/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_cstrcat-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:52:01,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:52:01,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:52:01,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:52:01,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:52:01,729 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:52:01,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:52:01,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:52:01,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:52:01,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:52:01,756 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:52:01,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:52:01,759 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:52:01,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:52:01,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:52:01,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:52:01,781 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:52:01,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:52:01,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:52:01,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:52:01,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:52:01,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:52:01,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:52:01,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:52:01,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:52:01,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 16:52:01,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 16:52:01,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 16:52:01,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 16:52:01,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 16:52:01,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 16:52:01,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 16:52:01,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 16:52:01,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:52:01,843 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:52:01,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:52:01,850 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 16:52:01,905 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:52:01,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:52:01,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:52:01,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:52:01,912 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:52:01,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:52:01,912 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:52:01,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:52:01,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:52:01,913 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:52:01,915 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:52:01,915 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:52:01,916 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:52:01,916 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:52:01,916 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:52:01,917 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:52:01,917 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:52:01,917 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:52:01,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:52:01,918 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:52:01,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:52:01,919 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:52:01,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:52:01,919 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:52:01,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:52:02,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:52:02,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:52:02,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:52:02,442 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:52:02,443 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:52:02,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2020-12-23 16:52:02,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/421f49c0a/568b481f6dc24baa80b6764dbf982c50/FLAGc685c0831 [2020-12-23 16:52:03,382 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:52:03,383 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcat-alloca-2.i [2020-12-23 16:52:03,418 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/421f49c0a/568b481f6dc24baa80b6764dbf982c50/FLAGc685c0831 [2020-12-23 16:52:03,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/421f49c0a/568b481f6dc24baa80b6764dbf982c50 [2020-12-23 16:52:03,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:52:03,636 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:52:03,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:52:03,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:52:03,648 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:52:03,649 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:52:03" (1/1) ... [2020-12-23 16:52:03,651 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2199b5a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:03, skipping insertion in model container [2020-12-23 16:52:03,651 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:52:03" (1/1) ... [2020-12-23 16:52:03,662 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:52:03,733 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: address: IdentifierExpression[#t~post4,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: lhs: VariableLHS[~length3~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],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[~length1~0,],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[~length3~0,],IntegerLiteral[1]]]]] [2020-12-23 16:52:04,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:52:04,083 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: IdentifierExpression[#t~post4,] left hand side expression in assignment: lhs: VariableLHS[~length1~0,] left hand side expression in assignment: lhs: VariableLHS[~length2~0,] left hand side expression in assignment: lhs: VariableLHS[~length3~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString1~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString1~0,],offset],IdentifierExpression[~i~0,]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~nondetString2~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~nondetString2~0,],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[~length1~0,],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[~length3~0,],IntegerLiteral[1]]]]] [2020-12-23 16:52:04,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:52:04,210 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:52:04,211 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04 WrapperNode [2020-12-23 16:52:04,211 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:52:04,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:52:04,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:52:04,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:52:04,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,251 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,283 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:52:04,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:52:04,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:52:04,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:52:04,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (1/1) ... [2020-12-23 16:52:04,356 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:52:04,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:52:04,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:52:04,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:52:04,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (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 16:52:04,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:52:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:52:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:52:04,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:52:04,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:52:04,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:52:04,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:52:04,989 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-23 16:52:04,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:52:04 BoogieIcfgContainer [2020-12-23 16:52:04,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:52:04,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:52:04,993 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:52:04,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:52:04,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:52:03" (1/3) ... [2020-12-23 16:52:04,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4010250b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:52:04, skipping insertion in model container [2020-12-23 16:52:04,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:52:04" (2/3) ... [2020-12-23 16:52:04,999 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4010250b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:52:04, skipping insertion in model container [2020-12-23 16:52:04,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:52:04" (3/3) ... [2020-12-23 16:52:05,000 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcat-alloca-2.i [2020-12-23 16:52:05,009 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:52:05,015 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2020-12-23 16:52:05,039 INFO L253 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2020-12-23 16:52:05,064 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:52:05,064 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:52:05,065 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:52:05,065 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:52:05,065 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:52:05,065 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:52:05,065 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:52:05,065 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:52:05,102 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-12-23 16:52:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:52:05,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:05,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:05,120 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:05,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:05,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1805031099, now seen corresponding path program 1 times [2020-12-23 16:52:05,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:05,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837139138] [2020-12-23 16:52:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:05,446 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 16:52:05,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837139138] [2020-12-23 16:52:05,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:05,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:52:05,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450733435] [2020-12-23 16:52:05,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:52:05,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:05,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:52:05,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:52:05,478 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-12-23 16:52:05,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:05,633 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2020-12-23 16:52:05,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:05,635 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:52:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:05,647 INFO L225 Difference]: With dead ends: 127 [2020-12-23 16:52:05,647 INFO L226 Difference]: Without dead ends: 121 [2020-12-23 16:52:05,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 16:52:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-23 16:52:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 46. [2020-12-23 16:52:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:52:05,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-23 16:52:05,696 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 7 [2020-12-23 16:52:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:05,697 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-23 16:52:05,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:52:05,697 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-23 16:52:05,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:52:05,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:05,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:05,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:52:05,699 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1805033021, now seen corresponding path program 1 times [2020-12-23 16:52:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159536763] [2020-12-23 16:52:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:05,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:05,732 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 16:52:05,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159536763] [2020-12-23 16:52:05,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:05,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:52:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408042001] [2020-12-23 16:52:05,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:52:05,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:05,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:52:05,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:52:05,740 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 3 states. [2020-12-23 16:52:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:05,791 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-12-23 16:52:05,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:52:05,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:52:05,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:05,797 INFO L225 Difference]: With dead ends: 47 [2020-12-23 16:52:05,797 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:52:05,798 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 16:52:05,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:52:05,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-12-23 16:52:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 16:52:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-12-23 16:52:05,818 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 7 [2020-12-23 16:52:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:05,818 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-12-23 16:52:05,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:52:05,820 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-12-23 16:52:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:52:05,820 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:05,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:05,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:52:05,821 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:05,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:05,822 INFO L82 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2020-12-23 16:52:05,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:05,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121903349] [2020-12-23 16:52:05,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:05,933 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 16:52:05,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121903349] [2020-12-23 16:52:05,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:05,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:52:05,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874143141] [2020-12-23 16:52:05,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:05,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:05,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:05,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:05,940 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 4 states. [2020-12-23 16:52:05,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:05,987 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2020-12-23 16:52:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:05,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:52:05,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:05,989 INFO L225 Difference]: With dead ends: 78 [2020-12-23 16:52:05,989 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 16:52:05,992 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 16:52:05,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 16:52:06,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 47. [2020-12-23 16:52:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:52:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 16:52:06,003 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2020-12-23 16:52:06,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,003 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 16:52:06,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:06,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 16:52:06,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:52:06,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 16:52:06,008 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,009 INFO L82 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2020-12-23 16:52:06,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003688535] [2020-12-23 16:52:06,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,115 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 16:52:06,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003688535] [2020-12-23 16:52:06,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:52:06,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210777282] [2020-12-23 16:52:06,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:52:06,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:52:06,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:52:06,120 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-12-23 16:52:06,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,233 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2020-12-23 16:52:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:06,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 16:52:06,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,237 INFO L225 Difference]: With dead ends: 84 [2020-12-23 16:52:06,238 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 16:52:06,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 16:52:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 16:52:06,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 47. [2020-12-23 16:52:06,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:52:06,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-12-23 16:52:06,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 8 [2020-12-23 16:52:06,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,251 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-12-23 16:52:06,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:52:06,251 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-12-23 16:52:06,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:52:06,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 16:52:06,253 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,254 INFO L82 PathProgramCache]: Analyzing trace with hash 180494259, now seen corresponding path program 1 times [2020-12-23 16:52:06,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344958107] [2020-12-23 16:52:06,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,356 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 16:52:06,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344958107] [2020-12-23 16:52:06,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:52:06,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420973002] [2020-12-23 16:52:06,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:52:06,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:52:06,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:52:06,362 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 3 states. [2020-12-23 16:52:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,408 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-12-23 16:52:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:52:06,410 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-23 16:52:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,411 INFO L225 Difference]: With dead ends: 45 [2020-12-23 16:52:06,411 INFO L226 Difference]: Without dead ends: 45 [2020-12-23 16:52:06,412 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 16:52:06,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-23 16:52:06,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-23 16:52:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 16:52:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2020-12-23 16:52:06,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 8 [2020-12-23 16:52:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,421 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2020-12-23 16:52:06,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:52:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2020-12-23 16:52:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 16:52:06,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:52:06,425 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,426 INFO L82 PathProgramCache]: Analyzing trace with hash 180494260, now seen corresponding path program 1 times [2020-12-23 16:52:06,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136192115] [2020-12-23 16:52:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,499 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 16:52:06,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136192115] [2020-12-23 16:52:06,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:52:06,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189206112] [2020-12-23 16:52:06,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:06,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:06,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:06,502 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand 4 states. [2020-12-23 16:52:06,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,592 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2020-12-23 16:52:06,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:06,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-23 16:52:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,593 INFO L225 Difference]: With dead ends: 79 [2020-12-23 16:52:06,594 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 16:52:06,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:52:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 16:52:06,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2020-12-23 16:52:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 16:52:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2020-12-23 16:52:06,600 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 8 [2020-12-23 16:52:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,600 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2020-12-23 16:52:06,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2020-12-23 16:52:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:52:06,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:52:06,602 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,603 INFO L82 PathProgramCache]: Analyzing trace with hash 690580011, now seen corresponding path program 1 times [2020-12-23 16:52:06,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468188490] [2020-12-23 16:52:06,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,662 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 16:52:06,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468188490] [2020-12-23 16:52:06,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:52:06,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301750710] [2020-12-23 16:52:06,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:06,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:06,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:06,665 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand 4 states. [2020-12-23 16:52:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,700 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 16:52:06,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:06,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 16:52:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,702 INFO L225 Difference]: With dead ends: 46 [2020-12-23 16:52:06,702 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 16:52:06,702 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 16:52:06,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 16:52:06,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-23 16:52:06,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-23 16:52:06,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2020-12-23 16:52:06,707 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2020-12-23 16:52:06,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,707 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2020-12-23 16:52:06,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:06,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2020-12-23 16:52:06,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:52:06,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,708 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:52:06,709 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 690580063, now seen corresponding path program 1 times [2020-12-23 16:52:06,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023213193] [2020-12-23 16:52:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,755 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 16:52:06,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023213193] [2020-12-23 16:52:06,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:52:06,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153245980] [2020-12-23 16:52:06,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:06,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:06,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:06,758 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 4 states. [2020-12-23 16:52:06,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,777 INFO L93 Difference]: Finished difference Result 80 states and 92 transitions. [2020-12-23 16:52:06,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:06,777 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-23 16:52:06,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,778 INFO L225 Difference]: With dead ends: 80 [2020-12-23 16:52:06,779 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 16:52:06,779 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 16:52:06,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 16:52:06,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-12-23 16:52:06,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:52:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2020-12-23 16:52:06,788 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 10 [2020-12-23 16:52:06,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,789 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2020-12-23 16:52:06,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2020-12-23 16:52:06,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:52:06,790 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 16:52:06,791 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,791 INFO L82 PathProgramCache]: Analyzing trace with hash 747838365, now seen corresponding path program 1 times [2020-12-23 16:52:06,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193988510] [2020-12-23 16:52:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,836 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 16:52:06,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193988510] [2020-12-23 16:52:06,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:52:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4550841] [2020-12-23 16:52:06,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:52:06,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:52:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:52:06,838 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand 3 states. [2020-12-23 16:52:06,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:06,865 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-23 16:52:06,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:52:06,865 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 16:52:06,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:06,866 INFO L225 Difference]: With dead ends: 55 [2020-12-23 16:52:06,867 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 16:52:06,867 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 16:52:06,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 16:52:06,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-23 16:52:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:52:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2020-12-23 16:52:06,871 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 10 [2020-12-23 16:52:06,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:06,872 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2020-12-23 16:52:06,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:52:06,872 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2020-12-23 16:52:06,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:52:06,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:06,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:06,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 