/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-examples/standard_running-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:57:08,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:57:08,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:57:08,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:57:08,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:57:08,823 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:57:08,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:57:08,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:57:08,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:57:08,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:57:08,847 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:57:08,849 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:57:08,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:57:08,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:57:08,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:57:08,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:57:08,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:57:08,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:57:08,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:57:08,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:57:08,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:57:08,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:57:08,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:57:08,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:57:08,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 09:57:08,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 09:57:08,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 09:57:08,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 09:57:08,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 09:57:08,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 09:57:08,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 09:57:08,923 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 09:57:08,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 09:57:08,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 09:57:08,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 09:57:08,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 09:57:08,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 09:57:08,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 09:57:08,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:57:08,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:57:08,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:57:08,940 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 09:57:08,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:57:08,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:57:08,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:57:08,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:57:08,996 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:57:08,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:57:08,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:57:08,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:57:08,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:57:08,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:57:08,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:57:08,999 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:57:08,999 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:57:09,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:57:09,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:57:09,000 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:57:09,000 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:57:09,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:57:09,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:57:09,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:57:09,001 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:57:09,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:57:09,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:57:09,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:57:09,002 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:57:09,002 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:57:09,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:57:09,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:57:09,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:57:09,481 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:57:09,482 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:57:09,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_running-2.i [2021-01-06 09:57:09,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b3f27357f/3ed23b608aee4e57be32172724ee7857/FLAG1c92ab518 [2021-01-06 09:57:10,246 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:57:10,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_running-2.i [2021-01-06 09:57:10,255 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b3f27357f/3ed23b608aee4e57be32172724ee7857/FLAG1c92ab518 [2021-01-06 09:57:10,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/b3f27357f/3ed23b608aee4e57be32172724ee7857 [2021-01-06 09:57:10,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:57:10,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:57:10,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:10,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:57:10,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:57:10,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bb07af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10, skipping insertion in model container [2021-01-06 09:57:10,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:57:10,656 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:57:10,822 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-examples/standard_running-2.i[811,824] 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: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~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[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 09:57:10,844 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:10,854 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:57:10,870 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-examples/standard_running-2.i[811,824] 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: lhs: VariableLHS[~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: 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[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~f~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 09:57:10,881 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:57:10,904 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:57:10,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10 WrapperNode [2021-01-06 09:57:10,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:57:10,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:10,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:57:10,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:57:10,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,925 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:57:10,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:57:10,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:57:10,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:57:10,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (1/1) ... [2021-01-06 09:57:10,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:57:10,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:57:10,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:57:10,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:57:10,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (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 09:57:11,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:57:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:57:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:57:11,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:57:11,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:57:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:57:11,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:57:11,627 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:57:11,627 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:57:11,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:11 BoogieIcfgContainer [2021-01-06 09:57:11,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:57:11,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:57:11,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:57:11,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:57:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:57:10" (1/3) ... [2021-01-06 09:57:11,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4411cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:11, skipping insertion in model container [2021-01-06 09:57:11,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:57:10" (2/3) ... [2021-01-06 09:57:11,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b4411cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:57:11, skipping insertion in model container [2021-01-06 09:57:11,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:57:11" (3/3) ... [2021-01-06 09:57:11,641 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2021-01-06 09:57:11,650 