:05:54,772 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:05:54,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54 WrapperNode [2021-01-06 10:05:54,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:05:54,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:54,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:05:54,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:05:54,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,825 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:05:54,826 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:05:54,826 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:05:54,826 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:05:54,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,853 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (1/1) ... [2021-01-06 10:05:54,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:05:54,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:05:54,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:05:54,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:05:54,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (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 10:05:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:05:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:05:54,963 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:05:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:05:54,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:05:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:05:54,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:05:55,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:05:55,328 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 10:05:55,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:55 BoogieIcfgContainer [2021-01-06 10:05:55,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:05:55,342 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:05:55,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:05:55,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:05:55,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:05:54" (1/3) ... [2021-01-06 10:05:55,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4c8e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:55, skipping insertion in model container [2021-01-06 10:05:55,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:05:54" (2/3) ... [2021-01-06 10:05:55,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4c8e8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:05:55, skipping insertion in model container [2021-01-06 10:05:55,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:05:55" (3/3) ... [2021-01-06 10:05:55,369 INFO L111 eAbstractionObserver]: Analyzing ICFG array_mul_init.i [2021-01-06 10:05:55,392 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:05:55,408 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:05:55,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:05:55,469 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:05:55,469 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:05:55,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:05:55,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:05:55,470 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:05:55,470 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:05:55,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:05:55,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:05:55,491 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:05:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:05:55,498 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:55,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:55,500 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:55,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash 542545282, now seen corresponding path program 1 times [2021-01-06 10:05:55,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:55,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532063578] [2021-01-06 10:05:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:55,795 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 10:05:55,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532063578] [2021-01-06 10:05:55,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:55,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:05:55,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557838127] [2021-01-06 10:05:55,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:05:55,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:55,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:05:55,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:05:55,834 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:05:55,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:55,861 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-01-06 10:05:55,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:05:55,863 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2021-01-06 10:05:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:55,892 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:05:55,893 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:05:55,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:05:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:05:55,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:05:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:05:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 10:05:55,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2021-01-06 10:05:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:55,950 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 10:05:55,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:05:55,951 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 10:05:55,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 10:05:55,953 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:55,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:55,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:05:55,955 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:55,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:55,960 INFO L82 PathProgramCache]: Analyzing trace with hash -630060617, now seen corresponding path program 1 times [2021-01-06 10:05:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:55,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648162949] [2021-01-06 10:05:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,031 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 10:05:56,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648162949] [2021-01-06 10:05:56,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:05:56,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:05:56,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751142201] [2021-01-06 10:05:56,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:05:56,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:56,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:05:56,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:05:56,036 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2021-01-06 10:05:56,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:56,116 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-01-06 10:05:56,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:05:56,117 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2021-01-06 10:05:56,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:56,118 INFO L225 Difference]: With dead ends: 43 [2021-01-06 10:05:56,118 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:05:56,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 10:05:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:05:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2021-01-06 10:05:56,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:05:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-01-06 10:05:56,126 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2021-01-06 10:05:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:56,126 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-01-06 10:05:56,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:05:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-01-06 10:05:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 10:05:56,128 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:56,128 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:56,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:05:56,128 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:56,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:56,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2036151027, now seen corresponding path program 1 times [2021-01-06 10:05:56,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:56,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066795048] [2021-01-06 10:05:56,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:05:56,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066795048] [2021-01-06 10:05:56,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349782098] [2021-01-06 10:05:56,207 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 10:05:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:05:56,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:05:56,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:05:56,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:05:56,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:05:56,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724970615] [2021-01-06 10:05:56,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:05:56,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:56,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:05:56,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:56,355 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2021-01-06 10:05:56,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:56,428 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-01-06 10:05:56,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:05:56,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2021-01-06 10:05:56,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:56,430 INFO L225 Difference]: With dead ends: 57 [2021-01-06 10:05:56,431 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 10:05:56,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 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 10:05:56,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 10:05:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2021-01-06 10:05:56,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:05:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-01-06 10:05:56,438 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-01-06 10:05:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:56,439 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-01-06 10:05:56,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:05:56,439 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-01-06 