/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-DerefFreeMemtrack-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:53:01,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:53:01,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:53:01,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:53:01,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:53:01,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:53:01,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:53:01,708 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:53:01,710 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:53:01,712 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:53:01,714 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:53:01,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:53:01,716 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:53:01,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:53:01,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:53:01,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:53:01,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:53:01,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:53:01,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:53:01,752 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:53:01,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:53:01,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:53:01,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:53:01,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:53:01,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:53:01,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:53:01,784 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:53:01,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:53:01,787 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:53:01,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:53:01,788 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:53:01,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:53:01,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:53:01,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:53:01,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:53:01,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:53:01,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:53:01,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:53:01,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:53:01,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:53:01,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:53:01,865 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:53:01,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:53:01,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:53:01,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:53:01,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:53:01,866 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:53:01,867 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:53:01,868 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:53:01,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:53:01,868 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:53:01,868 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:53:01,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:53:01,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:53:01,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:53:01,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:01,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:53:01,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:53:01,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:53:01,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:53:01,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:53:01,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:53:02,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:53:02,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:53:02,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:53:02,412 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:53:02,413 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:53:02,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2020-12-23 16:53:02,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4cd0bf106/05c7d7ee7dce48df944637c5d40b9739/FLAGdc8c7f2a7 [2020-12-23 16:53:03,324 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:53:03,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrlcpy-alloca-1.i [2020-12-23 16:53:03,347 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4cd0bf106/05c7d7ee7dce48df944637c5d40b9739/FLAGdc8c7f2a7 [2020-12-23 16:53:03,549 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4cd0bf106/05c7d7ee7dce48df944637c5d40b9739 [2020-12-23 16:53:03,552 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:53:03,554 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:53:03,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:03,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:53:03,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:53:03,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:03" (1/1) ... [2020-12-23 16:53:03,564 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2824ce19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:03, skipping insertion in model container [2020-12-23 16:53:03,564 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:03" (1/1) ... [2020-12-23 16:53:03,574 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:53:03,616 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[#t~post3,] left hand side expression in assignment: address: IdentifierExpression[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~n~1,],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:04,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:04,019 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[#t~post3,] left hand side expression in assignment: address: IdentifierExpression[~d~0,] left hand side expression in assignment: lhs: VariableLHS[~length~0,] left hand side expression in assignment: lhs: VariableLHS[~n~1,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~1,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~n~1,],IntegerLiteral[1]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],offset],BinaryExpression[ARITHMINUS,IdentifierExpression[~length~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:04,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:04,185 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:53:04,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04 WrapperNode [2020-12-23 16:53:04,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:04,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:04,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:53:04,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:53:04,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,223 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,251 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:04,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:53:04,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:53:04,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:53:04,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,275 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... [2020-12-23 16:53:04,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:53:04,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:53:04,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:53:04,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:53:04,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:53:04,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:53:05,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:53:05,030 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:53:05,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:05 BoogieIcfgContainer [2020-12-23 16:53:05,033 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:53:05,036 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:53:05,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:53:05,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:53:05,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:53:03" (1/3) ... [2020-12-23 16:53:05,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5be738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:05, skipping insertion in model container [2020-12-23 16:53:05,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:04" (2/3) ... [2020-12-23 16:53:05,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c5be738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:05, skipping insertion in model container [2020-12-23 16:53:05,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:05" (3/3) ... [2020-12-23 16:53:05,049 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrlcpy-alloca-1.i [2020-12-23 16:53:05,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:05,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 17 error locations. [2020-12-23 16:53:05,089 INFO L253 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2020-12-23 16:53:05,127 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:05,128 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:05,128 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:05,128 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:05,128 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:05,128 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:05,129 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:05,129 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:05,147 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2020-12-23 16:53:05,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:05,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:05,157 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:05,157 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:05,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:05,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-23 16:53:05,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:05,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334471884] [2020-12-23 16:53:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:05,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334471884] [2020-12-23 16:53:05,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:05,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:05,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639082711] [2020-12-23 16:53:05,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:05,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:05,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:05,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:05,432 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2020-12-23 16:53:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:05,494 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-12-23 16:53:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:05,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-23 16:53:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:05,508 INFO L225 Difference]: With dead ends: 94 [2020-12-23 16:53:05,508 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:53:05,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:53:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2020-12-23 16:53:05,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:53:05,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-12-23 16:53:05,554 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 7 [2020-12-23 16:53:05,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:05,555 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-12-23 16:53:05,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:05,555 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-12-23 16:53:05,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:05,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:05,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:05,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:05,557 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:05,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:05,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-12-23 16:53:05,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:05,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361012811] [2020-12-23 16:53:05,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:05,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361012811] [2020-12-23 16:53:05,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:05,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:05,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298633476] [2020-12-23 16:53:05,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:05,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:05,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:05,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:05,610 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 3 states. [2020-12-23 16:53:05,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:05,657 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-12-23 16:53:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:05,657 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:05,659 INFO L225 Difference]: With dead ends: 50 [2020-12-23 16:53:05,659 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 16:53:05,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:05,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 16:53:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-23 16:53:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:53:05,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-23 16:53:05,667 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 7 [2020-12-23 16:53:05,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:05,668 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-23 16:53:05,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:05,668 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-23 16:53:05,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:05,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:05,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:05,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:05,670 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-12-23 16:53:05,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:05,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960208392] [2020-12-23 16:53:05,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:05,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960208392] [2020-12-23 16:53:05,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:05,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:05,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424221387] [2020-12-23 16:53:05,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:05,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:05,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:05,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:05,832 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 5 states. [2020-12-23 16:53:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:05,955 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-12-23 16:53:05,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:05,956 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:53:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:05,957 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:53:05,957 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:53:05,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:53:05,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 59. [2020-12-23 16:53:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:53:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 75 transitions. [2020-12-23 16:53:05,965 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 75 transitions. Word has length 7 [2020-12-23 16:53:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:05,966 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 75 transitions. [2020-12-23 16:53:05,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 75 transitions. [2020-12-23 16:53:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:05,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:05,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:53:05,968 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -533876961, now seen corresponding path program 1 times [2020-12-23 16:53:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65200066] [2020-12-23 16:53:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65200066] [2020-12-23 16:53:06,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:06,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:06,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104966833] [2020-12-23 16:53:06,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:06,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:06,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:06,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:06,019 INFO L87 Difference]: Start difference. First operand 59 states and 75 transitions. Second operand 3 states. [2020-12-23 16:53:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:06,055 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-12-23 16:53:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:06,056 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-12-23 16:53:06,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:06,057 INFO L225 Difference]: With dead ends: 57 [2020-12-23 16:53:06,057 INFO L226 Difference]: Without dead ends: 57 [2020-12-23 16:53:06,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:06,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-23 16:53:06,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-23 16:53:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:53:06,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-12-23 16:53:06,064 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 9 [2020-12-23 16:53:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:06,064 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-12-23 16:53:06,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-12-23 16:53:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:06,065 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:06,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:06,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:53:06,066 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:06,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:06,067 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-12-23 16:53:06,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:06,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362225188] [2020-12-23 16:53:06,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362225188] [2020-12-23 16:53:06,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:06,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:06,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534737707] [2020-12-23 16:53:06,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:06,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:06,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:06,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:06,195 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 4 states. [2020-12-23 16:53:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:06,251 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2020-12-23 16:53:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:06,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:53:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:06,253 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:53:06,254 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:53:06,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:53:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 16:53:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:53:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-12-23 16:53:06,265 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 9 [2020-12-23 16:53:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:06,265 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-12-23 16:53:06,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:06,265 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-12-23 16:53:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:06,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:06,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:06,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:53:06,267 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:06,269 INFO L82 PathProgramCache]: Analyzing trace with hash -533876907, now seen corresponding path program 1 times [2020-12-23 16:53:06,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:06,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607640251] [2020-12-23 16:53:06,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607640251] [2020-12-23 16:53:06,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:06,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:06,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713489432] [2020-12-23 16:53:06,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:06,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:06,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:06,351 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 4 states. [2020-12-23 16:53:06,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:06,387 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-12-23 16:53:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:06,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-12-23 16:53:06,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:06,391 INFO L225 Difference]: With dead ends: 100 [2020-12-23 16:53:06,392 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 16:53:06,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:06,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 16:53:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-12-23 16:53:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 16:53:06,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-12-23 16:53:06,402 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 9 [2020-12-23 16:53:06,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:06,403 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-12-23 16:53:06,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:06,405 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-12-23 16:53:06,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 16:53:06,406 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:06,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:06,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:53:06,407 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-12-23 16:53:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501922234] [2020-12-23 16:53:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:06,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501922234] [2020-12-23 16:53:06,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:06,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:06,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749468762] [2020-12-23 16:53:06,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:06,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:06,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:06,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:06,480 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 5 states. [2020-12-23 16:53:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:06,573 INFO L93 Difference]: Finished difference Result 107 states and 130 transitions. [2020-12-23 16:53:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:06,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-23 16:53:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:06,575 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:53:06,575 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:53:06,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:53:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2020-12-23 16:53:06,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:53:06,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-12-23 16:53:06,582 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 9 [2020-12-23 16:53:06,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:06,582 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-12-23 16:53:06,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-12-23 16:53:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:06,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:06,584 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:06,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:53:06,584 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-23 16:53:06,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:06,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641154190] [2020-12-23 16:53:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641154190] [2020-12-23 16:53:06,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964377506] [2020-12-23 16:53:06,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:06,798 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,799 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:06,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,822 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:53:06,826 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,826 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-23 16:53:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:06,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:06,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376548176] [2020-12-23 16:53:06,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:06,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:06,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:06,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:06,876 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 6 states. [2020-12-23 16:53:07,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:07,031 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-12-23 16:53:07,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:07,031 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:07,032 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:53:07,033 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:53:07,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:07,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:53:07,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-12-23 16:53:07,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:53:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2020-12-23 16:53:07,044 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 11 [2020-12-23 16:53:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:07,045 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2020-12-23 16:53:07,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2020-12-23 16:53:07,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:07,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:07,046 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:07,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-12-23 16:53:07,253 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:07,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-12-23 16:53:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:07,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236285783] [2020-12-23 16:53:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:07,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236285783] [2020-12-23 16:53:07,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56403041] [2020-12-23 16:53:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:07,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:53:07,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:07,424 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_21|], 1=[|v_#valid_28|]} [2020-12-23 16:53:07,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:07,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:07,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:07,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:07,449 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:07,452 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:07,459 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:07,462 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:07,463 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-23 16:53:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:07,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:07,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:53:07,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163007716] [2020-12-23 16:53:07,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:07,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:07,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:07,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:07,510 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 7 states. [2020-12-23 16:53:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:07,619 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-12-23 16:53:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:07,620 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-12-23 16:53:07,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:07,621 INFO L225 Difference]: With dead ends: 103 [2020-12-23 16:53:07,621 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 16:53:07,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:07,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 16:53:07,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-12-23 16:53:07,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 16:53:07,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2020-12-23 16:53:07,626 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 13 [2020-12-23 16:53:07,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:07,627 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2020-12-23 16:53:07,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:07,627 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2020-12-23 16:53:07,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:53:07,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:07,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:07,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:07,843 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash -115553675, now seen corresponding path program 1 times [2020-12-23 16:53:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:07,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414402243] [2020-12-23 16:53:07,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:07,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414402243] [2020-12-23 16:53:07,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:07,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:07,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036868624] [2020-12-23 16:53:07,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:07,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:07,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:07,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:07,933 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand 4 states. [2020-12-23 16:53:07,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:07,977 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2020-12-23 16:53:07,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:07,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 16:53:07,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:07,978 INFO L225 Difference]: With dead ends: 64 [2020-12-23 16:53:07,978 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 16:53:07,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 16:53:07,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 53. [2020-12-23 16:53:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:53:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-23 16:53:07,985 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 14 [2020-12-23 16:53:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:07,986 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-23 