16:52:06,873 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:06,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:06,874 INFO L82 PathProgramCache]: Analyzing trace with hash 747838366, now seen corresponding path program 1 times [2020-12-23 16:52:06,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:06,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982225873] [2020-12-23 16:52:06,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:06,931 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 16:52:06,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982225873] [2020-12-23 16:52:06,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:06,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:52:06,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994528732] [2020-12-23 16:52:06,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:52:06,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:06,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:52:06,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:52:06,936 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand 6 states. [2020-12-23 16:52:07,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:07,041 INFO L93 Difference]: Finished difference Result 107 states and 121 transitions. [2020-12-23 16:52:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:52:07,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:52:07,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:07,051 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:52:07,052 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:52:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:52:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:52:07,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 56. [2020-12-23 16:52:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-23 16:52:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-12-23 16:52:07,062 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 10 [2020-12-23 16:52:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:07,068 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-12-23 16:52:07,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:52:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-12-23 16:52:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 16:52:07,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:07,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:07,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 16:52:07,070 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1772121568, now seen corresponding path program 1 times [2020-12-23 16:52:07,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:07,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643279069] [2020-12-23 16:52:07,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:07,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:07,202 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 16:52:07,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643279069] [2020-12-23 16:52:07,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:07,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:52:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698144882] [2020-12-23 16:52:07,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:52:07,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:07,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:52:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:52:07,212 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 6 states. [2020-12-23 16:52:07,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:07,351 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-23 16:52:07,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:52:07,352 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 16:52:07,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:07,353 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:52:07,353 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:52:07,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:52:07,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2020-12-23 16:52:07,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-23 16:52:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 72 transitions. [2020-12-23 16:52:07,370 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 72 transitions. Word has length 10 [2020-12-23 16:52:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:07,370 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 72 transitions. [2020-12-23 16:52:07,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:52:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 72 transitions. [2020-12-23 16:52:07,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:52:07,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:07,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:07,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:52:07,374 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:07,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:07,374 INFO L82 PathProgramCache]: Analyzing trace with hash -66856135, now seen corresponding path program 1 times [2020-12-23 16:52:07,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:07,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562335917] [2020-12-23 16:52:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:07,484 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 16:52:07,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562335917] [2020-12-23 16:52:07,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:07,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:52:07,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345284457] [2020-12-23 16:52:07,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:52:07,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:07,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:52:07,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:52:07,487 INFO L87 Difference]: Start difference. First operand 58 states and 72 transitions. Second operand 5 states. [2020-12-23 16:52:07,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:07,573 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2020-12-23 16:52:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:07,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 16:52:07,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:07,574 INFO L225 Difference]: With dead ends: 83 [2020-12-23 16:52:07,575 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 16:52:07,575 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 16:52:07,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 16:52:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-12-23 16:52:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:52:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-12-23 16:52:07,583 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 11 [2020-12-23 16:52:07,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:07,584 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-12-23 16:52:07,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:52:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-12-23 16:52:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:52:07,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:07,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:07,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:52:07,589 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1708151227, now seen corresponding path program 1 times [2020-12-23 16:52:07,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:07,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619838610] [2020-12-23 16:52:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:07,682 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 16:52:07,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619838610] [2020-12-23 16:52:07,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:07,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:52:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370495892] [2020-12-23 16:52:07,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:52:07,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:07,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:52:07,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:52:07,686 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 5 states. [2020-12-23 16:52:07,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:07,738 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-12-23 16:52:07,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:07,738 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 16:52:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:07,739 INFO L225 Difference]: With dead ends: 63 [2020-12-23 16:52:07,739 INFO L226 Difference]: Without dead ends: 63 [2020-12-23 16:52:07,739 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 16:52:07,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-23 16:52:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-12-23 16:52:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 16:52:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2020-12-23 16:52:07,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 11 [2020-12-23 16:52:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:07,745 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2020-12-23 16:52:07,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:52:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2020-12-23 16:52:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 16:52:07,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:07,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:07,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:52:07,748 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:07,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:07,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1736941833, now seen corresponding path program 1 times [2020-12-23 16:52:07,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:07,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970448617] [2020-12-23 16:52:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:07,820 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 16:52:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970448617] [2020-12-23 16:52:07,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246702236] [2020-12-23 16:52:07,822 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 16:52:07,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:07,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:52:07,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:07,974 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_18|], 1=[|v_#valid_26|]} [2020-12-23 16:52:07,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:07,999 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 16:52:08,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:08,017 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:08,030 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 16:52:08,039 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:08,053 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:08,057 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 16:52:08,057 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:52:08,140 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 16:52:08,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:08,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:52:08,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479099012] [2020-12-23 16:52:08,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:52:08,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:52:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:52:08,147 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand 6 states. [2020-12-23 16:52:08,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:08,310 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-12-23 16:52:08,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:08,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-23 16:52:08,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:08,312 INFO L225 Difference]: With dead ends: 90 [2020-12-23 16:52:08,312 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 16:52:08,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 16:52:08,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 16:52:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2020-12-23 16:52:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:52:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-23 16:52:08,330 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 12 [2020-12-23 16:52:08,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:08,330 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-23 16:52:08,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:52:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-23 16:52:08,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:52:08,331 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:08,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:08,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 16:52:08,545 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:08,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:08,546 INFO L82 PathProgramCache]: Analyzing trace with hash 175763932, now seen corresponding path program 1 times [2020-12-23 16:52:08,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:08,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822239061] [2020-12-23 16:52:08,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:08,585 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 16:52:08,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822239061] [2020-12-23 16:52:08,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:08,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:52:08,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800511995] [2020-12-23 16:52:08,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:08,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:08,592 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 4 states. [2020-12-23 16:52:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:08,633 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-12-23 16:52:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:08,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 16:52:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:08,634 INFO L225 Difference]: With dead ends: 51 [2020-12-23 16:52:08,635 INFO L226 Difference]: Without dead ends: 51 [2020-12-23 16:52:08,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:52:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-23 16:52:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-23 16:52:08,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 16:52:08,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-12-23 16:52:08,638 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 13 [2020-12-23 16:52:08,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:08,638 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-12-23 16:52:08,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:08,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-12-23 16:52:08,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:52:08,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:08,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:08,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:52:08,640 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:08,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash 175763933, now seen corresponding path program 1 times [2020-12-23 16:52:08,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:08,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331264109] [2020-12-23 16:52:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:08,710 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 16:52:08,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331264109] [2020-12-23 16:52:08,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:08,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:52:08,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539584416] [2020-12-23 16:52:08,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:52:08,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:52:08,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:52:08,713 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 6 states. [2020-12-23 16:52:08,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:08,797 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-12-23 16:52:08,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:08,797 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-23 16:52:08,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:08,798 INFO L225 Difference]: With dead ends: 55 [2020-12-23 16:52:08,798 INFO L226 Difference]: Without dead ends: 55 [2020-12-23 16:52:08,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:52:08,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-23 16:52:08,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-12-23 16:52:08,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:52:08,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-23 16:52:08,801 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 13 [2020-12-23 16:52:08,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:08,802 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-23 16:52:08,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:52:08,802 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-23 16:52:08,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 16:52:08,803 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:08,803 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:08,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 16:52:08,803 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1510420451, now seen corresponding path program 1 times [2020-12-23 16:52:08,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:08,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416996977] [2020-12-23 16:52:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:08,912 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 16:52:08,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416996977] [2020-12-23 16:52:08,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328083439] [2020-12-23 16:52:08,913 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 16:52:08,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:08,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 16:52:08,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:09,027 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:09,028 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 16:52:09,031 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:09,060 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:09,069 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:09,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:52:09,122 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 16:52:09,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:09,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 16:52:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321925748] [2020-12-23 16:52:09,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:52:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:09,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:52:09,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:52:09,124 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 8 states. [2020-12-23 16:52:09,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:09,285 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-12-23 16:52:09,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:52:09,285 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 16:52:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:09,286 INFO L225 Difference]: With dead ends: 73 [2020-12-23 16:52:09,286 INFO L226 Difference]: Without dead ends: 73 [2020-12-23 16:52:09,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:52:09,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-23 16:52:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2020-12-23 16:52:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 16:52:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-23 16:52:09,290 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 14 [2020-12-23 16:52:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:09,290 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-23 16:52:09,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:52:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-23 16:52:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:52:09,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:09,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:09,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 16:52:09,506 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:09,509 INFO L82 PathProgramCache]: Analyzing trace with hash 618210419, now seen corresponding path program 1 times [2020-12-23 16:52:09,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:09,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533712477] [2020-12-23 16:52:09,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:09,548 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 16:52:09,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533712477] [2020-12-23 16:52:09,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:09,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:52:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813188238] [2020-12-23 16:52:09,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:52:09,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:52:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:52:09,551 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-12-23 16:52:09,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:09,609 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2020-12-23 16:52:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:52:09,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-23 16:52:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:09,611 INFO L225 Difference]: With dead ends: 48 [2020-12-23 16:52:09,611 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 16:52:09,611 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 16:52:09,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 16:52:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-12-23 16:52:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-23 16:52:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-23 16:52:09,613 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 16 [2020-12-23 16:52:09,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:09,614 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-23 16:52:09,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:52:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-23 16:52:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:52:09,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:09,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:09,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 16:52:09,615 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:09,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:09,628 INFO L82 PathProgramCache]: Analyzing trace with hash 618210420, now seen corresponding path program 1 times [2020-12-23 16:52:09,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:09,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904259027] [2020-12-23 16:52:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:09,696 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 16:52:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904259027] [2020-12-23 16:52:09,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:09,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:52:09,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401449636] [2020-12-23 16:52:09,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:52:09,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:09,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:52:09,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:52:09,698 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 7 states. [2020-12-23 16:52:09,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:09,806 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-12-23 16:52:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:52:09,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-12-23 16:52:09,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:09,807 INFO L225 Difference]: With dead ends: 54 [2020-12-23 16:52:09,807 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 16:52:09,808 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 16:52:09,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 16:52:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 16:52:09,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 16:52:09,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2020-12-23 16:52:09,811 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 16 [2020-12-23 16:52:09,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:09,811 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2020-12-23 16:52:09,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:52:09,812 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2020-12-23 16:52:09,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 16:52:09,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:09,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:09,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 16:52:09,813 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:09,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:09,813 INFO L82 PathProgramCache]: Analyzing trace with hash 618212108, now seen corresponding path program 1 times [2020-12-23 16:52:09,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:09,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868408953] [2020-12-23 16:52:09,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:09,875 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 16:52:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868408953] [2020-12-23 16:52:09,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712320416] [2020-12-23 16:52:09,876 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 16:52:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 16:52:09,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:09,981 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:09,982 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 16:52:09,984 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:10,011 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-23 16:52:10,014 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:10,015 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:16, output treesize:9 [2020-12-23 16:52:10,077 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 16:52:10,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:10,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2020-12-23 16:52:10,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956026942] [2020-12-23 16:52:10,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:52:10,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:10,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:52:10,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:10,080 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand 9 states. [2020-12-23 16:52:10,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:10,179 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-12-23 16:52:10,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:52:10,180 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 16:52:10,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:10,181 INFO L225 Difference]: With dead ends: 67 [2020-12-23 16:52:10,181 INFO L226 Difference]: Without dead ends: 67 [2020-12-23 16:52:10,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:52:10,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-23 16:52:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2020-12-23 16:52:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 16:52:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2020-12-23 16:52:10,184 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 16 [2020-12-23 16:52:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2020-12-23 16:52:10,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:52:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2020-12-23 16:52:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:52:10,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:10,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:10,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:10,400 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:10,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653866, now seen corresponding path program 1 times [2020-12-23 16:52:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:10,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090108228] [2020-12-23 16:52:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:10,428 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 16:52:10,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090108228] [2020-12-23 16:52:10,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:10,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:52:10,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073504923] [2020-12-23 16:52:10,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:10,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:10,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:10,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:10,431 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand 4 states. [2020-12-23 16:52:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:10,474 