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:57:11,656 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:57:11,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:57:11,741 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:57:11,743 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:57:11,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:57:11,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:57:11,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:57:11,744 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:57:11,744 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:57:11,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:57:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-01-06 09:57:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:57:11,782 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:11,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:11,783 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:11,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:11,792 INFO L82 PathProgramCache]: Analyzing trace with hash -2030235279, now seen corresponding path program 1 times [2021-01-06 09:57:11,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:11,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760953688] [2021-01-06 09:57:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,037 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 09:57:12,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760953688] [2021-01-06 09:57:12,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:12,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 09:57:12,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138736575] [2021-01-06 09:57:12,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 09:57:12,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 09:57:12,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 09:57:12,072 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2021-01-06 09:57:12,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:12,090 INFO L93 Difference]: Finished difference Result 44 states and 64 transitions. [2021-01-06 09:57:12,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 09:57:12,092 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 09:57:12,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:12,102 INFO L225 Difference]: With dead ends: 44 [2021-01-06 09:57:12,102 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 09:57:12,106 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 09:57:12,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 09:57:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 09:57:12,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 09:57:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-01-06 09:57:12,144 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 10 [2021-01-06 09:57:12,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:12,145 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-01-06 09:57:12,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 09:57:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-01-06 09:57:12,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 09:57:12,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:12,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:12,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:57:12,146 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:12,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:12,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1948917626, now seen corresponding path program 1 times [2021-01-06 09:57:12,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:12,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615035226] [2021-01-06 09:57:12,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:12,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,203 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 09:57:12,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615035226] [2021-01-06 09:57:12,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:12,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:57:12,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270397989] [2021-01-06 09:57:12,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:57:12,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:57:12,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:57:12,208 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand 3 states. [2021-01-06 09:57:12,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:12,280 INFO L93 Difference]: Finished difference Result 48 states and 69 transitions. [2021-01-06 09:57:12,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:57:12,281 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 09:57:12,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:12,282 INFO L225 Difference]: With dead ends: 48 [2021-01-06 09:57:12,282 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 09:57:12,283 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 09:57:12,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 09:57:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-01-06 09:57:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 09:57:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2021-01-06 09:57:12,290 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2021-01-06 09:57:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:12,290 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-01-06 09:57:12,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:57:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2021-01-06 09:57:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 09:57:12,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:12,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:12,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 09:57:12,292 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:12,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:12,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1221461665, now seen corresponding path program 1 times [2021-01-06 09:57:12,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:12,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243861830] [2021-01-06 09:57:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:12,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:57:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243861830] [2021-01-06 09:57:12,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271815851] [2021-01-06 09:57:12,345 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 09:57:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:12,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:57:12,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 09:57:12,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:12,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:57:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538999201] [2021-01-06 09:57:12,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:12,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:12,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:12,554 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 5 states. [2021-01-06 09:57:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:12,753 INFO L93 Difference]: Finished difference Result 62 states and 88 transitions. [2021-01-06 09:57:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:57:12,754 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2021-01-06 09:57:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:12,765 INFO L225 Difference]: With dead ends: 62 [2021-01-06 09:57:12,765 INFO L226 Difference]: Without dead ends: 44 [2021-01-06 09:57:12,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 09:57:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-01-06 09:57:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-01-06 09:57:12,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 09:57:12,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2021-01-06 09:57:12,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 22 [2021-01-06 09:57:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:12,787 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2021-01-06 09:57:12,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2021-01-06 09:57:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:57:12,790 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:12,791 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:13,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 09:57:13,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash 36788574, now seen corresponding path program 2 times [2021-01-06 09:57:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:13,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220488980] [2021-01-06 09:57:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:13,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-01-06 09:57:13,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220488980] [2021-01-06 09:57:13,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:13,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 09:57:13,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608150362] [2021-01-06 09:57:13,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:13,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:13,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:13,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:13,226 