16:53:07,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-23 16:53:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:53:07,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:07,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:07,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:53:07,991 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1062912840, now seen corresponding path program 1 times [2020-12-23 16:53:07,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:07,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997755766] [2020-12-23 16:53:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997755766] [2020-12-23 16:53:08,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912421551] [2020-12-23 16:53:08,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:08,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:08,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:08,081 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-12-23 16:53:08,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,156 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-23 16:53:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:08,159 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-23 16:53:08,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,160 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:53:08,160 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:53:08,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:53:08,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2020-12-23 16:53:08,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:53:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2020-12-23 16:53:08,164 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 15 [2020-12-23 16:53:08,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,164 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2020-12-23 16:53:08,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2020-12-23 16:53:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:53:08,165 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:53:08,165 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1062113512, now seen corresponding path program 1 times [2020-12-23 16:53:08,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905323482] [2020-12-23 16:53:08,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905323482] [2020-12-23 16:53:08,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:08,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817563339] [2020-12-23 16:53:08,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:08,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:08,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:08,221 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand 5 states. [2020-12-23 16:53:08,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,331 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-12-23 16:53:08,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:08,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 16:53:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,333 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:53:08,333 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:53:08,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:08,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:53:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-23 16:53:08,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:53:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-12-23 16:53:08,336 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 15 [2020-12-23 16:53:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,337 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-12-23 16:53:08,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:08,337 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2020-12-23 16:53:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:53:08,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,340 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:53:08,340 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1062113513, now seen corresponding path program 1 times [2020-12-23 16:53:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7350983] [2020-12-23 16:53:08,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7350983] [2020-12-23 16:53:08,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:08,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610208108] [2020-12-23 16:53:08,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:08,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:08,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:08,500 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand 7 states. [2020-12-23 16:53:08,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,602 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2020-12-23 16:53:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:08,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-12-23 16:53:08,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,603 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:53:08,603 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:53:08,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:53:08,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 59. [2020-12-23 16:53:08,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 16:53:08,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-23 16:53:08,607 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 15 [2020-12-23 16:53:08,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,608 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-23 16:53:08,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:08,608 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-23 16:53:08,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 16:53:08,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:53:08,609 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1321078278, now seen corresponding path program 1 times [2020-12-23 16:53:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466356280] [2020-12-23 16:53:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466356280] [2020-12-23 16:53:08,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:08,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772308576] [2020-12-23 16:53:08,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:08,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:08,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:08,675 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 5 states. [2020-12-23 16:53:08,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,720 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-12-23 16:53:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:08,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-12-23 16:53:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,722 INFO L225 Difference]: With dead ends: 59 [2020-12-23 16:53:08,722 INFO L226 Difference]: Without dead ends: 59 [2020-12-23 16:53:08,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-23 16:53:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-12-23 16:53:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:53:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-12-23 16:53:08,727 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 15 [2020-12-23 16:53:08,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,727 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-12-23 16:53:08,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-12-23 16:53:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:53:08,729 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 16:53:08,730 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1434219452, now seen corresponding path program 1 times [2020-12-23 16:53:08,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488530433] [2020-12-23 16:53:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488530433] [2020-12-23 16:53:08,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887539388] [2020-12-23 16:53:08,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:08,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:08,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:08,790 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 5 states. [2020-12-23 16:53:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,854 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2020-12-23 16:53:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:08,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 16:53:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,855 INFO L225 Difference]: With dead ends: 53 [2020-12-23 16:53:08,856 INFO L226 Difference]: Without dead ends: 53 [2020-12-23 16:53:08,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:08,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-23 16:53:08,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-23 16:53:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:53:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-23 16:53:08,863 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2020-12-23 16:53:08,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,863 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-23 16:53:08,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:08,863 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-23 16:53:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:53:08,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,866 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:53:08,868 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:08,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1434219451, now seen corresponding path program 1 times [2020-12-23 16:53:08,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835513516] [2020-12-23 16:53:08,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835513516] [2020-12-23 16:53:08,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:08,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:08,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419757627] [2020-12-23 16:53:08,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:08,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:08,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:08,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:08,948 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 7 states. [2020-12-23 16:53:09,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,068 INFO L93 Difference]: Finished difference Result 67 states and 81 transitions. [2020-12-23 16:53:09,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:09,069 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 16:53:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,070 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:53:09,070 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:53:09,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:09,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:53:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2020-12-23 16:53:09,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:53:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-12-23 16:53:09,073 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 16 [2020-12-23 16:53:09,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,073 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-12-23 16:53:09,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:09,073 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-12-23 16:53:09,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:09,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:53:09,074 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,075 INFO L82 PathProgramCache]: Analyzing trace with hash 399147362, now seen corresponding path program 1 times [2020-12-23 16:53:09,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098218387] [2020-12-23 16:53:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098218387] [2020-12-23 16:53:09,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:09,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:09,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481970203] [2020-12-23 16:53:09,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:09,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:09,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:09,155 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-12-23 16:53:09,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,225 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-12-23 16:53:09,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:09,226 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 16:53:09,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,228 INFO L225 Difference]: With dead ends: 103 [2020-12-23 16:53:09,228 INFO L226 Difference]: Without dead ends: 103 [2020-12-23 16:53:09,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:09,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-23 16:53:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 68. [2020-12-23 16:53:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:53:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2020-12-23 16:53:09,233 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 18 [2020-12-23 16:53:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,233 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2020-12-23 16:53:09,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2020-12-23 16:53:09,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:09,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 16:53:09,235 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,235 INFO L82 PathProgramCache]: Analyzing trace with hash 398353032, now seen corresponding path program 1 times [2020-12-23 16:53:09,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574442883] [2020-12-23 16:53:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574442883] [2020-12-23 16:53:09,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:09,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:09,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978097464] [2020-12-23 16:53:09,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:09,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:09,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:09,287 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 5 states. [2020-12-23 16:53:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,345 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-12-23 16:53:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:09,346 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 16:53:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,347 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:53:09,347 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:53:09,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:53:09,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-23 16:53:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 16:53:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-12-23 16:53:09,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 18 [2020-12-23 16:53:09,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,350 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-12-23 16:53:09,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-12-23 16:53:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:09,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 16:53:09,351 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,352 INFO L82 PathProgramCache]: Analyzing trace with hash 398353033, now seen corresponding path program 1 times [2020-12-23 16:53:09,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789320833] [2020-12-23 16:53:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789320833] [2020-12-23 16:53:09,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:09,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:09,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272179203] [2020-12-23 16:53:09,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:09,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:09,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:09,440 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 5 states. [2020-12-23 16:53:09,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,513 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2020-12-23 16:53:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:09,513 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 16:53:09,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,514 INFO L225 Difference]: With dead ends: 88 [2020-12-23 16:53:09,514 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 16:53:09,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 16:53:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2020-12-23 16:53:09,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:53:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2020-12-23 16:53:09,518 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 18 [2020-12-23 16:53:09,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,518 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2020-12-23 16:53:09,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:09,518 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2020-12-23 16:53:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 16:53:09,522 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,523 INFO L82 PathProgramCache]: Analyzing trace with hash -880716316, now seen corresponding path program 1 times [2020-12-23 16:53:09,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23842963] [2020-12-23 16:53:09,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23842963] [2020-12-23 16:53:09,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:09,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:53:09,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504856749] [2020-12-23 16:53:09,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:09,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:09,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:09,652 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand 7 states. [2020-12-23 16:53:09,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,756 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-12-23 16:53:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:09,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-23 16:53:09,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,759 INFO L225 Difference]: With dead ends: 125 [2020-12-23 16:53:09,759 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 16:53:09,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 16:53:09,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2020-12-23 16:53:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:53:09,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2020-12-23 16:53:09,765 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 18 [2020-12-23 16:53:09,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,765 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2020-12-23 16:53:09,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:09,765 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2020-12-23 16:53:09,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 16:53:09,766 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 16:53:09,766 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash -881510645, now seen corresponding path program 1 times [2020-12-23 16:53:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249442408] [2020-12-23 16:53:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249442408] [2020-12-23 16:53:09,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:09,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:09,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225241538] [2020-12-23 16:53:09,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:09,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:09,905 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand 6 states. [2020-12-23 16:53:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:09,965 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-12-23 16:53:09,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:09,966 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-12-23 16:53:09,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:09,966 INFO L225 Difference]: With dead ends: 87 [2020-12-23 16:53:09,967 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 16:53:09,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:09,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 16:53:09,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-12-23 16:53:09,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:53:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-12-23 16:53:09,969 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 18 [2020-12-23 16:53:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:09,970 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-12-23 16:53:09,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-12-23 16:53:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:53:09,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:09,970 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:09,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 16:53:09,971 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:09,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:09,971 INFO L82 PathProgramCache]: Analyzing trace with hash -536115456, now seen corresponding path program 1 times [2020-12-23 16:53:09,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:09,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578796272] [2020-12-23 16:53:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:10,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578796272] [2020-12-23 16:53:10,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:10,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093195865] [2020-12-23 16:53:10,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:10,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:10,040 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 7 states. [2020-12-23 16:53:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,143 INFO L93 Difference]: Finished difference Result 75 states and 89 transitions. [2020-12-23 16:53:10,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:10,144 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 16:53:10,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,145 INFO L225 Difference]: With dead ends: 75 [2020-12-23 16:53:10,145 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:53:10,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:10,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:53:10,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2020-12-23 16:53:10,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 16:53:10,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2020-12-23 16:53:10,148 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 19 [2020-12-23 16:53:10,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,148 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2020-12-23 16:53:10,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:10,148 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2020-12-23 16:53:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:10,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 16:53:10,149 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1773371798, now seen corresponding path program 1 times [2020-12-23 16:53:10,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569365825] [2020-12-23 16:53:10,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569365825] [2020-12-23 16:53:10,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:10,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455536983] [2020-12-23 16:53:10,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:10,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:10,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:10,218 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand 5 states. [2020-12-23 16:53:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,286 INFO L93 Difference]: Finished difference Result 89 states and 103 transitions. [2020-12-23 16:53:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:10,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-12-23 16:53:10,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,287 INFO L225 Difference]: With dead ends: 89 [2020-12-23 16:53:10,288 INFO L226 Difference]: Without dead ends: 89 [2020-12-23 16:53:10,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:10,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-23 16:53:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-12-23 16:53:10,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:53:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 90 transitions. [2020-12-23 16:53:10,291 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 90 transitions. Word has length 20 [2020-12-23 16:53:10,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,291 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 90 transitions. [2020-12-23 16:53:10,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:10,292 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 90 transitions. [2020-12-23 16:53:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:10,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,292 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-23 16:53:10,293 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 185023896, now seen corresponding path program 1 times [2020-12-23 16:53:10,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269551791] [2020-12-23 16:53:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269551791] [2020-12-23 16:53:10,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:53:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068863377] [2020-12-23 16:53:10,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:10,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:10,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:10,399 INFO L87 Difference]: Start difference. First operand 76 states and 90 transitions. Second operand 7 states. [2020-12-23 16:53:10,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,502 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2020-12-23 16:53:10,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:10,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-23 16:53:10,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,503 INFO L225 Difference]: With dead ends: 87 [2020-12-23 16:53:10,503 INFO L226 Difference]: Without dead ends: 87 [2020-12-23 16:53:10,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:10,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-23 16:53:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2020-12-23 16:53:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 16:53:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2020-12-23 16:53:10,506 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 20 [2020-12-23 16:53:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,506 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2020-12-23 16:53:10,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2020-12-23 16:53:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:53:10,507 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,507 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 16:53:10,508 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1567874516, now seen corresponding path program 1 times [2020-12-23 16:53:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988107432] [2020-12-23 16:53:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:10,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988107432] [2020-12-23 16:53:10,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:53:10,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741674225] [2020-12-23 16:53:10,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:53:10,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:53:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:10,626 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand 9 states. [2020-12-23 16:53:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,784 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2020-12-23 16:53:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:10,785 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-23 16:53:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,786 INFO L225 Difference]: With dead ends: 122 [2020-12-23 16:53:10,786 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 16:53:10,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:10,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 16:53:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-12-23 16:53:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:53:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-12-23 16:53:10,789 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 22 [2020-12-23 16:53:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,790 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-12-23 16:53:10,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:53:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-12-23 16:53:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:53:10,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,791 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] [2020-12-23 16:53:10,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 16:53:10,791 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,792 INFO L82 PathProgramCache]: Analyzing trace with hash -192272511, now seen corresponding path program 1 times [2020-12-23 16:53:10,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104750082] [2020-12-23 16:53:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:10,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:10,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104750082] [2020-12-23 16:53:10,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:10,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:10,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461234628] [2020-12-23 16:53:10,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:10,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:10,922 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 4 states. [2020-12-23 16:53:10,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,941 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2020-12-23 16:53:10,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:10,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-12-23 16:53:10,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,943 INFO L225 Difference]: With dead ends: 98 [2020-12-23 16:53:10,943 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 16:53:10,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:10,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 16:53:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-12-23 16:53:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:53:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-12-23 16:53:10,946 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 22 [2020-12-23 16:53:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,947 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-12-23 16:53:10,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-12-23 16:53:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 16:53:10,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,948 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 16:53:10,948 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash 750226066, now seen corresponding path program 1 times [2020-12-23 16:53:10,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524766954] [2020-12-23 16:53:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524766954] [2020-12-23 16:53:11,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:11,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 16:53:11,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209026288] [2020-12-23 16:53:11,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:53:11,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:53:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:11,140 