/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_cstrstr-alloca-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 16:53:30,741 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 16:53:30,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 16:53:30,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 16:53:30,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 16:53:30,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 16:53:30,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 16:53:30,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 16:53:30,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 16:53:30,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 16:53:30,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 16:53:30,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 16:53:30,790 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 16:53:30,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 16:53:30,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 16:53:30,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 16:53:30,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 16:53:30,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 16:53:30,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 16:53:30,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 16:53:30,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 16:53:30,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 16:53:30,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 16:53:30,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 16:53:30,831 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 16:53:30,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 16:53:30,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 16:53:30,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 16:53:30,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2020-12-23 16:53:30,870 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 16:53:30,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 16:53:30,872 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 16:53:30,873 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 16:53:30,873 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 16:53:30,873 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 16:53:30,874 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-23 16:53:30,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 16:53:30,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 16:53:30,874 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-23 16:53:30,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-23 16:53:30,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-23 16:53:30,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 16:53:30,876 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-23 16:53:30,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 16:53:30,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 16:53:30,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 16:53:30,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 16:53:30,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:30,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 16:53:30,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 16:53:30,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 16:53:30,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 16:53:30,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 16:53:30,879 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 16:53:31,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 16:53:31,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 16:53:31,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 16:53:31,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 16:53:31,306 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 16:53:31,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2020-12-23 16:53:31,394 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05ad70c40/0f7b63544bf342a3a5918d5299a50f93/FLAG88c6b0072 [2020-12-23 16:53:32,061 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 16:53:32,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrstr-alloca-2.i [2020-12-23 16:53:32,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05ad70c40/0f7b63544bf342a3a5918d5299a50f93/FLAG88c6b0072 [2020-12-23 16:53:32,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/05ad70c40/0f7b63544bf342a3a5918d5299a50f93 [2020-12-23 16:53:32,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 16:53:32,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 16:53:32,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:32,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 16:53:32,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 16:53:32,390 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:32,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261d16f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32, skipping insertion in model container [2020-12-23 16:53:32,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:32,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 16:53:32,461 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~len~0,] left hand side expression in assignment: lhs: VariableLHS[~sc~0,] 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: 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[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:32,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:32,788 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: lhs: VariableLHS[~c~0,] left hand side expression in assignment: lhs: VariableLHS[~len~0,] left hand side expression in assignment: lhs: VariableLHS[~sc~0,] 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: 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[~length2~0,],IntegerLiteral[1]]]]] [2020-12-23 16:53:32,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 16:53:32,899 INFO L208 MainTranslator]: Completed translation [2020-12-23 16:53:32,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32 WrapperNode [2020-12-23 16:53:32,900 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 16:53:32,901 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:32,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 16:53:32,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 16:53:32,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:32,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,001 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 16:53:33,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 16:53:33,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 16:53:33,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 16:53:33,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... [2020-12-23 16:53:33,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 16:53:33,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 16:53:33,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 16:53:33,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 16:53:33,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 16:53:33,119 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 16:53:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 16:53:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 16:53:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 16:53:33,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 16:53:33,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 16:53:33,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 16:53:33,764 INFO L299 CfgBuilder]: Removed 16 assume(true) statements. [2020-12-23 16:53:33,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:33 BoogieIcfgContainer [2020-12-23 16:53:33,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 16:53:33,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 16:53:33,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 16:53:33,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 16:53:33,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 04:53:32" (1/3) ... [2020-12-23 16:53:33,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14febfe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:33, skipping insertion in model container [2020-12-23 16:53:33,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 04:53:32" (2/3) ... [2020-12-23 16:53:33,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14febfe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 04:53:33, skipping insertion in model container [2020-12-23 16:53:33,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 04:53:33" (3/3) ... [2020-12-23 16:53:33,780 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrstr-alloca-2.i [2020-12-23 16:53:33,786 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 16:53:33,792 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 25 error locations. [2020-12-23 16:53:33,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2020-12-23 16:53:33,836 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 16:53:33,836 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-23 16:53:33,836 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 16:53:33,836 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 16:53:33,836 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 16:53:33,836 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 16:53:33,837 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 16:53:33,837 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 16:53:33,853 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states. [2020-12-23 16:53:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:33,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:33,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:33,861 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:33,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:33,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-12-23 16:53:33,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:33,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964911274] [2020-12-23 16:53:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964911274] [2020-12-23 16:53:34,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:34,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:34,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648251888] [2020-12-23 16:53:34,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:34,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:34,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:34,096 INFO L87 Difference]: Start difference. First operand 79 states. Second operand 3 states. [2020-12-23 16:53:34,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:34,174 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-12-23 16:53:34,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:34,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-23 16:53:34,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:34,185 INFO L225 Difference]: With dead ends: 77 [2020-12-23 16:53:34,186 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 16:53:34,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:34,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 16:53:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-23 16:53:34,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:53:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-12-23 16:53:34,226 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 7 [2020-12-23 16:53:34,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:34,226 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-12-23 16:53:34,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:34,227 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-12-23 16:53:34,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-23 16:53:34,227 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:34,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:34,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 16:53:34,228 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029097, now seen corresponding path program 1 times [2020-12-23 16:53:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:34,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132460791] [2020-12-23 16:53:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:34,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132460791] [2020-12-23 16:53:34,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:34,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:34,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100633907] [2020-12-23 16:53:34,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:34,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:34,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:34,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:34,324 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 5 states. [2020-12-23 16:53:34,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:34,455 INFO L93 Difference]: Finished difference Result 79 states and 91 transitions. [2020-12-23 16:53:34,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:34,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-12-23 16:53:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:34,457 INFO L225 Difference]: With dead ends: 79 [2020-12-23 16:53:34,457 INFO L226 Difference]: Without dead ends: 79 [2020-12-23 16:53:34,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-23 16:53:34,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-12-23 16:53:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 16:53:34,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-12-23 16:53:34,468 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 7 [2020-12-23 16:53:34,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:34,468 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-12-23 16:53:34,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:34,468 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-12-23 16:53:34,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:34,469 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:34,469 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:34,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 16:53:34,470 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:34,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1906083540, now seen corresponding path program 1 times [2020-12-23 16:53:34,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:34,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293545181] [2020-12-23 16:53:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293545181] [2020-12-23 16:53:34,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636785334] [2020-12-23 16:53:34,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:53:34,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:34,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:34,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 16:53:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29386353] [2020-12-23 16:53:34,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:34,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:34,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:34,767 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 5 states. [2020-12-23 16:53:34,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:34,799 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-12-23 16:53:34,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:34,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-23 16:53:34,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:34,802 INFO L225 Difference]: With dead ends: 149 [2020-12-23 16:53:34,802 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 16:53:34,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:34,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 16:53:34,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 84. [2020-12-23 16:53:34,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-23 16:53:34,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 97 transitions. [2020-12-23 16:53:34,811 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 97 transitions. Word has length 11 [2020-12-23 16:53:34,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:34,812 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 97 transitions. [2020-12-23 16:53:34,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:34,812 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 97 transitions. [2020-12-23 16:53:34,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 16:53:34,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:34,813 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:35,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-23 16:53:35,028 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:35,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-12-23 16:53:35,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:35,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133255615] [2020-12-23 16:53:35,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133255615] [2020-12-23 16:53:35,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270600690] [2020-12-23 16:53:35,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 16:53:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:35,250 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_28|], 1=[|v_#valid_36|]} [2020-12-23 16:53:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:35,268 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 16:53:35,270 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,282 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,291 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 16:53:35,294 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:35,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:35,307 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 16:53:35,308 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:35,342 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:35,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:35,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 16:53:35,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164792996] [2020-12-23 16:53:35,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:35,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:35,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:35,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:35,345 INFO L87 Difference]: Start difference. First operand 84 states and 97 transitions. Second operand 6 states. [2020-12-23 16:53:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:35,456 INFO L93 Difference]: Finished difference Result 85 states and 98 transitions. [2020-12-23 16:53:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:35,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-23 16:53:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:35,457 INFO L225 Difference]: With dead ends: 85 [2020-12-23 16:53:35,457 INFO L226 Difference]: Without dead ends: 85 [2020-12-23 16:53:35,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:35,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-12-23 16:53:35,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-12-23 16:53:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 16:53:35,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2020-12-23 16:53:35,465 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 11 [2020-12-23 16:53:35,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:35,465 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2020-12-23 16:53:35,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2020-12-23 16:53:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:35,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:35,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:35,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:35,680 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265437, now seen corresponding path program 1 times [2020-12-23 16:53:35,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:35,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970042911] [2020-12-23 16:53:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:35,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:35,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970042911] [2020-12-23 16:53:35,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:35,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:35,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744411018] [2020-12-23 16:53:35,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:35,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:35,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:35,751 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand 4 states. [2020-12-23 16:53:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:35,779 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2020-12-23 16:53:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:35,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 16:53:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:35,781 INFO L225 Difference]: With dead ends: 88 [2020-12-23 16:53:35,781 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 16:53:35,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 16:53:35,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2020-12-23 16:53:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 16:53:35,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-12-23 16:53:35,797 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 13 [2020-12-23 16:53:35,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:35,798 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-12-23 16:53:35,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:35,798 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-12-23 16:53:35,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:35,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:35,799 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:35,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 16:53:35,799 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:35,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:35,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265385, now seen corresponding path program 1 times [2020-12-23 16:53:35,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:35,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776177099] [2020-12-23 16:53:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:35,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776177099] [2020-12-23 16:53:35,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:35,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 16:53:35,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492967660] [2020-12-23 16:53:35,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 16:53:35,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 16:53:35,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:35,868 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 3 states. [2020-12-23 16:53:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:35,911 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-23 16:53:35,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 16:53:35,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-12-23 16:53:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:35,912 INFO L225 Difference]: With dead ends: 81 [2020-12-23 16:53:35,912 INFO L226 Difference]: Without dead ends: 81 [2020-12-23 16:53:35,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 16:53:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-23 16:53:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-12-23 16:53:35,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 16:53:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-23 16:53:35,918 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2020-12-23 16:53:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:35,918 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-23 16:53:35,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 16:53:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-23 16:53:35,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 16:53:35,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:35,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:35,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 16:53:35,920 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:35,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:35,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2090265384, now seen corresponding path program 1 times [2020-12-23 16:53:35,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:35,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304357539] [2020-12-23 16:53:35,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304357539] [2020-12-23 16:53:35,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:35,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:35,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645861564] [2020-12-23 16:53:35,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:35,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:35,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:35,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:35,982 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 6 states. [2020-12-23 16:53:36,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:36,094 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-12-23 16:53:36,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:36,094 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-23 16:53:36,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:36,095 INFO L225 Difference]: With dead ends: 83 [2020-12-23 16:53:36,095 INFO L226 Difference]: Without dead ends: 83 [2020-12-23 16:53:36,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:36,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-23 16:53:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-12-23 16:53:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 16:53:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2020-12-23 16:53:36,101 