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 5 states. [2021-01-06 09:57:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:13,362 INFO L93 Difference]: Finished difference Result 60 states and 82 transitions. [2021-01-06 09:57:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:13,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 09:57:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:13,364 INFO L225 Difference]: With dead ends: 60 [2021-01-06 09:57:13,364 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 09:57:13,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 09:57:13,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-01-06 09:57:13,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 09:57:13,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-01-06 09:57:13,380 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 34 [2021-01-06 09:57:13,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:13,380 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-01-06 09:57:13,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2021-01-06 09:57:13,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:57:13,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:13,382 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:13,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 09:57:13,383 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:13,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:13,384 INFO L82 PathProgramCache]: Analyzing trace with hash -492759138, now seen corresponding path program 1 times [2021-01-06 09:57:13,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:13,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377761465] [2021-01-06 09:57:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 09:57:13,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377761465] [2021-01-06 09:57:13,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:57:13,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 09:57:13,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343887219] [2021-01-06 09:57:13,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:57:13,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:13,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:57:13,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:57:13,493 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand 5 states. [2021-01-06 09:57:13,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:13,576 INFO L93 Difference]: Finished difference Result 69 states and 93 transitions. [2021-01-06 09:57:13,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:13,577 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2021-01-06 09:57:13,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:13,580 INFO L225 Difference]: With dead ends: 69 [2021-01-06 09:57:13,581 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 09:57:13,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:13,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 09:57:13,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-01-06 09:57:13,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 09:57:13,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2021-01-06 09:57:13,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 34 [2021-01-06 09:57:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:13,605 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2021-01-06 09:57:13,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:57:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2021-01-06 09:57:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 09:57:13,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:13,608 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:13,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 09:57:13,609 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:13,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:13,610 INFO L82 PathProgramCache]: Analyzing trace with hash 271130974, now seen corresponding path program 1 times [2021-01-06 09:57:13,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:13,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987040694] [2021-01-06 09:57:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:13,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 09:57:13,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987040694] [2021-01-06 09:57:13,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718739883] [2021-01-06 09:57:13,676 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 09:57:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:57:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-01-06 09:57:13,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:13,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:57:13,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098713097] [2021-01-06 09:57:13,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:57:13,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:13,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:57:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:13,811 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand 6 states. [2021-01-06 09:57:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:13,919 INFO L93 Difference]: Finished difference Result 108 states and 150 transitions. [2021-01-06 09:57:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:57:13,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2021-01-06 09:57:13,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:13,921 INFO L225 Difference]: With dead ends: 108 [2021-01-06 09:57:13,921 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 09:57:13,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:57:13,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 09:57:13,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2021-01-06 09:57:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 09:57:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2021-01-06 09:57:13,929 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2021-01-06 09:57:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:13,929 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2021-01-06 09:57:13,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:57:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2021-01-06 09:57:13,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 09:57:13,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:13,931 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:14,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:14,146 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:14,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:14,147 INFO L82 PathProgramCache]: Analyzing trace with hash 984188611, now seen corresponding path program 2 times [2021-01-06 09:57:14,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:14,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079796900] [2021-01-06 09:57:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:14,217 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:57:14,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079796900] [2021-01-06 09:57:14,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549311201] [2021-01-06 09:57:14,218 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 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 09:57:14,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:14,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:14,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:57:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:14,380 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:57:14,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:14,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:57:14,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226972621] [2021-01-06 09:57:14,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:57:14,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:14,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:57:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:57:14,383 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 7 states. [2021-01-06 09:57:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:14,534 INFO L93 Difference]: Finished difference Result 138 states and 192 transitions. [2021-01-06 09:57:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:57:14,535 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2021-01-06 09:57:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:14,536 INFO L225 Difference]: With dead ends: 138 [2021-01-06 09:57:14,536 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 09:57:14,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:57:14,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 09:57:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-01-06 09:57:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 09:57:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2021-01-06 09:57:14,546 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 46 [2021-01-06 09:57:14,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:14,546 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2021-01-06 09:57:14,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:57:14,546 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2021-01-06 