10:05:56,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 10:05:56,440 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:56,440 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:56,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 10:05:56,654 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:56,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:56,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1468366451, now seen corresponding path program 2 times [2021-01-06 10:05:56,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:56,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749440625] [2021-01-06 10:05:56,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:56,681 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:05:56,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [414421808] [2021-01-06 10:05:56,682 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 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 10:05:56,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:05:56,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:56,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:05:56,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 10:05:56,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749440625] [2021-01-06 10:05:56,849 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:05:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414421808] [2021-01-06 10:05:56,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:05:56,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-01-06 10:05:56,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097636134] [2021-01-06 10:05:56,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:05:56,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:56,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:05:56,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:05:56,855 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2021-01-06 10:05:56,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:56,943 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2021-01-06 10:05:56,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:05:56,944 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2021-01-06 10:05:56,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:56,946 INFO L225 Difference]: With dead ends: 73 [2021-01-06 10:05:56,946 INFO L226 Difference]: Without dead ends: 56 [2021-01-06 10:05:56,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 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 10:05:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-01-06 10:05:56,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2021-01-06 10:05:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2021-01-06 10:05:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-01-06 10:05:56,954 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2021-01-06 10:05:56,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:56,955 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-01-06 10:05:56,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:05:56,955 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2021-01-06 10:05:56,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 10:05:56,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:56,956 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:57,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:57,171 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:57,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:57,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1638808119, now seen corresponding path program 3 times [2021-01-06 10:05:57,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:57,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771167389] [2021-01-06 10:05:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:57,191 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:05:57,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542250766] [2021-01-06 10:05:57,192 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 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 10:05:57,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:05:57,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:57,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:05:57,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:57,361 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 10:05:57,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771167389] [2021-01-06 10:05:57,362 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:05:57,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542250766] [2021-01-06 10:05:57,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:05:57,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-01-06 10:05:57,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930669832] [2021-01-06 10:05:57,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:05:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:57,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:05:57,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:57,365 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2021-01-06 10:05:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:57,472 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2021-01-06 10:05:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:05:57,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 10:05:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:57,475 INFO L225 Difference]: With dead ends: 89 [2021-01-06 10:05:57,476 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 10:05:57,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:05:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 10:05:57,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2021-01-06 10:05:57,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:05:57,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-01-06 10:05:57,493 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2021-01-06 10:05:57,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:57,495 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-01-06 10:05:57,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:05:57,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-01-06 10:05:57,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-01-06 10:05:57,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:57,498 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:57,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:57,713 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1366955217, now seen corresponding path program 4 times [2021-01-06 10:05:57,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:57,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467940602] [2021-01-06 10:05:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:57,733 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:05:57,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [449462688] [2021-01-06 10:05:57,734 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 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 10:05:57,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:05:57,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:05:57,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:05:57,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:05:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 10:05:57,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467940602] [2021-01-06 10:05:57,950 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:05:57,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449462688] [2021-01-06 10:05:57,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:05:57,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-01-06 10:05:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786878372] [2021-01-06 10:05:57,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:05:57,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:05:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:05:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:05:57,961 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2021-01-06 10:05:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:05:58,094 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2021-01-06 10:05:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:05:58,094 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-01-06 10:05:58,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:05:58,096 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:05:58,096 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 10:05:58,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 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 10:05:58,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 10:05:58,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 39. [2021-01-06 10:05:58,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 10:05:58,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-01-06 10:05:58,105 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2021-01-06 10:05:58,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:05:58,105 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-01-06 10:05:58,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:05:58,105 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-01-06 10:05:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 10:05:58,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:05:58,107 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:05:58,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:05:58,315 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:05:58,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:05:58,316 INFO L82 PathProgramCache]: Analyzing trace with hash 684091771, now seen corresponding path program 5 times [2021-01-06 10:05:58,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:05:58,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358375019] [2021-01-06 10:05:58,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:05:58,339 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:05:58,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1216863554] [2021-01-06 10:05:58,339 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 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 10:06:00,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:06:00,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:00,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:06:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 10:06:00,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358375019] [2021-01-06 10:06:00,945 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:06:00,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216863554] [2021-01-06 10:06:00,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:06:00,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-01-06 10:06:00,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659992980] [2021-01-06 