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 13 [2020-12-23 16:53:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:36,101 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2020-12-23 16:53:36,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:36,101 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2020-12-23 16:53:36,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:36,102 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 16:53:36,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 16:53:36,103 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -862198810, now seen corresponding path program 1 times [2020-12-23 16:53:36,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:36,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235387716] [2020-12-23 16:53:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235387716] [2020-12-23 16:53:36,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156642267] [2020-12-23 16:53:36,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 16:53:36,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:36,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:36,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-12-23 16:53:36,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94359420] [2020-12-23 16:53:36,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:36,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:36,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:36,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:36,326 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand 8 states. [2020-12-23 16:53:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:36,537 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2020-12-23 16:53:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:36,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-23 16:53:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:36,538 INFO L225 Difference]: With dead ends: 144 [2020-12-23 16:53:36,539 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 16:53:36,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-23 16:53:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 16:53:36,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 89. [2020-12-23 16:53:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:53:36,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-12-23 16:53:36,544 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 17 [2020-12-23 16:53:36,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:36,544 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-12-23 16:53:36,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-12-23 16:53:36,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:36,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:36,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:36,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,761 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:36,762 INFO L82 PathProgramCache]: Analyzing trace with hash -862198757, now seen corresponding path program 1 times [2020-12-23 16:53:36,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:36,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021286006] [2020-12-23 16:53:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:36,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:36,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021286006] [2020-12-23 16:53:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019806498] [2020-12-23 16:53:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:36,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 16:53:36,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:36,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:36,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2020-12-23 16:53:36,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132591091] [2020-12-23 16:53:36,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:36,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:36,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:36,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:36,922 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 5 states. [2020-12-23 16:53:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:36,951 INFO L93 Difference]: Finished difference Result 170 states and 194 transitions. [2020-12-23 16:53:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:36,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-12-23 16:53:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:36,953 INFO L225 Difference]: With dead ends: 170 [2020-12-23 16:53:36,953 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 16:53:36,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 16:53:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2020-12-23 16:53:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 16:53:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2020-12-23 16:53:36,959 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 17 [2020-12-23 16:53:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:36,960 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2020-12-23 16:53:36,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2020-12-23 16:53:36,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:36,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:36,961 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:37,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:37,175 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1873316007, now seen corresponding path program 1 times [2020-12-23 16:53:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81338225] [2020-12-23 16:53:37,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:37,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81338225] [2020-12-23 16:53:37,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403961266] [2020-12-23 16:53:37,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:37,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 16:53:37,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:37,337 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:37,337 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 16:53:37,341 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:37,357 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:37,360 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 16:53:37,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:37,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:37,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:37,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 16:53:37,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449397314] [2020-12-23 16:53:37,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:37,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:37,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:37,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:37,402 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand 7 states. [2020-12-23 16:53:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:37,485 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2020-12-23 16:53:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:37,485 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 16:53:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:37,486 INFO L225 Difference]: With dead ends: 116 [2020-12-23 16:53:37,486 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 16:53:37,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:37,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 16:53:37,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-12-23 16:53:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 16:53:37,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2020-12-23 16:53:37,491 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 17 [2020-12-23 16:53:37,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:37,491 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2020-12-23 16:53:37,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:37,492 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2020-12-23 16:53:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 16:53:37,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:37,493 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 16:53:37,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-23 16:53:37,708 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash -2142062488, now seen corresponding path program 1 times [2020-12-23 16:53:37,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772021406] [2020-12-23 16:53:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772021406] [2020-12-23 16:53:37,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:37,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:37,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176851890] [2020-12-23 16:53:37,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 16:53:37,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:37,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 16:53:37,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:37,780 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand 7 states. [2020-12-23 16:53:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:37,859 INFO L93 Difference]: Finished difference Result 109 states and 124 transitions. [2020-12-23 16:53:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:37,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-12-23 16:53:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:37,861 INFO L225 Difference]: With dead ends: 109 [2020-12-23 16:53:37,861 INFO L226 Difference]: Without dead ends: 109 [2020-12-23 16:53:37,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:37,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-23 16:53:37,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-12-23 16:53:37,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-23 16:53:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-12-23 16:53:37,865 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 17 [2020-12-23 16:53:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:37,865 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-12-23 16:53:37,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 16:53:37,866 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-12-23 16:53:37,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:37,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:37,867 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] [2020-12-23 16:53:37,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 16:53:37,867 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1860324492, now seen corresponding path program 1 times [2020-12-23 16:53:37,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65488266] [2020-12-23 16:53:37,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:37,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65488266] [2020-12-23 16:53:37,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:37,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:37,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550565378] [2020-12-23 16:53:37,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:37,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:37,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:37,900 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 4 states. [2020-12-23 16:53:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:37,950 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-12-23 16:53:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:37,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-23 16:53:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:37,952 INFO L225 Difference]: With dead ends: 95 [2020-12-23 16:53:37,952 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:53:37,952 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 16:53:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:53:37,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-23 16:53:37,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 16:53:37,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-12-23 16:53:37,955 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 20 [2020-12-23 16:53:37,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:37,956 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-12-23 16:53:37,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:37,956 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-12-23 16:53:37,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 16:53:37,957 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:37,957 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] [2020-12-23 16:53:37,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 16:53:37,957 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:37,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:37,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1860324491, now seen corresponding path program 1 times [2020-12-23 16:53:37,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:37,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957968332] [2020-12-23 16:53:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:38,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957968332] [2020-12-23 16:53:38,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:38,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:38,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756738211] [2020-12-23 16:53:38,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:38,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:38,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:38,031 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 6 states. [2020-12-23 16:53:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:38,096 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2020-12-23 16:53:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:38,097 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-12-23 16:53:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:38,097 INFO L225 Difference]: With dead ends: 94 [2020-12-23 16:53:38,098 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 16:53:38,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 16:53:38,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-12-23 16:53:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 16:53:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2020-12-23 16:53:38,104 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 20 [2020-12-23 16:53:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:38,105 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2020-12-23 16:53:38,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2020-12-23 16:53:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:53:38,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:38,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:38,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 16:53:38,110 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1331077295, now seen corresponding path program 1 times [2020-12-23 16:53:38,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:38,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758215875] [2020-12-23 16:53:38,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:38,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758215875] [2020-12-23 16:53:38,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:38,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:38,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223715424] [2020-12-23 16:53:38,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:38,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:38,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:38,166 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand 5 states. [2020-12-23 16:53:38,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:38,224 INFO L93 Difference]: Finished difference Result 95 states and 109 transitions. [2020-12-23 16:53:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:38,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-23 16:53:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:38,225 INFO L225 Difference]: With dead ends: 95 [2020-12-23 16:53:38,225 INFO L226 Difference]: Without dead ends: 95 [2020-12-23 16:53:38,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:38,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-23 16:53:38,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-12-23 16:53:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:53:38,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 107 transitions. [2020-12-23 16:53:38,228 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 107 transitions. Word has length 23 [2020-12-23 16:53:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:38,229 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 107 transitions. [2020-12-23 16:53:38,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 107 transitions. [2020-12-23 16:53:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:53:38,230 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:38,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:38,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 16:53:38,230 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:38,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:38,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1331077296, now seen corresponding path program 1 times [2020-12-23 16:53:38,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:38,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997288131] [2020-12-23 16:53:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:38,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997288131] [2020-12-23 16:53:38,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:38,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-23 16:53:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903756124] [2020-12-23 16:53:38,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:38,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:38,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:38,373 INFO L87 Difference]: Start difference. First operand 93 states and 107 transitions. Second operand 8 states. [2020-12-23 16:53:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:38,609 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-12-23 16:53:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:38,610 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-12-23 16:53:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:38,611 INFO L225 Difference]: With dead ends: 107 [2020-12-23 16:53:38,611 INFO L226 Difference]: Without dead ends: 107 [2020-12-23 16:53:38,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-23 16:53:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-23 16:53:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2020-12-23 16:53:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 16:53:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2020-12-23 16:53:38,614 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 23 [2020-12-23 16:53:38,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:38,615 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2020-12-23 16:53:38,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2020-12-23 16:53:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 16:53:38,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:38,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:38,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 16:53:38,616 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash 513428846, now seen corresponding path program 1 times [2020-12-23 16:53:38,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:38,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679175010] [2020-12-23 16:53:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:38,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679175010] [2020-12-23 16:53:38,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050225966] [2020-12-23 16:53:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 16:53:38,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:38,964 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:53:38,965 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:38,967 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:38,968 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:38,968 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-23 16:53:39,000 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 16:53:39,001 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:39,003 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:39,004 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 16:53:39,004 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:39,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:39,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-12-23 16:53:39,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14025377] [2020-12-23 16:53:39,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:53:39,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:53:39,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:39,010 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand 16 states. [2020-12-23 16:53:39,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:39,495 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2020-12-23 16:53:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:53:39,495 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2020-12-23 16:53:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:39,496 INFO L225 Difference]: With dead ends: 120 [2020-12-23 16:53:39,496 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 16:53:39,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:53:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 16:53:39,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2020-12-23 16:53:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 16:53:39,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-12-23 16:53:39,500 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 23 [2020-12-23 16:53:39,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:39,501 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-12-23 16:53:39,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:53:39,501 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-12-23 16:53:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 16:53:39,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:39,502 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:39,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:39,703 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:39,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:39,704 INFO L82 PathProgramCache]: Analyzing trace with hash -731742098, now seen corresponding path program 1 times [2020-12-23 16:53:39,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:39,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311225292] [2020-12-23 16:53:39,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-23 16:53:39,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311225292] [2020-12-23 16:53:39,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:39,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 16:53:39,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352144507] [2020-12-23 16:53:39,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 16:53:39,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:39,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 16:53:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:39,775 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 4 states. [2020-12-23 16:53:39,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:39,811 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2020-12-23 16:53:39,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 16:53:39,811 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-12-23 16:53:39,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:39,812 INFO L225 Difference]: With dead ends: 102 [2020-12-23 16:53:39,812 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 16:53:39,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 16:53:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 16:53:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-23 16:53:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-23 16:53:39,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-12-23 16:53:39,814 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 25 [2020-12-23 16:53:39,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:39,815 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-12-23 16:53:39,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 16:53:39,815 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-12-23 16:53:39,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-23 16:53:39,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:39,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:39,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 16:53:39,816 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:39,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 510694897, now seen corresponding path program 2 times [2020-12-23 16:53:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:39,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954580818] [2020-12-23 16:53:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:39,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954580818] [2020-12-23 16:53:39,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325484801] [2020-12-23 16:53:39,917 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:39,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-12-23 16:53:39,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:39,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:53:39,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:40,031 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 16:53:40,031 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:40,037 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:40,039 