09:57:14,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 09:57:14,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:14,548 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:14,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:14,764 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:14,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:14,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1354664638, now seen corresponding path program 3 times [2021-01-06 09:57:14,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:14,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103613701] [2021-01-06 09:57:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:14,863 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-01-06 09:57:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103613701] [2021-01-06 09:57:14,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998362900] [2021-01-06 09:57:14,864 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 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 09:57:14,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:57:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:14,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:57:14,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:15,019 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:15,020 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:15,027 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:15,028 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:15,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 09:57:15,331 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:15,336 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:15,362 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:15,363 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 24 [2021-01-06 09:57:15,365 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:15,368 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:15,376 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:15,377 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-01-06 09:57:15,379 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:15,422 INFO L625 ElimStorePlain]: treesize reduction 1, result has 96.9 percent of original size [2021-01-06 09:57:15,426 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-01-06 09:57:15,427 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:69, output treesize:18 [2021-01-06 09:57:15,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 09:57:15,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:15,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-01-06 09:57:15,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143983626] [2021-01-06 09:57:15,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:57:15,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:15,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:57:15,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:57:15,530 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 14 states. [2021-01-06 09:57:16,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:16,408 INFO L93 Difference]: Finished difference Result 290 states and 416 transitions. [2021-01-06 09:57:16,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 09:57:16,408 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 58 [2021-01-06 09:57:16,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:16,411 INFO L225 Difference]: With dead ends: 290 [2021-01-06 09:57:16,412 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 09:57:16,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 09:57:16,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 09:57:16,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 204. [2021-01-06 09:57:16,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2021-01-06 09:57:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 285 transitions. [2021-01-06 09:57:16,432 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 285 transitions. Word has length 58 [2021-01-06 09:57:16,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:16,432 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 285 transitions. [2021-01-06 09:57:16,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:57:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 285 transitions. [2021-01-06 09:57:16,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 09:57:16,435 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:16,435 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:16,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:16,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:16,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:16,652 INFO L82 PathProgramCache]: Analyzing trace with hash -937413107, now seen corresponding path program 1 times [2021-01-06 09:57:16,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:16,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437064642] [2021-01-06 09:57:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:16,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:16,792 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:57:16,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437064642] [2021-01-06 09:57:16,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425102153] [2021-01-06 09:57:16,792 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 09:57:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:16,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:57:16,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-01-06 09:57:16,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:16,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:57:16,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87601233] [2021-01-06 09:57:16,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:57:16,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:57:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:16,998 INFO L87 Difference]: Start difference. First operand 204 states and 285 transitions. Second operand 11 states. [2021-01-06 09:57:17,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:17,255 INFO L93 Difference]: Finished difference Result 472 states and 660 transitions. [2021-01-06 09:57:17,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:57:17,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 94 [2021-01-06 09:57:17,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:17,258 INFO L225 Difference]: With dead ends: 472 [2021-01-06 09:57:17,258 INFO L226 Difference]: Without dead ends: 285 [2021-01-06 09:57:17,259 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:57:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-01-06 09:57:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2021-01-06 09:57:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2021-01-06 09:57:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 323 transitions. [2021-01-06 09:57:17,277 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 323 transitions. Word has length 94 [2021-01-06 09:57:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:17,278 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 323 transitions. [2021-01-06 09:57:17,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:57:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 323 transitions. [2021-01-06 09:57:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 09:57:17,285 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:17,285 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:17,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:17,499 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:17,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:17,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1234891020, now seen corresponding path program 2 times [2021-01-06 09:57:17,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:17,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263927196] [2021-01-06 09:57:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-01-06 09:57:17,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263927196] [2021-01-06 09:57:17,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432280373] [2021-01-06 09:57:17,720 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 09:57:17,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:57:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:17,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:57:17,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2021-01-06 09:57:17,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:17,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:57:17,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964275514] [2021-01-06 09:57:17,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:57:17,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:17,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:57:17,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:17,932 INFO L87 Difference]: Start difference. First operand 231 states and 323 transitions. Second operand 12 states. [2021-01-06 09:57:18,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:18,178 INFO L93 Difference]: Finished difference Result 524 states and 734 transitions. [2021-01-06 09:57:18,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:57:18,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 106 [2021-01-06 09:57:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:18,181 