10:06:00,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:06:00,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:00,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:06:00,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:00,948 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2021-01-06 10:06:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:01,129 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2021-01-06 10:06:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:06:01,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2021-01-06 10:06:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:01,131 INFO L225 Difference]: With dead ends: 121 [2021-01-06 10:06:01,131 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 10:06:01,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 10:06:01,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 44. [2021-01-06 10:06:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 10:06:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-01-06 10:06:01,141 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 36 [2021-01-06 10:06:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:01,142 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-01-06 10:06:01,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:06:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-01-06 10:06:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 10:06:01,143 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:01,144 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:01,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 10:06:01,359 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:01,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:01,360 INFO L82 PathProgramCache]: Analyzing trace with hash -41218069, now seen corresponding path program 6 times [2021-01-06 10:06:01,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:01,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808396760] [2021-01-06 10:06:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:01,383 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:06:01,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2144146676] [2021-01-06 10:06:01,384 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:06:01,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:06:01,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:01,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:06:01,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:02,142 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 10:06:02,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808396760] [2021-01-06 10:06:02,142 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:06:02,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144146676] [2021-01-06 10:06:02,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:06:02,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-01-06 10:06:02,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316266741] [2021-01-06 10:06:02,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:06:02,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:02,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:06:02,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:02,152 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 9 states. [2021-01-06 10:06:02,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:02,338 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2021-01-06 10:06:02,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:06:02,338 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2021-01-06 10:06:02,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:02,339 INFO L225 Difference]: With dead ends: 137 [2021-01-06 10:06:02,339 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 10:06:02,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:02,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 10:06:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2021-01-06 10:06:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 10:06:02,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2021-01-06 10:06:02,348 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 41 [2021-01-06 10:06:02,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:02,349 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2021-01-06 10:06:02,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:06:02,349 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2021-01-06 10:06:02,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 10:06:02,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:02,350 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:02,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:02,557 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1441922881, now seen corresponding path program 7 times [2021-01-06 10:06:02,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:02,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227100715] [2021-01-06 10:06:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:02,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:06:02,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409530685] [2021-01-06 10:06:02,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:06:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:06:02,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-01-06 10:06:02,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227100715] [2021-01-06 10:06:02,786 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:06:02,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409530685] [2021-01-06 10:06:02,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:06:02,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-01-06 10:06:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898047152] [2021-01-06 10:06:02,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:06:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:06:02,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:02,789 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 10 states. [2021-01-06 10:06:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:02,979 INFO L93 Difference]: Finished difference Result 153 states and 184 transitions. [2021-01-06 10:06:02,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:06:02,980 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2021-01-06 10:06:02,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:02,981 INFO L225 Difference]: With dead ends: 153 [2021-01-06 10:06:02,982 INFO L226 Difference]: Without dead ends: 121 [2021-01-06 10:06:02,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-01-06 10:06:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2021-01-06 10:06:02,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 10:06:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2021-01-06 10:06:02,990 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 46 [2021-01-06 10:06:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:02,991 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2021-01-06 10:06:02,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:06:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2021-01-06 10:06:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 10:06:02,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:02,993 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:03,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:03,207 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:03,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1095979865, now seen corresponding path program 8 times [2021-01-06 10:06:03,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:03,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674607891] [2021-01-06 10:06:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:03,231 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:06:03,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327884514] [2021-01-06 10:06:03,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:03,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:03,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:03,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:06:03,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-01-06 10:06:03,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674607891] [2021-01-06 10:06:03,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-01-06 10:06:03,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327884514] [2021-01-06 10:06:03,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:06:03,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-01-06 10:06:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445337741] [2021-01-06 10:06:03,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:06:03,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:03,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:06:03,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:03,468 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 11 states. [2021-01-06 10:06:03,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:03,662 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2021-01-06 10:06:03,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:06:03,666 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2021-01-06 10:06:03,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:03,667 INFO L225 Difference]: With dead ends: 169 [2021-01-06 10:06:03,667 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 10:06:03,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:03,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 10:06:03,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 59. [2021-01-06 10:06:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 10:06:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2021-01-06 10:06:03,693 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 51 [2021-01-06 10:06:03,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:03,693 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2021-01-06 10:06:03,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:06:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2021-01-06 10:06:03,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-01-06 10:06:03,700 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:03,700 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:03,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:06:03,917 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:03,918 INFO L82 PathProgramCache]: Analyzing trace with hash -957530109, now seen corresponding path program 9 times [2021-01-06 10:06:03,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:03,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982566746] [2021-01-06 10:06:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:03,940 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-01-06 10:06:03,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388708444] [2021-01-06 10:06:03,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true