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 16:53:40,040 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:40,159 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:40,159 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 20 treesize of output 20 [2020-12-23 16:53:40,161 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:40,172 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:40,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:53:40,181 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-23 16:53:40,184 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 16:53:40,184 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:25 [2020-12-23 16:53:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 16:53:40,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:40,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 14 [2020-12-23 16:53:40,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414354054] [2020-12-23 16:53:40,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 16:53:40,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:40,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 16:53:40,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:40,265 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 8 states. [2020-12-23 16:53:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:40,698 INFO L93 Difference]: Finished difference Result 114 states and 129 transitions. [2020-12-23 16:53:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:40,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-12-23 16:53:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:40,700 INFO L225 Difference]: With dead ends: 114 [2020-12-23 16:53:40,700 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 16:53:40,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 16:53:40,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 75. [2020-12-23 16:53:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 16:53:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2020-12-23 16:53:40,703 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 27 [2020-12-23 16:53:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:40,703 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2020-12-23 16:53:40,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 16:53:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2020-12-23 16:53:40,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 16:53:40,704 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:40,704 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 16:53:40,913 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1337529045, now seen corresponding path program 1 times [2020-12-23 16:53:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:40,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143018645] [2020-12-23 16:53:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:41,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143018645] [2020-12-23 16:53:41,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596246056] [2020-12-23 16:53:41,225 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:41,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:41,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:41,431 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 16:53:41,432 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:41,438 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:41,440 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 16:53:41,441 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:20 [2020-12-23 16:53:41,577 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:53:41,578 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:41,579 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2020-12-23 16:53:41,580 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:41,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:41,586 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 16:53:41,586 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:21, output treesize:3 [2020-12-23 16:53:41,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:41,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:41,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 24 [2020-12-23 16:53:41,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575863293] [2020-12-23 16:53:41,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:53:41,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:41,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:53:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:41,593 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand 24 states. [2020-12-23 16:53:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:42,530 INFO L93 Difference]: Finished difference Result 237 states and 265 transitions. [2020-12-23 16:53:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 16:53:42,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 30 [2020-12-23 16:53:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:42,533 INFO L225 Difference]: With dead ends: 237 [2020-12-23 16:53:42,534 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 16:53:42,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=1134, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:53:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 16:53:42,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 87. [2020-12-23 16:53:42,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 16:53:42,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-12-23 16:53:42,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 30 [2020-12-23 16:53:42,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:42,539 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-12-23 16:53:42,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:53:42,539 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-12-23 16:53:42,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:53:42,540 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:42,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:42,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:42,755 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:42,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1863084157, now seen corresponding path program 1 times [2020-12-23 16:53:42,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:42,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99227009] [2020-12-23 16:53:42,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:42,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99227009] [2020-12-23 16:53:42,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:42,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:42,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795252583] [2020-12-23 16:53:42,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:42,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:42,818 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 5 states. [2020-12-23 16:53:42,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:42,868 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2020-12-23 16:53:42,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:42,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-12-23 16:53:42,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:42,870 INFO L225 Difference]: With dead ends: 86 [2020-12-23 16:53:42,870 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 16:53:42,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-23 16:53:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 16:53:42,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-23 16:53:42,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-23 16:53:42,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2020-12-23 16:53:42,874 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 33 [2020-12-23 16:53:42,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:42,875 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2020-12-23 16:53:42,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2020-12-23 16:53:42,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-23 16:53:42,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:42,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:42,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 16:53:42,876 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1863084158, now seen corresponding path program 1 times [2020-12-23 16:53:42,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:42,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893485505] [2020-12-23 16:53:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893485505] [2020-12-23 16:53:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274861742] [2020-12-23 16:53:42,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:43,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:53:43,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:43,056 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_30|], 1=[|v_#valid_37|]} [2020-12-23 16:53:43,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:43,060 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 16:53:43,061 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,067 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:43,071 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 16:53:43,072 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,079 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:43,080 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:43,081 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:24, output treesize:9 [2020-12-23 16:53:43,118 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 16:53:43,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 16:53:43,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2020-12-23 16:53:43,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097480303] [2020-12-23 16:53:43,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:43,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:43,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-12-23 16:53:43,120 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand 6 states. [2020-12-23 16:53:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:43,210 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2020-12-23 16:53:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:43,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-12-23 16:53:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:43,211 INFO L225 Difference]: With dead ends: 91 [2020-12-23 16:53:43,211 INFO L226 Difference]: Without dead ends: 91 [2020-12-23 16:53:43,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-23 16:53:43,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-23 16:53:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2020-12-23 16:53:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 16:53:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-12-23 16:53:43,214 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 33 [2020-12-23 16:53:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:43,214 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-12-23 16:53:43,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-12-23 16:53:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 16:53:43,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:43,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:43,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,429 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:43,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:43,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1878769906, now seen corresponding path program 2 times [2020-12-23 16:53:43,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:43,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538125425] [2020-12-23 16:53:43,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:43,578 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 16:53:43,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538125425] [2020-12-23 16:53:43,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289208973] [2020-12-23 16:53:43,579 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:43,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:43,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:43,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:43,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 17 [2020-12-23 16:53:43,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092183787] [2020-12-23 16:53:43,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:53:43,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:43,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:53:43,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:43,773 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 18 states. [2020-12-23 16:53:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:44,154 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2020-12-23 16:53:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:44,154 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-23 16:53:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:44,155 INFO L225 Difference]: With dead ends: 211 [2020-12-23 16:53:44,155 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 16:53:44,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 16:53:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 92. [2020-12-23 16:53:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 16:53:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2020-12-23 16:53:44,159 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 34 [2020-12-23 16:53:44,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:44,160 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2020-12-23 16:53:44,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:53:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2020-12-23 16:53:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-23 16:53:44,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:44,160 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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 16:53:44,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:44,372 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:44,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1579516876, now seen corresponding path program 3 times [2020-12-23 16:53:44,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:44,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564341520] [2020-12-23 16:53:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-23 16:53:44,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564341520] [2020-12-23 16:53:44,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336727219] [2020-12-23 16:53:44,564 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:44,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:44,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 16:53:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:44,677 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,678 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 16:53:44,679 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,694 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-12-23 16:53:44,697 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 16:53:44,697 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-12-23 16:53:44,744 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:53:44,745 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,750 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,751 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,751 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-12-23 16:53:44,864 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,865 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-12-23 16:53:44,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:44,875 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:44,876 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:44,876 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:23 [2020-12-23 16:53:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-23 16:53:44,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:44,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 23 [2020-12-23 16:53:44,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227138267] [2020-12-23 16:53:44,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 16:53:44,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 16:53:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:44,971 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand 23 states. [2020-12-23 16:53:47,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:47,022 INFO L93 Difference]: Finished difference Result 264 states and 298 transitions. [2020-12-23 16:53:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:53:47,022 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 37 [2020-12-23 16:53:47,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:47,024 INFO L225 Difference]: With dead ends: 264 [2020-12-23 16:53:47,024 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 16:53:47,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 16:53:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 16:53:47,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 100. [2020-12-23 16:53:47,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 16:53:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 112 transitions. [2020-12-23 16:53:47,029 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 112 transitions. Word has length 37 [2020-12-23 16:53:47,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:47,029 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 112 transitions. [2020-12-23 16:53:47,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 16:53:47,029 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 112 transitions. [2020-12-23 16:53:47,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 16:53:47,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:47,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:47,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-23 16:53:47,254 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:47,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1768471691, now seen corresponding path program 1 times [2020-12-23 16:53:47,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:47,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716046715] [2020-12-23 16:53:47,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-23 16:53:47,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716046715] [2020-12-23 16:53:47,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:47,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-23 16:53:47,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63601182] [2020-12-23 16:53:47,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 16:53:47,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:47,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 16:53:47,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:47,394 INFO L87 Difference]: Start difference. First operand 100 states and 112 transitions. Second operand 9 states. [2020-12-23 16:53:47,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:47,580 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-23 16:53:47,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 16:53:47,581 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-12-23 16:53:47,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:47,581 INFO L225 Difference]: With dead ends: 151 [2020-12-23 16:53:47,581 INFO L226 Difference]: Without dead ends: 93 [2020-12-23 16:53:47,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-23 16:53:47,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-23 16:53:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-12-23 16:53:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 16:53:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 104 transitions. [2020-12-23 16:53:47,584 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 104 transitions. Word has length 38 [2020-12-23 16:53:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:47,585 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 104 transitions. [2020-12-23 16:53:47,585 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 16:53:47,585 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 104 transitions. [2020-12-23 16:53:47,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 16:53:47,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:47,585 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:47,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 16:53:47,586 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:47,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:47,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1374104905, now seen corresponding path program 1 times [2020-12-23 16:53:47,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:47,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47024291] [2020-12-23 16:53:47,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:47,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47024291] [2020-12-23 16:53:47,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285494728] [2020-12-23 16:53:47,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:47,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 16:53:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:47,859 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 16:53:47,862 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,867 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:53:47,944 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:53:47,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,950 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,952 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 16:53:47,952 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:53:47,984 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:53:47,985 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:47,993 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:47,996 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:47,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:53:48,184 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:48,185 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-23 16:53:48,187 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:53:48,198 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:53:48,200 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:53:48,200 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:53:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:48,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:48,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2020-12-23 16:53:48,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44820407] [2020-12-23 16:53:48,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 16:53:48,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:48,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 16:53:48,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-23 16:53:48,213 INFO L87 Difference]: Start difference. First operand 93 states and 104 transitions. Second operand 18 states. [2020-12-23 16:53:48,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:48,864 INFO L93 Difference]: Finished difference Result 151 states and 167 transitions. [2020-12-23 16:53:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:53:48,864 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-12-23 16:53:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:48,865 INFO L225 Difference]: With dead ends: 151 [2020-12-23 16:53:48,865 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 16:53:48,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:53:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 16:53:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-12-23 16:53:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 16:53:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2020-12-23 16:53:48,870 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 38 [2020-12-23 16:53:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:48,870 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2020-12-23 16:53:48,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 16:53:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2020-12-23 16:53:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 16:53:48,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:48,871 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:49,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 16:53:49,086 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:49,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:49,087 INFO L82 PathProgramCache]: Analyzing trace with hash 514562726, now seen corresponding path program 2 times [2020-12-23 16:53:49,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:49,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589505233] [2020-12-23 16:53:49,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589505233] [2020-12-23 16:53:49,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449934777] [2020-12-23 16:53:49,190 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:49,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:53:49,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 16:53:49,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:49,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:49,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:49,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2020-12-23 16:53:49,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370471790] [2020-12-23 16:53:49,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:49,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:49,373 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand 15 states. [2020-12-23 16:53:49,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:49,724 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2020-12-23 16:53:49,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:49,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-12-23 