INFO L225 Difference]: With dead ends: 524 [2021-01-06 09:57:18,181 INFO L226 Difference]: Without dead ends: 312 [2021-01-06 09:57:18,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:57:18,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-01-06 09:57:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 258. [2021-01-06 09:57:18,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2021-01-06 09:57:18,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 361 transitions. [2021-01-06 09:57:18,212 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 361 transitions. Word has length 106 [2021-01-06 09:57:18,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:18,212 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 361 transitions. [2021-01-06 09:57:18,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:57:18,212 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 361 transitions. [2021-01-06 09:57:18,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-01-06 09:57:18,226 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:18,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:18,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:18,441 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:18,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -967925327, now seen corresponding path program 3 times [2021-01-06 09:57:18,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:18,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758800902] [2021-01-06 09:57:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-01-06 09:57:18,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758800902] [2021-01-06 09:57:18,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124974244] [2021-01-06 09:57:18,668 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 09:57:18,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 09:57:18,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:18,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:18,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:18,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:18,853 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:18,855 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:18,855 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:18,942 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 09:57:18,942 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 09:57:18,946 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:18,954 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:18,956 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:18,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2021-01-06 09:57:19,362 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:19,366 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 09:57:19,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:19,397 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:19,398 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 43 [2021-01-06 09:57:19,400 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:19,427 INFO L348 Elim1Store]: treesize reduction 17, result has 66.7 percent of original size [2021-01-06 09:57:19,428 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 44 [2021-01-06 09:57:19,430 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:19,431 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:19,435 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:19,472 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.2 percent of original size [2021-01-06 09:57:19,478 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 09:57:19,478 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:87, output treesize:17 [2021-01-06 09:57:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 39 proven. 101 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-01-06 09:57:19,707 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:19,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-01-06 09:57:19,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553472375] [2021-01-06 09:57:19,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:57:19,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:19,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:57:19,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:57:19,710 INFO L87 Difference]: Start difference. First operand 258 states and 361 transitions. Second operand 23 states. [2021-01-06 09:57:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:23,501 INFO L93 Difference]: Finished difference Result 890 states and 1256 transitions. [2021-01-06 09:57:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-01-06 09:57:23,502 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2021-01-06 09:57:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:23,506 INFO L225 Difference]: With dead ends: 890 [2021-01-06 09:57:23,506 INFO L226 Difference]: Without dead ends: 653 [2021-01-06 09:57:23,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2647 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1857, Invalid=6333, Unknown=0, NotChecked=0, Total=8190 [2021-01-06 09:57:23,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-01-06 09:57:23,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 516. [2021-01-06 09:57:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2021-01-06 09:57:23,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 731 transitions. [2021-01-06 09:57:23,538 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 731 transitions. Word has length 118 [2021-01-06 09:57:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:23,538 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 731 transitions. [2021-01-06 09:57:23,538 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:57:23,538 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 731 transitions. [2021-01-06 09:57:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-01-06 09:57:23,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:23,542 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:23,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:23,757 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:23,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:23,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1090307401, now seen corresponding path program 4 times [2021-01-06 09:57:23,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:23,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087085151] [2021-01-06 09:57:23,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 806 trivial. 0 not checked. [2021-01-06 09:57:24,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087085151] [2021-01-06 09:57:24,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345529083] [2021-01-06 09:57:24,009 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 09:57:24,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:57:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:24,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 09:57:24,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:24,293 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:24,295 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:24,301 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,302 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2021-01-06 09:57:24,397 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:24,397 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 54 [2021-01-06 09:57:24,404 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,422 INFO L625 ElimStorePlain]: treesize reduction 22, result has 52.2 percent of original size [2021-01-06 09:57:24,423 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,426 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 09:57:24,506 INFO L348 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2021-01-06 09:57:24,507 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-01-06 09:57:24,509 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,516 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:24,518 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:24,518 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-01-06 09:57:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 197 proven. 