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 10 states. [2020-12-23 16:53:11,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:11,313 INFO L93 Difference]: Finished difference Result 152 states and 173 transitions. [2020-12-23 16:53:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:11,314 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-12-23 16:53:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:11,314 INFO L225 Difference]: With dead ends: 152 [2020-12-23 16:53:11,315 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 16:53:11,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:53:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 16:53:11,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 94. [2020-12-23 16:53:11,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 16:53:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 110 transitions. [2020-12-23 16:53:11,318 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 110 transitions. Word has length 22 [2020-12-23 16:53:11,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:11,318 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 110 transitions. [2020-12-23 16:53:11,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:53:11,318 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 110 transitions. [2020-12-23 16:53:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:53:11,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:11,319 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, 1] [2020-12-23 16:53:11,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 16:53:11,319 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:11,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:11,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1359425129, now seen corresponding path program 1 times [2020-12-23 16:53:11,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:11,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325786661] [2020-12-23 16:53:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325786661] [2020-12-23 16:53:11,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:11,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:11,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841360930] [2020-12-23 16:53:11,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:11,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:11,368 INFO L87 Difference]: Start difference. First operand 94 states and 110 transitions. Second operand 4 states. [2020-12-23 16:53:11,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:11,393 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-12-23 16:53:11,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:11,394 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-12-23 16:53:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:11,395 INFO L225 Difference]: With dead ends: 93 [2020-12-23 16:53:11,395 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:53:11,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:11,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:53:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 16:53:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 16:53:11,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2020-12-23 16:53:11,397 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 23 [2020-12-23 16:53:11,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:11,398 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2020-12-23 16:53:11,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2020-12-23 16:53:11,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:53:11,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:11,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:11,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-23 16:53:11,399 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash 354556917, now seen corresponding path program 1 times [2020-12-23 16:53:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:11,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124637403] [2020-12-23 16:53:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124637403] [2020-12-23 16:53:11,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858568] [2020-12-23 16:53:11,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:11,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 16:53:11,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:11,631 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 11 treesize of output 7 [2020-12-23 16:53:11,631 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,639 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:53:11,871 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:11,874 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,874 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 15 treesize of output 10 [2020-12-23 16:53:11,875 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,890 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,891 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-23 16:53:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:11,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:11,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2020-12-23 16:53:11,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531253604] [2020-12-23 16:53:11,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:11,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:11,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:11,918 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand 8 states. [2020-12-23 16:53:12,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:12,155 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2020-12-23 16:53:12,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:53:12,156 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-12-23 16:53:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:12,157 INFO L225 Difference]: With dead ends: 96 [2020-12-23 16:53:12,157 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 16:53:12,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:12,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 16:53:12,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-12-23 16:53:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 16:53:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-12-23 16:53:12,160 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 24 [2020-12-23 16:53:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:12,160 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-12-23 16:53:12,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-12-23 16:53:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:53:12,161 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:12,161 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, 1, 1] [2020-12-23 16:53:12,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 16:53:12,375 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:12,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:12,376 INFO L82 PathProgramCache]: Analyzing trace with hash 354522096, now seen corresponding path program 1 times [2020-12-23 16:53:12,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:12,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899931724] [2020-12-23 16:53:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:12,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899931724] [2020-12-23 16:53:12,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837730552] [2020-12-23 16:53:12,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:12,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:12,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 16:53:12,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:12,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:12,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2020-12-23 16:53:12,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156848900] [2020-12-23 16:53:12,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 16:53:12,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:12,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 16:53:12,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:12,685 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 13 states. [2020-12-23 16:53:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:13,196 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2020-12-23 16:53:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:53:13,197 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 16:53:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:13,198 INFO L225 Difference]: With dead ends: 122 [2020-12-23 16:53:13,198 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 16:53:13,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:53:13,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 16:53:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 76. [2020-12-23 16:53:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:53:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-12-23 16:53:13,201 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 24 [2020-12-23 16:53:13,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:13,202 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-12-23 16:53:13,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 16:53:13,202 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-12-23 16:53:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:53:13,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:13,203 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:13,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:13,417 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash 573411635, now seen corresponding path program 1 times [2020-12-23 16:53:13,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:13,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456926095] [2020-12-23 16:53:13,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:13,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456926095] [2020-12-23 16:53:13,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956772144] [2020-12-23 16:53:13,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:53:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:13,681 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 14 treesize of output 10 [2020-12-23 16:53:13,681 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,689 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,691 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:13,691 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:13,860 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:13,862 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,862 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 18 treesize of output 10 [2020-12-23 16:53:13,863 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,874 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:13,879 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:13,879 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:3 [2020-12-23 16:53:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:13,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:13,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2020-12-23 16:53:13,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84942079] [2020-12-23 16:53:13,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:53:13,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:53:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:13,909 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 9 states. [2020-12-23 16:53:14,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:14,226 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-12-23 16:53:14,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:14,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-12-23 16:53:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:14,227 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:53:14,228 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 16:53:14,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:14,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 16:53:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 16:53:14,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:53:14,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-12-23 16:53:14,230 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 24 [2020-12-23 16:53:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:14,231 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-12-23 16:53:14,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:53:14,231 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-12-23 16:53:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:53:14,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:14,231 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:14,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 16:53:14,441 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:14,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash 522576623, now seen corresponding path program 1 times [2020-12-23 16:53:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:14,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217342730] [2020-12-23 16:53:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:14,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:14,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217342730] [2020-12-23 16:53:14,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429928270] [2020-12-23 16:53:14,577 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:14,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:53:14,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:14,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:14,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 16:53:14,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996397704] [2020-12-23 16:53:14,765 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:14,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:14,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:14,766 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 15 states. [2020-12-23 16:53:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:15,023 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-23 16:53:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:15,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 26 [2020-12-23 16:53:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:15,025 INFO L225 Difference]: With dead ends: 74 [2020-12-23 16:53:15,025 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:53:15,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:15,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:53:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-12-23 16:53:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 16:53:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2020-12-23 16:53:15,027 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 26 [2020-12-23 16:53:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:15,028 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2020-12-23 16:53:15,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:15,028 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2020-12-23 16:53:15,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:53:15,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:15,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:15,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:15,231 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:15,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash 563475792, now seen corresponding path program 1 times [2020-12-23 16:53:15,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:15,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916436999] [2020-12-23 16:53:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:15,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916436999] [2020-12-23 16:53:15,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440840370] [2020-12-23 16:53:15,355 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:15,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:53:15,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:15,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:15,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 16:53:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122738056] [2020-12-23 16:53:15,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:15,593 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand 15 states. [2020-12-23 16:53:15,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:15,909 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-12-23 16:53:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:15,910 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 16:53:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:15,910 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:53:15,911 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:53:15,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:15,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:53:15,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-12-23 16:53:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-23 16:53:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-12-23 16:53:15,913 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 28 [2020-12-23 16:53:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:15,914 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-12-23 16:53:15,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-12-23 16:53:15,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:53:15,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:15,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:16,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:16,128 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1176221819, now seen corresponding path program 2 times [2020-12-23 16:53:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:16,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942817379] [2020-12-23 16:53:16,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:16,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942817379] [2020-12-23 16:53:16,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525946651] [2020-12-23 16:53:16,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:16,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:16,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:16,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:53:16,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:16,635 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,635 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:16,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,670 INFO L625 ElimStorePlain]: treesize reduction 10, result has 75.0 percent of original size [2020-12-23 16:53:16,675 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,675 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:15 [2020-12-23 16:53:16,762 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 16 treesize of output 12 [2020-12-23 16:53:16,763 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,771 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,772 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,772 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 16:53:16,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:16,849 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:16,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,860 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:16,860 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-23 16:53:17,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:17,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:17,151 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:17,152 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 36 [2020-12-23 16:53:17,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:17,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:17,168 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:17,170 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:17,171 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:19 [2020-12-23 16:53:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:17,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:17,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 16:53:17,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188151241] [2020-12-23 16:53:17,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:53:17,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:17,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:53:17,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:17,325 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 26 states. [2020-12-23 16:53:18,892 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 16:53:19,188 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-23 16:53:19,767 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 16:53:20,178 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-23 16:53:20,467 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-23 16:53:21,288 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-12-23 16:53:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:21,618 INFO L93 Difference]: Finished difference Result 124 states and 132 transitions. [2020-12-23 16:53:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 16:53:21,619 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-12-23 16:53:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:21,620 INFO L225 Difference]: With dead ends: 124 [2020-12-23 16:53:21,620 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:53:21,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=524, Invalid=3016, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:53:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:53:21,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-12-23 16:53:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:53:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-12-23 16:53:21,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 29 [2020-12-23 16:53:21,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:21,625 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-12-23 16:53:21,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:53:21,625 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-12-23 16:53:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-23 16:53:21,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:21,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:21,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:53:21,840 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash 287880382, now seen corresponding path program 1 times [2020-12-23 16:53:21,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:21,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199397530] [2020-12-23 16:53:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:21,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199397530] [2020-12-23 16:53:21,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314164349] [2020-12-23 16:53:21,990 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 16:53:22,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:22,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:22,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:22,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 15 [2020-12-23 16:53:22,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371724148] [2020-12-23 16:53:22,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:53:22,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:53:22,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:22,214 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 16 states. [2020-12-23 16:53:22,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:22,572 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2020-12-23 16:53:22,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:22,573 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2020-12-23 16:53:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:22,574 INFO L225 Difference]: With dead ends: 105 [2020-12-23 16:53:22,574 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 16:53:22,575 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:53:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 16:53:22,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 76. [2020-12-23 16:53:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 16:53:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-12-23 16:53:22,578 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 29 [2020-12-23 16:53:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:22,578 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-12-23 16:53:22,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:53:22,578 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-12-23 16:53:22,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:53:22,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:22,579 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:22,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:22,793 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:22,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:22,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1094755279, now seen corresponding path program 1 times [2020-12-23 16:53:22,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:22,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836661588] [2020-12-23 16:53:22,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:22,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836661588] [2020-12-23 16:53:22,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29375760] [2020-12-23 16:53:22,910 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:53:22,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:23,006 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:23,007 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:23,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:23,029 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:23,033 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:23,033 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:23,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:23,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-12-23 16:53:23,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433085144] [2020-12-23 16:53:23,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:53:23,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:23,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:53:23,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:23,259 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 19 states. [2020-12-23 16:53:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:23,787 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-12-23 16:53:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:23,787 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-23 16:53:23,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:23,789 INFO L225 Difference]: With dead ends: 142 [2020-12-23 16:53:23,789 INFO L226 Difference]: Without dead ends: 125 [2020-12-23 16:53:23,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=505, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:23,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-23 16:53:23,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-12-23 16:53:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 16:53:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2020-12-23 16:53:23,793 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 32 [2020-12-23 16:53:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:23,794 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2020-12-23 16:53:23,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:53:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2020-12-23 16:53:23,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:53:23,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:23,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:24,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:24,003 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:24,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:24,004 INFO L82 PathProgramCache]: Analyzing trace with hash 808306063, now seen corresponding path program 2 times [2020-12-23 16:53:24,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:24,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482810768] [2020-12-23 16:53:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:24,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:24,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482810768] [2020-12-23 16:53:24,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860650447] [2020-12-23 16:53:24,141 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:24,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:24,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 16:53:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:24,237 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:24,239 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,246 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:53:24,356 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:24,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,367 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:24,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:53:24,634 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:24,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,651 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,657 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:24,658 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:43, output treesize:28 [2020-12-23 16:53:24,810 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:24,812 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,812 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 18 treesize of output 10 [2020-12-23 16:53:24,813 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:24,828 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:24,829 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:3 [2020-12-23 16:53:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:24,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:24,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2020-12-23 16:53:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445548118] [2020-12-23 16:53:24,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:53:24,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:24,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:53:24,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:24,868 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand 21 states. [2020-12-23 16:53:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:27,023 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-12-23 16:53:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 16:53:27,025 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2020-12-23 16:53:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:27,027 INFO L225 Difference]: With dead ends: 185 [2020-12-23 16:53:27,027 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 16:53:27,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=325, Invalid=1931, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:53:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 16:53:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 120. [2020-12-23 16:53:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 16:53:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 131 transitions. [2020-12-23 16:53:27,032 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 131 transitions. Word has length 33 [2020-12-23 16:53:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:27,032 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 131 transitions. [2020-12-23 16:53:27,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:53:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 131 transitions. [2020-12-23 16:53:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-23 16:53:27,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:27,033 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:27,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:53:27,247 