16:53:49,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:49,726 INFO L225 Difference]: With dead ends: 133 [2020-12-23 16:53:49,726 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 16:53:49,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:53:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 16:53:49,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2020-12-23 16:53:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 16:53:49,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 146 transitions. [2020-12-23 16:53:49,730 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 146 transitions. Word has length 42 [2020-12-23 16:53:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:49,731 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 146 transitions. [2020-12-23 16:53:49,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 146 transitions. [2020-12-23 16:53:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:53:49,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:49,732 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:49,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 16:53:49,946 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:49,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1228465231, now seen corresponding path program 1 times [2020-12-23 16:53:49,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:49,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972464836] [2020-12-23 16:53:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 16:53:50,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972464836] [2020-12-23 16:53:50,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:50,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 16:53:50,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706229777] [2020-12-23 16:53:50,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 16:53:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 16:53:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-23 16:53:50,018 INFO L87 Difference]: Start difference. First operand 120 states and 146 transitions. Second operand 5 states. [2020-12-23 16:53:50,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:50,074 INFO L93 Difference]: Finished difference Result 127 states and 152 transitions. [2020-12-23 16:53:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 16:53:50,074 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-23 16:53:50,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:50,075 INFO L225 Difference]: With dead ends: 127 [2020-12-23 16:53:50,075 INFO L226 Difference]: Without dead ends: 127 [2020-12-23 16:53:50,076 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 16:53:50,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-23 16:53:50,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2020-12-23 16:53:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 16:53:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2020-12-23 16:53:50,080 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 43 [2020-12-23 16:53:50,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:50,081 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2020-12-23 16:53:50,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 16:53:50,081 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2020-12-23 16:53:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-23 16:53:50,082 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:50,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:50,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 16:53:50,083 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:50,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:50,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1228465230, now seen corresponding path program 1 times [2020-12-23 16:53:50,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:50,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574105472] [2020-12-23 16:53:50,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574105472] [2020-12-23 16:53:50,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671291118] [2020-12-23 16:53:50,196 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:50,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 16:53:50,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:50,275 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_32|], 1=[|v_#valid_39|]} [2020-12-23 16:53:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:53:50,279 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 16:53:50,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:50,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:50,291 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 16:53:50,293 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:50,300 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:50,301 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 16:53:50,302 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:53:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:50,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:50,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 16:53:50,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006786763] [2020-12-23 16:53:50,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:53:50,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:50,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:53:50,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:50,460 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand 16 states. [2020-12-23 16:53:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:50,918 INFO L93 Difference]: Finished difference Result 150 states and 168 transitions. [2020-12-23 16:53:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:50,918 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-12-23 16:53:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:50,920 INFO L225 Difference]: With dead ends: 150 [2020-12-23 16:53:50,920 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 16:53:50,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:53:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 16:53:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2020-12-23 16:53:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 16:53:50,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2020-12-23 16:53:50,924 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 43 [2020-12-23 16:53:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:50,924 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2020-12-23 16:53:50,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:53:50,925 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2020-12-23 16:53:50,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 16:53:50,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:50,925 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:51,139 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,140 INFO L82 PathProgramCache]: Analyzing trace with hash 560922322, now seen corresponding path program 1 times [2020-12-23 16:53:51,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845347446] [2020-12-23 16:53:51,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:53:51,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845347446] [2020-12-23 16:53:51,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:51,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:51,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880184301] [2020-12-23 16:53:51,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:51,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:51,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:51,181 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand 6 states. [2020-12-23 16:53:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:51,266 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2020-12-23 16:53:51,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:51,266 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-12-23 16:53:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:51,267 INFO L225 Difference]: With dead ends: 133 [2020-12-23 16:53:51,267 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 16:53:51,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:51,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 16:53:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 122. [2020-12-23 16:53:51,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 16:53:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2020-12-23 16:53:51,298 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 45 [2020-12-23 16:53:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:51,299 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2020-12-23 16:53:51,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2020-12-23 16:53:51,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-23 16:53:51,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:51,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:51,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-12-23 16:53:51,300 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:51,300 INFO L82 PathProgramCache]: Analyzing trace with hash 560922323, now seen corresponding path program 1 times [2020-12-23 16:53:51,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:51,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956000275] [2020-12-23 16:53:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:51,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956000275] [2020-12-23 16:53:51,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323763904] [2020-12-23 16:53:51,453 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:51,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 16:53:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:51,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:51,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2020-12-23 16:53:51,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366590793] [2020-12-23 16:53:51,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:51,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:51,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:51,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:51,631 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand 15 states. [2020-12-23 16:53:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:51,903 INFO L93 Difference]: Finished difference Result 142 states and 168 transitions. [2020-12-23 16:53:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 16:53:51,903 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2020-12-23 16:53:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:51,904 INFO L225 Difference]: With dead ends: 142 [2020-12-23 16:53:51,904 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 16:53:51,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:53:51,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 16:53:51,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 125. [2020-12-23 16:53:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 16:53:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 150 transitions. [2020-12-23 16:53:51,909 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 150 transitions. Word has length 45 [2020-12-23 16:53:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:51,909 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 150 transitions. [2020-12-23 16:53:51,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 150 transitions. [2020-12-23 16:53:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:51,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:51,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:52,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:52,119 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:52,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2119524429, now seen corresponding path program 1 times [2020-12-23 16:53:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:52,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826959399] [2020-12-23 16:53:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-23 16:53:52,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826959399] [2020-12-23 16:53:52,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:52,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:52,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737914012] [2020-12-23 16:53:52,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:52,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:52,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:52,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:52,166 INFO L87 Difference]: Start difference. First operand 125 states and 150 transitions. Second operand 6 states. [2020-12-23 16:53:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:52,240 INFO L93 Difference]: Finished difference Result 133 states and 158 transitions. [2020-12-23 16:53:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:52,240 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-12-23 16:53:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:52,241 INFO L225 Difference]: With dead ends: 133 [2020-12-23 16:53:52,241 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 16:53:52,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 16:53:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 124. [2020-12-23 16:53:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-12-23 16:53:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2020-12-23 16:53:52,245 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 47 [2020-12-23 16:53:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:52,246 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2020-12-23 16:53:52,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2020-12-23 16:53:52,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:52,247 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:52,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-12-23 16:53:52,248 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2119524428, now seen corresponding path program 1 times [2020-12-23 16:53:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126151490] [2020-12-23 16:53:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:52,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:52,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126151490] [2020-12-23 16:53:52,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332910235] [2020-12-23 16:53:52,390 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 16:53:52,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:52,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:52,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-12-23 16:53:52,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065880327] [2020-12-23 16:53:52,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 16:53:52,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:52,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 16:53:52,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-12-23 16:53:52,569 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand 15 states. [2020-12-23 16:53:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:53,007 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-12-23 16:53:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:53,007 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 47 [2020-12-23 16:53:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:53,008 INFO L225 Difference]: With dead ends: 150 [2020-12-23 16:53:53,008 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 16:53:53,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=358, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:53:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 16:53:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 125. [2020-12-23 16:53:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 16:53:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2020-12-23 16:53:53,012 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 47 [2020-12-23 16:53:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:53,012 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2020-12-23 16:53:53,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 16:53:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2020-12-23 16:53:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-23 16:53:53,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:53,013 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:53,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:53,225 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:53,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:53,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1002087267, now seen corresponding path program 3 times [2020-12-23 16:53:53,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:53,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808074792] [2020-12-23 16:53:53,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808074792] [2020-12-23 16:53:53,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875719847] [2020-12-23 16:53:53,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:53:53,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:53:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 16:53:53,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:53,702 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:53,702 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 16:53:53,703 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:53,723 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:53:53,724 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 16:53:53,725 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:15 [2020-12-23 16:53:54,037 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 16:53:54,038 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:54,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,051 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 16:53:54,051 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2020-12-23 16:53:54,127 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,127 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 27 treesize of output 69 [2020-12-23 16:53:54,129 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:54,160 INFO L625 ElimStorePlain]: treesize reduction 39, result has 50.6 percent of original size [2020-12-23 16:53:54,161 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 16:53:54,162 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:40 [2020-12-23 16:53:54,353 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 16:53:54,354 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 16:53:54,365 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,367 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:53:54,367 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:35 [2020-12-23 16:53:54,582 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 16:53:54,583 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:53:54,585 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:53:54,585 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 16:53:54,585 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2020-12-23 16:53:54,604 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:53:54,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:54,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 29 [2020-12-23 16:53:54,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449191870] [2020-12-23 16:53:54,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 16:53:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 16:53:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=740, Unknown=0, NotChecked=0, Total=812 [2020-12-23 16:53:54,606 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand 29 states. [2020-12-23 16:53:55,928 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-12-23 16:53:57,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:57,452 INFO L93 Difference]: Finished difference Result 262 states and 302 transitions. [2020-12-23 16:53:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 16:53:57,453 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 47 [2020-12-23 16:53:57,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:57,454 INFO L225 Difference]: With dead ends: 262 [2020-12-23 16:53:57,454 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 16:53:57,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=463, Invalid=2399, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:53:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 16:53:57,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 200. [2020-12-23 16:53:57,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-23 16:53:57,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 237 transitions. [2020-12-23 16:53:57,460 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 237 transitions. Word has length 47 [2020-12-23 16:53:57,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:57,461 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 237 transitions. [2020-12-23 16:53:57,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 16:53:57,461 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 237 transitions. [2020-12-23 16:53:57,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:53:57,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:57,462 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:57,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 16:53:57,678 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:57,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:57,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1048782252, now seen corresponding path program 1 times [2020-12-23 16:53:57,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:57,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633382577] [2020-12-23 16:53:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-23 16:53:57,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633382577] [2020-12-23 16:53:57,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:57,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-23 16:53:57,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561393447] [2020-12-23 16:53:57,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:57,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:57,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:57,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:57,722 INFO L87 Difference]: Start difference. First operand 200 states and 237 transitions. Second operand 6 states. [2020-12-23 16:53:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:57,786 INFO L93 Difference]: Finished difference Result 212 states and 248 transitions. [2020-12-23 16:53:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:57,786 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-12-23 16:53:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:57,789 INFO L225 Difference]: With dead ends: 212 [2020-12-23 16:53:57,789 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 16:53:57,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 16:53:57,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 199. [2020-12-23 16:53:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 16:53:57,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 234 transitions. [2020-12-23 16:53:57,795 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 234 transitions. Word has length 49 [2020-12-23 16:53:57,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:57,795 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 234 transitions. [2020-12-23 16:53:57,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:57,796 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 234 transitions. [2020-12-23 16:53:57,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-23 16:53:57,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:57,796 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:57,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-23 16:53:57,797 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1048782251, now seen corresponding path program 1 times [2020-12-23 16:53:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:57,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773435444] [2020-12-23 16:53:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:57,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:57,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773435444] [2020-12-23 16:53:57,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095476298] [2020-12-23 16:53:57,945 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 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 16:53:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:58,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:53:58,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:58,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:58,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2020-12-23 16:53:58,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244723722] [2020-12-23 16:53:58,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:53:58,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:58,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:53:58,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:53:58,124 INFO L87 Difference]: Start difference. First operand 199 states and 234 transitions. Second operand 16 states. [2020-12-23 16:53:58,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:58,481 INFO L93 Difference]: Finished difference Result 261 states and 303 transitions. [2020-12-23 16:53:58,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:58,481 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2020-12-23 16:53:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:58,485 INFO L225 Difference]: With dead ends: 261 [2020-12-23 16:53:58,485 INFO L226 Difference]: Without dead ends: 258 [2020-12-23 16:53:58,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:53:58,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-23 