592 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2021-01-06 09:57:25,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:25,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 30] total 43 [2021-01-06 09:57:25,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175009641] [2021-01-06 09:57:25,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 09:57:25,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:25,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 09:57:25,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=1404, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 09:57:25,372 INFO L87 Difference]: Start difference. First operand 516 states and 731 transitions. Second operand 43 states. [2021-01-06 09:57:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:27,731 INFO L93 Difference]: Finished difference Result 1471 states and 2083 transitions. [2021-01-06 09:57:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 09:57:27,732 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 166 [2021-01-06 09:57:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:27,738 INFO L225 Difference]: With dead ends: 1471 [2021-01-06 09:57:27,738 INFO L226 Difference]: Without dead ends: 984 [2021-01-06 09:57:27,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=434, Invalid=1636, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 09:57:27,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-01-06 09:57:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 680. [2021-01-06 09:57:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2021-01-06 09:57:27,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 966 transitions. [2021-01-06 09:57:27,779 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 966 transitions. Word has length 166 [2021-01-06 09:57:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:27,780 INFO L481 AbstractCegarLoop]: Abstraction has 680 states and 966 transitions. [2021-01-06 09:57:27,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 09:57:27,780 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 966 transitions. [2021-01-06 09:57:27,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 09:57:27,783 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:27,783 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:27,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:57:27,997 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:27,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:27,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1067722828, now seen corresponding path program 5 times [2021-01-06 09:57:27,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:27,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067420597] [2021-01-06 09:57:27,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:28,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:28,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 938 trivial. 0 not checked. [2021-01-06 09:57:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067420597] [2021-01-06 09:57:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831353607] [2021-01-06 09:57:28,328 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 [2021-01-06 09:57:37,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-01-06 09:57:37,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:57:37,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2021-01-06 09:57:37,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:37,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:57:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517028328] [2021-01-06 09:57:37,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:57:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:37,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:57:37,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:37,621 INFO L87 Difference]: Start difference. First operand 680 states and 966 transitions. Second operand 18 states. [2021-01-06 09:57:37,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:57:37,996 INFO L93 Difference]: Finished difference Result 1566 states and 2226 transitions. [2021-01-06 09:57:37,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:57:37,997 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 178 [2021-01-06 09:57:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:57:38,003 INFO L225 Difference]: With dead ends: 1566 [2021-01-06 09:57:38,003 INFO L226 Difference]: Without dead ends: 917 [2021-01-06 09:57:38,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:57:38,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2021-01-06 09:57:38,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 721. [2021-01-06 09:57:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721 states. [2021-01-06 09:57:38,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 1024 transitions. [2021-01-06 09:57:38,037 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 1024 transitions. Word has length 178 [2021-01-06 09:57:38,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:57:38,037 INFO L481 AbstractCegarLoop]: Abstraction has 721 states and 1024 transitions. [2021-01-06 09:57:38,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:57:38,038 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 1024 transitions. [2021-01-06 09:57:38,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 09:57:38,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:57:38,041 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:57:38,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:38,243 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:57:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:57:38,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1455991971, now seen corresponding path program 6 times [2021-01-06 09:57:38,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:57:38,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814604966] [2021-01-06 09:57:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:57:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:57:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2021-01-06 09:57:38,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814604966] [2021-01-06 09:57:38,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029613917] [2021-01-06 09:57:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:57:39,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 09:57:39,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:57:39,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:57:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:57:39,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-01-06 09:57:39,305 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:39,309 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,309 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2021-01-06 09:57:39,356 INFO L348 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-01-06 09:57:39,356 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-01-06 09:57:39,358 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,363 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:39,364 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,364 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2021-01-06 09:57:39,470 INFO L348 Elim1Store]: treesize reduction 96, result has 20.7 percent of original size [2021-01-06 09:57:39,470 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 42 [2021-01-06 09:57:39,473 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:39,504 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-01-06 09:57:39,504 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2021-01-06 09:57:41,975 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:41,978 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 09:57:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:41,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:41,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-01-06 09:57:42,019 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-01-06 09:57:42,019 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 64 [2021-01-06 09:57:42,021 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 09:57:42,023 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 09:57:42,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 09:57:42,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:42,062 INFO L348 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-01-06 09:57:42,063 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 63 [2021-01-06 09:57:42,065 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-01-06 09:57:42,106 INFO L625 ElimStorePlain]: treesize reduction 1, result has 97.8 percent of original size [2021-01-06 09:57:42,110 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2021-01-06 09:57:42,111 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:111, output treesize:23 [2021-01-06 09:57:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 106 proven. 266 refuted. 0 times theorem prover too weak. 933 trivial. 0 not checked. [2021-01-06 09:57:42,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:57:42,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2021-01-06 09:57:42,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812525465] [2021-01-06 09:57:42,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 09:57:42,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:57:42,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 09:57:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=698, Unknown=1, NotChecked=0, Total=992 [2021-01-06 09:57:42,519 INFO L87 Difference]: Start difference. First operand 721 states and 1024 transitions. Second operand 32 states. [2021-01-06 09:57:57,862 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:58:17,060 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2021-01-06 09:58:35,396 WARN L197 SmtUtils]: Spent 4.03 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:58:53,675 WARN L197 SmtUtils]: Spent 3.97 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:59:04,047 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:59:30,546 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 09:59:51,503 WARN L197 SmtUtils]: Spent 2.48 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:06,060 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:35,527 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:00:54,319 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-01-06 10:01:30,444 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 37 DAG size of output: 36