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:27,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:27,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1852639117, now seen corresponding path program 1 times [2020-12-23 16:53:27,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:27,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504592189] [2020-12-23 16:53:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:27,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504592189] [2020-12-23 16:53:27,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704549887] [2020-12-23 16:53:27,552 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:53:27,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:27,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:27,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,659 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,660 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,660 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:27,805 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:27,806 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,814 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,815 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:27,816 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:27,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:27,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,972 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:27,972 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:53:28,050 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:28,052 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,061 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,063 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:28,063 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:28 [2020-12-23 16:53:28,184 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:28,185 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 1 case distinctions, treesize of input 25 treesize of output 21 [2020-12-23 16:53:28,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:28,205 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:53:28,208 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:28,208 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:35, output treesize:3 [2020-12-23 16:53:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:28,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:28,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2020-12-23 16:53:28,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727907350] [2020-12-23 16:53:28,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:28,222 INFO L87 Difference]: Start difference. First operand 120 states and 131 transitions. Second operand 24 states. [2020-12-23 16:53:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,298 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-12-23 16:53:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:29,299 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 35 [2020-12-23 16:53:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,300 INFO L225 Difference]: With dead ends: 124 [2020-12-23 16:53:29,300 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 16:53:29,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1073, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:53:29,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 16:53:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2020-12-23 16:53:29,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:53:29,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2020-12-23 16:53:29,303 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 35 [2020-12-23 16:53:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,303 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2020-12-23 16:53:29,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2020-12-23 16:53:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 16:53:29,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,304 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:29,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:53:29,512 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:29,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1637145420, now seen corresponding path program 3 times [2020-12-23 16:53:29,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706100376] [2020-12-23 16:53:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,760 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:29,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706100376] [2020-12-23 16:53:29,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006039097] [2020-12-23 16:53:29,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:29,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:29,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:29,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:53:29,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:29,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:29,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,872 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,872 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:53:30,039 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:30,041 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:30,050 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:30,182 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:53:30,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,193 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:30,196 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:28 [2020-12-23 16:53:30,498 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,499 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 1 case distinctions, treesize of input 25 treesize of output 21 [2020-12-23 16:53:30,501 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:30,519 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:53:30,521 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:35, output treesize:3 [2020-12-23 16:53:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:30,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:30,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 26 [2020-12-23 16:53:30,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115379411] [2020-12-23 16:53:30,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:53:30,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:53:30,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:30,535 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand 26 states. [2020-12-23 16:53:31,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:31,462 INFO L93 Difference]: Finished difference Result 183 states and 199 transitions. [2020-12-23 16:53:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:53:31,463 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 36 [2020-12-23 16:53:31,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:31,464 INFO L225 Difference]: With dead ends: 183 [2020-12-23 16:53:31,465 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 16:53:31,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:53:31,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 16:53:31,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 119. [2020-12-23 16:53:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 16:53:31,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2020-12-23 16:53:31,469 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 36 [2020-12-23 16:53:31,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:31,469 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2020-12-23 16:53:31,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:53:31,470 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2020-12-23 16:53:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 16:53:31,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:31,470 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:31,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:53:31,675 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:31,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:31,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2118262960, now seen corresponding path program 2 times [2020-12-23 16:53:31,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:31,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645631606] [2020-12-23 16:53:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:31,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645631606] [2020-12-23 16:53:31,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6605062] [2020-12-23 16:53:31,838 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:31,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:31,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:31,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:53:31,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:32,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:32,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:32,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 16:53:32,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629966014] [2020-12-23 16:53:32,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:53:32,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:53:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:53:32,088 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand 17 states. [2020-12-23 16:53:32,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:32,483 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2020-12-23 16:53:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:32,484 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-12-23 16:53:32,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:32,485 INFO L225 Difference]: With dead ends: 132 [2020-12-23 16:53:32,485 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 16:53:32,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:32,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 16:53:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 125. [2020-12-23 16:53:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 16:53:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2020-12-23 16:53:32,489 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 39 [2020-12-23 16:53:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:32,489 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2020-12-23 16:53:32,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:53:32,489 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2020-12-23 16:53:32,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:53:32,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:32,490 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:32,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:32,704 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:32,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:32,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1933652759, now seen corresponding path program 4 times [2020-12-23 16:53:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:32,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48315252] [2020-12-23 16:53:32,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:32,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48315252] [2020-12-23 16:53:32,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709507526] [2020-12-23 16:53:32,886 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:32,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:32,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:32,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 16:53:32,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:32,986 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_32|]} [2020-12-23 16:53:32,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:32,992 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:32,992 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,004 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,010 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:33,011 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,022 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,023 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,023 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:33,176 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:33,177 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,187 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-12-23 16:53:33,277 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:53:33,279 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,292 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,294 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:33,294 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:31 [2020-12-23 16:53:33,643 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,644 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 1 case distinctions, treesize of input 28 treesize of output 24 [2020-12-23 16:53:33,646 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:33,660 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:33,662 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:33,662 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:22 [2020-12-23 16:53:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:33,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:33,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 26 [2020-12-23 16:53:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975530702] [2020-12-23 16:53:33,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:33,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:33,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:33,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:33,837 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand 27 states. [2020-12-23 16:53:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:36,112 INFO L93 Difference]: Finished difference Result 201 states and 219 transitions. [2020-12-23 16:53:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:53:36,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 40 [2020-12-23 16:53:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:36,114 INFO L225 Difference]: With dead ends: 201 [2020-12-23 16:53:36,114 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 16:53:36,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=370, Invalid=1792, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 16:53:36,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 16:53:36,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 157. [2020-12-23 16:53:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 16:53:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2020-12-23 16:53:36,119 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 40 [2020-12-23 16:53:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:36,119 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2020-12-23 16:53:36,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:36,119 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2020-12-23 16:53:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 16:53:36,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:36,120 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:36,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,328 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:36,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:36,329 INFO L82 PathProgramCache]: Analyzing trace with hash -2043975595, now seen corresponding path program 3 times [2020-12-23 16:53:36,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:36,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400619670] [2020-12-23 16:53:36,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:36,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400619670] [2020-12-23 16:53:36,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809016852] [2020-12-23 16:53:36,482 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:53:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:36,601 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:36,601 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:36,604 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:36,626 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:53:36,629 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:36,629 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-23 16:53:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:36,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:36,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2020-12-23 16:53:36,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322106891] [2020-12-23 16:53:36,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:53:36,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:36,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:53:36,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:53:36,855 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand 19 states. [2020-12-23 16:53:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:37,524 INFO L93 Difference]: Finished difference Result 172 states and 191 transitions. [2020-12-23 16:53:37,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:37,525 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2020-12-23 16:53:37,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:37,526 INFO L225 Difference]: With dead ends: 172 [2020-12-23 16:53:37,526 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 16:53:37,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:53:37,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 16:53:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2020-12-23 16:53:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 16:53:37,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 180 transitions. [2020-12-23 16:53:37,531 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 180 transitions. Word has length 41 [2020-12-23 16:53:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:37,531 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 180 transitions. [2020-12-23 16:53:37,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:53:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 180 transitions. [2020-12-23 16:53:37,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:53:37,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:37,533 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:37,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:37,743 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash 782689156, now seen corresponding path program 3 times [2020-12-23 16:53:37,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072594458] [2020-12-23 16:53:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:38,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072594458] [2020-12-23 16:53:38,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981555795] [2020-12-23 16:53:38,602 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:38,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:38,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 16:53:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:39,122 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 14 treesize of output 10 [2020-12-23 16:53:39,123 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,136 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,137 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:29 [2020-12-23 16:53:39,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:39,212 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:53:39,213 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,232 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:39,232 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:39 [2020-12-23 16:53:39,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:39,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:39,590 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,590 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2020-12-23 16:53:39,592 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,611 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,613 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:39,614 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:35 [2020-12-23 16:53:39,728 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:39,731 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,734 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2020-12-23 16:53:39,735 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,761 INFO L625 ElimStorePlain]: treesize reduction 7, result has 82.1 percent of original size [2020-12-23 16:53:39,763 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:39,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:32 [2020-12-23 16:53:40,208 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:40,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:40,223 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:40,224 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 25 [2020-12-23 16:53:40,226 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:40,227 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:40,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:40,241 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:40,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:3 [2020-12-23 16:53:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:40,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:40,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2020-12-23 16:53:40,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781577905] [2020-12-23 16:53:40,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 16:53:40,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:40,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 16:53:40,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:53:40,265 INFO L87 Difference]: Start difference. First operand 161 states and 180 transitions. Second operand 41 states. [2020-12-23 16:53:41,827 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-23 16:53:42,138 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 16:53:42,396 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-12-23 16:53:42,658 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-12-23 16:53:42,939 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-12-23 16:53:43,144 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-12-23 16:53:43,330 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2020-12-23 16:53:43,515 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-12-23 16:53:43,716 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-12-23 16:53:43,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:43,746 INFO L93 Difference]: Finished difference Result 202 states and 222 transitions. [2020-12-23 16:53:43,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:53:43,747 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 42 [2020-12-23 16:53:43,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:43,748 INFO L225 Difference]: With dead ends: 202 [2020-12-23 16:53:43,748 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 16:53:43,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:53:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 16:53:43,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2020-12-23 16:53:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 16:53:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2020-12-23 16:53:43,754 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 42 [2020-12-23 16:53:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:43,755 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2020-12-23 16:53:43,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 16:53:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2020-12-23 16:53:43,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:53:43,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:43,755 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:43,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 16:53:43,968 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:43,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1061266009, now seen corresponding path program 2 times [2020-12-23 16:53:43,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425855818] [2020-12-23 16:53:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:44,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:44,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425855818] [2020-12-23 16:53:44,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165890870] [2020-12-23 16:53:44,133 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:44,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:44,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:44,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 16:53:44,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:44,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-12-23 16:53:44,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643087861] [2020-12-23 16:53:44,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:53:44,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:53:44,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:44,379 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand 18 states. [2020-12-23 16:53:44,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:44,878 INFO L93 Difference]: Finished difference Result 215 states and 231 transitions. [2020-12-23 16:53:44,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:44,878 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 42 [2020-12-23 16:53:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:44,880 INFO L225 Difference]: With dead ends: 215 [2020-12-23 16:53:44,880 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 16:53:44,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:53:44,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 16:53:44,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 151. [2020-12-23 16:53:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 16:53:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 167 transitions. [2020-12-23 16:53:44,886 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 167 transitions. Word has length 42 [2020-12-23 16:53:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:44,886 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 167 transitions. [2020-12-23 16:53:44,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:53:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 167 transitions. [2020-12-23 16:53:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:53:44,887 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:44,887 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:45,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 16:53:45,101 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1347919029, now seen corresponding path program 5 times [2020-12-23 16:53:45,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:45,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888719883] [2020-12-23 16:53:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:45,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888719883] [2020-12-23 16:53:45,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929475148] [2020-12-23 16:53:45,407 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:45,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:53:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:45,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 16:53:45,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:45,515 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_33|]} [2020-12-23 16:53:45,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:45,524 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:53:45,525 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,535 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:45,539 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:53:45,541 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,550 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:45,552 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,552 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:45,702 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:45,703 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,711 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:45,712 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,712 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:53:45,847 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:53:45,849 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:45,860 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:45,862 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:45,862 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:35 [2020-12-23 16:53:46,373 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:46,373 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 1 case distinctions, treesize of input 29 treesize of output 25 [2020-12-23 16:53:46,375 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:46,390 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:46,392 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:46,393 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:46,394 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2020-12-23 16:53:46,663 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:46,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:46,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2020-12-23 16:53:46,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538290611] [2020-12-23 16:53:46,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:53:46,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:53:46,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=924, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:53:46,665 INFO L87 Difference]: Start difference. First operand 151 states and 167 transitions. Second operand 32 states. [2020-12-23 16:53:48,300 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-12-23 16:53:48,664 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:53:49,968 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-23 16:53:50,205 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 16:53:50,655 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:53:51,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:51,132 INFO L93 Difference]: Finished difference Result 301 states and 328 transitions. [2020-12-23 16:53:51,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 16:53:51,133 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 43 [2020-12-23 16:53:51,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:51,134 INFO L225 Difference]: With dead ends: 301 [2020-12-23 16:53:51,134 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 16:53:51,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=435, Invalid=3225, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 16:53:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 16:53:51,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2020-12-23 16:53:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 16:53:51,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 197 transitions. [2020-12-23 16:53:51,141 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 197 transitions. Word has length 43 [2020-12-23 16:53:51,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:51,141 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 197 transitions. [2020-12-23 16:53:51,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:53:51,141 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 197 transitions. [2020-12-23 16:53:51,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:53:51,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:51,142 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:53:51,358 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 83468065, now seen corresponding path program 4 times [2020-12-23 16:53:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986751895] [2020-12-23 16:53:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 16:53:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986751895] [2020-12-23 16:53:51,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328682924] [2020-12-23 16:53:51,492 