16:53:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 204. [2020-12-23 16:53:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-23 16:53:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 240 transitions. [2020-12-23 16:53:58,492 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 240 transitions. Word has length 49 [2020-12-23 16:53:58,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:58,493 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 240 transitions. [2020-12-23 16:53:58,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:53:58,493 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 240 transitions. [2020-12-23 16:53:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:53:58,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:58,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:58,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 16:53:58,701 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:58,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:58,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1733532468, now seen corresponding path program 1 times [2020-12-23 16:53:58,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:58,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972801845] [2020-12-23 16:53:58,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:58,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-23 16:53:58,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972801845] [2020-12-23 16:53:58,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 16:53:58,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-23 16:53:58,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819784447] [2020-12-23 16:53:58,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 16:53:58,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:58,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 16:53:58,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-23 16:53:58,783 INFO L87 Difference]: Start difference. First operand 204 states and 240 transitions. Second operand 6 states. [2020-12-23 16:53:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:58,838 INFO L93 Difference]: Finished difference Result 259 states and 299 transitions. [2020-12-23 16:53:58,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 16:53:58,838 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 51 [2020-12-23 16:53:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:58,840 INFO L225 Difference]: With dead ends: 259 [2020-12-23 16:53:58,840 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 16:53:58,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 16:53:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 16:53:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 229. [2020-12-23 16:53:58,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-23 16:53:58,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 267 transitions. [2020-12-23 16:53:58,846 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 267 transitions. Word has length 51 [2020-12-23 16:53:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:58,846 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 267 transitions. [2020-12-23 16:53:58,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 16:53:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 267 transitions. [2020-12-23 16:53:58,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-23 16:53:58,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:58,847 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:53:58,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-12-23 16:53:58,847 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:58,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:58,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1890652506, now seen corresponding path program 4 times [2020-12-23 16:53:58,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:58,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463985065] [2020-12-23 16:53:58,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:53:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463985065] [2020-12-23 16:53:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320736107] [2020-12-23 16:53:58,986 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 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 16:53:59,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:53:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:53:59,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 16:53:59,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:53:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:53:59,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:53:59,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 16:53:59,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334322662] [2020-12-23 16:53:59,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:53:59,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:53:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:53:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:53:59,183 INFO L87 Difference]: Start difference. First operand 229 states and 267 transitions. Second operand 17 states. [2020-12-23 16:53:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:53:59,668 INFO L93 Difference]: Finished difference Result 289 states and 326 transitions. [2020-12-23 16:53:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 16:53:59,668 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-12-23 16:53:59,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:53:59,673 INFO L225 Difference]: With dead ends: 289 [2020-12-23 16:53:59,673 INFO L226 Difference]: Without dead ends: 289 [2020-12-23 16:53:59,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-12-23 16:53:59,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-12-23 16:53:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 269. [2020-12-23 16:53:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-12-23 16:53:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 321 transitions. [2020-12-23 16:53:59,681 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 321 transitions. Word has length 51 [2020-12-23 16:53:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:53:59,681 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 321 transitions. [2020-12-23 16:53:59,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:53:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 321 transitions. [2020-12-23 16:53:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 16:53:59,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:53:59,682 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 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 16:53:59,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 16:53:59,897 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:53:59,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:53:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash 269209443, now seen corresponding path program 5 times [2020-12-23 16:53:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:53:59,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649539391] [2020-12-23 16:53:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:53:59,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 16:54:00,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649539391] [2020-12-23 16:54:00,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400141099] [2020-12-23 16:54:00,608 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 16:54:00,700 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 16:54:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:00,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 16:54:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:00,774 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 16:54:00,775 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,779 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,780 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,780 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:10 [2020-12-23 16:54:00,966 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 16:54:00,967 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:00,975 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:00,977 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 16:54:00,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 16:54:01,048 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:01,049 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 16:54:01,051 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:01,078 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-23 16:54:01,079 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 16:54:01,079 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-23 16:54:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:01,912 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:01,966 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-23 16:54:01,966 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 38 treesize of output 65 [2020-12-23 16:54:01,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:01,978 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:01,981 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 16:54:01,982 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:3 [2020-12-23 16:54:02,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:02,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:02,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2020-12-23 16:54:02,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031229909] [2020-12-23 16:54:02,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 16:54:02,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 16:54:02,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1383, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 16:54:02,014 INFO L87 Difference]: Start difference. First operand 269 states and 321 transitions. Second operand 39 states. [2020-12-23 16:54:03,689 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-12-23 16:54:04,477 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2020-12-23 16:54:05,123 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-12-23 16:54:05,924 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-12-23 16:54:06,114 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-12-23 16:54:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:08,538 INFO L93 Difference]: Finished difference Result 528 states and 604 transitions. [2020-12-23 16:54:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 16:54:08,539 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 56 [2020-12-23 16:54:08,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:08,542 INFO L225 Difference]: With dead ends: 528 [2020-12-23 16:54:08,542 INFO L226 Difference]: Without dead ends: 416 [2020-12-23 16:54:08,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1107, Invalid=6725, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 16:54:08,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-12-23 16:54:08,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 359. [2020-12-23 16:54:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-12-23 16:54:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 428 transitions. [2020-12-23 16:54:08,552 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 428 transitions. Word has length 56 [2020-12-23 16:54:08,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:08,553 INFO L481 AbstractCegarLoop]: Abstraction has 359 states and 428 transitions. [2020-12-23 16:54:08,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 16:54:08,553 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 428 transitions. [2020-12-23 16:54:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 16:54:08,554 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:08,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:08,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 16:54:08,770 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:08,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:08,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2081403787, now seen corresponding path program 1 times [2020-12-23 16:54:08,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:08,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640265160] [2020-12-23 16:54:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:08,877 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-23 16:54:08,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640265160] [2020-12-23 16:54:08,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984938772] [2020-12-23 16:54:08,877 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:54:08,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:08,971 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:08,973 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:08,976 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:08,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:08,977 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:54:09,078 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:09,079 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:09,087 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:09,088 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 16:54:09,088 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:54:09,123 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:54:09,124 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:09,132 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:09,133 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:09,134 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:54:09,509 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:09,509 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-23 16:54:09,511 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:54:09,522 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:54:09,525 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:09,525 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:54:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:54:09,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:09,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 20 [2020-12-23 16:54:09,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520291183] [2020-12-23 16:54:09,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:54:09,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:09,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:54:09,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:54:09,573 INFO L87 Difference]: Start difference. First operand 359 states and 428 transitions. Second operand 20 states. [2020-12-23 16:54:14,498 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-23 16:54:18,746 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 16:54:22,859 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2020-12-23 16:54:27,071 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-12-23 16:54:31,228 WARN L197 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-12-23 16:54:35,324 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 16:54:39,467 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-12-23 16:54:43,629 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-12-23 16:54:43,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:43,693 INFO L93 Difference]: Finished difference Result 546 states and 634 transitions. [2020-12-23 16:54:43,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 16:54:43,694 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2020-12-23 16:54:43,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:43,696 INFO L225 Difference]: With dead ends: 546 [2020-12-23 16:54:43,696 INFO L226 Difference]: Without dead ends: 467 [2020-12-23 16:54:43,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 33.8s TimeCoverageRelationStatistics Valid=280, Invalid=1280, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 16:54:43,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-12-23 16:54:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 422. [2020-12-23 16:54:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2020-12-23 16:54:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 510 transitions. [2020-12-23 16:54:43,705 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 510 transitions. Word has length 58 [2020-12-23 16:54:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:43,706 INFO L481 AbstractCegarLoop]: Abstraction has 422 states and 510 transitions. [2020-12-23 16:54:43,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:54:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 510 transitions. [2020-12-23 16:54:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-23 16:54:43,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:43,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:43,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 16:54:43,921 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:43,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:43,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2033507871, now seen corresponding path program 1 times [2020-12-23 16:54:43,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:43,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70230983] [2020-12-23 16:54:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:44,074 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:54:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70230983] [2020-12-23 16:54:44,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605376589] [2020-12-23 16:54:44,074 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:44,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 16:54:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:54:44,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:44,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-12-23 16:54:44,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488044739] [2020-12-23 16:54:44,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 16:54:44,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:44,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 16:54:44,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-12-23 16:54:44,304 INFO L87 Difference]: Start difference. First operand 422 states and 510 transitions. Second operand 17 states. [2020-12-23 16:54:44,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:44,796 INFO L93 Difference]: Finished difference Result 464 states and 540 transitions. [2020-12-23 16:54:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 16:54:44,797 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-12-23 16:54:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:44,800 INFO L225 Difference]: With dead ends: 464 [2020-12-23 16:54:44,800 INFO L226 Difference]: Without dead ends: 463 [2020-12-23 16:54:44,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:54:44,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-23 16:54:44,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 421. [2020-12-23 16:54:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-12-23 16:54:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 501 transitions. [2020-12-23 16:54:44,810 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 501 transitions. Word has length 59 [2020-12-23 16:54:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:44,811 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 501 transitions. [2020-12-23 16:54:44,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 16:54:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 501 transitions. [2020-12-23 16:54:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 16:54:44,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:44,812 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 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 16:54:45,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:45,026 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:45,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:45,026 INFO L82 PathProgramCache]: Analyzing trace with hash -162234496, now seen corresponding path program 6 times [2020-12-23 16:54:45,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:45,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444291174] [2020-12-23 16:54:45,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:45,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:45,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444291174] [2020-12-23 16:54:45,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115594809] [2020-12-23 16:54:45,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:45,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-23 16:54:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:45,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 16:54:45,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:45,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:45,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2020-12-23 16:54:45,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344134624] [2020-12-23 16:54:45,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:54:45,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:45,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:54:45,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:54:45,485 INFO L87 Difference]: Start difference. First operand 421 states and 501 transitions. Second operand 20 states. [2020-12-23 16:54:46,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:46,198 INFO L93 Difference]: Finished difference Result 511 states and 591 transitions. [2020-12-23 16:54:46,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:54:46,198 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 60 [2020-12-23 16:54:46,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:46,201 INFO L225 Difference]: With dead ends: 511 [2020-12-23 16:54:46,202 INFO L226 Difference]: Without dead ends: 511 [2020-12-23 16:54:46,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2020-12-23 16:54:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-12-23 16:54:46,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 484. [2020-12-23 16:54:46,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-12-23 16:54:46,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 584 transitions. [2020-12-23 16:54:46,212 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 584 transitions. Word has length 60 [2020-12-23 16:54:46,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:46,212 INFO L481 AbstractCegarLoop]: Abstraction has 484 states and 584 transitions. [2020-12-23 16:54:46,212 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:54:46,213 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 584 transitions. [2020-12-23 16:54:46,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-23 16:54:46,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:46,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:46,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 16:54:46,427 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:46,427 INFO L82 PathProgramCache]: Analyzing trace with hash 114423395, now seen corresponding path program 1 times [2020-12-23 16:54:46,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:46,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63449054] [2020-12-23 16:54:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:54:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63449054] [2020-12-23 16:54:46,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237291667] [2020-12-23 16:54:46,602 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:46,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 16:54:46,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-23 16:54:46,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:46,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2020-12-23 16:54:46,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027587602] [2020-12-23 16:54:46,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 16:54:46,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:46,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 16:54:46,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-12-23 16:54:46,792 INFO L87 Difference]: Start difference. First operand 484 states and 584 transitions. Second operand 16 states. [2020-12-23 16:54:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:47,557 INFO L93 Difference]: Finished difference Result 588 states and 681 transitions. [2020-12-23 16:54:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 16:54:47,558 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-12-23 16:54:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:47,560 INFO L225 Difference]: With dead ends: 588 [2020-12-23 16:54:47,560 INFO L226 Difference]: Without dead ends: 539 [2020-12-23 16:54:47,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=774, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2020-12-23 16:54:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 435. [2020-12-23 16:54:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-23 16:54:47,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 515 transitions. [2020-12-23 16:54:47,571 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 515 transitions. Word has length 63 [2020-12-23 16:54:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:47,571 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 515 transitions. [2020-12-23 16:54:47,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 16:54:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 515 transitions. [2020-12-23 16:54:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-23 16:54:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:47,572 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 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 16:54:47,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:47,787 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:47,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:47,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1912649417, now seen corresponding