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2020-12-23 16:52:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:10,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-12-23 16:52:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:10,475 INFO L225 Difference]: With dead ends: 52 [2020-12-23 16:52:10,475 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 16:52:10,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 16:52:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 16:52:10,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-23 16:52:10,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-23 16:52:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-23 16:52:10,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 17 [2020-12-23 16:52:10,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:10,479 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-23 16:52:10,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:10,479 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-23 16:52:10,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:52:10,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:10,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:10,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 16:52:10,480 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:10,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:10,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1984653867, now seen corresponding path program 1 times [2020-12-23 16:52:10,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:10,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943962633] [2020-12-23 16:52:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:10,540 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 16:52:10,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943962633] [2020-12-23 16:52:10,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:10,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:52:10,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726408306] [2020-12-23 16:52:10,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:52:10,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:10,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:52:10,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:52:10,542 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 6 states. [2020-12-23 16:52:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:10,644 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2020-12-23 16:52:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:52:10,644 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-23 16:52:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:10,645 INFO L225 Difference]: With dead ends: 56 [2020-12-23 16:52:10,645 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 16:52:10,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 16:52:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 16:52:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 16:52:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2020-12-23 16:52:10,648 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 17 [2020-12-23 16:52:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:10,648 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2020-12-23 16:52:10,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:52:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2020-12-23 16:52:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:52:10,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:10,649 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:10,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 16:52:10,650 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash 337162109, now seen corresponding path program 2 times [2020-12-23 16:52:10,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:10,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615369874] [2020-12-23 16:52:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:10,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:52:10,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615369874] [2020-12-23 16:52:10,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:10,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-23 16:52:10,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711348969] [2020-12-23 16:52:10,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:52:10,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:10,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:52:10,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:52:10,752 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand 7 states. [2020-12-23 16:52:10,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:10,866 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2020-12-23 16:52:10,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 16:52:10,867 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-23 16:52:10,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:10,868 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:52:10,868 INFO L226 Difference]: Without dead ends: 77 [2020-12-23 16:52:10,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:52:10,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-23 16:52:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64. [2020-12-23 16:52:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 16:52:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-12-23 16:52:10,871 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 19 [2020-12-23 16:52:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:10,871 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-12-23 16:52:10,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:52:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2020-12-23 16:52:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:52:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:10,872 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-23 16:52:10,873 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:10,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:10,873 INFO L82 PathProgramCache]: Analyzing trace with hash -942701569, now seen corresponding path program 1 times [2020-12-23 16:52:10,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:10,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654271853] [2020-12-23 16:52:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:52:10,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654271853] [2020-12-23 16:52:10,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:10,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:52:10,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375002572] [2020-12-23 16:52:10,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:52:10,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:52:10,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:10,995 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand 9 states. [2020-12-23 16:52:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:11,248 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2020-12-23 16:52:11,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:52:11,249 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-23 16:52:11,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:11,249 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:52:11,249 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:52:11,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:52:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:52:11,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-12-23 16:52:11,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-23 16:52:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-12-23 16:52:11,253 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 19 [2020-12-23 16:52:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:11,253 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-12-23 16:52:11,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:52:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-12-23 16:52:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 16:52:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:11,254 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:11,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 16:52:11,254 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1963769923, now seen corresponding path program 1 times [2020-12-23 16:52:11,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:11,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612405349] [2020-12-23 16:52:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:52:11,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612405349] [2020-12-23 16:52:11,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:11,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:52:11,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551326288] [2020-12-23 16:52:11,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:52:11,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:52:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:11,464 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 9 states. [2020-12-23 16:52:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:11,616 INFO L93 Difference]: Finished difference Result 82 states and 94 transitions. [2020-12-23 16:52:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:52:11,617 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 19 [2020-12-23 16:52:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:11,617 INFO L225 Difference]: With dead ends: 82 [2020-12-23 16:52:11,618 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 16:52:11,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:52:11,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 16:52:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 61. [2020-12-23 16:52:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 16:52:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2020-12-23 16:52:11,621 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 19 [2020-12-23 16:52:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:11,622 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2020-12-23 16:52:11,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:52:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2020-12-23 16:52:11,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:52:11,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:11,623 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:11,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 16:52:11,623 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:11,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 303592444, now seen corresponding path program 1 times [2020-12-23 16:52:11,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:11,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435762849] [2020-12-23 16:52:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:11,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:11,757 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 16:52:11,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435762849] [2020-12-23 16:52:11,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:11,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:52:11,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874309753] [2020-12-23 16:52:11,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:52:11,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:11,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:52:11,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:52:11,760 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand 8 states. [2020-12-23 16:52:11,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:11,917 INFO L93 Difference]: Finished difference Result 100 states and 116 transitions. [2020-12-23 16:52:11,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 16:52:11,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-12-23 16:52:11,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:11,918 INFO L225 Difference]: With dead ends: 100 [2020-12-23 16:52:11,918 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 16:52:11,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-12-23 16:52:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 16:52:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-12-23 16:52:11,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 16:52:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2020-12-23 16:52:11,922 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 20 [2020-12-23 16:52:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:11,923 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2020-12-23 16:52:11,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:52:11,923 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2020-12-23 16:52:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:52:11,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:11,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:11,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 16:52:11,924 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1690552262, now seen corresponding path program 1 times [2020-12-23 16:52:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:11,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865018281] [2020-12-23 16:52:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,078 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 16:52:12,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865018281] [2020-12-23 16:52:12,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:12,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-23 16:52:12,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815810087] [2020-12-23 16:52:12,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 16:52:12,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 16:52:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:52:12,080 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand 10 states. [2020-12-23 16:52:12,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:12,321 INFO L93 Difference]: Finished difference Result 122 states and 140 transitions. [2020-12-23 16:52:12,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:12,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-12-23 16:52:12,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:12,322 INFO L225 Difference]: With dead ends: 122 [2020-12-23 16:52:12,322 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 16:52:12,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:52:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 16:52:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 91. [2020-12-23 16:52:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 16:52:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-12-23 16:52:12,326 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 20 [2020-12-23 16:52:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:12,326 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-12-23 16:52:12,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 16:52:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-12-23 16:52:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:52:12,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:12,327 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:12,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 16:52:12,328 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:12,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1016067132, now seen corresponding path program 1 times [2020-12-23 16:52:12,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:12,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012531657] [2020-12-23 16:52:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,510 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 16:52:12,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012531657] [2020-12-23 16:52:12,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:12,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:52:12,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27244697] [2020-12-23 16:52:12,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:52:12,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:12,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:52:12,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:52:12,513 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 9 states. [2020-12-23 16:52:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:12,686 INFO L93 Difference]: Finished difference Result 135 states and 158 transitions. [2020-12-23 16:52:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:52:12,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-12-23 16:52:12,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:12,687 INFO L225 Difference]: With dead ends: 135 [2020-12-23 16:52:12,687 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 16:52:12,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:52:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 16:52:12,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 93. [2020-12-23 16:52:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:52:12,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 113 transitions. [2020-12-23 16:52:12,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 113 transitions. Word has length 20 [2020-12-23 16:52:12,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:12,692 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 113 transitions. [2020-12-23 16:52:12,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:52:12,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 113 transitions. [2020-12-23 16:52:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 16:52:12,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:12,693 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] [2020-12-23 16:52:12,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-23 16:52:12,693 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:12,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:12,693 INFO L82 PathProgramCache]: Analyzing trace with hash 821386545, now seen corresponding path program 1 times [2020-12-23 16:52:12,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:12,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063544459] [2020-12-23 16:52:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,745 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 16:52:12,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063544459] [2020-12-23 16:52:12,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:52:12,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:52:12,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778117432] [2020-12-23 16:52:12,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:12,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:12,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:12,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:52:12,747 INFO L87 Difference]: Start difference. First operand 93 states and 113 transitions. Second operand 4 states. [2020-12-23 16:52:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:12,769 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-12-23 16:52:12,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:12,769 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-12-23 16:52:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:12,770 INFO L225 Difference]: With dead ends: 92 [2020-12-23 16:52:12,770 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:52:12,771 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 16:52:12,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:52:12,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 16:52:12,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:52:12,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-12-23 16:52:12,773 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 21 [2020-12-23 16:52:12,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:12,773 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-12-23 16:52:12,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-12-23 16:52:12,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:52:12,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:12,774 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] [2020-12-23 16:52:12,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-23 16:52:12,774 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:12,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:12,775 INFO L82 PathProgramCache]: Analyzing trace with hash 293432666, now seen corresponding path program 1 times [2020-12-23 16:52:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:12,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661935492] [2020-12-23 16:52:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661935492] [2020-12-23 16:52:12,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815082006] [2020-12-23 16:52:12,901 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 16:52:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:12,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:52:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:13,042 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:13,042 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 16:52:13,044 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:13,067 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:13,086 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:13,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:52:13,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:13,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:13,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:52:13,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858152139] [2020-12-23 16:52:13,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:52:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:13,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:52:13,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:52:13,241 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 16 states. [2020-12-23 16:52:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:13,725 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2020-12-23 16:52:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:13,726 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-23 16:52:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:13,727 INFO L225 Difference]: With dead ends: 115 [2020-12-23 16:52:13,727 INFO L226 Difference]: Without dead ends: 115 [2020-12-23 16:52:13,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:52:13,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-23 16:52:13,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-12-23 16:52:13,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 16:52:13,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-12-23 16:52:13,732 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 23 [2020-12-23 16:52:13,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:13,732 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-12-23 16:52:13,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:52:13,732 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-12-23 16:52:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:52:13,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:13,733 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] [2020-12-23 16:52:13,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:13,947 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:13,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:13,948 INFO L82 PathProgramCache]: Analyzing trace with hash 506425757, now seen corresponding path program 1 times [2020-12-23 16:52:13,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:13,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721745329] [2020-12-23 16:52:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:13,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:14,071 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 16:52:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721745329] [2020-12-23 16:52:14,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119044922] [2020-12-23 16:52:14,072 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 16:52:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:52:14,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:14,207 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:14,208 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 16:52:14,210 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:14,237 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:14,248 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:14,249 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:52:14,400 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 16:52:14,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:14,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-12-23 16:52:14,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843523574] [2020-12-23 16:52:14,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:52:14,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:14,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:52:14,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:52:14,403 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 16 states. [2020-12-23 16:52:14,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:14,934 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2020-12-23 16:52:14,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:14,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-12-23 16:52:14,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:14,936 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:52:14,936 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 16:52:14,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:52:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 16:52:14,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 87. [2020-12-23 16:52:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:52:14,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2020-12-23 16:52:14,941 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 24 [2020-12-23 16:52:14,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:14,941 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2020-12-23 16:52:14,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:52:14,941 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2020-12-23 16:52:14,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 16:52:14,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:14,941 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] [2020-12-23 16:52:15,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-23 16:52:15,157 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:15,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1809160449, now seen corresponding path program 1 times [2020-12-23 16:52:15,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:15,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595003944] [2020-12-23 16:52:15,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:15,276 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 16:52:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595003944] [2020-12-23 16:52:15,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102518633] [2020-12-23 16:52:15,277 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 16:52:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:52:15,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:15,495 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 16:52:15,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:15,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-12-23 16:52:15,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070567110] [2020-12-23 16:52:15,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:52:15,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:52:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:52:15,497 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand 15 states. [2020-12-23 16:52:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:15,951 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-12-23 16:52:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:15,952 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2020-12-23 16:52:15,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:15,953 INFO L225 Difference]: With dead ends: 104 [2020-12-23 16:52:15,953 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 16:52:15,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:52:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 16:52:15,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-12-23 16:52:15,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:52:15,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-12-23 16:52:15,958 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 24 [2020-12-23 16:52:15,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:15,959 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-12-23 16:52:15,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:52:15,959 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-12-23 16:52:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:52:15,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:15,960 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] [2020-12-23 16:52:16,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:16,174 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:16,175 INFO L82 PathProgramCache]: Analyzing trace with hash -249399040, now seen corresponding path program 1 times [2020-12-23 16:52:16,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:16,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896650209] [2020-12-23 16:52:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896650209] [2020-12-23 16:52:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262153936] [2020-12-23 16:52:16,306 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 