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:51,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:51,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:53:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:51,643 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:51,643 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:51,644 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:51,671 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:53:51,674 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:51,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:15 [2020-12-23 16:53:51,833 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 [2020-12-23 16:53:51,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:51,847 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:51,848 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:51,848 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:52,023 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,023 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 23 treesize of output 58 [2020-12-23 16:53:52,025 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,069 INFO L625 ElimStorePlain]: treesize reduction 24, result has 66.2 percent of original size [2020-12-23 16:53:52,071 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:52,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,072 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:39 [2020-12-23 16:53:52,137 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:52,166 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,167 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 23 treesize of output 58 [2020-12-23 16:53:52,169 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,176 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 11 treesize of output 7 [2020-12-23 16:53:52,177 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,237 INFO L625 ElimStorePlain]: treesize reduction 41, result has 55.9 percent of original size [2020-12-23 16:53:52,239 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2020-12-23 16:53:52,240 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:52 [2020-12-23 16:53:52,373 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:52,490 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:52,612 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:52,615 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:53:52,621 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 5, 1] term [2020-12-23 16:53:52,621 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:52,636 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2020-12-23 16:53:52,639 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:52,677 INFO L625 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2020-12-23 16:53:52,677 INFO L515 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2020-12-23 16:53:52,678 INFO L443 ElimStorePlain]: Different costs {2=[v_prenex_4], 6=[|#memory_int|]} [2020-12-23 16:53:52,679 INFO L515 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2020-12-23 16:53:52,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:52,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:52,685 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:52,687 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,687 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 3 case distinctions, treesize of input 24 treesize of output 13 [2020-12-23 16:53:52,689 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,699 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:52,701 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 2 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:52,701 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:80, output treesize:3 [2020-12-23 16:53:52,747 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:52,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:52,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-12-23 16:53:52,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072626481] [2020-12-23 16:53:52,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:52,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:52,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:52,750 INFO L87 Difference]: Start difference. First operand 178 states and 197 transitions. Second operand 23 states. [2020-12-23 16:53:53,800 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 16:53:53,973 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 16:53:54,425 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-23 16:53:55,738 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-23 16:54:00,019 WARN L197 SmtUtils]: Spent 4.20 s on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-23 16:54:00,503 WARN L197 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-12-23 16:54:04,838 WARN L197 SmtUtils]: Spent 4.25 s on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-12-23 16:54:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:04,927 INFO L93 Difference]: Finished difference Result 352 states and 380 transitions. [2020-12-23 16:54:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:54:04,928 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-12-23 16:54:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:04,930 INFO L225 Difference]: With dead ends: 352 [2020-12-23 16:54:04,930 INFO L226 Difference]: Without dead ends: 343 [2020-12-23 16:54:04,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=328, Invalid=2222, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 16:54:04,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2020-12-23 16:54:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 197. [2020-12-23 16:54:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-23 16:54:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2020-12-23 16:54:04,938 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 46 [2020-12-23 16:54:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2020-12-23 16:54:04,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:54:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2020-12-23 16:54:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:54:04,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:04,940 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:05,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 16:54:05,155 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1500484182, now seen corresponding path program 4 times [2020-12-23 16:54:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:05,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013695446] [2020-12-23 16:54:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 16:54:05,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013695446] [2020-12-23 16:54:05,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099830316] [2020-12-23 16:54:05,310 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:05,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:05,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 16:54:05,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:05,491 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,492 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:54:05,494 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,523 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:54:05,525 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,526 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:15 [2020-12-23 16:54:05,668 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 16 treesize of output 12 [2020-12-23 16:54:05,669 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,678 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,678 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,679 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 16:54:05,824 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:05,824 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 23 treesize of output 58 [2020-12-23 16:54:05,826 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,867 INFO L625 ElimStorePlain]: treesize reduction 22, result has 64.5 percent of original size [2020-12-23 16:54:05,870 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:05,870 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:33 [2020-12-23 16:54:06,005 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:06,014 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 11 treesize of output 7 [2020-12-23 16:54:06,015 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:06,041 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:06,042 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 23 treesize of output 58 [2020-12-23 16:54:06,046 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:06,121 INFO L625 ElimStorePlain]: treesize reduction 27, result has 69.0 percent of original size [2020-12-23 16:54:06,124 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 16:54:06,124 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:63, output treesize:42 [2020-12-23 16:54:06,276 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:06,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:06,278 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:06,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:06,280 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 3, 2, 1] term [2020-12-23 16:54:06,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:06,283 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:06,284 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:06,285 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 16:54:06,298 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2020-12-23 16:54:06,299 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:06,303 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2020-12-23 16:54:06,305 INFO L547 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:06,326 INFO L625 ElimStorePlain]: treesize reduction 19, result has 54.8 percent of original size [2020-12-23 16:54:06,327 INFO L515 ElimStorePlain]: Eliminatee v_prenex_5 vanished before elimination [2020-12-23 16:54:06,328 INFO L443 ElimStorePlain]: Different costs {0=[v_prenex_6], 2=[|#memory_int|]} [2020-12-23 16:54:06,328 INFO L515 ElimStorePlain]: Eliminatee v_prenex_6 vanished before elimination [2020-12-23 16:54:06,331 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:06,333 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:06,334 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 17 treesize of output 10 [2020-12-23 16:54:06,334 INFO L547 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:06,341 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:06,343 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:06,343 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:71, output treesize:3 [2020-12-23 16:54:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:06,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:06,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2020-12-23 16:54:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81532085] [2020-12-23 16:54:06,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:54:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:54:06,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:54:06,395 INFO L87 Difference]: Start difference. First operand 197 states and 217 transitions. Second operand 23 states. [2020-12-23 16:54:07,643 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:09,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:09,506 INFO L93 Difference]: Finished difference Result 295 states and 315 transitions. [2020-12-23 16:54:09,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 16:54:09,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-12-23 16:54:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:09,509 INFO L225 Difference]: With dead ends: 295 [2020-12-23 16:54:09,509 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 16:54:09,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=336, Invalid=2420, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:54:09,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 16:54:09,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 200. [2020-12-23 16:54:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 16:54:09,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 219 transitions. [2020-12-23 16:54:09,517 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 219 transitions. Word has length 46 [2020-12-23 16:54:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:09,517 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 219 transitions. [2020-12-23 16:54:09,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:54:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 219 transitions. [2020-12-23 16:54:09,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 16:54:09,518 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:09,518 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:09,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:54:09,733 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:09,733 INFO L82 PathProgramCache]: Analyzing trace with hash -691661592, now seen corresponding path program 5 times [2020-12-23 16:54:09,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:09,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480795402] [2020-12-23 16:54:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480795402] [2020-12-23 16:54:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453952582] [2020-12-23 16:54:10,861 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:11,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 16:54:11,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:11,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 16:54:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:11,288 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 14 treesize of output 10 [2020-12-23 16:54:11,290 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:11,303 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,305 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:11,305 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 16:54:11,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:11,542 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:11,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:11,558 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,560 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:11,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:22 [2020-12-23 16:54:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:11,727 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:54:11,729 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:11,743 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,746 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:11,746 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:22 [2020-12-23 16:54:11,849 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:11,862 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,866 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 21 treesize of output 38 [2020-12-23 16:54:11,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:11,896 INFO L625 ElimStorePlain]: treesize reduction 18, result has 59.1 percent of original size [2020-12-23 16:54:11,897 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:11,898 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:26 [2020-12-23 16:54:12,066 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:12,069 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:12,070 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 17 treesize of output 10 [2020-12-23 16:54:12,075 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:12,082 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:12,083 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:12,084 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2020-12-23 16:54:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:12,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:12,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 36 [2020-12-23 16:54:12,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561417301] [2020-12-23 16:54:12,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:54:12,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:12,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:54:12,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:54:12,110 INFO L87 Difference]: Start difference. First operand 200 states and 219 transitions. Second operand 36 states. [2020-12-23 16:54:13,921 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 16:54:14,619 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-12-23 16:54:14,828 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-12-23 16:54:15,376 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-23 16:54:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:16,198 INFO L93 Difference]: Finished difference Result 232 states and 250 transitions. [2020-12-23 16:54:16,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:54:16,202 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 48 [2020-12-23 16:54:16,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:16,203 INFO L225 Difference]: With dead ends: 232 [2020-12-23 16:54:16,203 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 16:54:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=503, Invalid=3279, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 16:54:16,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 16:54:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-12-23 16:54:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 16:54:16,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 188 transitions. [2020-12-23 16:54:16,211 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 188 transitions. Word has length 48 [2020-12-23 16:54:16,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:16,212 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 188 transitions. [2020-12-23 16:54:16,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:54:16,212 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 188 transitions. [2020-12-23 16:54:16,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:54:16,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:16,219 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:16,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:16,420 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:16,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:16,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1700052269, now seen corresponding path program 6 times [2020-12-23 16:54:16,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:16,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339269976] [2020-12-23 16:54:16,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339269976] [2020-12-23 16:54:16,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893939329] [2020-12-23 16:54:16,853 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:16,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 16:54:16,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 16:54:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:16,970 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_29|], 1=[|v_#valid_34|]} [2020-12-23 16:54:16,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:16,977 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:16,978 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:16,987 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:16,995 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:16,997 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:17,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,011 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:54:17,259 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:17,260 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,269 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:17,270 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:54:17,491 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:54:17,492 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,505 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:17,507 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:17,507 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-23 16:54:17,604 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:54:17,606 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:17,622 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:17,624 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:17,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:37 [2020-12-23 16:54:17,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2020-12-23 16:54:17,998 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:18,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:18,026 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:18,027 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 10 [2020-12-23 16:54:18,029 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:18,043 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:18,046 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:18,046 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 7 variables, input treesize:51, output treesize:3 [2020-12-23 16:54:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:18,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:18,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2020-12-23 16:54:18,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111179456] [2020-12-23 16:54:18,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:54:18,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:18,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:54:18,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:18,064 INFO L87 Difference]: Start difference. First operand 171 states and 188 transitions. Second operand 32 states. [2020-12-23 16:54:20,604 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:54:20,781 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-12-23 16:54:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:22,996 INFO L93 Difference]: Finished difference Result 269 states and 287 transitions. [2020-12-23 16:54:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:54:22,997 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 49 [2020-12-23 16:54:22,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:22,998 INFO L225 Difference]: With dead ends: 269 [2020-12-23 16:54:22,999 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 16:54:23,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=575, Invalid=3715, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 16:54:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 16:54:23,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 205. [2020-12-23 16:54:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-12-23 16:54:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-12-23 16:54:23,007 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 49 [2020-12-23 16:54:23,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:23,007 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-12-23 16:54:23,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:54:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-12-23 16:54:23,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 16:54:23,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:23,008 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:23,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:54:23,220 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:23,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:23,221 INFO L82 PathProgramCache]: Analyzing trace with hash 619571974, now seen corresponding path program 6 times [2020-12-23 16:54:23,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:23,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212381737] [2020-12-23 16:54:23,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:23,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212381737] [2020-12-23 16:54:23,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739062041] [2020-12-23 16:54:23,634 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:23,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 16:54:23,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 16:54:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:23,780 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:23,782 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,789 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:23,790 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,791 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:54:24,181 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:54:24,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,194 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,195 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,195 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2020-12-23 16:54:24,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:24,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,276 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:24,277 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:28 [2020-12-23 16:54:24,461 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2020-12-23 16:54:24,463 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:24,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:24,477 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:28 [2020-12-23 16:54:25,203 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:25,204 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 1 case distinctions, treesize of input 25 treesize of output 21 [2020-12-23 16:54:25,206 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:25,225 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:54:25,227 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:25,228 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:35, output treesize:3 [2020-12-23 16:54:25,250 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 10 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:25,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:25,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2020-12-23 16:54:25,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159580266] [2020-12-23 16:54:25,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:54:25,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:25,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:54:25,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:54:25,252 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 36 states. [2020-12-23 16:54:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:28,496 INFO L93 Difference]: Finished difference Result 394 states and 422 transitions. [2020-12-23 16:54:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:54:28,497 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2020-12-23 16:54:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:28,499 INFO L225 Difference]: With dead ends: 394 [2020-12-23 16:54:28,499 INFO L226 Difference]: Without dead ends: 344 [2020-12-23 16:54:28,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=403, Invalid=3629, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:54:28,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-12-23 16:54:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 233. [2020-12-23 16:54:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-12-23 16:54:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 259 transitions. [2020-12-23 16:54:28,507 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 259 transitions. Word has length 50 [2020-12-23 16:54:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:28,507 INFO L481 AbstractCegarLoop]: Abstraction has 233 states and 259 transitions. [2020-12-23 16:54:28,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:54:28,507 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 259 transitions. [2020-12-23 16:54:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:54:28,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:28,509 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:28,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:28,723 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1515833686, now seen corresponding path program 7 times [2020-12-23 16:54:28,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:28,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108525196] [2020-12-23 16:54:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:28,990 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108525196] [2020-12-23 16:54:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092295618] [2020-12-23 16:54:28,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:29,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:54:29,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:29,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:29,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2020-12-23 16:54:29,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532898706] [2020-12-23 16:54:29,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:54:29,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:54:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:54:29,396 INFO L87 Difference]: Start difference. First operand 233 states and 259 transitions. Second operand 23 states. [2020-12-23 16:54:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:30,286 INFO L93 Difference]: Finished difference Result 261 states and 283 transitions. [2020-12-23 16:54:30,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:54:30,287 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 53 [2020-12-23 16:54:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:30,288 INFO L225 Difference]: With dead ends: 261 [2020-12-23 16:54:30,288 INFO L226 Difference]: Without dead ends: 261 [2020-12-23 16:54:30,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:54:30,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-23 16:54:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-12-23 16:54:30,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-12-23 16:54:30,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 271 transitions. [2020-12-23 16:54:30,294 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 271 transitions. Word has length 53 [2020-12-23 16:54:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:30,295 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 271 transitions. [2020-12-23 16:54:30,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:54:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 271 transitions. [2020-12-23 16:54:30,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 16:54:30,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:30,296 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:30,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 16:54:30,511 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:30,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1091680797, now seen corresponding path program 7 times [2020-12-23 16:54:30,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:30,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016475222] [2020-12-23 16:54:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:30,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016475222] [2020-12-23 16:54:30,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085942645] [2020-12-23 16:54:30,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:30,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:54:30,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:31,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:31,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-23 16:54:31,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568216898] [2020-12-23 16:54:31,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:54:31,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:31,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:54:31,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:54:31,285 INFO L87 Difference]: Start difference. First operand 241 states and 271 transitions. Second operand 26 states. [2020-12-23 16:54:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:32,502 INFO L93 Difference]: Finished difference Result 349 states and 381 transitions. [2020-12-23 16:54:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:54:32,502 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 