path program 7 times [2020-12-23 16:54:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:47,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88128035] [2020-12-23 16:54:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:48,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88128035] [2020-12-23 16:54:48,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623052390] [2020-12-23 16:54:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 16:54:48,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:48,282 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:48,283 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:48,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:48,289 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:48,289 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:54:48,543 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:54:48,544 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:48,556 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:48,560 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 16:54:48,560 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:54:48,619 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:54:48,621 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:48,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:48,635 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 16:54:48,635 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:38, output treesize:34 [2020-12-23 16:54:49,388 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:49,389 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-23 16:54:49,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:49,401 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:49,404 INFO L547 ElimStorePlain]: Start of recursive call 1: 7 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:49,404 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 8 variables, input treesize:49, output treesize:3 [2020-12-23 16:54:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:54:49,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:49,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2020-12-23 16:54:49,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231936996] [2020-12-23 16:54:49,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:54:49,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:49,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:54:49,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=977, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:54:49,452 INFO L87 Difference]: Start difference. First operand 435 states and 515 transitions. Second operand 33 states. [2020-12-23 16:54:51,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:51,844 INFO L93 Difference]: Finished difference Result 720 states and 832 transitions. [2020-12-23 16:54:51,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 16:54:51,845 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2020-12-23 16:54:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:51,847 INFO L225 Difference]: With dead ends: 720 [2020-12-23 16:54:51,847 INFO L226 Difference]: Without dead ends: 644 [2020-12-23 16:54:51,847 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=281, Invalid=2169, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 16:54:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2020-12-23 16:54:51,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 611. [2020-12-23 16:54:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-23 16:54:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 723 transitions. [2020-12-23 16:54:51,876 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 723 transitions. Word has length 65 [2020-12-23 16:54:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:51,879 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 723 transitions. [2020-12-23 16:54:51,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:54:51,879 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 723 transitions. [2020-12-23 16:54:51,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 16:54:51,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:51,880 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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, 1, 1, 1, 1] [2020-12-23 16:54:52,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 16:54:52,096 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:52,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:52,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1370877155, now seen corresponding path program 2 times [2020-12-23 16:54:52,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:52,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897444677] [2020-12-23 16:54:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 35 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:54:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897444677] [2020-12-23 16:54:52,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919264053] [2020-12-23 16:54:52,286 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:52,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 16:54:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:52,392 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,393 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 16:54:52,393 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,417 INFO L625 ElimStorePlain]: treesize reduction 10, result has 70.6 percent of original size [2020-12-23 16:54:52,418 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,418 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:24 [2020-12-23 16:54:52,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:52,644 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:52,645 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,650 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-12-23 16:54:52,650 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:52,671 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:52,672 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 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 1 variables, input treesize:55, output treesize:47 [2020-12-23 16:54:52,896 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 16:54:52,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,329 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 5, 1] term [2020-12-23 16:54:53,330 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,332 INFO L398 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 4, 1] term [2020-12-23 16:54:53,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 16:54:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:53,355 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,356 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 24 [2020-12-23 16:54:53,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,394 INFO L625 ElimStorePlain]: treesize reduction 6, result has 88.9 percent of original size [2020-12-23 16:54:53,397 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:54:53,416 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:53,416 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 48 [2020-12-23 16:54:53,418 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:53,449 INFO L625 ElimStorePlain]: treesize reduction 18, result has 58.1 percent of original size [2020-12-23 16:54:53,450 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 16:54:53,451 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:78, output treesize:17 [2020-12-23 16:54:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-23 16:54:53,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:53,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 31 [2020-12-23 16:54:53,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790232955] [2020-12-23 16:54:53,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 16:54:53,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:53,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 16:54:53,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:54:53,756 INFO L87 Difference]: Start difference. First operand 611 states and 723 transitions. Second operand 32 states. [2020-12-23 16:54:54,948 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-12-23 16:54:55,176 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-12-23 16:54:55,396 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2020-12-23 16:54:55,606 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63 [2020-12-23 16:54:55,931 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-12-23 16:54:56,989 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-23 16:54:58,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:54:58,414 INFO L93 Difference]: Finished difference Result 674 states and 775 transitions. [2020-12-23 16:54:58,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 16:54:58,415 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-12-23 16:54:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:54:58,417 INFO L225 Difference]: With dead ends: 674 [2020-12-23 16:54:58,417 INFO L226 Difference]: Without dead ends: 606 [2020-12-23 16:54:58,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=467, Invalid=2395, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 16:54:58,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2020-12-23 16:54:58,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 525. [2020-12-23 16:54:58,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525 states. [2020-12-23 16:54:58,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 625 transitions. [2020-12-23 16:54:58,428 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 625 transitions. Word has length 68 [2020-12-23 16:54:58,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:54:58,428 INFO L481 AbstractCegarLoop]: Abstraction has 525 states and 625 transitions. [2020-12-23 16:54:58,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 16:54:58,428 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 625 transitions. [2020-12-23 16:54:58,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 16:54:58,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:54:58,430 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:54:58,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:58,644 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:54:58,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:54:58,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1333006979, now seen corresponding path program 2 times [2020-12-23 16:54:58,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:54:58,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380635733] [2020-12-23 16:54:58,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:54:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:54:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:54:58,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380635733] [2020-12-23 16:54:58,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093764902] [2020-12-23 16:54:58,848 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:54:58,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:54:58,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:54:58,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 16:54:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:54:58,953 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_35|], 1=[|v_#valid_42|]} [2020-12-23 16:54:58,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:54:58,957 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:54:58,958 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:58,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:58,970 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:54:58,972 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:54:58,980 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:54:58,981 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:54:58,981 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:24, output treesize:16 [2020-12-23 16:54:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-23 16:54:59,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:54:59,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-12-23 16:54:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983531687] [2020-12-23 16:54:59,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:54:59,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:54:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:54:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:54:59,412 INFO L87 Difference]: Start difference. First operand 525 states and 625 transitions. Second operand 21 states. [2020-12-23 16:55:00,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:00,246 INFO L93 Difference]: Finished difference Result 729 states and 860 transitions. [2020-12-23 16:55:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 16:55:00,246 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 69 [2020-12-23 16:55:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:00,250 INFO L225 Difference]: With dead ends: 729 [2020-12-23 16:55:00,250 INFO L226 Difference]: Without dead ends: 729 [2020-12-23 16:55:00,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=799, Unknown=0, NotChecked=0, Total=992 [2020-12-23 16:55:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2020-12-23 16:55:00,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 548. [2020-12-23 16:55:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2020-12-23 16:55:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 660 transitions. [2020-12-23 16:55:00,262 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 660 transitions. Word has length 69 [2020-12-23 16:55:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:00,262 INFO L481 AbstractCegarLoop]: Abstraction has 548 states and 660 transitions. [2020-12-23 16:55:00,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:55:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 660 transitions. [2020-12-23 16:55:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-23 16:55:00,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:00,263 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 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 16:55:00,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 16:55:00,477 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:00,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:00,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1188026188, now seen corresponding path program 8 times [2020-12-23 16:55:00,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:00,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246612171] [2020-12-23 16:55:00,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 65 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:55:00,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246612171] [2020-12-23 16:55:00,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046480132] [2020-12-23 16:55:00,705 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 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 16:55:00,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:55:00,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 16:55:00,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:01,045 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 28 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:55:01,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:01,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2020-12-23 16:55:01,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117572142] [2020-12-23 16:55:01,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 16:55:01,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:01,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 16:55:01,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-12-23 16:55:01,048 INFO L87 Difference]: Start difference. First operand 548 states and 660 transitions. Second operand 24 states. [2020-12-23 16:55:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:02,162 INFO L93 Difference]: Finished difference Result 673 states and 782 transitions. [2020-12-23 16:55:02,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 16:55:02,162 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2020-12-23 16:55:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:02,166 INFO L225 Difference]: With dead ends: 673 [2020-12-23 16:55:02,166 INFO L226 Difference]: Without dead ends: 673 [2020-12-23 16:55:02,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=827, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:55:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2020-12-23 16:55:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 611. [2020-12-23 16:55:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-23 16:55:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 738 transitions. [2020-12-23 16:55:02,177 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 738 transitions. Word has length 69 [2020-12-23 16:55:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:02,177 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 738 transitions. [2020-12-23 16:55:02,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 16:55:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 738 transitions. [2020-12-23 16:55:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-23 16:55:02,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:02,178 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:02,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:02,392 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1119450658, now seen corresponding path program 1 times [2020-12-23 16:55:02,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:02,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804518834] [2020-12-23 16:55:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:55:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804518834] [2020-12-23 16:55:02,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006432435] [2020-12-23 16:55:02,621 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 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 16:55:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:02,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 16:55:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:55:02,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:02,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 19 [2020-12-23 16:55:02,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071746041] [2020-12-23 16:55:02,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 16:55:02,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 16:55:02,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-12-23 16:55:02,897 INFO L87 Difference]: Start difference. First operand 611 states and 738 transitions. Second operand 20 states. [2020-12-23 16:55:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:03,524 INFO L93 Difference]: Finished difference Result 1121 states and 1317 transitions. [2020-12-23 16:55:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 16:55:03,525 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 71 [2020-12-23 16:55:03,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:03,532 INFO L225 Difference]: With dead ends: 1121 [2020-12-23 16:55:03,532 INFO L226 Difference]: Without dead ends: 1121 [2020-12-23 16:55:03,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=488, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:55:03,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2020-12-23 16:55:03,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 653. [2020-12-23 16:55:03,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 653 states. [2020-12-23 16:55:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 793 transitions. [2020-12-23 16:55:03,548 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 793 transitions. Word has length 71 [2020-12-23 16:55:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:03,548 INFO L481 AbstractCegarLoop]: Abstraction has 653 states and 793 transitions. [2020-12-23 16:55:03,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 16:55:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 793 transitions. [2020-12-23 16:55:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-12-23 16:55:03,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:03,549 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:03,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 16:55:03,762 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2050255873, now seen corresponding path program 1 times [2020-12-23 16:55:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:03,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369995329] [2020-12-23 16:55:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:55:03,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369995329] [2020-12-23 16:55:03,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785238839] [2020-12-23 16:55:03,968 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 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 16:55:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 16:55:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:04,068 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_43|]} [2020-12-23 16:55:04,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:04,072 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 16:55:04,073 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:04,081 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:04,085 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 16:55:04,086 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:04,094 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:04,095 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 16:55:04,095 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-12-23 16:55:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:55:04,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:04,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2020-12-23 16:55:04,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322138103] [2020-12-23 16:55:04,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:55:04,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:04,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:55:04,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:55:04,457 INFO L87 Difference]: Start difference. First operand 653 states and 793 transitions. Second operand 22 states. [2020-12-23 16:55:05,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:05,323 INFO L93 Difference]: Finished difference Result 869 states and 1037 transitions. [2020-12-23 16:55:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:55:05,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 73 [2020-12-23 16:55:05,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:05,326 INFO L225 Difference]: With dead ends: 869 [2020-12-23 16:55:05,327 INFO L226 Difference]: Without dead ends: 869 [2020-12-23 16:55:05,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 16:55:05,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2020-12-23 16:55:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 656. [2020-12-23 16:55:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-23 16:55:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 796 transitions. [2020-12-23 16:55:05,339 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 796 transitions. Word has length 73 [2020-12-23 16:55:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:05,339 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 796 transitions. [2020-12-23 16:55:05,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:55:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 796 transitions. [2020-12-23 16:55:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:55:05,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:05,341 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:05,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:05,555 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:05,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:05,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1419954798, now seen corresponding path program 1 times [2020-12-23 16:55:05,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:05,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669265791] [2020-12-23 16:55:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:55:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669265791] [2020-12-23 16:55:05,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306801938] [2020-12-23 16:55:05,894 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 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 16:55:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:05,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-23 16:55:05,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:06,005 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 16:55:06,007 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:06,012 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:06,012 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:06,012 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-12-23 16:55:06,249 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:06,250 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:06,258 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:06,259 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 16:55:06,259 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:24 [2020-12-23 16:55:06,327 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:55:06,328 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:06,340 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:06,342 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 16:55:06,343 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:34 [2020-12-23 16:55:07,370 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:55:07,375 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:07,375 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 28 [2020-12-23 16:55:07,377 