16:52:16,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:16,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:52:16,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:16,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:16,405 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:16,405 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:52:16,406 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:16,432 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:16,435 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 16:52:16,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:52:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:16,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:16,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2020-12-23 16:52:16,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920769557] [2020-12-23 16:52:16,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:52:16,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:52:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:52:16,593 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 16 states. [2020-12-23 16:52:17,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:17,163 INFO L93 Difference]: Finished difference Result 109 states and 121 transitions. [2020-12-23 16:52:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:17,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 25 [2020-12-23 16:52:17,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:17,165 INFO L225 Difference]: With dead ends: 109 [2020-12-23 16:52:17,165 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 16:52:17,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:52:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 16:52:17,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 92. [2020-12-23 16:52:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:52:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2020-12-23 16:52:17,170 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 25 [2020-12-23 16:52:17,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:17,170 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2020-12-23 16:52:17,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:52:17,170 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2020-12-23 16:52:17,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 16:52:17,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:17,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:17,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:17,382 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:17,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1394123375, now seen corresponding path program 2 times [2020-12-23 16:52:17,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:17,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851926394] [2020-12-23 16:52:17,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:17,825 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 16:52:17,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851926394] [2020-12-23 16:52:17,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98485708] [2020-12-23 16:52:17,826 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 16:52:17,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:52:17,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:17,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 16:52:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:18,044 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 16:52:18,045 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:18,052 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:18,055 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 16:52:18,055 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:52:18,215 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 16:52:18,217 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:18,219 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:18,219 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 16:52:18,220 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-23 16:52:18,225 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 16:52:18,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:18,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2020-12-23 16:52:18,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900846987] [2020-12-23 16:52:18,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:52:18,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:52:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:52:18,227 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand 21 states. [2020-12-23 16:52:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:19,262 INFO L93 Difference]: Finished difference Result 193 states and 210 transitions. [2020-12-23 16:52:19,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:52:19,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-23 16:52:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:19,264 INFO L225 Difference]: With dead ends: 193 [2020-12-23 16:52:19,264 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 16:52:19,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:52:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 16:52:19,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 108. [2020-12-23 16:52:19,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-23 16:52:19,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2020-12-23 16:52:19,269 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 26 [2020-12-23 16:52:19,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:19,269 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2020-12-23 16:52:19,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:52:19,270 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2020-12-23 16:52:19,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 16:52:19,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:19,270 INFO L422 BasicCegarLoop]: trace histogram [3, 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 16:52:19,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 16:52:19,484 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 446658823, now seen corresponding path program 2 times [2020-12-23 16:52:19,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:19,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598475318] [2020-12-23 16:52:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:19,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598475318] [2020-12-23 16:52:19,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60217384] [2020-12-23 16:52:19,849 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 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 16:52:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:52:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:19,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 16:52:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:20,136 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 16:52:20,137 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:20,150 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:20,152 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 16:52:20,153 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 16:52:20,231 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:20,232 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-23 16:52:20,235 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:20,272 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-23 16:52:20,275 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 16:52:20,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-23 16:52:20,820 WARN L197 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-23 16:52:20,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:21,076 INFO L348 Elim1Store]: treesize reduction 20, result has 80.4 percent of original size [2020-12-23 16:52:21,077 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 98 [2020-12-23 16:52:21,081 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:21,156 INFO L625 ElimStorePlain]: treesize reduction 46, result has 53.1 percent of original size [2020-12-23 16:52:21,159 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:21,162 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:21,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:21,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:21,170 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 16:52:21,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:52 [2020-12-23 16:52:21,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:21,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:21,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:21,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:21,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:21,256 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 16:52:22,172 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 1] term [2020-12-23 16:52:22,173 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:22,197 INFO L443 ElimStorePlain]: Different costs {7=[v_prenex_3], 15=[|#memory_int|]} [2020-12-23 16:52:22,204 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:52:22,206 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 14 [2020-12-23 16:52:22,208 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:22,270 INFO L625 ElimStorePlain]: treesize reduction 4, result has 94.1 percent of original size [2020-12-23 16:52:22,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:22,281 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:52:22,370 INFO L348 Elim1Store]: treesize reduction 12, result has 79.3 percent of original size [2020-12-23 16:52:22,371 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 62 [2020-12-23 16:52:22,375 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-23 16:52:22,376 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 16:52:22,378 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:52:22,379 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:52:22,383 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:22,448 INFO L625 ElimStorePlain]: treesize reduction 15, result has 68.8 percent of original size [2020-12-23 16:52:22,455 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:22,455 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:100, output treesize:3 [2020-12-23 16:52:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:22,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:22,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2020-12-23 16:52:22,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241978654] [2020-12-23 16:52:22,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:52:22,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:22,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:52:22,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=636, Unknown=1, NotChecked=0, Total=702 [2020-12-23 16:52:22,472 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand 27 states. [2020-12-23 16:52:23,315 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-12-23 16:52:23,497 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-12-23 16:52:26,127 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-23 16:52:28,852 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-12-23 16:52:29,068 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-12-23 16:52:31,862 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-12-23 16:52:32,072 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-12-23 16:52:32,388 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-12-23 16:52:36,735 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-12-23 16:52:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:40,035 INFO L93 Difference]: Finished difference Result 183 states and 205 transitions. [2020-12-23 16:52:40,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 16:52:40,035 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2020-12-23 16:52:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:40,036 INFO L225 Difference]: With dead ends: 183 [2020-12-23 16:52:40,036 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 16:52:40,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=329, Invalid=1920, Unknown=7, NotChecked=0, Total=2256 [2020-12-23 16:52:40,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 16:52:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 154. [2020-12-23 16:52:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 16:52:40,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2020-12-23 16:52:40,043 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 28 [2020-12-23 16:52:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:40,044 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2020-12-23 16:52:40,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:52:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2020-12-23 16:52:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 16:52:40,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:40,045 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:40,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:40,260 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:40,261 INFO L82 PathProgramCache]: Analyzing trace with hash -2025170382, now seen corresponding path program 3 times [2020-12-23 16:52:40,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:40,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222315324] [2020-12-23 16:52:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:40,418 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:40,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222315324] [2020-12-23 16:52:40,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615246341] [2020-12-23 16:52:40,419 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 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 16:52:40,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:52:40,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:52:40,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:40,549 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:40,550 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 16:52:40,551 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:40,586 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:40,591 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:40,591 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:52:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:40,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:40,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2020-12-23 16:52:40,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680705833] [2020-12-23 16:52:40,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:52:40,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:52:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:52:40,852 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand 20 states. [2020-12-23 16:52:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:41,778 INFO L93 Difference]: Finished difference Result 235 states and 266 transitions. [2020-12-23 16:52:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:52:41,778 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 30 [2020-12-23 16:52:41,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:41,783 INFO L225 Difference]: With dead ends: 235 [2020-12-23 16:52:41,783 INFO L226 Difference]: Without dead ends: 235 [2020-12-23 16:52:41,784 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:52:41,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-23 16:52:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-12-23 16:52:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 16:52:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2020-12-23 16:52:41,795 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 30 [2020-12-23 16:52:41,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:41,795 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2020-12-23 16:52:41,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:52:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2020-12-23 16:52:41,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-23 16:52:41,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:41,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:42,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:42,011 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:42,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1644175301, now seen corresponding path program 2 times [2020-12-23 16:52:42,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:42,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570989455] [2020-12-23 16:52:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570989455] [2020-12-23 16:52:42,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183947794] [2020-12-23 16:52:42,209 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 16:52:42,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:52:42,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:42,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:52:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-23 16:52:42,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:52:42,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2020-12-23 16:52:42,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061936517] [2020-12-23 16:52:42,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:52:42,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:42,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:52:42,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:52:42,375 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand 4 states. [2020-12-23 16:52:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:42,438 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2020-12-23 16:52:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:52:42,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-12-23 16:52:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:42,441 INFO L225 Difference]: With dead ends: 166 [2020-12-23 16:52:42,441 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 16:52:42,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:52:42,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 16:52:42,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-12-23 16:52:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 16:52:42,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2020-12-23 16:52:42,449 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 31 [2020-12-23 16:52:42,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:42,449 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2020-12-23 16:52:42,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:52:42,450 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2020-12-23 16:52:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:52:42,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:42,451 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] [2020-12-23 16:52:42,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:52:42,662 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:42,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1580697398, now seen corresponding path program 3 times [2020-12-23 16:52:42,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:42,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956247619] [2020-12-23 16:52:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:42,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956247619] [2020-12-23 16:52:42,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945154629] [2020-12-23 16:52:42,832 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 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 16:52:42,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:52:42,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:42,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 16:52:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:42,941 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_25|], 1=[|v_#valid_27|]} [2020-12-23 16:52:42,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:42,947 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 16:52:42,949 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:42,960 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:42,965 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 16:52:42,967 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:42,977 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:42,979 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 16:52:42,979 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:52:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:43,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:43,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2020-12-23 16:52:43,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139908525] [2020-12-23 16:52:43,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:52:43,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:43,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:52:43,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:52:43,267 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand 19 states. [2020-12-23 16:52:44,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:44,046 INFO L93 Difference]: Finished difference Result 168 states and 187 transitions. [2020-12-23 16:52:44,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:52:44,047 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 32 [2020-12-23 16:52:44,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:44,048 INFO L225 Difference]: With dead ends: 168 [2020-12-23 16:52:44,048 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 16:52:44,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:52:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 16:52:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2020-12-23 16:52:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 16:52:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2020-12-23 16:52:44,054 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 32 [2020-12-23 16:52:44,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:44,054 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2020-12-23 16:52:44,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:52:44,055 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2020-12-23 16:52:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 16:52:44,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:44,056 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, 1, 1, 1] [2020-12-23 16:52:44,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:52:44,271 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash 608149782, now seen corresponding path program 1 times [2020-12-23 16:52:44,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:44,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922785017] [2020-12-23 16:52:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:44,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922785017] [2020-12-23 16:52:44,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124961740] [2020-12-23 16:52:44,480 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 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 16:52:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:44,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:52:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:44,588 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:44,588 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 16:52:44,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:44,623 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:44,626 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 16:52:44,626 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:52:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:44,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:44,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2020-12-23 16:52:44,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926557789] [2020-12-23 16:52:44,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:52:44,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:44,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:52:44,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:52:44,891 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand 20 states. [2020-12-23 16:52:46,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:46,020 INFO L93 Difference]: Finished difference Result 206 states and 227 transitions. [2020-12-23 16:52:46,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:52:46,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 32 [2020-12-23 16:52:46,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:46,022 INFO L225 Difference]: With dead ends: 206 [2020-12-23 16:52:46,022 INFO L226 Difference]: Without dead ends: 191 [2020-12-23 16:52:46,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:52:46,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-12-23 16:52:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 162. [2020-12-23 16:52:46,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 16:52:46,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 183 transitions. [2020-12-23 16:52:46,028 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 183 transitions. Word has length 32 [2020-12-23 16:52:46,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:46,029 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 183 transitions. [2020-12-23 16:52:46,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:52:46,029 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 183 transitions. [2020-12-23 16:52:46,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:52:46,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:46,030 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:46,244 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:52:46,246 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash -445225321, now seen corresponding path program 4 times [2020-12-23 16:52:46,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:46,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124361337] [2020-12-23 16:52:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:52:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124361337] [2020-12-23 16:52:46,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668987148] [2020-12-23 16:52:46,438 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 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 16:52:46,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:52:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:46,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:52:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:46,690 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 16:52:46,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:46,700 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:46,702 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 16:52:46,703 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:52:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:47,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:47,232 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:47,232 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 52 [2020-12-23 16:52:47,235 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:47,236 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:52:47,237 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:47,283 INFO L625 ElimStorePlain]: treesize reduction 9, result has 79.1 percent of original size [2020-12-23 16:52:47,289 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 16:52:47,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:55, output treesize:3 [2020-12-23 16:52:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:52:47,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:47,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 27 [2020-12-23 16:52:47,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165412097] [2020-12-23 16:52:47,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:52:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:47,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:52:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:52:47,303 INFO L87 Difference]: Start difference. First operand 162 states and 183 transitions. Second operand 27 states. [2020-12-23 16:52:50,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:50,157 INFO L93 Difference]: Finished difference Result 302 states and 328 transitions. [2020-12-23 16:52:50,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 16:52:50,157 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 33 [2020-12-23 16:52:50,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:50,159 INFO L225 Difference]: With dead ends: 302 [2020-12-23 16:52:50,159 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 16:52:50,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=579, Invalid=2843, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 16:52:50,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 16:52:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 196. [2020-12-23 16:52:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-23 16:52:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 221 transitions. [2020-12-23 16:52:50,169 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 221 transitions. Word has length 33 [2020-12-23 16:52:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:50,170 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 221 transitions. [2020-12-23 16:52:50,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:52:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 221 transitions. [2020-12-23 16:52:50,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:52:50,171 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:50,171 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:50,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:50,387 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1756979051, now seen corresponding path program 2 times [2020-12-23 