54 [2020-12-23 16:54:32,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:32,504 INFO L225 Difference]: With dead ends: 349 [2020-12-23 16:54:32,504 INFO L226 Difference]: Without dead ends: 349 [2020-12-23 16:54:32,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:54:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-12-23 16:54:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 287. [2020-12-23 16:54:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 16:54:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 323 transitions. [2020-12-23 16:54:32,519 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 323 transitions. Word has length 54 [2020-12-23 16:54:32,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:32,519 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 323 transitions. [2020-12-23 16:54:32,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:54:32,519 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 323 transitions. [2020-12-23 16:54:32,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 16:54:32,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:32,520 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:32,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:32,734 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:32,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:32,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1915462492, now seen corresponding path program 5 times [2020-12-23 16:54:32,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:32,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232919229] [2020-12-23 16:54:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232919229] [2020-12-23 16:54:32,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426945244] [2020-12-23 16:54:32,958 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:33,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:54:33,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:33,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 16:54:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:33,261 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:33,262 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:54:33,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:33,293 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:54:33,295 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:33,296 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:15 [2020-12-23 16:54:33,669 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:33,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:33,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2020-12-23 16:54:33,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241371636] [2020-12-23 16:54:33,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:54:33,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:33,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:54:33,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:54:33,671 INFO L87 Difference]: Start difference. First operand 287 states and 323 transitions. Second operand 23 states. [2020-12-23 16:54:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:34,572 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-12-23 16:54:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:54:34,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-12-23 16:54:34,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:34,575 INFO L225 Difference]: With dead ends: 318 [2020-12-23 16:54:34,575 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 16:54:34,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:54:34,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 16:54:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 292. [2020-12-23 16:54:34,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-23 16:54:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 328 transitions. [2020-12-23 16:54:34,583 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 328 transitions. Word has length 54 [2020-12-23 16:54:34,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:34,583 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 328 transitions. [2020-12-23 16:54:34,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:54:34,583 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 328 transitions. [2020-12-23 16:54:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-12-23 16:54:34,584 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:34,584 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:34,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 16:54:34,796 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 750204906, now seen corresponding path program 3 times [2020-12-23 16:54:34,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:34,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951793775] [2020-12-23 16:54:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:34,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:35,005 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951793775] [2020-12-23 16:54:35,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318149013] [2020-12-23 16:54:35,006 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:35,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:54:35,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:35,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:54:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:35,232 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_36|]} [2020-12-23 16:54:35,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:35,241 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:35,242 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,256 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,263 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:35,265 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,277 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:35,279 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:35,280 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:13 [2020-12-23 16:54:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:35,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:35,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2020-12-23 16:54:35,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728563437] [2020-12-23 16:54:35,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:54:35,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:35,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:54:35,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:54:35,782 INFO L87 Difference]: Start difference. First operand 292 states and 328 transitions. Second operand 25 states. [2020-12-23 16:54:37,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:37,612 INFO L93 Difference]: Finished difference Result 432 states and 465 transitions. [2020-12-23 16:54:37,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:54:37,613 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-12-23 16:54:37,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:37,615 INFO L225 Difference]: With dead ends: 432 [2020-12-23 16:54:37,615 INFO L226 Difference]: Without dead ends: 429 [2020-12-23 16:54:37,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:54:37,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2020-12-23 16:54:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 291. [2020-12-23 16:54:37,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-23 16:54:37,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 324 transitions. [2020-12-23 16:54:37,623 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 324 transitions. Word has length 55 [2020-12-23 16:54:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:37,624 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 324 transitions. [2020-12-23 16:54:37,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:54:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 324 transitions. [2020-12-23 16:54:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:54:37,625 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:37,625 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:37,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:37,826 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:37,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:37,826 INFO L82 PathProgramCache]: Analyzing trace with hash 915239870, now seen corresponding path program 8 times [2020-12-23 16:54:37,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:37,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900738139] [2020-12-23 16:54:37,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:38,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900738139] [2020-12-23 16:54:38,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245067058] [2020-12-23 16:54:38,330 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:38,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:38,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:38,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 16:54:38,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:38,446 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:38,447 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,452 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:38,453 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:54:38,743 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:38,744 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,753 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:38,755 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:38,755 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:54:38,958 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:38,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:38,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:38,979 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:38,979 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:54:39,070 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:54:39,071 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:39,085 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:39,087 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:39,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:28 [2020-12-23 16:54:39,546 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:39,546 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 1 case distinctions, treesize of input 25 treesize of output 21 [2020-12-23 16:54:39,549 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:39,568 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:54:39,571 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:39,571 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:35, output treesize:3 [2020-12-23 16:54:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:54:39,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:39,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2020-12-23 16:54:39,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920310514] [2020-12-23 16:54:39,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:54:39,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:39,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:54:39,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:54:39,588 INFO L87 Difference]: Start difference. First operand 291 states and 324 transitions. Second operand 37 states. [2020-12-23 16:54:42,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:42,045 INFO L93 Difference]: Finished difference Result 355 states and 386 transitions. [2020-12-23 16:54:42,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:54:42,046 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 56 [2020-12-23 16:54:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:42,048 INFO L225 Difference]: With dead ends: 355 [2020-12-23 16:54:42,049 INFO L226 Difference]: Without dead ends: 329 [2020-12-23 16:54:42,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=2394, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 16:54:42,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-12-23 16:54:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 287. [2020-12-23 16:54:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-23 16:54:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 318 transitions. [2020-12-23 16:54:42,055 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 318 transitions. Word has length 56 [2020-12-23 16:54:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:42,055 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 318 transitions. [2020-12-23 16:54:42,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:54:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 318 transitions. [2020-12-23 16:54:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:54:42,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:42,057 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:42,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 16:54:42,269 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:42,270 INFO L82 PathProgramCache]: Analyzing trace with hash -770207727, now seen corresponding path program 8 times [2020-12-23 16:54:42,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:42,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446420114] [2020-12-23 16:54:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:42,773 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:42,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446420114] [2020-12-23 16:54:42,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745436046] [2020-12-23 16:54:42,773 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:42,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:42,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:42,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:54:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:42,894 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_38|]} [2020-12-23 16:54:42,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:42,901 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:42,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:42,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:42,917 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:42,919 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:42,929 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:42,930 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:42,931 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:54:43,251 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:43,252 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:43,266 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:54:43,440 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2020-12-23 16:54:43,442 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:43,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:43,457 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:43,458 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:39, output treesize:35 [2020-12-23 16:54:44,389 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,389 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 1 case distinctions, treesize of input 29 treesize of output 25 [2020-12-23 16:54:44,391 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:44,413 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:44,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:44,416 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:44,417 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:35 [2020-12-23 16:54:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:44,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:44,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2020-12-23 16:54:44,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609114508] [2020-12-23 16:54:44,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 16:54:44,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:44,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 16:54:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:54:44,795 INFO L87 Difference]: Start difference. First operand 287 states and 318 transitions. Second operand 40 states. [2020-12-23 16:54:47,181 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-12-23 16:54:47,397 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-12-23 16:54:47,892 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:54:48,211 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-23 16:54:48,905 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-23 16:54:49,447 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:54:49,850 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-23 16:54:50,311 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-23 16:54:50,594 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-12-23 16:54:51,096 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-23 16:54:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:51,985 INFO L93 Difference]: Finished difference Result 504 states and 550 transitions. [2020-12-23 16:54:51,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 16:54:51,985 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 57 [2020-12-23 16:54:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:51,989 INFO L225 Difference]: With dead ends: 504 [2020-12-23 16:54:51,989 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 16:54:51,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=589, Invalid=4961, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 16:54:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 16:54:51,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 318. [2020-12-23 16:54:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-12-23 16:54:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 353 transitions. [2020-12-23 16:54:51,997 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 353 transitions. Word has length 57 [2020-12-23 16:54:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:51,997 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 353 transitions. [2020-12-23 16:54:51,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 16:54:51,998 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 353 transitions. [2020-12-23 16:54:51,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 16:54:51,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:51,999 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:52,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:52,213 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:54:52,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:52,214 INFO L82 PathProgramCache]: Analyzing trace with hash 221172411, now seen corresponding path program 6 times [2020-12-23 16:54:52,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:52,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673920887] [2020-12-23 16:54:52,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 16:54:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673920887] [2020-12-23 16:54:52,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700141142] [2020-12-23 16:54:52,435 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:52,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:54:52,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:52,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 116 conjunts are in the unsatisfiable core [2020-12-23 16:54:52,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:52,641 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_33|], 1=[|v_#valid_39|]} [2020-12-23 16:54:52,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:52,646 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:52,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,669 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:52,671 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,686 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2020-12-23 16:54:52,896 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:52,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,910 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,910 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,911 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2020-12-23 16:54:53,080 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:53,085 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,098 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,100 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:53,229 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:53,232 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,248 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:53,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:54:53,385 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,400 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,401 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,402 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:27 [2020-12-23 16:54:53,544 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,544 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 19 treesize of output 19 [2020-12-23 16:54:53,546 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:53,557 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,558 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,558 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2020-12-23 16:54:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:53,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:53,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 29 [2020-12-23 16:54:53,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398289947] [2020-12-23 16:54:53,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:54:53,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:53,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:54:53,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=749, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:54:53,758 INFO L87 Difference]: Start difference. First operand 318 states and 353 transitions. Second operand 29 states. [2020-12-23 16:54:55,489 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:55,989 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:56,197 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:54:56,444 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:56,615 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:57,056 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-23 16:54:57,519 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-23 16:54:57,872 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:54:58,032 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:58,412 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 48 [2020-12-23 16:54:58,750 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-23 16:54:59,113 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:54:59,466 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-12-23 16:54:59,680 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 16:55:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:01,095 INFO L93 Difference]: Finished difference Result 547 states and 588 transitions. [2020-12-23 16:55:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 16:55:01,096 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 59 [2020-12-23 16:55:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:01,099 INFO L225 Difference]: With dead ends: 547 [2020-12-23 16:55:01,099 INFO L226 Difference]: Without dead ends: 522 [2020-12-23 16:55:01,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=652, Invalid=4750, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 16:55:01,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-23 16:55:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 372. [2020-12-23 16:55:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-12-23 16:55:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 411 transitions. [2020-12-23 16:55:01,109 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 411 transitions. Word has length 59 [2020-12-23 16:55:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:01,109 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 411 transitions. [2020-12-23 16:55:01,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:55:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 411 transitions. [2020-12-23 16:55:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 16:55:01,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:01,110 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:01,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 16:55:01,324 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:01,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1306777250, now seen corresponding path program 9 times [2020-12-23 16:55:01,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:01,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631340753] [2020-12-23 16:55:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:02,003 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 46 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:55:02,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631340753] [2020-12-23 16:55:02,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706242835] [2020-12-23 16:55:02,004 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:02,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:55:02,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 16:55:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:02,188 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_40|]} [2020-12-23 16:55:02,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:02,193 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:55:02,194 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,203 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,208 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:02,210 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,218 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,220 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,220 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:21, output treesize:13 [2020-12-23 16:55:02,304 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2020-12-23 16:55:02,305 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,311 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,312 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 16:55:02,464 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:55:02,465 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,474 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,476 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,476 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:16 [2020-12-23 16:55:02,490 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:55:02,491 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,500 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,502 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,502 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:16 [2020-12-23 16:55:02,517 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:55:02,519 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,527 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,528 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:02,529 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:23 [2020-12-23 16:55:02,709 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,709 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 1 case distinctions, treesize of input 28 treesize of output 24 [2020-12-23 16:55:02,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:02,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:02,726 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:02,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:19 [2020-12-23 16:55:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-23 16:55:02,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:02,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 10] total 32 [2020-12-23 16:55:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997045476] [2020-12-23 16:55:02,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:55:02,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:02,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:55:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=920, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:55:02,956 INFO L87 Difference]: Start difference. First operand 372 states and 411 transitions. Second operand 32 states. [2020-12-23 16:55:06,350 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 16:55:07,238 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-12-23 16:55:07,694 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-12-23 16:55:08,051 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-12-23 16:55:08,357 WARN L197 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-12-23 16:55:08,654 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-12-23 16:55:08,861 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-23 16:55:09,372 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:55:10,819 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-23 16:55:11,163 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-12-23 16:55:11,581 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 16:55:11,878 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2020-12-23 16:55:12,079 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-23 16:55:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:12,088 INFO L93 Difference]: Finished difference Result 459 states and 491 transitions. [2020-12-23 16:55:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 16:55:12,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 16:55:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:12,090 INFO L225 Difference]: With dead ends: 459 [2020-12-23 16:55:12,091 INFO L226 Difference]: Without dead ends: 245 [2020-12-23 16:55:12,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1023, Invalid=9077, Unknown=0, NotChecked=0, Total=10100 [2020-12-23 16:55:12,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-23 16:55:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 181. [2020-12-23 16:55:12,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 16:55:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 192 transitions. [2020-12-23 16:55:12,096 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 192 transitions. Word has length 62 [2020-12-23 16:55:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:12,096 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 192 transitions. [2020-12-23 16:55:12,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:55:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 192 transitions. [2020-12-23 16:55:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 16:55:12,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:12,097 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:12,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 16:55:12,312 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:12,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:12,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1486105840, now seen corresponding path program 4 times [2020-12-23 16:55:12,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:12,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113564331] [2020-12-23 16:55:12,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:55:12,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113564331] [2020-12-23 16:55:12,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154955314] [2020-12-23 16:55:12,601 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:12,959 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:55:12,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 16:55:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:55:13,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:13,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2020-12-23 16:55:13,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891215792] [2020-12-23 16:55:13,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:55:13,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:13,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:55:13,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:55:13,319 INFO L87 Difference]: Start difference. First operand 181 states and 192 transitions. Second operand 24 states. [2020-12-23 16:55:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:14,053 INFO L93 Difference]: Finished difference Result 192 states and 200 transitions. [2020-12-23 16:55:14,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:55:14,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 64 [2020-12-23 16:55:14,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:14,057 INFO L225 Difference]: With dead ends: 192 [2020-12-23 16:55:14,057 INFO L226 Difference]: Without dead ends: 189 [2020-12-23 16:55:14,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:55:14,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-12-23 16:55:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2020-12-23 16:55:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 16:55:14,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2020-12-23 16:55:14,062 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 64 [2020-12-23 16:55:14,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:14,062 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2020-12-23 16:55:14,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:55:14,062 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2020-12-23 16:55:14,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-23 16:55:14,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:14,063 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:14,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 16:55:14,278 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:14,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:14,279 INFO L82 PathProgramCache]: Analyzing trace with hash -95303595, now seen corresponding path program 1 times [2020-12-23 16:55:14,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:14,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558920328] [2020-12-23 16:55:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558920328] [2020-12-23 16:55:15,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088769301] [2020-12-23 16:55:15,241 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:15,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 16:55:15,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:15,359 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:15,363 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:15,368 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:15,369 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:15,369 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:55:15,707 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:15,708 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:15,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:15,719 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:15,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:55:15,976 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:15,978 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:15,992 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:15,994 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:15,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:55:16,125 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:16,127 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:16,139 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,140 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:14 [2020-12-23 16:55:16,224 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:55:16,226 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,235 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:16,237 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,238 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:12 [2020-12-23 16:55:16,314 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:55:16,316 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,318 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:16,319 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:16,319 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:55:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:55:16,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:16,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 18] total 37 [2020-12-23 16:55:16,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479715110] [2020-12-23 16:55:16,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:55:16,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:16,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:55:16,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:55:16,339 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand 37 states. [2020-12-23 16:55:18,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:18,970 INFO L93 Difference]: Finished difference Result 183 states and 189 transitions. [2020-12-23 16:55:18,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:55:18,971 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 67 [2020-12-23 16:55:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:18,973 INFO L225 Difference]: With dead ends: 183 [2020-12-23 16:55:18,973 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 16:55:18,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=267, Invalid=2595, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:55:18,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 16:55:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-12-23 16:55:18,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-12-23 16:55:18,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-12-23 16:55:18,976 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 67 [2020-12-23 16:55:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:18,976 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-12-23 16:55:18,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:55:18,977 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-12-23 16:55:18,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 16:55:18,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:18,978 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:19,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 16:55:19,185 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:19,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:19,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1808652158, now seen corresponding path program 7 times [2020-12-23 16:55:19,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:19,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200238387] [2020-12-23 16:55:19,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 26 proven. 66 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 16:55:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200238387] [2020-12-23 16:55:19,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907658960] [2020-12-23 16:55:19,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:19,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 96 conjunts are in the unsatisfiable core [2020-12-23 16:55:19,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:19,661 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:19,663 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:19,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:19,670 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:19,671 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:55:19,996 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:19,997 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:20,009 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:20,010 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:20,010 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:55:20,239 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:20,241 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:20,254 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:20,256 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:20,257 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:55:20,407 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:20,408 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:20,420 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:20,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:20,422 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:55:20,605 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:20,607 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:20,621 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:20,624 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:20,624 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:55:20,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2020-12-23 16:55:20,834 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:20,847 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:20,849 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:20,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:21 [2020-12-23 16:55:21,056 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:21,056 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 18 treesize of output 18 [2020-12-23 16:55:21,058 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:21,076 INFO L625 ElimStorePlain]: treesize reduction 5, result has 66.7 percent of original size [2020-12-23 16:55:21,078 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:21,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:24, output treesize:3 [2020-12-23 16:55:21,171 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-23 16:55:21,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:21,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21] total 34 [2020-12-23 16:55:21,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106861543] [2020-12-23 16:55:21,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 16:55:21,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:21,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 16:55:21,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1050, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:55:21,172 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 34 states. [2020-12-23 16:55:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:26,548 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2020-12-23 16:55:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 16:55:26,549 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-12-23 16:55:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:26,550 INFO L225 Difference]: With dead ends: 208 [2020-12-23 16:55:26,550 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 16:55:26,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=514, Invalid=5648, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 16:55:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 16:55:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2020-12-23 16:55:26,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:55:26,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2020-12-23 16:55:26,554 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 72 [2020-12-23 16:55:26,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:26,554 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2020-12-23 16:55:26,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 16:55:26,554 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2020-12-23 16:55:26,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 16:55:26,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:26,555 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:26,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:26,768 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:26,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:26,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1747935736, now seen corresponding path program 8 times [2020-12-23 16:55:26,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:26,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343314804] [2020-12-23 16:55:26,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 16:55:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343314804] [2020-12-23 16:55:27,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401855306] [2020-12-23 16:55:27,160 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:27,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:27,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 16:55:27,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:27,306 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:27,307 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:55:27,309 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:27,341 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:55:27,344 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:27,344 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-23 16:55:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 16:55:28,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:28,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 30 [2020-12-23 16:55:28,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332507921] [2020-12-23 16:55:28,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:55:28,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:55:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:55:28,066 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand 31 states. [2020-12-23 16:55:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:29,320 INFO L93 Difference]: Finished difference Result 101 states and 103 transitions. [2020-12-23 16:55:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:55:29,321 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 80 [2020-12-23 16:55:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:29,322 INFO L225 Difference]: With dead ends: 101 [2020-12-23 16:55:29,323 INFO L226 Difference]: Without dead ends: 101 [2020-12-23 16:55:29,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=1306, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:55:29,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-23 16:55:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-12-23 16:55:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 16:55:29,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-12-23 16:55:29,325 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 80 [2020-12-23 16:55:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-12-23 16:55:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:55:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-12-23 16:55:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-23 16:55:29,326 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:29,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:29,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:29,540 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:29,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1648567018, now seen corresponding path program 5 times [2020-12-23 16:55:29,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:29,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951952635] [2020-12-23 16:55:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 15 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 16:55:29,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951952635] [2020-12-23 16:55:29,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412623536] [2020-12-23 16:55:29,981 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:30,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 16:55:30,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:30,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 16:55:30,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:30,648 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_43|]} [2020-12-23 16:55:30,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:30,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:55:30,654 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:30,664 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:30,669 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:30,671 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:30,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:30,682 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:30,682 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-23 16:55:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 28 proven. 87 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-23 16:55:31,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:31,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 29 [2020-12-23 16:55:31,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43037015] [2020-12-23 16:55:31,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:55:31,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:31,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:55:31,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:55:31,340 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 30 states. [2020-12-23 16:55:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:32,555 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-12-23 16:55:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:55:32,556 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-12-23 16:55:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:32,557 INFO L225 Difference]: With dead ends: 99 [2020-12-23 16:55:32,557 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 16:55:32,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=1286, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:55:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 16:55:32,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 16:55:32,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:55:32,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-12-23 16:55:32,560 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 81 [2020-12-23 16:55:32,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:32,560 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-12-23 16:55:32,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:55:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-12-23 16:55:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-12-23 16:55:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:32,561 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:32,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 16:55:32,775 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1958346265, now seen corresponding path program 9 times [2020-12-23 16:55:32,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:32,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546797253] [2020-12-23 16:55:32,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 32 proven. 105 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-23 16:55:33,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546797253] [2020-12-23 16:55:33,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032526743] [2020-12-23 16:55:33,213 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:33,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:55:33,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:33,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-23 16:55:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:33,836 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:55:33,838 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:33,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:33,847 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:33,847 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:55:34,790 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:34,793 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:34,807 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:34,808 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:34,809 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:55:35,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:35,142 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:35,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:35,161 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:35,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:23 [2020-12-23 16:55:35,400 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:35,402 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:35,419 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:35,422 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:35,423 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:23 [2020-12-23 16:55:35,679 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:35,682 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:35,703 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:35,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:35,707 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:23 [2020-12-23 16:55:36,006 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:36,008 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,029 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:23 [2020-12-23 16:55:36,310 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:55:36,312 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,330 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,333 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:36,334 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:34, output treesize:23 [2020-12-23 16:55:36,593 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:55:36,597 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,597 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 17 treesize of output 10 [2020-12-23 16:55:36,598 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,606 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,608 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,608 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2020-12-23 16:55:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:36,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:36,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 31] total 46 [2020-12-23 16:55:36,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743605775] [2020-12-23 16:55:36,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:55:36,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:36,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:55:36,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:55:36,719 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 46 states. [2020-12-23 16:55:39,456 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-23 16:55:39,791 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-23 16:55:40,038 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-12-23 16:55:44,117 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-12-23 16:55:45,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:45,471 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2020-12-23 16:55:45,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 16:55:45,472 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 85 [2020-12-23 16:55:45,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:45,473 INFO L225 Difference]: With dead ends: 234 [2020-12-23 16:55:45,473 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 16:55:45,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=658, Invalid=8848, Unknown=0, NotChecked=0, Total=9506 [2020-12-23 16:55:45,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 16:55:45,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2020-12-23 16:55:45,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 16:55:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-12-23 16:55:45,477 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 85 [2020-12-23 16:55:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:45,477 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-12-23 16:55:45,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:55:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-12-23 16:55:45,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-23 16:55:45,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:45,478 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:45,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:45,693 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash -626365011, now seen corresponding path program 10 times [2020-12-23 16:55:45,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:45,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26495763] [2020-12-23 16:55:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 28 proven. 131 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26495763] [2020-12-23 16:55:46,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286695187] [2020-12-23 16:55:46,296 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:47,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:55:47,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:47,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 16:55:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:47,185 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:47,186 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:55:47,188 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:47,226 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:55:47,229 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:47,229 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-12-23 16:55:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 114 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:47,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:47,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2020-12-23 16:55:47,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716082381] [2020-12-23 16:55:47,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:55:47,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:55:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:55:47,804 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 27 states. [2020-12-23 16:55:49,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:49,189 INFO L93 Difference]: Finished difference Result 115 states and 118 transitions. [2020-12-23 16:55:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:55:49,191 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2020-12-23 16:55:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:49,192 INFO L225 Difference]: With dead ends: 115 [2020-12-23 16:55:49,192 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 16:55:49,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:55:49,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 16:55:49,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2020-12-23 16:55:49,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 16:55:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-12-23 16:55:49,196 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 93 [2020-12-23 16:55:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:49,196 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-12-23 16:55:49,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:55:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-12-23 16:55:49,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 16:55:49,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:49,197 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:49,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:49,413 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:49,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2057521153, now seen corresponding path program 6 times [2020-12-23 16:55:49,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:49,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625491415] [2020-12-23 16:55:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:49,970 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 137 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625491415] [2020-12-23 16:55:49,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110317840] [2020-12-23 16:55:49,971 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:50,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 16:55:50,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:50,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 16:55:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 45 proven. 120 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:51,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:51,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-12-23 16:55:51,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049927856] [2020-12-23 16:55:51,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:55:51,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:51,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:55:51,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:55:51,515 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 37 states. [2020-12-23 16:55:53,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:53,448 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2020-12-23 16:55:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:55:53,449 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 94 [2020-12-23 16:55:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:53,450 INFO L225 Difference]: With dead ends: 115 [2020-12-23 16:55:53,450 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 16:55:53,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=573, Invalid=2183, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:55:53,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 16:55:53,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2020-12-23 16:55:53,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 16:55:53,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-12-23 16:55:53,453 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 94 [2020-12-23 16:55:53,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:53,453 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-12-23 16:55:53,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:55:53,453 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-12-23 16:55:53,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-23 16:55:53,454 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:53,454 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:53,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:53,669 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:53,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:53,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2095276484, now seen corresponding path program 2 times [2020-12-23 16:55:53,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:53,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477842456] [2020-12-23 16:55:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:54,255 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 28 proven. 125 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477842456] [2020-12-23 16:55:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599658306] [2020-12-23 16:55:54,255 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:54,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:54,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:54,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 16:55:54,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 45 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:55:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:54,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 28 [2020-12-23 16:55:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554861617] [2020-12-23 16:55:54,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:55:54,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:54,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:55:54,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:55:54,952 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 29 states. [2020-12-23 16:55:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:56,243 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2020-12-23 16:55:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 16:55:56,245 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 97 [2020-12-23 16:55:56,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:56,246 INFO L225 Difference]: With dead ends: 113 [2020-12-23 16:55:56,246 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 16:55:56,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=299, Invalid=1183, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:55:56,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 16:55:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-12-23 16:55:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 16:55:56,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2020-12-23 16:55:56,248 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 97 [2020-12-23 16:55:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:56,248 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2020-12-23 16:55:56,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:55:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2020-12-23 16:55:56,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 16:55:56,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:56,249 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:56,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 16:55:56,450 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:55:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:56,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1742143314, now seen corresponding path program 11 times [2020-12-23 16:55:56,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:56,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745683820] [2020-12-23 16:55:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 38 proven. 153 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2020-12-23 16:55:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745683820] [2020-12-23 16:55:56,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886243776] [2020-12-23 16:55:56,987 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:00,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:56:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 129 conjunts are in the unsatisfiable core [2020-12-23 16:56:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:00,571 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_45|]} [2020-12-23 16:56:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:00,581 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:00,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:00,597 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:00,603 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:00,605 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:00,619 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:00,621 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:00,622 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:56:01,152 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:56:01,154 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,165 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:01,166 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,167 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:56:01,415 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:01,418 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:01,434 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,434 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:56:01,617 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:01,619 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,642 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:01,644 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,645 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:56:01,833 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:01,835 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,850 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:01,852 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:01,853 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:56:02,046 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:02,048 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,062 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:02,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:56:02,269 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:02,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,286 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:02,288 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,288 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:24 [2020-12-23 16:56:02,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-23 16:56:02,498 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,512 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:02,515 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,515 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2020-12-23 16:56:02,731 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:02,731 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 19 treesize of output 19 [2020-12-23 16:56:02,733 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:56:02,748 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:02,749 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:02,750 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:19 [2020-12-23 16:56:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 45 proven. 147 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:56:03,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:03,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26] total 44 [2020-12-23 16:56:03,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259255141] [2020-12-23 16:56:03,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 16:56:03,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 16:56:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1784, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 16:56:03,101 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 44 states. [2020-12-23 16:56:05,843 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 16:56:06,078 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2020-12-23 16:56:11,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:11,650 INFO L93 Difference]: Finished difference Result 163 states and 166 transitions. [2020-12-23 16:56:11,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 16:56:11,651 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2020-12-23 16:56:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:11,652 INFO L225 Difference]: With dead ends: 163 [2020-12-23 16:56:11,653 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 16:56:11,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=871, Invalid=8249, Unknown=0, NotChecked=0, Total=9120 [2020-12-23 16:56:11,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 16:56:11,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 116. [2020-12-23 16:56:11,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 16:56:11,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2020-12-23 16:56:11,656 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 98 [2020-12-23 16:56:11,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:11,656 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2020-12-23 16:56:11,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 16:56:11,656 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2020-12-23 16:56:11,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-12-23 16:56:11,657 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:11,657 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:11,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:11,864 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:11,865 INFO L82 PathProgramCache]: Analyzing trace with hash 676347391, now seen corresponding path program 7 times [2020-12-23 16:56:11,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:11,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717851374] [2020-12-23 16:56:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:12,375 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 106 proven. 93 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717851374] [2020-12-23 16:56:12,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101746492] [2020-12-23 16:56:12,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:12,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 16:56:12,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:12,534 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:12,535 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:56:12,539 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:12,567 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:56:12,569 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:12,570 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:56:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 120 proven. 79 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:13,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:13,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2020-12-23 16:56:13,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891260657] [2020-12-23 16:56:13,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:56:13,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:56:13,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:56:13,612 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand 39 states. [2020-12-23 16:56:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:14,978 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2020-12-23 16:56:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:56:14,979 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 103 [2020-12-23 16:56:14,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:14,981 INFO L225 Difference]: With dead ends: 202 [2020-12-23 16:56:14,981 INFO L226 Difference]: Without dead ends: 201 [2020-12-23 16:56:14,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=595, Invalid=2485, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:56:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-12-23 16:56:14,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 191. [2020-12-23 16:56:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 16:56:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 196 transitions. [2020-12-23 16:56:14,985 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 196 transitions. Word has length 103 [2020-12-23 16:56:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:14,986 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 196 transitions. [2020-12-23 16:56:14,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:56:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 196 transitions. [2020-12-23 16:56:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 16:56:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:14,987 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:15,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:15,201 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:15,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:15,202 INFO L82 PathProgramCache]: Analyzing trace with hash -508108059, now seen corresponding path program 1 times [2020-12-23 16:56:15,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:15,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978190125] [2020-12-23 16:56:15,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:56:15,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978190125] [2020-12-23 16:56:15,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139534840] [2020-12-23 16:56:15,715 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:15,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 16:56:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:15,858 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_40|], 1=[|v_#valid_46|]} [2020-12-23 16:56:15,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:15,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:15,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:15,877 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:15,883 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:15,885 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:15,896 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:15,898 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:15,898 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-23 16:56:17,110 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:56:17,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:17,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2020-12-23 16:56:17,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641874792] [2020-12-23 16:56:17,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:56:17,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:17,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:56:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:56:17,112 INFO L87 Difference]: Start difference. First operand 191 states and 196 transitions. Second operand 39 states. [2020-12-23 16:56:19,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:19,130 INFO L93 Difference]: Finished difference Result 197 states and 201 transitions. [2020-12-23 16:56:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 16:56:19,132 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 104 [2020-12-23 16:56:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:19,133 INFO L225 Difference]: With dead ends: 197 [2020-12-23 16:56:19,133 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 16:56:19,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=541, Invalid=2651, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:56:19,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 16:56:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2020-12-23 16:56:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-12-23 16:56:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 199 transitions. [2020-12-23 16:56:19,141 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 199 transitions. Word has length 104 [2020-12-23 16:56:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 199 transitions. [2020-12-23 16:56:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:56:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 199 transitions. [2020-12-23 16:56:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 16:56:19,143 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:19,143 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:19,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 16:56:19,357 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:19,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:19,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1334428422, now seen corresponding path program 3 times [2020-12-23 16:56:19,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:19,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147212689] [2020-12-23 16:56:19,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 14 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:56:21,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147212689] [2020-12-23 16:56:21,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859296790] [2020-12-23 16:56:21,811 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:22,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-23 16:56:22,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:22,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 182 conjunts are in the unsatisfiable core [2020-12-23 16:56:22,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:22,720 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:22,723 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:22,735 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:22,739 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:22,739 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 16:56:23,042 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:56:23,046 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,063 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:23,065 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:23,066 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-23 16:56:23,346 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:23,348 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,364 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:23,366 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,366 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:23,585 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:23,587 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:23,604 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,604 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:23,829 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:23,831 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,847 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:23,850 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:23,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:24,079 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:24,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:24,099 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:24,330 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:24,333 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,347 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:24,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,360 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:24,591 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2020-12-23 16:56:24,592 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,607 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:24,609 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,609 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:18 [2020-12-23 16:56:24,816 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-12-23 16:56:24,817 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:24,821 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:24,822 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-23 16:56:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 14 proven. 261 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:56:24,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:24,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 33] total 55 [2020-12-23 16:56:24,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180781054] [2020-12-23 16:56:24,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 16:56:24,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:24,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 16:56:24,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2814, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 16:56:24,885 INFO L87 Difference]: Start difference. First operand 194 states and 199 transitions. Second operand 55 states. [2020-12-23 16:56:28,683 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-12-23 16:56:29,686 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 16:56:30,206 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-12-23 16:56:30,705 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-12-23 16:56:31,211 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-12-23 16:56:32,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:32,017 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-12-23 16:56:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:56:32,018 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 106 [2020-12-23 16:56:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:32,020 INFO L225 Difference]: With dead ends: 198 [2020-12-23 16:56:32,020 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 16:56:32,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=369, Invalid=5793, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 16:56:32,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 16:56:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-12-23 16:56:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 16:56:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-12-23 16:56:32,023 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 106 [2020-12-23 16:56:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:32,024 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-12-23 16:56:32,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 16:56:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-12-23 16:56:32,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-23 16:56:32,025 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:32,025 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:32,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:32,238 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:32,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:32,239 INFO L82 PathProgramCache]: Analyzing trace with hash -465181630, now seen corresponding path program 8 times [2020-12-23 16:56:32,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:32,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270273244] [2020-12-23 16:56:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:32,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270273244] [2020-12-23 16:56:32,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981344318] [2020-12-23 16:56:32,932 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:33,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:56:33,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:33,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 16:56:33,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:33,102 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_41|], 1=[|v_#valid_48|]} [2020-12-23 16:56:33,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:33,109 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:33,111 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,127 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,134 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:33,137 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,153 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:33,155 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:33,156 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:21, output treesize:9 [2020-12-23 16:56:34,659 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:34,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:34,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2020-12-23 16:56:34,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595764872] [2020-12-23 16:56:34,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 16:56:34,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:34,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 16:56:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1498, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 16:56:34,667 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 41 states. [2020-12-23 16:56:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:37,608 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2020-12-23 16:56:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:56:37,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 107 [2020-12-23 16:56:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:37,611 INFO L225 Difference]: With dead ends: 128 [2020-12-23 16:56:37,611 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 16:56:37,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=576, Invalid=2964, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:56:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 16:56:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 124. [2020-12-23 16:56:37,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 16:56:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2020-12-23 16:56:37,614 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 107 [2020-12-23 16:56:37,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:37,614 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2020-12-23 16:56:37,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 16:56:37,614 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2020-12-23 16:56:37,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 16:56:37,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:37,615 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:37,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 16:56:37,820 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:37,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:37,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1594413539, now seen corresponding path program 4 times [2020-12-23 16:56:37,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:37,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905247580] [2020-12-23 16:56:37,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:37,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 45 proven. 165 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905247580] [2020-12-23 16:56:38,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266344885] [2020-12-23 16:56:38,525 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:39,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:56:39,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:39,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 16:56:39,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:39,417 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:39,417 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:56:39,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:39,468 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:56:39,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:39,471 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:15 [2020-12-23 16:56:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 66 proven. 144 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:40,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:40,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 38 [2020-12-23 16:56:40,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148561312] [2020-12-23 16:56:40,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:56:40,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:40,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:56:40,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1341, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:56:40,979 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand 39 states. [2020-12-23 16:56:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:43,940 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-12-23 16:56:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:56:43,941 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 110 [2020-12-23 16:56:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:43,942 INFO L225 Difference]: With dead ends: 126 [2020-12-23 16:56:43,942 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 16:56:43,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=441, Invalid=2315, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 16:56:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 16:56:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-12-23 16:56:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 16:56:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2020-12-23 16:56:43,944 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 110 [2020-12-23 16:56:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:43,944 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2020-12-23 16:56:43,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:56:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2020-12-23 16:56:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-23 16:56:43,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:43,945 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:44,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:44,159 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-23 16:56:44,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:44,159 INFO L82 PathProgramCache]: Analyzing trace with hash -899706093, now seen corresponding path program 12 times [2020-12-23 16:56:44,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:44,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471935399] [2020-12-23 16:56:44,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:44,899 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 44 proven. 210 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-23 16:56:44,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471935399] [2020-12-23 16:56:44,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754212686] [2020-12-23 16:56:44,900 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:46,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 16:56:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:46,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 186 conjunts are in the unsatisfiable core [2020-12-23 16:56:46,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:46,515 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:46,517 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:46,530 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:46,531 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:46,532 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-12-23 16:56:47,470 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:56:47,472 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:47,491 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:47,492 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:47,493 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:27 [2020-12-23 16:56:47,913 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:47,914 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:47,935 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:47,938 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:47,939 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:48,238 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:48,240 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:48,262 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:48,264 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:48,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:48,606 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:48,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:48,636 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:48,639 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:48,639 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:48,968 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:48,969 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:49,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:49,003 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:49,003 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:49,333 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:49,335 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:49,359 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:49,361 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:49,362 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:49,711 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:49,713 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:49,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:49,738 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:49,739 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:50,091 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2020-12-23 16:56:50,093 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,115 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,118 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:50,118 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:26 [2020-12-23 16:56:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:56:50,471 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,472 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 17 treesize of output 10 [2020-12-23 16:56:50,474 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,484 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:50,486 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:50,486 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2020-12-23 16:56:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 24 proven. 231 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-23 16:56:50,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:50,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 30] total 49 [2020-12-23 16:56:50,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316332644] [2020-12-23 16:56:50,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 16:56:50,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:50,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 16:56:50,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2247, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 16:56:50,678 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand 49 states.