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:07,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:07,394 INFO L547 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:07,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:64, output treesize:14 [2020-12-23 16:55:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-23 16:55:07,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:07,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22] total 36 [2020-12-23 16:55:07,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519856215] [2020-12-23 16:55:07,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:55:07,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:07,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:55:07,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:55:07,486 INFO L87 Difference]: Start difference. First operand 656 states and 796 transitions. Second operand 36 states. [2020-12-23 16:55:09,765 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 76 [2020-12-23 16:55:10,027 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-23 16:55:10,266 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 79 [2020-12-23 16:55:10,476 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-12-23 16:55:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:10,497 INFO L93 Difference]: Finished difference Result 683 states and 818 transitions. [2020-12-23 16:55:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 16:55:10,498 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-23 16:55:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:10,500 INFO L225 Difference]: With dead ends: 683 [2020-12-23 16:55:10,500 INFO L226 Difference]: Without dead ends: 664 [2020-12-23 16:55:10,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 16:55:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2020-12-23 16:55:10,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 656. [2020-12-23 16:55:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-23 16:55:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 789 transitions. [2020-12-23 16:55:10,510 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 789 transitions. Word has length 74 [2020-12-23 16:55:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:10,510 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 789 transitions. [2020-12-23 16:55:10,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:55:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 789 transitions. [2020-12-23 16:55:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 16:55:10,511 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:10,512 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 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 16:55:10,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 16:55:10,725 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:10,726 INFO L82 PathProgramCache]: Analyzing trace with hash 136339069, now seen corresponding path program 9 times [2020-12-23 16:55:10,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:10,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401454302] [2020-12-23 16:55:10,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:55:11,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401454302] [2020-12-23 16:55:11,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097200356] [2020-12-23 16:55:11,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:11,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-23 16:55:11,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:11,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 16:55:11,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:11,297 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 16:55:11,298 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,302 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,303 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,303 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-12-23 16:55:11,601 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2020-12-23 16:55:11,602 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,610 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,611 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 16:55:11,612 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:21 [2020-12-23 16:55:11,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2020-12-23 16:55:11,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:11,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:11,686 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 4 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:11,696 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:35, output treesize:31 [2020-12-23 16:55:12,422 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:12,423 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2020-12-23 16:55:12,425 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:12,440 INFO L625 ElimStorePlain]: treesize reduction 5, result has 73.7 percent of original size [2020-12-23 16:55:12,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:12,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 7 variables, input treesize:38, output treesize:3 [2020-12-23 16:55:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:55:12,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:12,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2020-12-23 16:55:12,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50971203] [2020-12-23 16:55:12,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 16:55:12,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:12,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 16:55:12,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 16:55:12,476 INFO L87 Difference]: Start difference. First operand 656 states and 789 transitions. Second operand 36 states. [2020-12-23 16:55:18,169 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-23 16:55:22,301 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:55:26,464 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:55:30,736 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:55:35,071 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:55:39,473 WARN L197 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-12-23 16:55:41,930 WARN L197 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-12-23 16:55:46,107 WARN L197 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-12-23 16:55:46,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:46,652 INFO L93 Difference]: Finished difference Result 1045 states and 1227 transitions. [2020-12-23 16:55:46,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 16:55:46,653 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 74 [2020-12-23 16:55:46,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:46,656 INFO L225 Difference]: With dead ends: 1045 [2020-12-23 16:55:46,656 INFO L226 Difference]: Without dead ends: 959 [2020-12-23 16:55:46,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=314, Invalid=2766, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:55:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-12-23 16:55:46,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 908. [2020-12-23 16:55:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 908 states. [2020-12-23 16:55:46,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 1094 transitions. [2020-12-23 16:55:46,672 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 1094 transitions. Word has length 74 [2020-12-23 16:55:46,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:46,672 INFO L481 AbstractCegarLoop]: Abstraction has 908 states and 1094 transitions. [2020-12-23 16:55:46,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 16:55:46,672 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 1094 transitions. [2020-12-23 16:55:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-23 16:55:46,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:46,674 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:46,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 16:55:46,888 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1093789664, now seen corresponding path program 1 times [2020-12-23 16:55:46,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:46,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524892480] [2020-12-23 16:55:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:55:47,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524892480] [2020-12-23 16:55:47,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041580963] [2020-12-23 16:55:47,154 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:47,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:47,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 16:55:47,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-23 16:55:47,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:47,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2020-12-23 16:55:47,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512069357] [2020-12-23 16:55:47,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 16:55:47,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:47,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 16:55:47,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-12-23 16:55:47,450 INFO L87 Difference]: Start difference. First operand 908 states and 1094 transitions. Second operand 21 states. [2020-12-23 16:55:48,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:48,157 INFO L93 Difference]: Finished difference Result 1769 states and 2067 transitions. [2020-12-23 16:55:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 16:55:48,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 75 [2020-12-23 16:55:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:48,165 INFO L225 Difference]: With dead ends: 1769 [2020-12-23 16:55:48,165 INFO L226 Difference]: Without dead ends: 1766 [2020-12-23 16:55:48,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:55:48,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2020-12-23 16:55:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 913. [2020-12-23 16:55:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 913 states. [2020-12-23 16:55:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 913 states to 913 states and 1105 transitions. [2020-12-23 16:55:48,180 INFO L78 Accepts]: Start accepts. Automaton has 913 states and 1105 transitions. Word has length 75 [2020-12-23 16:55:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:48,180 INFO L481 AbstractCegarLoop]: Abstraction has 913 states and 1105 transitions. [2020-12-23 16:55:48,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 16:55:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 913 states and 1105 transitions. [2020-12-23 16:55:48,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:55:48,182 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:48,182 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:48,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:48,397 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:48,398 INFO L82 PathProgramCache]: Analyzing trace with hash -839159297, now seen corresponding path program 3 times [2020-12-23 16:55:48,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:48,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613029780] [2020-12-23 16:55:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:48,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:48,566 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-23 16:55:48,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613029780] [2020-12-23 16:55:48,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925805017] [2020-12-23 16:55:48,566 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 16:55:48,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:55:48,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:48,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-23 16:55:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:48,712 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_37|], 1=[|v_#valid_46|]} [2020-12-23 16:55:48,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:48,717 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 16:55:48,718 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,729 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:48,735 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 16:55:48,736 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,749 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:48,750 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,750 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-23 16:55:48,843 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 16:55:48,844 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,859 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:48,860 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:48,861 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:31 [2020-12-23 16:55:48,914 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 29 treesize of output 28 [2020-12-23 16:55:48,916 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:48,932 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:48,934 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 16:55:48,934 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:38 [2020-12-23 16:55:49,652 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:49,653 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 42 [2020-12-23 16:55:49,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:49,669 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:49,671 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 16:55:49,673 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:49,674 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:33 [2020-12-23 16:55:49,977 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2020-12-23 16:55:49,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:49,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 25 [2020-12-23 16:55:49,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865197504] [2020-12-23 16:55:49,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 16:55:49,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:49,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 16:55:49,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=548, Unknown=0, NotChecked=0, Total=600 [2020-12-23 16:55:49,978 INFO L87 Difference]: Start difference. First operand 913 states and 1105 transitions. Second operand 25 states. [2020-12-23 16:55:53,386 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 96 [2020-12-23 16:55:53,622 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-12-23 16:55:54,036 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-12-23 16:55:54,493 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 82 [2020-12-23 16:55:55,011 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-12-23 16:55:56,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:55:56,271 INFO L93 Difference]: Finished difference Result 2336 states and 2709 transitions. [2020-12-23 16:55:56,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 16:55:56,272 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 77 [2020-12-23 16:55:56,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:55:56,283 INFO L225 Difference]: With dead ends: 2336 [2020-12-23 16:55:56,283 INFO L226 Difference]: Without dead ends: 2303 [2020-12-23 16:55:56,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=532, Invalid=2548, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 16:55:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2020-12-23 16:55:56,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 1340. [2020-12-23 16:55:56,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2020-12-23 16:55:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1634 transitions. [2020-12-23 16:55:56,302 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1634 transitions. Word has length 77 [2020-12-23 16:55:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:55:56,303 INFO L481 AbstractCegarLoop]: Abstraction has 1340 states and 1634 transitions. [2020-12-23 16:55:56,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 16:55:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1634 transitions. [2020-12-23 16:55:56,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-23 16:55:56,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:55:56,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:55:56,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 16:55:56,520 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:55:56,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:55:56,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1083596167, now seen corresponding path program 3 times [2020-12-23 16:55:56,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:55:56,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294468599] [2020-12-23 16:55:56,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:55:56,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:55:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-23 16:55:56,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294468599] [2020-12-23 16:55:56,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133162176] [2020-12-23 16:55:56,760 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:55:56,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 16:55:56,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:55:56,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:55:56,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:55:56,876 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_38|], 3=[|v_#valid_47|]} [2020-12-23 16:55:56,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:56,881 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 16:55:56,882 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,893 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,906 INFO L348 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-12-23 16:55:56,906 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 18 [2020-12-23 16:55:56,908 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,919 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:56,920 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:56,920 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:31 [2020-12-23 16:55:57,190 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 13 treesize of output 9 [2020-12-23 16:55:57,191 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,207 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:57,209 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 16:55:57,209 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-23 16:55:57,270 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 13 treesize of output 9 [2020-12-23 16:55:57,271 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,289 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:57,291 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 16:55:57,291 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-23 16:55:57,357 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 13 treesize of output 9 [2020-12-23 16:55:57,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,375 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:57,376 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 16:55:57,377 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:34 [2020-12-23 16:55:57,488 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2020-12-23 16:55:57,489 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,505 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:57,506 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,506 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-12-23 16:55:57,563 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 28 treesize of output 27 [2020-12-23 16:55:57,564 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,579 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:57,580 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:55:57,580 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:46 [2020-12-23 16:55:58,272 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-23 16:55:58,274 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:55:58,288 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:58,290 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:55:58,290 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:48 [2020-12-23 16:55:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:55:58,494 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:58,495 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2020-12-23 16:55:58,498 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-12-23 16:55:58,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:55:58,521 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 16:55:58,521 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:65, output treesize:37 [2020-12-23 16:55:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-23 16:55:59,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:55:59,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24] total 37 [2020-12-23 16:55:59,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140667719] [2020-12-23 16:55:59,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 16:55:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:55:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 16:55:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 16:55:59,127 INFO L87 Difference]: Start difference. First operand 1340 states and 1634 transitions. Second operand 38 states. [2020-12-23 16:56:03,566 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-12-23 16:56:03,808 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-12-23 16:56:04,100 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-12-23 16:56:04,382 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 75 [2020-12-23 16:56:04,671 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-12-23 16:56:04,975 WARN L197 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 77 [2020-12-23 16:56:05,299 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 84 [2020-12-23 16:56:05,600 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-23 16:56:06,070 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-23 16:56:06,433 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 90 [2020-12-23 16:56:06,807 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 93 [2020-12-23 16:56:07,309 WARN L197 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 98 [2020-12-23 16:56:07,609 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:07,993 WARN L197 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-12-23 16:56:08,343 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:08,744 WARN L197 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 91 [2020-12-23 16:56:09,217 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-23 16:56:09,682 WARN L197 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 102 [2020-12-23 16:56:10,126 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-23 16:56:10,515 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:10,992 WARN L197 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:11,394 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-23 16:56:12,150 WARN L197 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-23 16:56:12,593 WARN L197 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-23 16:56:13,061 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:13,442 WARN L197 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-12-23 16:56:13,884 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-23 16:56:14,673 WARN L197 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-23 16:56:15,119 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 96 [2020-12-23 16:56:15,610 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 85 [2020-12-23 16:56:15,986 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 92 [2020-12-23 16:56:16,314 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 86 [2020-12-23 16:56:16,833 WARN L197 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-23 16:56:17,254 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 91 [2020-12-23 16:56:17,936 WARN L197 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 98 [2020-12-23 16:56:18,363 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 91 [2020-12-23 16:56:18,671 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2020-12-23 16:56:19,057 WARN L197 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-12-23 16:56:19,644 WARN L197 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-23 16:56:20,275 WARN L197 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 97 [2020-12-23 16:56:20,747 WARN L197 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 104 [2020-12-23 16:56:21,124 WARN L197 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 91 [2020-12-23 16:56:21,656 WARN L197 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 109 [2020-12-23 16:56:22,260 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 95 [2020-12-23 16:56:22,811 WARN L197 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 107 [2020-12-23 16:56:23,466 WARN L197 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 106 [2020-12-23 16:56:24,203 WARN L197 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-23 16:56:25,132 WARN L197 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 108 [2020-12-23 16:56:25,551 WARN L197 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 104 [2020-12-23 16:56:26,073 WARN L197 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 115 [2020-12-23 16:56:26,588 WARN L197 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 111 [2020-12-23 16:56:27,215 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 120 [2020-12-23 16:56:27,796 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 116 [2020-12-23 16:56:28,317 WARN L197 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 102 [2020-12-23 16:56:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:28,711 INFO L93 Difference]: Finished