16:52:50,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:50,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219291871] [2020-12-23 16:52:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:50,567 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:50,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219291871] [2020-12-23 16:52:50,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448558961] [2020-12-23 16:52:50,568 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 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 16:52:50,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:52:50,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:50,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:52:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:50,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:50,691 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:50,692 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:52:50,693 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:50,727 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:50,730 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 16:52:50,730 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:52:50,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:50,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:50,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2020-12-23 16:52:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960432609] [2020-12-23 16:52:50,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 16:52:50,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:50,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 16:52:50,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-12-23 16:52:50,996 INFO L87 Difference]: Start difference. First operand 196 states and 221 transitions. Second operand 19 states. [2020-12-23 16:52:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:51,992 INFO L93 Difference]: Finished difference Result 218 states and 240 transitions. [2020-12-23 16:52:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:52:51,993 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 33 [2020-12-23 16:52:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:51,995 INFO L225 Difference]: With dead ends: 218 [2020-12-23 16:52:51,995 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 16:52:51,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:52:51,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 16:52:52,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 198. [2020-12-23 16:52:52,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-23 16:52:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2020-12-23 16:52:52,004 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 33 [2020-12-23 16:52:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:52,004 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2020-12-23 16:52:52,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 16:52:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2020-12-23 16:52:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 16:52:52,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:52,005 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:52,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:52,220 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:52,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:52,221 INFO L82 PathProgramCache]: Analyzing trace with hash 603565394, now seen corresponding path program 4 times [2020-12-23 16:52:52,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:52,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883839257] [2020-12-23 16:52:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883839257] [2020-12-23 16:52:52,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092614341] [2020-12-23 16:52:52,680 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 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 16:52:52,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:52:52,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:52,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:52:52,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:52,790 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_28|]} [2020-12-23 16:52:52,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:52:52,798 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 16:52:52,799 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:52,811 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:52,817 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 16:52:52,819 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:52,831 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:52,834 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 16:52:52,834 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:52:53,009 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 16:52:53,010 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,020 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2020-12-23 16:52:53,070 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 26 treesize of output 25 [2020-12-23 16:52:53,072 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,083 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,085 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 16:52:53,085 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:35, output treesize:31 [2020-12-23 16:52:53,405 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,406 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 33 treesize of output 60 [2020-12-23 16:52:53,409 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,450 INFO L625 ElimStorePlain]: treesize reduction 19, result has 72.1 percent of original size [2020-12-23 16:52:53,452 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 16:52:53,453 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:24 [2020-12-23 16:52:53,576 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 16:52:53,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,590 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,592 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 16:52:53,592 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:35, output treesize:20 [2020-12-23 16:52:53,729 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 16:52:53,731 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 16:52:53,744 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,750 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:52:53,753 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,753 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 16:52:53,754 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,763 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:53,765 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:53,766 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:34, output treesize:3 [2020-12-23 16:52:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:53,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:53,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2020-12-23 16:52:53,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315567192] [2020-12-23 16:52:53,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:52:53,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:53,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:52:53,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:52:53,777 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand 30 states. [2020-12-23 16:52:54,925 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 16:52:55,514 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-12-23 16:52:56,767 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-12-23 16:52:56,941 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-23 16:52:57,159 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-12-23 16:52:57,343 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2020-12-23 16:52:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:57,761 INFO L93 Difference]: Finished difference Result 304 states and 338 transitions. [2020-12-23 16:52:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:52:57,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 36 [2020-12-23 16:52:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:57,764 INFO L225 Difference]: With dead ends: 304 [2020-12-23 16:52:57,764 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 16:52:57,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=376, Invalid=2816, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:52:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 16:52:57,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 266. [2020-12-23 16:52:57,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-12-23 16:52:57,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 301 transitions. [2020-12-23 16:52:57,773 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 301 transitions. Word has length 36 [2020-12-23 16:52:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:57,773 INFO L481 AbstractCegarLoop]: Abstraction has 266 states and 301 transitions. [2020-12-23 16:52:57,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:52:57,774 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 301 transitions. [2020-12-23 16:52:57,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:52:57,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:57,775 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:52:57,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:52:57,989 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:57,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:57,990 INFO L82 PathProgramCache]: Analyzing trace with hash -541196940, now seen corresponding path program 5 times [2020-12-23 16:52:57,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:57,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176188898] [2020-12-23 16:52:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:52:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176188898] [2020-12-23 16:52:58,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010109080] [2020-12-23 16:52:58,183 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 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 16:52:58,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:52:58,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:52:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:52:58,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:52:58,285 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:52:58,285 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 16:52:58,286 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:52:58,321 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:52:58,329 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:52:58,329 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:52:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:52:58,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:52:58,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-23 16:52:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432746512] [2020-12-23 16:52:58,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:52:58,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:52:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:52:58,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:52:58,573 INFO L87 Difference]: Start difference. First operand 266 states and 301 transitions. Second operand 20 states. [2020-12-23 16:52:59,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:52:59,501 INFO L93 Difference]: Finished difference Result 445 states and 490 transitions. [2020-12-23 16:52:59,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:52:59,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2020-12-23 16:52:59,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:52:59,504 INFO L225 Difference]: With dead ends: 445 [2020-12-23 16:52:59,504 INFO L226 Difference]: Without dead ends: 445 [2020-12-23 16:52:59,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=175, Invalid=695, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:52:59,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-12-23 16:52:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 278. [2020-12-23 16:52:59,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-12-23 16:52:59,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 316 transitions. [2020-12-23 16:52:59,516 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 316 transitions. Word has length 37 [2020-12-23 16:52:59,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:52:59,516 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 316 transitions. [2020-12-23 16:52:59,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:52:59,516 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 316 transitions. [2020-12-23 16:52:59,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-23 16:52:59,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:52:59,517 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-12-23 16:52:59,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 16:52:59,733 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:52:59,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:52:59,734 INFO L82 PathProgramCache]: Analyzing trace with hash -916383204, now seen corresponding path program 2 times [2020-12-23 16:52:59,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:52:59,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321974327] [2020-12-23 16:52:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:52:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321974327] [2020-12-23 16:53:00,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173727839] [2020-12-23 16:53:00,014 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 16:53:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:00,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:00,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:00,191 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:00,191 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 16:53:00,193 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:00,230 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:53:00,233 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:00,234 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:53:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:00,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:00,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2020-12-23 16:53:00,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589595715] [2020-12-23 16:53:00,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:00,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:00,610 INFO L87 Difference]: Start difference. First operand 278 states and 316 transitions. Second operand 24 states. [2020-12-23 16:53:03,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:03,835 INFO L93 Difference]: Finished difference Result 383 states and 418 transitions. [2020-12-23 16:53:03,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 16:53:03,837 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 39 [2020-12-23 16:53:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:03,839 INFO L225 Difference]: With dead ends: 383 [2020-12-23 16:53:03,840 INFO L226 Difference]: Without dead ends: 342 [2020-12-23 16:53:03,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=387, Invalid=2063, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:53:03,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-23 16:53:03,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 271. [2020-12-23 16:53:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-12-23 16:53:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 305 transitions. [2020-12-23 16:53:03,851 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 305 transitions. Word has length 39 [2020-12-23 16:53:03,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:03,851 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 305 transitions. [2020-12-23 16:53:03,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:03,851 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 305 transitions. [2020-12-23 16:53:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:53:03,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:03,853 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:04,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 16:53:04,069 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:04,070 INFO L82 PathProgramCache]: Analyzing trace with hash 509207573, now seen corresponding path program 6 times [2020-12-23 16:53:04,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:04,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800130834] [2020-12-23 16:53:04,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:04,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800130834] [2020-12-23 16:53:04,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109860633] [2020-12-23 16:53:04,376 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 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 16:53:04,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-23 16:53:04,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 16:53:04,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:04,713 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 16:53:04,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:04,725 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:04,726 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 16:53:04,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:53:04,914 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 16:53:04,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:04,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:04,921 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 16:53:04,921 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:04,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:04,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 23 [2020-12-23 16:53:04,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632839642] [2020-12-23 16:53:04,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:04,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:04,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:04,935 INFO L87 Difference]: Start difference. First operand 271 states and 305 transitions. Second operand 23 states. [2020-12-23 16:53:06,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:06,053 INFO L93 Difference]: Finished difference Result 526 states and 572 transitions. [2020-12-23 16:53:06,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:53:06,053 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 40 [2020-12-23 16:53:06,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:06,057 INFO L225 Difference]: With dead ends: 526 [2020-12-23 16:53:06,057 INFO L226 Difference]: Without dead ends: 512 [2020-12-23 16:53:06,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:06,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2020-12-23 16:53:06,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 329. [2020-12-23 16:53:06,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 329 states. [2020-12-23 16:53:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 370 transitions. [2020-12-23 16:53:06,070 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 370 transitions. Word has length 40 [2020-12-23 16:53:06,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:06,070 INFO L481 AbstractCegarLoop]: Abstraction has 329 states and 370 transitions. [2020-12-23 16:53:06,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:06,070 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 370 transitions. [2020-12-23 16:53:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 16:53:06,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:06,071 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:06,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:53:06,285 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:06,285 INFO L82 PathProgramCache]: Analyzing trace with hash 500447765, now seen corresponding path program 5 times [2020-12-23 16:53:06,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:06,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399382736] [2020-12-23 16:53:06,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:06,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399382736] [2020-12-23 16:53:06,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641587062] [2020-12-23 16:53:06,503 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 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 16:53:06,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:53:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:06,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 16:53:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:06,640 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_31|], 1=[|v_#valid_29|]} [2020-12-23 16:53:06,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:06,646 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 16:53:06,647 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,657 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,663 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 16:53:06,668 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:06,679 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:06,681 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 16:53:06,681 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:53:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:07,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:07,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2020-12-23 16:53:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121411550] [2020-12-23 16:53:07,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:53:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:53:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:53:07,020 INFO L87 Difference]: Start difference. First operand 329 states and 370 transitions. Second operand 22 states. [2020-12-23 16:53:08,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:08,079 INFO L93 Difference]: Finished difference Result 351 states and 385 transitions. [2020-12-23 16:53:08,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:08,080 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 40 [2020-12-23 16:53:08,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:08,083 INFO L225 Difference]: With dead ends: 351 [2020-12-23 16:53:08,083 INFO L226 Difference]: Without dead ends: 351 [2020-12-23 16:53:08,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:53:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2020-12-23 16:53:08,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 334. [2020-12-23 16:53:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-12-23 16:53:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 375 transitions. [2020-12-23 16:53:08,092 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 375 transitions. Word has length 40 [2020-12-23 16:53:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:08,093 INFO L481 AbstractCegarLoop]: Abstraction has 334 states and 375 transitions. [2020-12-23 16:53:08,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:53:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 375 transitions. [2020-12-23 16:53:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-23 16:53:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:08,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:08,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 16:53:08,298 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1665988438, now seen corresponding path program 3 times [2020-12-23 16:53:08,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:08,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754916740] [2020-12-23 16:53:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:08,524 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:08,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754916740] [2020-12-23 16:53:08,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580526469] [2020-12-23 16:53:08,526 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 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 16:53:08,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:08,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:08,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 16:53:08,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:08,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:08,687 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:08,687 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:53:08,688 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:08,722 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:53:08,725 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 16:53:08,726 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:53:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:09,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:09,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2020-12-23 16:53:09,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901355989] [2020-12-23 16:53:09,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:09,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:09,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:09,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:09,064 INFO L87 Difference]: Start difference. First operand 334 states and 375 transitions. Second operand 23 states. [2020-12-23 16:53:10,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:10,671 INFO L93 Difference]: Finished difference Result 370 states and 406 transitions. [2020-12-23 16:53:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:53:10,672 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 41 [2020-12-23 16:53:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:10,676 INFO L225 Difference]: With dead ends: 370 [2020-12-23 16:53:10,676 INFO L226 Difference]: Without dead ends: 370 [2020-12-23 16:53:10,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:53:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-23 16:53:10,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 336. [2020-12-23 16:53:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-12-23 16:53:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 377 transitions. [2020-12-23 16:53:10,682 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 377 transitions. Word has length 41 [2020-12-23 16:53:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:10,683 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 377 transitions. [2020-12-23 16:53:10,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:10,683 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 377 transitions. [2020-12-23 16:53:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 16:53:10,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:10,684 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:10,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:53:10,898 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:10,898 INFO L82 PathProgramCache]: Analyzing trace with hash -203339112, now seen corresponding path program 7 times [2020-12-23 16:53:10,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:10,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009628205] [2020-12-23 16:53:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009628205] [2020-12-23 16:53:11,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693101584] [2020-12-23 16:53:11,136 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 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 16:53:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:11,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:53:11,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:11,239 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:11,239 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 16:53:11,241 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,277 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:53:11,285 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:11,287 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:53:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:11,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:11,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 26 [2020-12-23 16:53:11,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703829459] [2020-12-23 16:53:11,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:11,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:11,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:11,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:11,790 INFO L87 Difference]: Start difference. First operand 336 states and 377 transitions. Second operand 27 states. [2020-12-23 16:53:13,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:13,473 INFO L93 Difference]: Finished difference Result 598 states and 652 transitions. [2020-12-23 16:53:13,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:53:13,474 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 44 [2020-12-23 16:53:13,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:13,478 INFO L225 Difference]: With dead ends: 598 [2020-12-23 16:53:13,478 INFO L226 Difference]: Without dead ends: 598 [2020-12-23 16:53:13,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=268, Invalid=1214, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states. [2020-12-23 16:53:13,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 348. [2020-12-23 16:53:13,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-12-23 16:53:13,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 392 transitions. [2020-12-23 16:53:13,488 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 392 transitions. Word has length 44 [2020-12-23 16:53:13,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:13,488 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 392 transitions. [2020-12-23 16:53:13,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 392 transitions. [2020-12-23 16:53:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 16:53:13,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:13,490 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:13,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:13,705 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:13,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:13,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1180553501, now seen corresponding path program 6 times [2020-12-23 16:53:13,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:13,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730269444] [2020-12-23 16:53:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:13,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:14,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730269444] [2020-12-23 16:53:14,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078722251] [2020-12-23 16:53:14,329 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 16:53:14,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:53:14,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:14,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-23 16:53:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:14,498 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_30|]} [2020-12-23 16:53:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:14,505 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 16:53:14,506 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:14,523 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:14,535 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 16:53:14,537 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:14,553 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:14,554 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 16:53:14,555 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2020-12-23 16:53:14,893 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 16:53:14,897 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:14,913 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:14,914 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:14,914 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:33 [2020-12-23 16:53:14,996 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 27 treesize of output 26 [2020-12-23 16:53:14,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,021 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 16:53:15,022 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2020-12-23 16:53:15,389 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,390 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 32 treesize of output 56 [2020-12-23 16:53:15,392 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,449 INFO L625 ElimStorePlain]: treesize reduction 14, result has 78.8 percent of original size [2020-12-23 16:53:15,453 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 16:53:15,454 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:32 [2020-12-23 16:53:15,638 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 16:53:15,639 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,659 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,663 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 16:53:15,663 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:32 [2020-12-23 16:53:15,867 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 16:53:15,869 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:15,885 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:15,887 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 16:53:15,887 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:28 [2020-12-23 16:53:16,045 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 16:53:16,048 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 16:53:16,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,068 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:16,070 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,070 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 16:53:16,071 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,079 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:16,082 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:16,083 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:3 [2020-12-23 16:53:16,108 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:16,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:16,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2020-12-23 16:53:16,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160208180] [2020-12-23 16:53:16,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 16:53:16,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:16,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 16:53:16,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 16:53:16,110 INFO L87 Difference]: Start difference. First operand 348 states and 392 transitions. Second operand 37 states. [2020-12-23 16:53:17,403 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 16:53:17,930 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-12-23 16:53:18,408 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-23 16:53:18,654 WARN L197 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-12-23 16:53:18,914 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-23 16:53:19,575 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-23 16:53:20,358 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-23 16:53:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:21,020 INFO L93 Difference]: Finished difference Result 508 states and 564 transitions. [2020-12-23 16:53:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:53:21,021 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2020-12-23 16:53:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:21,023 INFO L225 Difference]: With dead ends: 508 [2020-12-23 16:53:21,023 INFO L226 Difference]: Without dead ends: 484 [2020-12-23 16:53:21,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=394, Invalid=3146, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 16:53:21,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-12-23 16:53:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 444. [2020-12-23 16:53:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-23 16:53:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 503 transitions. [2020-12-23 16:53:21,033 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 503 transitions. Word has length 44 [2020-12-23 16:53:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:21,034 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 503 transitions. [2020-12-23 16:53:21,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 16:53:21,034 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 503 transitions. [2020-12-23 16:53:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 16:53:21,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:21,035 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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 16:53:21,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:53:21,251 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:21,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:21,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1942078596, now seen corresponding path program 3 times [2020-12-23 16:53:21,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:21,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596735382] [2020-12-23 16:53:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596735382] [2020-12-23 16:53:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384470249] [2020-12-23 16:53:21,533 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 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 16:53:21,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:53:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:53:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:21,666 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:21,666 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 16:53:21,667 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:21,700 INFO L625 ElimStorePlain]: treesize reduction 10, result has 74.4 percent of original size [2020-12-23 16:53:21,702 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 16:53:21,702 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 16:53:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:22,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:22,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2020-12-23 16:53:22,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306308918] [2020-12-23 16:53:22,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:53:22,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:22,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:53:22,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:53:22,368 INFO L87 Difference]: Start difference. First operand 444 states and 503 transitions. Second operand 29 states. [2020-12-23 16:53:24,498 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 16:53:24,654 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-23 16:53:24,825 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 40 [2020-12-23 16:53:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:26,690 INFO L93 Difference]: Finished difference Result 671 states and 729 transitions. [2020-12-23 16:53:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 16:53:26,691 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 46 [2020-12-23 16:53:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:26,694 INFO L225 Difference]: With dead ends: 671 [2020-12-23 16:53:26,694 INFO L226 Difference]: Without dead ends: 627 [2020-12-23 16:53:26,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=538, Invalid=2654, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:53:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2020-12-23 16:53:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 424. [2020-12-23 16:53:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-23 16:53:26,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 475 transitions. [2020-12-23 16:53:26,705 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 475 transitions. Word has length 46 [2020-12-23 16:53:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:26,705 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 475 transitions. [2020-12-23 16:53:26,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:53:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 475 transitions. [2020-12-23 16:53:26,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:26,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:26,706 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:26,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:26,920 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:26,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:26,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1771580303, now seen corresponding path program 8 times [2020-12-23 16:53:26,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:26,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570913323] [2020-12-23 16:53:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:27,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570913323] [2020-12-23 16:53:27,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666876756] [2020-12-23 16:53:27,168 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 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 16:53:27,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:27,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 16:53:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:27,494 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 16:53:27,495 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,504 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,506 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 16:53:27,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:27,749 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 16:53:27,750 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:27,752 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:27,753 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 16:53:27,753 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 23 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:27,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:27,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2020-12-23 16:53:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208174046] [2020-12-23 16:53:27,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:53:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:53:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:53:27,763 INFO L87 Difference]: Start difference. First operand 424 states and 475 transitions. Second operand 31 states. [2020-12-23 16:53:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:29,338 INFO L93 Difference]: Finished difference Result 914 states and 989 transitions. [2020-12-23 16:53:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:53:29,339 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 47 [2020-12-23 16:53:29,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:29,343 INFO L225 Difference]: With dead ends: 914 [2020-12-23 16:53:29,343 INFO L226 Difference]: Without dead ends: 897 [2020-12-23 16:53:29,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:53:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-12-23 16:53:29,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 512. [2020-12-23 16:53:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-12-23 16:53:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 574 transitions. [2020-12-23 16:53:29,355 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 574 transitions. Word has length 47 [2020-12-23 16:53:29,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:29,356 INFO L481 AbstractCegarLoop]: Abstraction has 512 states and 574 transitions. [2020-12-23 16:53:29,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:53:29,356 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 574 transitions. [2020-12-23 16:53:29,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:29,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:29,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-12-23 16:53:29,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 16:53:29,571 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:29,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:29,571 INFO L82 PathProgramCache]: Analyzing trace with hash 995519473, now seen corresponding path program 4 times [2020-12-23 16:53:29,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:29,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169418499] [2020-12-23 16:53:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:29,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169418499] [2020-12-23 16:53:29,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862872646] [2020-12-23 16:53:29,824 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 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 16:53:29,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:29,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:29,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 16:53:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:29,933 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_31|]} [2020-12-23 16:53:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:29,941 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 16:53:29,943 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,956 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:29,961 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 5 treesize of output 3 [2020-12-23 16:53:29,963 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:29,973 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:29,974 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 16:53:29,975 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:16 [2020-12-23 16:53:30,032 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 16:53:30,033 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:30,042 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,043 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 16:53:30,043 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-23 16:53:30,150 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,151 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 16:53:30,152 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:30,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:30,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:30,174 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 16:53:30,176 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 16:53:30,176 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:44 [2020-12-23 16:53:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:53:30,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:30,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2020-12-23 16:53:30,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836087131] [2020-12-23 16:53:30,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:30,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:30,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:30,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:30,779 INFO L87 Difference]: Start difference. First operand 512 states and 574 transitions. Second operand 27 states. [2020-12-23 16:53:33,219 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-23 16:53:56,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:56,743 INFO L93 Difference]: Finished difference Result 723 states and 783 transitions. [2020-12-23 16:53:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 16:53:56,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 47 [2020-12-23 16:53:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:56,746 INFO L225 Difference]: With dead ends: 723 [2020-12-23 16:53:56,746 INFO L226 Difference]: Without dead ends: 671 [2020-12-23 16:53:56,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=879, Invalid=6234, Unknown=27, NotChecked=0, Total=7140 [2020-12-23 16:53:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2020-12-23 16:53:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 515. [2020-12-23 16:53:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-23 16:53:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 577 transitions. [2020-12-23 16:53:56,756 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 577 transitions. Word has length 47 [2020-12-23 16:53:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:56,756 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 577 transitions. [2020-12-23 16:53:56,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 577 transitions. [2020-12-23 16:53:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 16:53:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:56,758 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:56,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:56,973 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash 588049120, now seen corresponding path program 7 times [2020-12-23 16:53:56,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:56,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970230245] [2020-12-23 16:53:56,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:56,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970230245] [2020-12-23 16:53:57,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793485126] [2020-12-23 16:53:57,224 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 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 16:53:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:57,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:53:57,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:57,317 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_37|], 1=[|v_#valid_32|]} [2020-12-23 16:53:57,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:57,321 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 16:53:57,322 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:57,334 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:57,339 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 16:53:57,341 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:57,353 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:57,355 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 16:53:57,355 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:57,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:57,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2020-12-23 16:53:57,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44038982] [2020-12-23 16:53:57,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:53:57,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:57,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:53:57,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:57,856 INFO L87 Difference]: Start difference. First operand 515 states and 577 transitions. Second operand 27 states. [2020-12-23 16:53:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:59,268 INFO L93 Difference]: Finished difference Result 558 states and 611 transitions. [2020-12-23 16:53:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:53:59,268 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 48 [2020-12-23 16:53:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:59,272 INFO L225 Difference]: With dead ends: 558 [2020-12-23 16:53:59,272 INFO L226 Difference]: Without dead ends: 558 [2020-12-23 16:53:59,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:53:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2020-12-23 16:53:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 520. [2020-12-23 16:53:59,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520 states. [2020-12-23 16:53:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 582 transitions. [2020-12-23 16:53:59,281 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 582 transitions. Word has length 48 [2020-12-23 16:53:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:59,281 INFO L481 AbstractCegarLoop]: Abstraction has 520 states and 582 transitions. [2020-12-23 16:53:59,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:53:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 582 transitions. [2020-12-23 16:53:59,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:53:59,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:59,283 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:59,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 16:53:59,499 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:53:59,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:59,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1049653567, now seen corresponding path program 4 times [2020-12-23 16:53:59,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:59,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62929293] [2020-12-23 16:53:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:59,769 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62929293] [2020-12-23 16:53:59,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695468001] [2020-12-23 16:53:59,770 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 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 16:53:59,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:59,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:59,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 16:53:59,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:59,873 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_33|]} [2020-12-23 16:53:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:59,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:59,888 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 16:53:59,889 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,903 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:59,908 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 5 treesize of output 3 [2020-12-23 16:53:59,910 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:59,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:59,923 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 16:53:59,923 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:32, output treesize:19 [2020-12-23 16:54:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:00,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:00,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2020-12-23 16:54:00,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53816246] [2020-12-23 16:54:00,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 16:54:00,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:00,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 16:54:00,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:54:00,621 INFO L87 Difference]: Start difference. First operand 520 states and 582 transitions. Second operand 27 states. [2020-12-23 16:54:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:03,176 INFO L93 Difference]: Finished difference Result 583 states and 639 transitions. [2020-12-23 16:54:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:54:03,177 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 49 [2020-12-23 16:54:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:03,180 INFO L225 Difference]: With dead ends: 583 [2020-12-23 16:54:03,180 INFO L226 Difference]: Without dead ends: 583 [2020-12-23 16:54:03,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=259, Invalid=1301, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:54:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2020-12-23 16:54:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 522. [2020-12-23 16:54:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-12-23 16:54:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 584 transitions. [2020-12-23 16:54:03,189 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 584 transitions. Word has length 49 [2020-12-23 16:54:03,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:03,189 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 584 transitions. [2020-12-23 16:54:03,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 16:54:03,190 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 584 transitions. [2020-12-23 16:54:03,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:54:03,191 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:03,191 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:03,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:03,406 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:03,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1424251762, now seen corresponding path program 9 times [2020-12-23 16:54:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:03,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810707509] [2020-12-23 16:54:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:03,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 15 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:03,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810707509] [2020-12-23 16:54:03,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927409968] [2020-12-23 16:54:03,703 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 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 16:54:03,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-23 16:54:03,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 16:54:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:03,839 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:03,840 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 16:54:03,841 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:03,869 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:54:03,873 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:03,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:54:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 28 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:04,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2020-12-23 16:54:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255962548] [2020-12-23 16:54:04,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:54:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:54:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:04,521 INFO L87 Difference]: Start difference. First operand 522 states and 584 transitions. Second operand 32 states. [2020-12-23 16:54:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:06,730 INFO L93 Difference]: Finished difference Result 969 states and 1053 transitions. [2020-12-23 16:54:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:54:06,731 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 51 [2020-12-23 16:54:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:06,735 INFO L225 Difference]: With dead ends: 969 [2020-12-23 16:54:06,735 INFO L226 Difference]: Without dead ends: 969 [2020-12-23 16:54:06,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=392, Invalid=1678, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:54:06,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-12-23 16:54:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 537. [2020-12-23 16:54:06,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-12-23 16:54:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 603 transitions. [2020-12-23 16:54:06,744 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 603 transitions. Word has length 51 [2020-12-23 16:54:06,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:06,745 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 603 transitions. [2020-12-23 16:54:06,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:54:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 603 transitions. [2020-12-23 16:54:06,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 16:54:06,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:06,746 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:06,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 16:54:06,961 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:06,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1427430296, now seen corresponding path program 8 times [2020-12-23 16:54:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:06,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035487749] [2020-12-23 16:54:06,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:07,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035487749] [2020-12-23 16:54:07,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916691122] [2020-12-23 16:54:07,660 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 16:54:07,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:07,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:07,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:54:07,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:08,143 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 16:54:08,144 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:08,154 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:08,156 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 16:54:08,156 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 16:54:08,265 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:08,265 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 63 [2020-12-23 16:54:08,267 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:08,310 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-23 16:54:08,311 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 16:54:08,312 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-23 16:54:08,859 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 22 [2020-12-23 16:54:09,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:09,183 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2020-12-23 16:54:09,184 INFO L348 Elim1Store]: treesize reduction 20, result has 80.4 percent of original size [2020-12-23 16:54:09,184 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 98 [2020-12-23 16:54:09,195 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:09,261 INFO L625 ElimStorePlain]: treesize reduction 46, result has 53.1 percent of original size [2020-12-23 16:54:09,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:09,263 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 16:54:09,264 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:52 [2020-12-23 16:54:09,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:09,388 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:09,804 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 6, 1] term [2020-12-23 16:54:09,804 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:09,810 INFO L443 ElimStorePlain]: Different costs {11=[v_prenex_8], 19=[|v_#memory_int_33|]} [2020-12-23 16:54:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:09,834 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:09,834 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 57 [2020-12-23 16:54:09,836 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:09,950 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 56 [2020-12-23 16:54:09,951 INFO L625 ElimStorePlain]: treesize reduction 12, result has 90.2 percent of original size [2020-12-23 16:54:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:10,158 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-12-23 16:54:10,159 INFO L348 Elim1Store]: treesize reduction 32, result has 79.9 percent of original size [2020-12-23 16:54:10,160 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 147 [2020-12-23 16:54:10,170 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 16:54:10,171 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 5 disjuncts [2020-12-23 16:54:10,171 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 16:54:10,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:54:10,172 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:10,176 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:10,370 WARN L197 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-12-23 16:54:10,371 INFO L625 ElimStorePlain]: treesize reduction 87, result has 61.0 percent of original size [2020-12-23 16:54:10,375 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:10,378 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 2 dim-2 vars, End of recursive call: 4 dim-0 vars, and 2 xjuncts. [2020-12-23 16:54:10,378 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 9 variables, input treesize:110, output treesize:125 [2020-12-23 16:54:10,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:10,695 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2020-12-23 16:54:10,697 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:10,712 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:10,714 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 16:54:10,714 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:31 [2020-12-23 16:54:10,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:10,959 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2020-12-23 16:54:10,960 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:10,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:10,978 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:10,978 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:42, output treesize:27 [2020-12-23 16:54:11,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:11,218 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:11,220 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,221 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 25 treesize of output 14 [2020-12-23 16:54:11,222 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:11,230 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:11,232 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 16:54:11,233 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:3 [2020-12-23 16:54:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:11,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:11,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 48 [2020-12-23 16:54:11,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736902120] [2020-12-23 16:54:11,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 16:54:11,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:11,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 16:54:11,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:54:11,252 INFO L87 Difference]: Start difference. First operand 537 states and 603 transitions. Second operand 48 states. [2020-12-23 16:54:13,311 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2020-12-23 16:54:13,562 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-12-23 16:54:13,945 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-12-23 16:54:14,325 WARN L197 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-12-23 16:54:14,964 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 47 [2020-12-23 16:54:15,299 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-12-23 16:54:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:18,770 INFO L93 Difference]: Finished difference Result 764 states and 848 transitions. [2020-12-23 16:54:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 16:54:18,771 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 52 [2020-12-23 16:54:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:18,775 INFO L225 Difference]: With dead ends: 764 [2020-12-23 16:54:18,775 INFO L226 Difference]: Without dead ends: 737 [2020-12-23 16:54:18,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=555, Invalid=6585, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 16:54:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2020-12-23 16:54:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 661. [2020-12-23 16:54:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 661 states. [2020-12-23 16:54:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 747 transitions. [2020-12-23 16:54:18,784 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 747 transitions. Word has length 52 [2020-12-23 16:54:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:18,785 INFO L481 AbstractCegarLoop]: Abstraction has 661 states and 747 transitions. [2020-12-23 16:54:18,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 16:54:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 747 transitions. [2020-12-23 16:54:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-23 16:54:18,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:18,786 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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 16:54:19,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:19,002 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:19,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:19,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1083226314, now seen corresponding path program 5 times [2020-12-23 16:54:19,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:19,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841224251] [2020-12-23 16:54:19,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:19,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841224251] [2020-12-23 16:54:19,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844506998] [2020-12-23 16:54:19,359 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 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 16:54:19,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 16:54:19,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:54:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:19,540 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:19,541 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 16:54:19,542 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:19,573 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:54:19,575 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 16:54:19,575 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:54:20,088 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:20,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:20,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 27 [2020-12-23 16:54:20,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277547610] [2020-12-23 16:54:20,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:54:20,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:20,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:54:20,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:54:20,089 INFO L87 Difference]: Start difference. First operand 661 states and 747 transitions. Second operand 28 states. [2020-12-23 16:54:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:22,258 INFO L93 Difference]: Finished difference Result 1030 states and 1120 transitions. [2020-12-23 16:54:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:54:22,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 53 [2020-12-23 16:54:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:22,264 INFO L225 Difference]: With dead ends: 1030 [2020-12-23 16:54:22,264 INFO L226 Difference]: Without dead ends: 994 [2020-12-23 16:54:22,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=1441, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 16:54:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 994 states. [2020-12-23 16:54:22,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 994 to 622. [2020-12-23 16:54:22,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2020-12-23 16:54:22,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 695 transitions. [2020-12-23 16:54:22,275 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 695 transitions. Word has length 53 [2020-12-23 16:54:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:22,275 INFO L481 AbstractCegarLoop]: Abstraction has 622 states and 695 transitions. [2020-12-23 16:54:22,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:54:22,275 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 695 transitions. [2020-12-23 16:54:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 16:54:22,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:22,277 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:22,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 16:54:22,492 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:22,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 97693371, now seen corresponding path program 10 times [2020-12-23 16:54:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:22,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163850911] [2020-12-23 16:54:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:54:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163850911] [2020-12-23 16:54:22,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633741703] [2020-12-23 16:54:22,830 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 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 16:54:22,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:54:22,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:22,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 16:54:22,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:23,326 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 16:54:23,327 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:23,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:23,337 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 16:54:23,338 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:54:24,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:24,945 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:24,946 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 68 treesize of output 103 [2020-12-23 16:54:24,952 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:24,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:24,954 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:24,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:24,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:24,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:25,022 INFO L625 ElimStorePlain]: treesize reduction 9, result has 85.9 percent of original size [2020-12-23 16:54:25,037 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 16:54:25,037 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:85, output treesize:3 [2020-12-23 16:54:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:54:25,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:25,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 45 [2020-12-23 16:54:25,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588186399] [2020-12-23 16:54:25,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 16:54:25,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:25,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 16:54:25,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1829, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:54:25,065 INFO L87 Difference]: Start difference. First operand 622 states and 695 transitions. Second operand 45 states. [2020-12-23 16:54:35,227 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-12-23 16:54:37,959 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-12-23 16:54:38,185 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-12-23 16:54:38,570 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-23 16:54:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:41,037 INFO L93 Difference]: Finished difference Result 1446 states and 1559 transitions. [2020-12-23 16:54:41,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-12-23 16:54:41,039 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 54 [2020-12-23 16:54:41,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:41,045 INFO L225 Difference]: With dead ends: 1446 [2020-12-23 16:54:41,045 INFO L226 Difference]: Without dead ends: 1426 [2020-12-23 16:54:41,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6329 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=1846, Invalid=19324, Unknown=0, NotChecked=0, Total=21170 [2020-12-23 16:54:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2020-12-23 16:54:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 746. [2020-12-23 16:54:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 746 states. [2020-12-23 16:54:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 746 states to 746 states and 835 transitions. [2020-12-23 16:54:41,061 INFO L78 Accepts]: Start accepts. Automaton has 746 states and 835 transitions. Word has length 54 [2020-12-23 16:54:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:41,061 INFO L481 AbstractCegarLoop]: Abstraction has 746 states and 835 transitions. [2020-12-23 16:54:41,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 16:54:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 746 states and 835 transitions. [2020-12-23 16:54:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 16:54:41,063 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:41,063 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:41,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 16:54:41,277 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash 411662583, now seen corresponding path program 6 times [2020-12-23 16:54:41,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:41,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037574589] [2020-12-23 16:54:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:41,661 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037574589] [2020-12-23 16:54:41,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751487941] [2020-12-23 16:54:41,661 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 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 16:54:41,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 16:54:41,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:41,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 16:54:41,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:41,801 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:41,802 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 16:54:41,803 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:41,840 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:54:41,845 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 16:54:41,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:54:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:54:42,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:42,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2020-12-23 16:54:42,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739301820] [2020-12-23 16:54:42,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 16:54:42,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:42,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 16:54:42,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-12-23 16:54:42,570 INFO L87 Difference]: Start difference. First operand 746 states and 835 transitions. Second operand 30 states. [2020-12-23 16:54:47,194 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-23 16:54:47,770 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-12-23 16:54:48,374 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-12-23 16:54:49,229 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-12-23 16:54:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:50,825 INFO L93 Difference]: Finished difference Result 1134 states and 1224 transitions. [2020-12-23 16:54:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 16:54:50,826 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 54 [2020-12-23 16:54:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:50,830 INFO L225 Difference]: With dead ends: 1134 [2020-12-23 16:54:50,830 INFO L226 Difference]: Without dead ends: 1067 [2020-12-23 16:54:50,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1427, Invalid=5215, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 16:54:50,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-12-23 16:54:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 755. [2020-12-23 16:54:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 755 states. [2020-12-23 16:54:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 755 states to 755 states and 844 transitions. [2020-12-23 16:54:50,845 INFO L78 Accepts]: Start accepts. Automaton has 755 states and 844 transitions. Word has length 54 [2020-12-23 16:54:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:50,845 INFO L481 AbstractCegarLoop]: Abstraction has 755 states and 844 transitions. [2020-12-23 16:54:50,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 16:54:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 755 states and 844 transitions. [2020-12-23 16:54:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:54:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:50,847 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:51,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 16:54:51,062 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash 126995243, now seen corresponding path program 9 times [2020-12-23 16:54:51,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:51,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157252317] [2020-12-23 16:54:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:51,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157252317] [2020-12-23 16:54:51,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22151605] [2020-12-23 16:54:51,410 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 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 16:54:51,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:54:51,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 16:54:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:51,668 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:51,669 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 16:54:51,671 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:51,717 INFO L625 ElimStorePlain]: treesize reduction 10, result has 73.0 percent of original size [2020-12-23 16:54:51,719 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:51,720 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:22 [2020-12-23 16:54:52,044 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,134 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 16:54:52,136 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,142 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 16:54:52,143 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,170 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,172 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 2 xjuncts. [2020-12-23 16:54:52,172 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:42, output treesize:34 [2020-12-23 16:54:52,358 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 16:54:52,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,571 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-23 16:54:52,572 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,576 INFO L443 ElimStorePlain]: Different costs {0=[v_prenex_10], 1=[|#memory_int|]} [2020-12-23 16:54:52,581 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 16:54:52,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,600 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,613 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,613 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 15 [2020-12-23 16:54:52,615 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:52,667 INFO L625 ElimStorePlain]: treesize reduction 4, result has 84.0 percent of original size [2020-12-23 16:54:52,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-12-23 16:54:52,672 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:42, output treesize:17 [2020-12-23 16:54:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:53,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:53,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 35 [2020-12-23 16:54:53,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222143521] [2020-12-23 16:54:53,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:54:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:53,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:54:53,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:54:53,245 INFO L87 Difference]: Start difference. First operand 755 states and 844 transitions. Second operand 36 states. [2020-12-23 16:54:54,893 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 38 [2020-12-23 16:54:55,252 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 41 [2020-12-23 16:54:55,595 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2020-12-23 16:54:55,989 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-23 16:54:56,588 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-12-23 16:54:57,164 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-23 16:54:57,735 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 37 [2020-12-23 16:54:58,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:58,757 INFO L93 Difference]: Finished difference Result 870 states and 949 transitions. [2020-12-23 16:54:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 16:54:58,758 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 56 [2020-12-23 16:54:58,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:58,762 INFO L225 Difference]: With dead ends: 870 [2020-12-23 16:54:58,762 INFO L226 Difference]: Without dead ends: 870 [2020-12-23 16:54:58,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=723, Invalid=3699, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 16:54:58,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2020-12-23 16:54:58,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 760. [2020-12-23 16:54:58,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-23 16:54:58,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 849 transitions. [2020-12-23 16:54:58,783 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 849 transitions. Word has length 56 [2020-12-23 16:54:58,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:58,785 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 849 transitions. [2020-12-23 16:54:58,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:54:58,785 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 849 transitions. [2020-12-23 16:54:58,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:54:58,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:58,787 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-12-23 16:54:58,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 16:54:58,992 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:54:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:58,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1725129529, now seen corresponding path program 7 times [2020-12-23 16:54:58,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:58,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984318699] [2020-12-23 16:54:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:59,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984318699] [2020-12-23 16:54:59,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309943838] [2020-12-23 16:54:59,364 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 16:54:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 16:54:59,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:59,499 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:59,499 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 16:54:59,500 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:59,537 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:54:59,539 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 16:54:59,540 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:55:00,279 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:00,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:00,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 16:55:00,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982182288] [2020-12-23 16:55:00,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:55:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:55:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=846, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:55:00,280 INFO L87 Difference]: Start difference. First operand 760 states and 849 transitions. Second operand 31 states. [2020-12-23 16:55:02,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:02,895 INFO L93 Difference]: Finished difference Result 940 states and 1025 transitions. [2020-12-23 16:55:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:55:02,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 56 [2020-12-23 16:55:02,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:02,900 INFO L225 Difference]: With dead ends: 940 [2020-12-23 16:55:02,900 INFO L226 Difference]: Without dead ends: 913 [2020-12-23 16:55:02,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=326, Invalid=1654, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:55:02,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2020-12-23 16:55:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 760. [2020-12-23 16:55:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-23 16:55:02,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 849 transitions. [2020-12-23 16:55:02,913 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 849 transitions. Word has length 56 [2020-12-23 16:55:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:02,913 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 849 transitions. [2020-12-23 16:55:02,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:55:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 849 transitions. [2020-12-23 16:55:02,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-23 16:55:02,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:02,915 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:03,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:03,129 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:03,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:03,129 INFO L82 PathProgramCache]: Analyzing trace with hash -358114732, now seen corresponding path program 5 times [2020-12-23 16:55:03,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:03,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032542728] [2020-12-23 16:55:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032542728] [2020-12-23 16:55:03,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165018341] [2020-12-23 16:55:03,511 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 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 16:55:03,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 16:55:03,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:03,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 16:55:03,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:03,684 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:03,684 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 1 case distinctions, treesize of input 9 treesize of output 25 [2020-12-23 16:55:03,686 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:03,728 INFO L625 ElimStorePlain]: treesize reduction 10, result has 74.4 percent of original size [2020-12-23 16:55:03,730 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 16:55:03,731 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:24, output treesize:17 [2020-12-23 16:55:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 1 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:04,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:04,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2020-12-23 16:55:04,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769887043] [2020-12-23 16:55:04,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 16:55:04,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:04,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 16:55:04,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2020-12-23 16:55:04,539 INFO L87 Difference]: Start difference. First operand 760 states and 849 transitions. Second operand 31 states. [2020-12-23 16:55:06,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:06,955 INFO L93 Difference]: Finished difference Result 861 states and 944 transitions. [2020-12-23 16:55:06,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:55:06,956 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 57 [2020-12-23 16:55:06,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:06,961 INFO L225 Difference]: With dead ends: 861 [2020-12-23 16:55:06,961 INFO L226 Difference]: Without dead ends: 861 [2020-12-23 16:55:06,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=266, Invalid=1714, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:55:06,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2020-12-23 16:55:06,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 762. [2020-12-23 16:55:06,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 762 states. [2020-12-23 16:55:06,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 851 transitions. [2020-12-23 16:55:06,975 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 851 transitions. Word has length 57 [2020-12-23 16:55:06,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:06,975 INFO L481 AbstractCegarLoop]: Abstraction has 762 states and 851 transitions. [2020-12-23 16:55:06,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 16:55:06,975 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 851 transitions. [2020-12-23 16:55:06,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:55:06,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:06,977 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:07,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:07,191 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:07,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1967721474, now seen corresponding path program 11 times [2020-12-23 16:55:07,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:07,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737167118] [2020-12-23 16:55:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 28 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:07,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737167118] [2020-12-23 16:55:07,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703965422] [2020-12-23 16:55:07,655 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 16:55:07,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-23 16:55:07,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 16:55:07,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:07,798 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:07,799 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 16:55:07,801 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:07,842 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:55:07,845 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:07,845 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:21, output treesize:11 [2020-12-23 16:55:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:08,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:08,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2020-12-23 16:55:08,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443830914] [2020-12-23 16:55:08,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:55:08,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:08,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:55:08,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:55:08,624 INFO L87 Difference]: Start difference. First operand 762 states and 851 transitions. Second operand 32 states. [2020-12-23 16:55:10,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:10,631 INFO L93 Difference]: Finished difference Result 1472 states and 1594 transitions. [2020-12-23 16:55:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 16:55:10,632 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 58 [2020-12-23 16:55:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:10,638 INFO L225 Difference]: With dead ends: 1472 [2020-12-23 16:55:10,638 INFO L226 Difference]: Without dead ends: 1472 [2020-12-23 16:55:10,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 16:55:10,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-12-23 16:55:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 780. [2020-12-23 16:55:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-12-23 16:55:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 874 transitions. [2020-12-23 16:55:10,649 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 874 transitions. Word has length 58 [2020-12-23 16:55:10,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:10,650 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 874 transitions. [2020-12-23 16:55:10,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:55:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 874 transitions. [2020-12-23 16:55:10,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 16:55:10,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:10,651 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:10,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-12-23 16:55:10,852 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:10,853 INFO L82 PathProgramCache]: Analyzing trace with hash 102819635, now seen corresponding path program 10 times [2020-12-23 16:55:10,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:10,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341039493] [2020-12-23 16:55:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:11,995 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:11,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341039493] [2020-12-23 16:55:11,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156965963] [2020-12-23 16:55:11,996 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 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 16:55:12,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:55:12,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:12,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 16:55:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:12,117 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_46|], 1=[|v_#valid_34|]} [2020-12-23 16:55:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:12,123 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 16:55:12,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,156 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:12,163 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 16:55:12,165 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,179 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:12,181 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 16:55:12,181 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:55:12,713 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 16:55:12,714 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,726 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:12,727 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,727 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:25 [2020-12-23 16:55:12,816 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 27 treesize of output 26 [2020-12-23 16:55:12,818 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,832 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:12,835 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 16:55:12,835 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:35 [2020-12-23 16:55:13,250 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:13,251 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 34 treesize of output 61 [2020-12-23 16:55:13,253 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:13,312 INFO L625 ElimStorePlain]: treesize reduction 19, result has 74.3 percent of original size [2020-12-23 16:55:13,315 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:13,315 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:51, output treesize:30 [2020-12-23 16:55:13,555 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 16:55:13,557 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:13,577 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:13,579 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 16:55:13,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-23 16:55:13,830 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 16:55:13,831 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:13,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:13,850 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 16:55:13,851 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-23 16:55:14,129 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 16:55:14,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:14,148 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:14,150 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 16:55:14,151 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:41, output treesize:30 [2020-12-23 16:55:14,411 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 16:55:14,412 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:14,430 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:14,432 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:14,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:41, output treesize:26 [2020-12-23 16:55:14,677 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 25 treesize of output 19 [2020-12-23 16:55:14,679 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 16:55:14,697 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:14,705 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:55:14,708 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:14,709 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 16:55:14,710 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:14,724 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:14,726 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:14,726 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:40, output treesize:3 [2020-12-23 16:55:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 30 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:14,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:14,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 50 [2020-12-23 16:55:14,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156786458] [2020-12-23 16:55:14,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 16:55:14,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:14,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 16:55:14,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:55:14,751 INFO L87 Difference]: Start difference. First operand 780 states and 874 transitions. Second operand 50 states. [2020-12-23 16:55:17,612 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:55:18,843 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-12-23 16:55:19,978 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 16:55:20,418 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 16:55:20,637 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-12-23 16:55:22,751 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:55:23,749 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:55:25,050 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-12-23 16:55:26,541 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 16:55:26,799 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-12-23 16:55:27,506 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:55:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:35,247 INFO L93 Difference]: Finished difference Result 1103 states and 1216 transitions. [2020-12-23 16:55:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 16:55:35,248 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 60 [2020-12-23 16:55:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:35,252 INFO L225 Difference]: With dead ends: 1103 [2020-12-23 16:55:35,253 INFO L226 Difference]: Without dead ends: 1072 [2020-12-23 16:55:35,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1053, Invalid=12753, Unknown=0, NotChecked=0, Total=13806 [2020-12-23 16:55:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2020-12-23 16:55:35,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 935. [2020-12-23 16:55:35,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 935 states. [2020-12-23 16:55:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 935 states to 935 states and 1055 transitions. [2020-12-23 16:55:35,267 INFO L78 Accepts]: Start accepts. Automaton has 935 states and 1055 transitions. Word has length 60 [2020-12-23 16:55:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:35,268 INFO L481 AbstractCegarLoop]: Abstraction has 935 states and 1055 transitions. [2020-12-23 16:55:35,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 16:55:35,268 INFO L276 IsEmpty]: Start isEmpty. Operand 935 states and 1055 transitions. [2020-12-23 16:55:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 16:55:35,270 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:35,270 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 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 16:55:35,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:35,477 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:35,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:35,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1052716770, now seen corresponding path program 8 times [2020-12-23 16:55:35,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:35,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70993839] [2020-12-23 16:55:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70993839] [2020-12-23 16:55:36,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751736203] [2020-12-23 16:55:36,032 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 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 16:55:36,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:36,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 16:55:36,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:36,161 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:36,162 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 16:55:36,164 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:36,212 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:55:36,216 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 16:55:36,217 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:55:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 15 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-23 16:55:37,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:37,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 32 [2020-12-23 16:55:37,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166638972] [2020-12-23 16:55:37,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:55:37,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:37,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:55:37,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=965, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:55:37,163 INFO L87 Difference]: Start difference. First operand 935 states and 1055 transitions. Second operand 33 states. [2020-12-23 16:55:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:42,909 INFO L93 Difference]: Finished difference Result 1581 states and 1708 transitions. [2020-12-23 16:55:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:55:42,911 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 60 [2020-12-23 16:55:42,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:42,916 INFO L225 Difference]: With dead ends: 1581 [2020-12-23 16:55:42,916 INFO L226 Difference]: Without dead ends: 1498 [2020-12-23 16:55:42,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=548, Invalid=2758, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 16:55:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2020-12-23 16:55:42,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 880. [2020-12-23 16:55:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-12-23 16:55:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 981 transitions. [2020-12-23 16:55:42,931 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 981 transitions. Word has length 60 [2020-12-23 16:55:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:42,931 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 981 transitions. [2020-12-23 16:55:42,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:55:42,932 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 981 transitions. [2020-12-23 16:55:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-23 16:55:42,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:42,933 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:43,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:43,149 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:43,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:43,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1618209099, now seen corresponding path program 12 times [2020-12-23 16:55:43,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:43,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757848151] [2020-12-23 16:55:43,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:43,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:55:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757848151] [2020-12-23 16:55:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550996211] [2020-12-23 16:55:43,658 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 16:55:43,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-23 16:55:43,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 16:55:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:44,195 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 16:55:44,197 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:44,209 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:44,210 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 16:55:44,211 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:17 [2020-12-23 16:55:44,428 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 16:55:44,429 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:44,432 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:44,433 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 16:55:44,433 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:55:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 33 proven. 123 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:55:44,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:44,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 32 [2020-12-23 16:55:44,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839110420] [2020-12-23 16:55:44,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:55:44,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:55:44,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:55:44,446 INFO L87 Difference]: Start difference. First operand 880 states and 981 transitions. Second operand 32 states. [2020-12-23 16:55:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:47,595 INFO L93 Difference]: Finished difference Result 2083 states and 2239 transitions. [2020-12-23 16:55:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:55:47,596 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 61 [2020-12-23 16:55:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:47,603 INFO L225 Difference]: With dead ends: 2083 [2020-12-23 16:55:47,603 INFO L226 Difference]: Without dead ends: 2060 [2020-12-23 16:55:47,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 16:55:47,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2020-12-23 16:55:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1046. [2020-12-23 16:55:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2020-12-23 16:55:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1169 transitions. [2020-12-23 16:55:47,622 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1169 transitions. Word has length 61 [2020-12-23 16:55:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:47,622 INFO L481 AbstractCegarLoop]: Abstraction has 1046 states and 1169 transitions. [2020-12-23 16:55:47,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:55:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1169 transitions. [2020-12-23 16:55:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 16:55:47,624 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:47,624 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:47,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:47,838 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1739829774, now seen corresponding path program 9 times [2020-12-23 16:55:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:47,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749652781] [2020-12-23 16:55:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749652781] [2020-12-23 16:55:48,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79737989] [2020-12-23 16:55:48,339 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 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 16:55:48,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:55:48,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:48,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 16:55:48,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:48,513 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:48,513 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 16:55:48,515 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,566 INFO L625 ElimStorePlain]: treesize reduction 10, result has 72.2 percent of original size [2020-12-23 16:55:48,568 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 16:55:48,569 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:14 [2020-12-23 16:55:49,759 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:49,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:49,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2020-12-23 16:55:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724088923] [2020-12-23 16:55:49,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 16:55:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 16:55:49,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1085, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:55:49,761 INFO L87 Difference]: Start difference. First operand 1046 states and 1169 transitions. Second operand 35 states. [2020-12-23 16:55:52,729 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2020-12-23 16:55:52,904 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-23 16:55:53,087 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2020-12-23 16:55:53,651 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-12-23 16:55:54,114 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-12-23 16:55:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:54,882 INFO L93 Difference]: Finished difference Result 1499 states and 1625 transitions. [2020-12-23 16:55:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:55:54,884 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 62 [2020-12-23 16:55:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:54,889 INFO L225 Difference]: With dead ends: 1499 [2020-12-23 16:55:54,889 INFO L226 Difference]: Without dead ends: 1462 [2020-12-23 16:55:54,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=585, Invalid=2495, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:55:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1462 states. [2020-12-23 16:55:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1462 to 1052. [2020-12-23 16:55:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1052 states. [2020-12-23 16:55:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 1175 transitions. [2020-12-23 16:55:54,900 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 1175 transitions. Word has length 62 [2020-12-23 16:55:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:54,900 INFO L481 AbstractCegarLoop]: Abstraction has 1052 states and 1175 transitions. [2020-12-23 16:55:54,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 16:55:54,900 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 1175 transitions. [2020-12-23 16:55:54,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 16:55:54,901 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:54,901 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:55,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 16:55:55,102 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_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 16:55:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash -983535333, now seen corresponding path program 10 times [2020-12-23 16:55:55,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:55,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742960277] [2020-12-23 16:55:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:55:55,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742960277] [2020-12-23 16:55:55,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456775042] [2020-12-23 16:55:55,678 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 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 16:55:55,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:55:55,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:55,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 98 conjunts are in the unsatisfiable core [2020-12-23 16:55:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:55,833 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_49|], 1=[|v_#valid_35|]} [2020-12-23 16:55:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:55,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:55,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 16:55:55,844 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:55,865 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:55,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:55,874 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 5 treesize of output 3 [2020-12-23 16:55:55,876 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:55,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:55,894 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 16:55:55,895 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:16 [2020-12-23 16:55:56,016 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 16:55:56,017 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,033 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,034 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 16:55:56,035 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:26 [2020-12-23 16:55:56,231 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,232 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 16:55:56,233 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:56,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:55:56,268 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-23 16:55:56,270 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 16:55:56,270 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:44 [2020-12-23 16:55:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-23 16:55:57,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:57,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2020-12-23 16:55:57,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450956228] [2020-12-23 16:55:57,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:55:57,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:55:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=987, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:55:57,404 INFO L87 Difference]: Start difference. First operand 1052 states and 1175 transitions. Second operand 33 states. [2020-12-23 16:56:02,925 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 54 [2020-12-23 16:56:03,211 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2020-12-23 16:56:03,457 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-12-23 16:56:03,716 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-23 16:56:04,013 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-12-23 16:56:04,239 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-12-23 16:56:05,177 WARN L197 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-23 16:56:05,384 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50