difference Result 1872 states and 2191 transitions. [2020-12-23 16:56:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 16:56:28,712 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 77 [2020-12-23 16:56:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:28,719 INFO L225 Difference]: With dead ends: 1872 [2020-12-23 16:56:28,719 INFO L226 Difference]: Without dead ends: 1674 [2020-12-23 16:56:28,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3678 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=2585, Invalid=13927, Unknown=0, NotChecked=0, Total=16512 [2020-12-23 16:56:28,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2020-12-23 16:56:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1254. [2020-12-23 16:56:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1254 states. [2020-12-23 16:56:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1523 transitions. [2020-12-23 16:56:28,735 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1523 transitions. Word has length 77 [2020-12-23 16:56:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:28,736 INFO L481 AbstractCegarLoop]: Abstraction has 1254 states and 1523 transitions. [2020-12-23 16:56:28,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 16:56:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1523 transitions. [2020-12-23 16:56:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 16:56:28,737 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:28,738 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:28,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:28,952 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:56:28,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:28,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1469280949, now seen corresponding path program 2 times [2020-12-23 16:56:28,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:28,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378926543] [2020-12-23 16:56:28,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:28,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:29,211 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:56:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378926543] [2020-12-23 16:56:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407946463] [2020-12-23 16:56:29,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:29,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:56:29,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:29,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 16:56:29,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:56:29,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:29,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2020-12-23 16:56:29,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349368488] [2020-12-23 16:56:29,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 16:56:29,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:29,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 16:56:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2020-12-23 16:56:29,592 INFO L87 Difference]: Start difference. First operand 1254 states and 1523 transitions. Second operand 22 states. [2020-12-23 16:56:30,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:30,783 INFO L93 Difference]: Finished difference Result 1679 states and 1994 transitions. [2020-12-23 16:56:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:56:30,784 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-12-23 16:56:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:30,789 INFO L225 Difference]: With dead ends: 1679 [2020-12-23 16:56:30,789 INFO L226 Difference]: Without dead ends: 1679 [2020-12-23 16:56:30,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:56:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2020-12-23 16:56:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1312. [2020-12-23 16:56:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1312 states. [2020-12-23 16:56:30,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1589 transitions. [2020-12-23 16:56:30,805 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1589 transitions. Word has length 78 [2020-12-23 16:56:30,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:30,806 INFO L481 AbstractCegarLoop]: Abstraction has 1312 states and 1589 transitions. [2020-12-23 16:56:30,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 16:56:30,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1589 transitions. [2020-12-23 16:56:30,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 16:56:30,807 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:30,807 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 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 16:56:31,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 16:56:31,021 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:56:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1542070618, now seen corresponding path program 10 times [2020-12-23 16:56:31,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:31,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656052867] [2020-12-23 16:56:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:56:31,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656052867] [2020-12-23 16:56:31,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940215767] [2020-12-23 16:56:31,316 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 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 16:56:31,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 16:56:31,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:31,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 16:56:31,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:56:31,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:31,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2020-12-23 16:56:31,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319690552] [2020-12-23 16:56:31,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 16:56:31,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:31,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 16:56:31,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-12-23 16:56:31,740 INFO L87 Difference]: Start difference. First operand 1312 states and 1589 transitions. Second operand 26 states. [2020-12-23 16:56:33,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:33,327 INFO L93 Difference]: Finished difference Result 1579 states and 1873 transitions. [2020-12-23 16:56:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 16:56:33,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 78 [2020-12-23 16:56:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:33,350 INFO L225 Difference]: With dead ends: 1579 [2020-12-23 16:56:33,350 INFO L226 Difference]: Without dead ends: 1579 [2020-12-23 16:56:33,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 16:56:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2020-12-23 16:56:33,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1442. [2020-12-23 16:56:33,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-12-23 16:56:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1751 transitions. [2020-12-23 16:56:33,368 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1751 transitions. Word has length 78 [2020-12-23 16:56:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:33,369 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1751 transitions. [2020-12-23 16:56:33,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 16:56:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1751 transitions. [2020-12-23 16:56:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 16:56:33,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:33,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:33,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 16:56:33,584 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:56:33,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:33,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2082933016, now seen corresponding path program 2 times [2020-12-23 16:56:33,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:33,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670869698] [2020-12-23 16:56:33,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-23 16:56:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670869698] [2020-12-23 16:56:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316543399] [2020-12-23 16:56:33,763 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 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 16:56:33,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 16:56:33,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:33,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 16:56:33,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-23 16:56:34,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:34,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 28 [2020-12-23 16:56:34,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704430743] [2020-12-23 16:56:34,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 16:56:34,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 16:56:34,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2020-12-23 16:56:34,240 INFO L87 Difference]: Start difference. First operand 1442 states and 1751 transitions. Second operand 28 states. [2020-12-23 16:56:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:56:37,338 INFO L93 Difference]: Finished difference Result 3381 states and 3910 transitions. [2020-12-23 16:56:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 16:56:37,339 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 82 [2020-12-23 16:56:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:56:37,350 INFO L225 Difference]: With dead ends: 3381 [2020-12-23 16:56:37,350 INFO L226 Difference]: Without dead ends: 3359 [2020-12-23 16:56:37,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=670, Invalid=3362, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 16:56:37,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2020-12-23 16:56:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 1516. [2020-12-23 16:56:37,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1516 states. [2020-12-23 16:56:37,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1516 states to 1516 states and 1826 transitions. [2020-12-23 16:56:37,390 INFO L78 Accepts]: Start accepts. Automaton has 1516 states and 1826 transitions. Word has length 82 [2020-12-23 16:56:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:56:37,390 INFO L481 AbstractCegarLoop]: Abstraction has 1516 states and 1826 transitions. [2020-12-23 16:56:37,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 16:56:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1516 states and 1826 transitions. [2020-12-23 16:56:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 16:56:37,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:56:37,392 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 16:56:37,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:56:37,594 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:56:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:56:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -86779040, now seen corresponding path program 3 times [2020-12-23 16:56:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:56:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040576081] [2020-12-23 16:56:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:56:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:56:38,031 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-23 16:56:38,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040576081] [2020-12-23 16:56:38,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335935649] [2020-12-23 16:56:38,031 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 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 16:56:38,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 16:56:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:56:38,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-23 16:56:38,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:56:38,150 INFO L443 ElimStorePlain]: Different costs {0=[|v_#length_39|], 1=[|v_#valid_48|]} [2020-12-23 16:56:38,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:56:38,156 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-12-23 16:56:38,157 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,169 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:38,174 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-12-23 16:56:38,176 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,185 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:38,186 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,186 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:24, output treesize:21 [2020-12-23 16:56:38,290 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 16:56:38,293 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,305 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:38,306 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,306 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2020-12-23 16:56:38,355 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 28 treesize of output 27 [2020-12-23 16:56:38,360 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,369 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:38,372 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-23 16:56:38,373 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:31 [2020-12-23 16:56:39,111 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:39,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 41 [2020-12-23 16:56:39,114 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:56:39,130 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:56:39,132 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-23 16:56:39,132 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2020-12-23 16:56:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-23 16:56:39,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:56:39,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 33 [2020-12-23 16:56:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148369692] [2020-12-23 16:56:39,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 16:56:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:56:39,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 16:56:39,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=980, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 16:56:39,461 INFO L87 Difference]: Start difference. First operand 1516 states and 1826 transitions. Second operand 33 states. [2020-12-23 16:56:41,578 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-12-23 16:56:41,903 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-12-23 16:56:42,239 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-12-23 16:56:42,984 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-12-23 16:56:43,734 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-23 16:56:43,924 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 61 [2020-12-23 16:56:44,336 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-12-23 16:56:44,599 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2020-12-23 16:56:45,150 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-12-23 16:56:49,578 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-23 16:56:49,859 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-12-23 16:56:50,052 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-12-23 16:56:50,316 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2020-12-23 16:56:52,567 WARN L197 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 16:56:56,985 WARN L197 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-12-23 16:56:57,250 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 16:56:57,493 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-12-23 16:56:57,773 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 16:56:58,357 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-23 16:57:02,659 WARN L197 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-23 16:57:02,949 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2020-12-23 16:57:05,219 WARN L197 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-23 16:57:09,518 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-12-23 16:57:13,744 WARN L197 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2020-12-23 16:57:14,021 WARN L197 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 16:57:14,290 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 16:57:14,643 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-23 16:57:15,113 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 81 [2020-12-23 16:57:19,628 WARN L197 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-12-23 16:57:19,931 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2020-12-23 16:57:24,286 WARN L197 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 77 DAG size of output: 73 [2020-12-23 16:57:24,522 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2020-12-23 16:57:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:25,065 INFO L93 Difference]: Finished difference Result 2089 states and 2423 transitions. [2020-12-23 16:57:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 16:57:25,066 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 83 [2020-12-23 16:57:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:25,074 INFO L225 Difference]: With dead ends: 2089 [2020-12-23 16:57:25,074 INFO L226 Difference]: Without dead ends: 1761 [2020-12-23 16:57:25,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=1389, Invalid=8313, Unknown=0, NotChecked=0, Total=9702 [2020-12-23 16:57:25,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2020-12-23 16:57:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1299. [2020-12-23 16:57:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1299 states. [2020-12-23 16:57:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1560 transitions. [2020-12-23 16:57:25,102 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1560 transitions. Word has length 83 [2020-12-23 16:57:25,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:25,102 INFO L481 AbstractCegarLoop]: Abstraction has 1299 states and 1560 transitions. [2020-12-23 16:57:25,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 16:57:25,103 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1560 transitions. [2020-12-23 16:57:25,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-23 16:57:25,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:25,104 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 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 16:57:25,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 16:57:25,321 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1908944175, now seen corresponding path program 11 times [2020-12-23 16:57:25,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:25,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104220923] [2020-12-23 16:57:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:57:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104220923] [2020-12-23 16:57:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317219623] [2020-12-23 16:57:25,924 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 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 16:57:26,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-23 16:57:26,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:26,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-23 16:57:26,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 16:57:26,577 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 16:57:26,578 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:26,591 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:26,592 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 16:57:26,593 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:23 [2020-12-23 16:57:26,714 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:26,714 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 16:57:26,716 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:26,761 INFO L625 ElimStorePlain]: treesize reduction 35, result has 48.5 percent of original size [2020-12-23 16:57:26,763 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 16:57:26,763 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:33 [2020-12-23 16:57:27,866 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 16:57:27,868 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:27,883 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:27,885 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-12-23 16:57:27,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:40 [2020-12-23 16:57:28,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-23 16:57:28,593 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-23 16:57:28,671 INFO L348 Elim1Store]: treesize reduction 14, result has 78.8 percent of original size [2020-12-23 16:57:28,671 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 38 treesize of output 65 [2020-12-23 16:57:28,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-23 16:57:28,684 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-23 16:57:28,686 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 16:57:28,687 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:44, output treesize:3 [2020-12-23 16:57:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 17 proven. 136 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:57:28,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 16:57:28,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 46 [2020-12-23 16:57:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936078951] [2020-12-23 16:57:28,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 16:57:28,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 16:57:28,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 16:57:28,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1958, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 16:57:28,760 INFO L87 Difference]: Start difference. First operand 1299 states and 1560 transitions. Second operand 46 states. [2020-12-23 16:57:31,311 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-12-23 16:57:31,564 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:57:31,853 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:57:32,116 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-12-23 16:57:32,661 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-12-23 16:57:32,898 WARN L197 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2020-12-23 16:57:33,147 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-12-23 16:57:33,398 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-23 16:57:33,664 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-12-23 16:57:33,926 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-12-23 16:57:35,182 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-12-23 16:57:36,986 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-23 16:57:37,220 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-12-23 16:57:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 16:57:38,217 INFO L93 Difference]: Finished difference Result 2718 states and 3193 transitions. [2020-12-23 16:57:38,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 16:57:38,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 83 [2020-12-23 16:57:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 16:57:38,225 INFO L225 Difference]: With dead ends: 2718 [2020-12-23 16:57:38,225 INFO L226 Difference]: Without dead ends: 2264 [2020-12-23 16:57:38,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=645, Invalid=7011, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 16:57:38,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2020-12-23 16:57:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 1763. [2020-12-23 16:57:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1763 states. [2020-12-23 16:57:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2125 transitions. [2020-12-23 16:57:38,257 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2125 transitions. Word has length 83 [2020-12-23 16:57:38,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 16:57:38,258 INFO L481 AbstractCegarLoop]: Abstraction has 1763 states and 2125 transitions. [2020-12-23 16:57:38,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 16:57:38,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2125 transitions. [2020-12-23 16:57:38,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-23 16:57:38,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 16:57:38,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 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 16:57:38,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 16:57:38,473 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-23 16:57:38,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 16:57:38,474 INFO L82 PathProgramCache]: Analyzing trace with hash -616606990, now seen corresponding path program 12 times [2020-12-23 16:57:38,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 16:57:38,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370719291] [2020-12-23 16:57:38,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 16:57:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 16:57:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 50 proven. 128 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-23 16:57:38,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370719291] [2020-12-23 16:57:38,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782230461] [2020-12-23 16:57:38,898 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 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 16:57:39,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-23 16:57:39,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 16:57:39,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 16:57:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates...